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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="headertitle"><div class="title">Allocation names and user data</div></div>
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<div class="contents">
<div class="textblock"><h1><a class="anchor" id="allocation_user_data"></a>
Allocation user data</h1>
<p>You can annotate allocations with your own information, e.g. for debugging purposes. To do that, fill <a class="el" href="struct_vma_allocation_create_info.html#a8259e85c272683434f4abb4ddddffe19" title="Custom general-purpose pointer that will be stored in VmaAllocation, can be read as VmaAllocationInfo...">VmaAllocationCreateInfo::pUserData</a> field when creating an allocation. It is an opaque <code>void*</code> pointer. You can use it e.g. as a pointer, some handle, index, key, ordinal number or any other value that would associate the allocation with your custom metadata. It is useful to identify appropriate data structures in your engine given <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a>, e.g. when doing <a class="el" href="defragmentation.html">Defragmentation</a>.</p>
<div class="fragment"><div class="line">VkBufferCreateInfo bufCreateInfo = ...</div>
<div class="line"> </div>
<div class="line">MyBufferMetadata* pMetadata = CreateBufferMetadata();</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a8259e85c272683434f4abb4ddddffe19">pUserData</a> = pMetadata;</div>
<div class="line"> </div>
<div class="line">VkBuffer buffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufCreateInfo, &amp;allocCreateInfo, &amp;buffer, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_gac72ee55598617e8eecca384e746bab51"><div class="ttname"><a href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a></div><div class="ttdeci">VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Creates a new VkBuffer, allocates and binds memory for it.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e"><div class="ttname"><a href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a></div><div class="ttdeci">@ VMA_MEMORY_USAGE_AUTO</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:527</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a8259e85c272683434f4abb4ddddffe19"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a8259e85c272683434f4abb4ddddffe19">VmaAllocationCreateInfo::pUserData</a></div><div class="ttdeci">void * pUserData</div><div class="ttdoc">Custom general-purpose pointer that will be stored in VmaAllocation, can be read as VmaAllocationInfo...</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1302</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_accb8b06b1f677d858cb9af20705fa910"><div class="ttname"><a href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo::usage</a></div><div class="ttdeci">VmaMemoryUsage usage</div><div class="ttdoc">Intended usage of memory.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1271</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
</div><!-- fragment --><p>The pointer may be later retrieved as <a class="el" href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13" title="Custom general-purpose pointer that was passed as VmaAllocationCreateInfo::pUserData or set using vma...">VmaAllocationInfo::pUserData</a>:</p>
<div class="fragment"><div class="line"><a class="code hl_struct" href="struct_vma_allocation_info.html">VmaAllocationInfo</a> allocInfo;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a>(allocator, allocation, &amp;allocInfo);</div>
<div class="line">MyBufferMetadata* pMetadata = (MyBufferMetadata*)allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">pUserData</a>;</div>
<div class="ttc" id="agroup__group__alloc_html_ga86dd08aba8633bfa4ad0df2e76481d8b"><div class="ttname"><a href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a></div><div class="ttdeci">void vmaGetAllocationInfo(VmaAllocator allocator, VmaAllocation allocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Returns current information about specified allocation.</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html"><div class="ttname"><a href="struct_vma_allocation_info.html">VmaAllocationInfo</a></div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1382</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html_adc507656149c04de7ed95d0042ba2a13"><div class="ttname"><a href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">VmaAllocationInfo::pUserData</a></div><div class="ttdeci">void * pUserData</div><div class="ttdoc">Custom general-purpose pointer that was passed as VmaAllocationCreateInfo::pUserData or set using vma...</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1429</div></div>
</div><!-- fragment --><p>It can also be changed using function <a class="el" href="group__group__alloc.html#gaf9147d31ffc11d62fc187bde283ed14f" title="Sets pUserData in given allocation to new value.">vmaSetAllocationUserData()</a>.</p>
<p>Values of (non-zero) allocations' <code>pUserData</code> are printed in JSON report created by <a class="el" href="group__group__stats.html#gaa4fee7eb5253377599ef4fd38c93c2a0" title="Builds and returns statistics as a null-terminated string in JSON format.">vmaBuildStatsString()</a> in hexadecimal form.</p>
<h1><a class="anchor" id="allocation_names"></a>
Allocation names</h1>
<p>An allocation can also carry a null-terminated string, giving a name to the allocation. To set it, call <a class="el" href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc" title="Sets pName in given allocation to new value.">vmaSetAllocationName()</a>. The library creates internal copy of the string, so the pointer you pass doesn't need to be valid for whole lifetime of the allocation. You can free it after the call.</p>
<div class="fragment"><div class="line">std::string imageName = <span class="stringliteral">&quot;Texture: &quot;</span>;</div>
<div class="line">imageName += fileName;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc">vmaSetAllocationName</a>(allocator, allocation, imageName.c_str());</div>
<div class="ttc" id="agroup__group__alloc_html_gabe02cbb0cd913b3f125958179f2020fc"><div class="ttname"><a href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc">vmaSetAllocationName</a></div><div class="ttdeci">void vmaSetAllocationName(VmaAllocator allocator, VmaAllocation allocation, const char *pName)</div><div class="ttdoc">Sets pName in given allocation to new value.</div></div>
</div><!-- fragment --><p>The string can be later retrieved by inspecting <a class="el" href="struct_vma_allocation_info.html#a28612f3e897e5b268254a3c63413d759" title="Custom allocation name that was set with vmaSetAllocationName().">VmaAllocationInfo::pName</a>. It is also printed in JSON report created by <a class="el" href="group__group__stats.html#gaa4fee7eb5253377599ef4fd38c93c2a0" title="Builds and returns statistics as a null-terminated string in JSON format.">vmaBuildStatsString()</a>.</p>
<dl class="section note"><dt>Note</dt><dd>Setting string name to VMA allocation doesn't automatically set it to the Vulkan buffer or image created with it. You must do it manually using an extension like VK_EXT_debug_utils, which is independent of this library. </dd></dl>
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<div class="textblock">Here are the classes, structs, unions and interfaces with brief descriptions:</div><div class="directory">
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<tr id="row_0_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocation.html" target="_self">VmaAllocation</a></td><td class="desc">Represents single memory allocation </td></tr>
<tr id="row_1_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocation_create_info.html" target="_self">VmaAllocationCreateInfo</a></td><td class="desc">Parameters of new <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> </td></tr>
<tr id="row_2_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocation_info.html" target="_self">VmaAllocationInfo</a></td><td class="desc"></td></tr>
<tr id="row_3_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocation_info2.html" target="_self">VmaAllocationInfo2</a></td><td class="desc">Extended parameters of a <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> object that can be retrieved using function <a class="el" href="group__group__alloc.html#ga1405cf3eae2fd1305d645879173031a0" title="Returns extended information about specified allocation.">vmaGetAllocationInfo2()</a> </td></tr>
<tr id="row_4_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocator.html" target="_self">VmaAllocator</a></td><td class="desc">Represents main object of this library initialized </td></tr>
<tr id="row_5_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocator_create_info.html" target="_self">VmaAllocatorCreateInfo</a></td><td class="desc">Description of a Allocator to be created </td></tr>
<tr id="row_6_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_allocator_info.html" target="_self">VmaAllocatorInfo</a></td><td class="desc">Information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object </td></tr>
<tr id="row_7_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_budget.html" target="_self">VmaBudget</a></td><td class="desc">Statistics of current memory usage and available budget for a specific memory heap </td></tr>
<tr id="row_8_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_defragmentation_context.html" target="_self">VmaDefragmentationContext</a></td><td class="desc">An opaque object that represents started defragmentation process </td></tr>
<tr id="row_9_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_defragmentation_info.html" target="_self">VmaDefragmentationInfo</a></td><td class="desc">Parameters for defragmentation </td></tr>
<tr id="row_10_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_defragmentation_move.html" target="_self">VmaDefragmentationMove</a></td><td class="desc">Single move of an allocation to be done for defragmentation </td></tr>
<tr id="row_11_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_defragmentation_pass_move_info.html" target="_self">VmaDefragmentationPassMoveInfo</a></td><td class="desc">Parameters for incremental defragmentation steps </td></tr>
<tr id="row_12_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_defragmentation_stats.html" target="_self">VmaDefragmentationStats</a></td><td class="desc">Statistics returned for defragmentation process in function <a class="el" href="group__group__alloc.html#ga59f01ca3d53d50b7cca9b442b77a3e87" title="Ends defragmentation process.">vmaEndDefragmentation()</a> </td></tr>
<tr id="row_13_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_detailed_statistics.html" target="_self">VmaDetailedStatistics</a></td><td class="desc">More detailed statistics than <a class="el" href="struct_vma_statistics.html" title="Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...">VmaStatistics</a> </td></tr>
<tr id="row_14_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_device_memory_callbacks.html" target="_self">VmaDeviceMemoryCallbacks</a></td><td class="desc">Set of callbacks that the library will call for <code>vkAllocateMemory</code> and <code>vkFreeMemory</code> </td></tr>
<tr id="row_15_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_pool.html" target="_self">VmaPool</a></td><td class="desc">Represents custom memory pool </td></tr>
<tr id="row_16_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_pool_create_info.html" target="_self">VmaPoolCreateInfo</a></td><td class="desc">Describes parameter of created <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> </td></tr>
<tr id="row_17_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_statistics.html" target="_self">VmaStatistics</a></td><td class="desc">Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool, or total </td></tr>
<tr id="row_18_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_total_statistics.html" target="_self">VmaTotalStatistics</a></td><td class="desc">General statistics from current state of the Allocator - total memory usage across all memory heaps and types </td></tr>
<tr id="row_19_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_virtual_allocation.html" target="_self">VmaVirtualAllocation</a></td><td class="desc">Represents single memory allocation done inside <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> </td></tr>
<tr id="row_20_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_virtual_allocation_create_info.html" target="_self">VmaVirtualAllocationCreateInfo</a></td><td class="desc">Parameters of created virtual allocation to be passed to <a class="el" href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01" title="Allocates new virtual allocation inside given VmaVirtualBlock.">vmaVirtualAllocate()</a> </td></tr>
<tr id="row_21_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_virtual_allocation_info.html" target="_self">VmaVirtualAllocationInfo</a></td><td class="desc">Parameters of an existing virtual allocation, returned by <a class="el" href="group__group__virtual.html#ga8ee14ceb1fe033ec84d8aa29e1f75afa" title="Returns information about a specific virtual allocation within a virtual block, like its size and pUs...">vmaGetVirtualAllocationInfo()</a> </td></tr>
<tr id="row_22_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_virtual_block.html" target="_self">VmaVirtualBlock</a></td><td class="desc">Handle to a virtual block object that allows to use core allocation algorithm without allocating any real GPU memory </td></tr>
<tr id="row_23_" class="odd"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_virtual_block_create_info.html" target="_self">VmaVirtualBlockCreateInfo</a></td><td class="desc">Parameters of created <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object to be passed to <a class="el" href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b" title="Creates new VmaVirtualBlock object.">vmaCreateVirtualBlock()</a> </td></tr>
<tr id="row_24_" class="even"><td class="entry"><span style="width:16px;display:inline-block;">&#160;</span><span class="icona"><span class="icon">C</span></span><a class="el" href="struct_vma_vulkan_functions.html" target="_self">VmaVulkanFunctions</a></td><td class="desc">Pointers to some Vulkan functions - a subset used by the library </td></tr>
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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="headertitle"><div class="title">Choosing memory type</div></div>
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<div class="textblock"><p>Physical devices in Vulkan support various combinations of memory heaps and types. Help with choosing correct and optimal memory type for your specific resource is one of the key features of this library. You can use it by filling appropriate members of <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> structure, as described below. You can also combine multiple methods.</p>
<ol type="1">
<li>If you just want to find memory type index that meets your requirements, you can use function: <a class="el" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888" title="Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndexForBufferInfo()</a>, <a class="el" href="group__group__alloc.html#ga088da83d8eaf3ce9056d9ea0b981d472" title="Helps to find memoryTypeIndex, given VkImageCreateInfo and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndexForImageInfo()</a>, <a class="el" href="group__group__alloc.html#gaef15a94b58fbcb0fe706d5720e84a74a" title="Helps to find memoryTypeIndex, given memoryTypeBits and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndex()</a>.</li>
<li>If you want to allocate a region of device memory without association with any specific image or buffer, you can use function <a class="el" href="group__group__alloc.html#gabf28077dbf82d0908b8acbe8ee8dd9b8" title="General purpose memory allocation.">vmaAllocateMemory()</a>. Usage of this function is not recommended and usually not needed. <a class="el" href="group__group__alloc.html#gad37e82e492b3de38fc3f4cffd9ad0ae1" title="General purpose memory allocation for multiple allocation objects at once.">vmaAllocateMemoryPages()</a> function is also provided for creating multiple allocations at once, which may be useful for sparse binding.</li>
<li>If you already have a buffer or an image created, you want to allocate memory for it and then you will bind it yourself, you can use function <a class="el" href="group__group__alloc.html#ga7fdf64415b6c3d83c454f28d2c53df7b" title="Allocates memory suitable for given VkBuffer.">vmaAllocateMemoryForBuffer()</a>, <a class="el" href="group__group__alloc.html#ga0faa3f9e5fb233d29d1e00390650febb" title="Allocates memory suitable for given VkImage.">vmaAllocateMemoryForImage()</a>. For binding you should use functions: <a class="el" href="group__group__alloc.html#ga6b0929b914b60cf2d45cac4bf3547470" title="Binds buffer to allocation.">vmaBindBufferMemory()</a>, <a class="el" href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5" title="Binds image to allocation.">vmaBindImageMemory()</a> or their extended versions: <a class="el" href="group__group__alloc.html#ga861f4f27189a7d11ab9d9eedc825cb6b" title="Binds buffer to allocation with additional parameters.">vmaBindBufferMemory2()</a>, <a class="el" href="group__group__alloc.html#ga5f3502dd7d38b53fb1533ea3921d038d" title="Binds image to allocation with additional parameters.">vmaBindImageMemory2()</a>.</li>
<li>If you want to create a buffer or an image, allocate memory for it, and bind them together, all in one call, you can use function <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51" title="Creates a new VkBuffer, allocates and binds memory for it.">vmaCreateBuffer()</a>, <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>. <b>This is the easiest and recommended way to use this library!</b></li>
</ol>
<p>When using 3. or 4., the library internally queries Vulkan for memory types supported for that buffer or image (function <code>vkGetBufferMemoryRequirements()</code>) and uses only one of these types.</p>
<p>If no memory type can be found that meets all the requirements, these functions return <code>VK_ERROR_FEATURE_NOT_PRESENT</code>.</p>
<p>You can leave <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> structure completely filled with zeros. It means no requirements are specified for memory type. It is valid, although not very useful.</p>
<h1><a class="anchor" id="choosing_memory_type_usage"></a>
Usage</h1>
<p>The easiest way to specify memory requirements is to fill member <a class="el" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910" title="Intended usage of memory.">VmaAllocationCreateInfo::usage</a> using one of the values of enum <a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc" title="Intended usage of the allocated memory.">VmaMemoryUsage</a>. It defines high level, common usage types. Since version 3 of the library, it is recommended to use <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a> to let it select best memory type for your resource automatically.</p>
<p>For example, if you want to create a uniform buffer that will be filled using transfer only once or infrequently and then used for rendering every frame as a uniform buffer, you can do it using following code. The buffer will most likely end up in a memory type with <code>VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT</code> to be fast to access by the GPU device.</p>
<div class="fragment"><div class="line">VkBufferCreateInfo bufferInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">bufferInfo.size = 65536;</div>
<div class="line">bufferInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocInfo = {};</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer buffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufferInfo, &amp;allocInfo, &amp;buffer, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_gac72ee55598617e8eecca384e746bab51"><div class="ttname"><a href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a></div><div class="ttdeci">VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Creates a new VkBuffer, allocates and binds memory for it.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e"><div class="ttname"><a href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a></div><div class="ttdeci">@ VMA_MEMORY_USAGE_AUTO</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:527</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_accb8b06b1f677d858cb9af20705fa910"><div class="ttname"><a href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo::usage</a></div><div class="ttdeci">VmaMemoryUsage usage</div><div class="ttdoc">Intended usage of memory.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1271</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
</div><!-- fragment --><p>If you have a preference for putting the resource in GPU (device) memory or CPU (host) memory on systems with discrete graphics card that have the memories separate, you can use <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305ccae2adb696d6a73c18bb20c23666661327">VMA_MEMORY_USAGE_AUTO_PREFER_DEVICE</a> or <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca9b422585242160b8ed3418310ee6664d">VMA_MEMORY_USAGE_AUTO_PREFER_HOST</a>.</p>
<p>When using <code>VMA_MEMORY_USAGE_AUTO*</code> while you want to map the allocated memory, you also need to specify one of the host access flags: <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a> or <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a>. This will help the library decide about preferred memory type to ensure it has <code>VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT</code> so you can map it.</p>
<p>For example, a staging buffer that will be filled via mapped pointer and then used as a source of transfer to the buffer described previously can be created like this. It will likely end up in a memory type that is <code>HOST_VISIBLE</code> and <code>HOST_COHERENT</code> but not <code>HOST_CACHED</code> (meaning uncached, write-combined) and not <code>DEVICE_LOCAL</code> (meaning system RAM).</p>
<div class="fragment"><div class="line">VkBufferCreateInfo stagingBufferInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">stagingBufferInfo.size = 65536;</div>
<div class="line">stagingBufferInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> stagingAllocInfo = {};</div>
<div class="line">stagingAllocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line">stagingAllocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">flags</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer stagingBuffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> stagingAllocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;stagingBufferInfo, &amp;stagingAllocInfo, &amp;stagingBuffer, &amp;stagingAllocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:636</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_add09658ac14fe290ace25470ddd6d41b"><div class="ttname"><a href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">VmaAllocationCreateInfo::flags</a></div><div class="ttdeci">VmaAllocationCreateFlags flags</div><div class="ttdoc">Use VmaAllocationCreateFlagBits enum.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1265</div></div>
</div><!-- fragment --><p>For more examples of creating different kinds of resources, see chapter <a class="el" href="usage_patterns.html">Recommended usage patterns</a>. See also: <a class="el" href="memory_mapping.html">Memory mapping</a>.</p>
<p>Usage values <code>VMA_MEMORY_USAGE_AUTO*</code> are legal to use only when the library knows about the resource being created by having <code>VkBufferCreateInfo</code> / <code>VkImageCreateInfo</code> passed, so they work with functions like: <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51" title="Creates a new VkBuffer, allocates and binds memory for it.">vmaCreateBuffer()</a>, <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>, <a class="el" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888" title="Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndexForBufferInfo()</a> etc. If you allocate raw memory using function <a class="el" href="group__group__alloc.html#gabf28077dbf82d0908b8acbe8ee8dd9b8" title="General purpose memory allocation.">vmaAllocateMemory()</a>, you have to use other means of selecting memory type, as described below.</p>
<dl class="section note"><dt>Note</dt><dd>Old usage values (<code>VMA_MEMORY_USAGE_GPU_ONLY</code>, <code>VMA_MEMORY_USAGE_CPU_ONLY</code>, <code>VMA_MEMORY_USAGE_CPU_TO_GPU</code>, <code>VMA_MEMORY_USAGE_GPU_TO_CPU</code>, <code>VMA_MEMORY_USAGE_CPU_COPY</code>) are still available and work same way as in previous versions of the library for backward compatibility, but they are deprecated.</dd></dl>
<h1><a class="anchor" id="choosing_memory_type_required_preferred_flags"></a>
Required and preferred flags</h1>
<p>You can specify more detailed requirements by filling members <a class="el" href="struct_vma_allocation_create_info.html#a9166390303ff42d783305bc31c2b6b90" title="Flags that must be set in a Memory Type chosen for an allocation.">VmaAllocationCreateInfo::requiredFlags</a> and <a class="el" href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d" title="Flags that preferably should be set in a memory type chosen for an allocation.">VmaAllocationCreateInfo::preferredFlags</a> with a combination of bits from enum <code>VkMemoryPropertyFlags</code>. For example, if you want to create a buffer that will be persistently mapped on host (so it must be <code>HOST_VISIBLE</code>) and preferably will also be <code>HOST_COHERENT</code> and <code>HOST_CACHED</code>, use following code:</p>
<div class="fragment"><div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocInfo = {};</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a9166390303ff42d783305bc31c2b6b90">requiredFlags</a> = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">preferredFlags</a> = VK_MEMORY_PROPERTY_HOST_COHERENT_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT;</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">flags</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a> | <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f">VMA_ALLOCATION_CREATE_MAPPED_BIT</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer buffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufferInfo, &amp;allocInfo, &amp;buffer, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f">VMA_ALLOCATION_CREATE_MAPPED_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_MAPPED_BIT</div><div class="ttdoc">Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:587</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:648</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a7fe8d81a1ad10b2a2faacacee5b15d6d"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">VmaAllocationCreateInfo::preferredFlags</a></div><div class="ttdeci">VkMemoryPropertyFlags preferredFlags</div><div class="ttdoc">Flags that preferably should be set in a memory type chosen for an allocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1281</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a9166390303ff42d783305bc31c2b6b90"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a9166390303ff42d783305bc31c2b6b90">VmaAllocationCreateInfo::requiredFlags</a></div><div class="ttdeci">VkMemoryPropertyFlags requiredFlags</div><div class="ttdoc">Flags that must be set in a Memory Type chosen for an allocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1276</div></div>
</div><!-- fragment --><p>A memory type is chosen that has all the required flags and as many preferred flags set as possible.</p>
<p>Value passed in <a class="el" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910" title="Intended usage of memory.">VmaAllocationCreateInfo::usage</a> is internally converted to a set of required and preferred flags, plus some extra "magic" (heuristics).</p>
<h1><a class="anchor" id="choosing_memory_type_explicit_memory_types"></a>
Explicit memory types</h1>
<p>If you inspected memory types available on the physical device and <b>you have a preference for memory types that you want to use</b>, you can fill member <a class="el" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055" title="Bitmask containing one bit set for every memory type acceptable for this allocation.">VmaAllocationCreateInfo::memoryTypeBits</a>. It is a bit mask, where each bit set means that a memory type with that index is allowed to be used for the allocation. Special value 0, just like <code>UINT32_MAX</code>, means there are no restrictions to memory type index.</p>
<p>Please note that this member is NOT just a memory type index. Still you can use it to choose just one, specific memory type. For example, if you already determined that your buffer should be created in memory type 2, use following code:</p>
<div class="fragment"><div class="line">uint32_t memoryTypeIndex = 2;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocInfo = {};</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055">memoryTypeBits</a> = 1u &lt;&lt; memoryTypeIndex;</div>
<div class="line"> </div>
<div class="line">VkBuffer buffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufferInfo, &amp;allocInfo, &amp;buffer, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a3bf940c0271d85d6ba32a4d820075055"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055">VmaAllocationCreateInfo::memoryTypeBits</a></div><div class="ttdeci">uint32_t memoryTypeBits</div><div class="ttdoc">Bitmask containing one bit set for every memory type acceptable for this allocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1289</div></div>
</div><!-- fragment --><p>You can also use this parameter to <b>exclude some memory types</b>. If you inspect memory heaps and types available on the current physical device and you determine that for some reason you don't want to use a specific memory type for the allocation, you can enable automatic memory type selection but exclude certain memory type or types by setting all bits of <code>memoryTypeBits</code> to 1 except the ones you choose.</p>
<div class="fragment"><div class="line"><span class="comment">// ...</span></div>
<div class="line">uint32_t excludedMemoryTypeIndex = 2;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocInfo = {};</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055">memoryTypeBits</a> = ~(1u &lt;&lt; excludedMemoryTypeIndex);</div>
<div class="line"><span class="comment">// ...</span></div>
</div><!-- fragment --><h1><a class="anchor" id="choosing_memory_type_custom_memory_pools"></a>
Custom memory pools</h1>
<p>If you allocate from custom memory pool, all the ways of specifying memory requirements described above are not applicable and the aforementioned members of <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> structure are ignored. Memory type is selected explicitly when creating the pool and then used to make all the allocations from that pool. For further details, see <a class="el" href="custom_memory_pools.html">Custom memory pools</a>.</p>
<h1><a class="anchor" id="choosing_memory_type_dedicated_allocations"></a>
Dedicated allocations</h1>
<p>Memory for allocations is reserved out of larger block of <code>VkDeviceMemory</code> allocated from Vulkan internally. That is the main feature of this whole library. You can still request a separate memory block to be created for an allocation, just like you would do in a trivial solution without using any allocator. In that case, a buffer or image is always bound to that memory at offset 0. This is called a "dedicated allocation". You can explicitly request it by using flag <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a>. The library can also internally decide to use dedicated allocation in some cases, e.g.:</p>
<ul>
<li>When the size of the allocation is large.</li>
<li>When <a class="el" href="vk_khr_dedicated_allocation.html">VK_KHR_dedicated_allocation</a> extension is enabled and it reports that dedicated allocation is required or recommended for the resource.</li>
<li>When allocation of next big memory block fails due to not enough device memory, but allocation with the exact requested size succeeds. </li>
</ul>
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<div class="textblock"><p>Please check "CONFIGURATION SECTION" in the code to find macros that you can define before each include of this file or change directly in this file to provide your own implementation of basic facilities like assert, <code>min()</code> and <code>max()</code> functions, mutex, atomic etc. The library uses its own implementation of containers by default, but you can switch to using STL containers instead.</p>
<p>For example, define <code>VMA_ASSERT(expr)</code> before including the library to provide custom implementation of the assertion, compatible with your project. By default it is defined to standard C <code>assert(expr)</code> in <code>_DEBUG</code> configuration and empty otherwise.</p>
<h1><a class="anchor" id="config_Vulkan_functions"></a>
Pointers to Vulkan functions</h1>
<p>There are multiple ways to import pointers to Vulkan functions in the library. In the simplest case you don't need to do anything. If the compilation or linking of your program or the initialization of the <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> doesn't work for you, you can try to reconfigure it.</p>
<p>First, the allocator tries to fetch pointers to Vulkan functions linked statically, like this:</p>
<div class="fragment"><div class="line">m_VulkanFunctions.vkAllocateMemory = (PFN_vkAllocateMemory)vkAllocateMemory;</div>
</div><!-- fragment --><p>If you want to disable this feature, set configuration macro: <code>#define VMA_STATIC_VULKAN_FUNCTIONS 0</code>.</p>
<p>Second, you can provide the pointers yourself by setting member <a class="el" href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd" title="Pointers to Vulkan functions. Can be null.">VmaAllocatorCreateInfo::pVulkanFunctions</a>. You can fetch them e.g. using functions <code>vkGetInstanceProcAddr</code> and <code>vkGetDeviceProcAddr</code> or by using a helper library like <a href="https://github.com/zeux/volk">volk</a>.</p>
<p>Third, VMA tries to fetch remaining pointers that are still null by calling <code>vkGetInstanceProcAddr</code> and <code>vkGetDeviceProcAddr</code> on its own. You need to only fill in <a class="el" href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849" title="Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.">VmaVulkanFunctions::vkGetInstanceProcAddr</a> and <a class="el" href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57" title="Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.">VmaVulkanFunctions::vkGetDeviceProcAddr</a>. Other pointers will be fetched automatically. If you want to disable this feature, set configuration macro: <code>#define VMA_DYNAMIC_VULKAN_FUNCTIONS 0</code>.</p>
<p>Finally, all the function pointers required by the library (considering selected Vulkan version and enabled extensions) are checked with <code>VMA_ASSERT</code> if they are not null.</p>
<h1><a class="anchor" id="custom_memory_allocator"></a>
Custom host memory allocator</h1>
<p>If you use custom allocator for CPU memory rather than default operator <code>new</code> and <code>delete</code> from C++, you can make this library using your allocator as well by filling optional member <a class="el" href="struct_vma_allocator_create_info.html#a6e409087e3be55400d0e4ccbe43c608d" title="Custom CPU memory allocation callbacks. Optional.">VmaAllocatorCreateInfo::pAllocationCallbacks</a>. These functions will be passed to Vulkan, as well as used by the library itself to make any CPU-side allocations.</p>
<h1><a class="anchor" id="allocation_callbacks"></a>
Device memory allocation callbacks</h1>
<p>The library makes calls to <code>vkAllocateMemory()</code> and <code>vkFreeMemory()</code> internally. You can setup callbacks to be informed about these calls, e.g. for the purpose of gathering some statistics. To do it, fill optional member <a class="el" href="struct_vma_allocator_create_info.html#af1380969b5e1ea4c3184a877892d260e" title="Informative callbacks for vkAllocateMemory, vkFreeMemory. Optional.">VmaAllocatorCreateInfo::pDeviceMemoryCallbacks</a>.</p>
<h1><a class="anchor" id="heap_memory_limit"></a>
Device heap memory limit</h1>
<p>When device memory of certain heap runs out of free space, new allocations may fail (returning error code) or they may succeed, silently pushing some existing_ memory blocks from GPU VRAM to system RAM (which degrades performance). This behavior is implementation-dependent - it depends on GPU vendor and graphics driver.</p>
<p>On AMD cards it can be controlled while creating Vulkan device object by using VK_AMD_memory_overallocation_behavior extension, if available.</p>
<p>Alternatively, if you want to test how your program behaves with limited amount of Vulkan device memory available without switching your graphics card to one that really has smaller VRAM, you can use a feature of this library intended for this purpose. To do it, fill optional member <a class="el" href="struct_vma_allocator_create_info.html#a31c192aa6cbffa33279f6d9f0c47c44b" title="Either null or a pointer to an array of limits on maximum number of bytes that can be allocated out o...">VmaAllocatorCreateInfo::pHeapSizeLimit</a>. </p>
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<div class="headertitle"><div class="title">Custom memory pools</div></div>
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<div class="textblock"><p>A memory pool contains a number of <code>VkDeviceMemory</code> blocks. The library automatically creates and manages default pool for each memory type available on the device. Default memory pool automatically grows in size. Size of allocated blocks is also variable and managed automatically. You are using default pools whenever you leave <a class="el" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150" title="Pool that this allocation should be created in.">VmaAllocationCreateInfo::pool</a> = null.</p>
<p>You can create custom pool and allocate memory out of it. It can be useful if you want to:</p>
<ul>
<li>Keep certain kind of allocations separate from others.</li>
<li>Enforce particular, fixed size of Vulkan memory blocks.</li>
<li>Limit maximum amount of Vulkan memory allocated for that pool.</li>
<li>Reserve minimum or fixed amount of Vulkan memory always preallocated for that pool.</li>
<li>Use extra parameters for a set of your allocations that are available in <a class="el" href="struct_vma_pool_create_info.html" title="Describes parameter of created VmaPool.">VmaPoolCreateInfo</a> but not in <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> - e.g., custom minimum alignment, custom <code>pNext</code> chain.</li>
<li>Perform defragmentation on a specific subset of your allocations.</li>
</ul>
<p>To use custom memory pools:</p>
<ol type="1">
<li>Fill <a class="el" href="struct_vma_pool_create_info.html" title="Describes parameter of created VmaPool.">VmaPoolCreateInfo</a> structure.</li>
<li>Call <a class="el" href="group__group__alloc.html#ga5c8770ded7c59c8caac6de0c2cb00b50" title="Allocates Vulkan device memory and creates VmaPool object.">vmaCreatePool()</a> to obtain <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> handle.</li>
<li>When making an allocation, set <a class="el" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150" title="Pool that this allocation should be created in.">VmaAllocationCreateInfo::pool</a> to this handle. You don't need to specify any other parameters of this structure, like <code>usage</code>.</li>
</ol>
<p>Example:</p>
<div class="fragment"><div class="line"><span class="comment">// Find memoryTypeIndex for the pool.</span></div>
<div class="line">VkBufferCreateInfo sampleBufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">sampleBufCreateInfo.size = 0x10000; <span class="comment">// Doesn&#39;t matter.</span></div>
<div class="line">sampleBufCreateInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> sampleAllocCreateInfo = {};</div>
<div class="line">sampleAllocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line"> </div>
<div class="line">uint32_t memTypeIndex;</div>
<div class="line">VkResult res = <a class="code hl_function" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888">vmaFindMemoryTypeIndexForBufferInfo</a>(allocator,</div>
<div class="line"> &amp;sampleBufCreateInfo, &amp;sampleAllocCreateInfo, &amp;memTypeIndex);</div>
<div class="line"><span class="comment">// Check res...</span></div>
<div class="line"> </div>
<div class="line"><span class="comment">// Create a pool that can have at most 2 blocks, 128 MiB each.</span></div>
<div class="line"><a class="code hl_struct" href="struct_vma_pool_create_info.html">VmaPoolCreateInfo</a> poolCreateInfo = {};</div>
<div class="line">poolCreateInfo.<a class="code hl_variable" href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319">memoryTypeIndex</a> = memTypeIndex;</div>
<div class="line">poolCreateInfo.<a class="code hl_variable" href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676">blockSize</a> = 128ull * 1024 * 1024;</div>
<div class="line">poolCreateInfo.<a class="code hl_variable" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c">maxBlockCount</a> = 2;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_pool.html">VmaPool</a> pool;</div>
<div class="line">res = <a class="code hl_function" href="group__group__alloc.html#ga5c8770ded7c59c8caac6de0c2cb00b50">vmaCreatePool</a>(allocator, &amp;poolCreateInfo, &amp;pool);</div>
<div class="line"><span class="comment">// Check res...</span></div>
<div class="line"> </div>
<div class="line"><span class="comment">// Allocate a buffer out of it.</span></div>
<div class="line">VkBufferCreateInfo bufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">bufCreateInfo.size = 1024;</div>
<div class="line">bufCreateInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150">pool</a> = pool;</div>
<div class="line"> </div>
<div class="line">VkBuffer buf;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> alloc;</div>
<div class="line">res = <a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufCreateInfo, &amp;allocCreateInfo, &amp;buf, &amp;alloc, <span class="keyword">nullptr</span>);</div>
<div class="line"><span class="comment">// Check res...</span></div>
<div class="ttc" id="agroup__group__alloc_html_ga5c8770ded7c59c8caac6de0c2cb00b50"><div class="ttname"><a href="group__group__alloc.html#ga5c8770ded7c59c8caac6de0c2cb00b50">vmaCreatePool</a></div><div class="ttdeci">VkResult vmaCreatePool(VmaAllocator allocator, const VmaPoolCreateInfo *pCreateInfo, VmaPool *pPool)</div><div class="ttdoc">Allocates Vulkan device memory and creates VmaPool object.</div></div>
<div class="ttc" id="agroup__group__alloc_html_gac72ee55598617e8eecca384e746bab51"><div class="ttname"><a href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a></div><div class="ttdeci">VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Creates a new VkBuffer, allocates and binds memory for it.</div></div>
<div class="ttc" id="agroup__group__alloc_html_gae790ab9ffaf7667fb8f62523e6897888"><div class="ttname"><a href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888">vmaFindMemoryTypeIndexForBufferInfo</a></div><div class="ttdeci">VkResult vmaFindMemoryTypeIndexForBufferInfo(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, uint32_t *pMemoryTypeIndex)</div><div class="ttdoc">Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e"><div class="ttname"><a href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a></div><div class="ttdeci">@ VMA_MEMORY_USAGE_AUTO</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:527</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a6272c0555cfd1fe28bff1afeb6190150"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150">VmaAllocationCreateInfo::pool</a></div><div class="ttdeci">VmaPool pool</div><div class="ttdoc">Pool that this allocation should be created in.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1295</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_accb8b06b1f677d858cb9af20705fa910"><div class="ttname"><a href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo::usage</a></div><div class="ttdeci">VmaMemoryUsage usage</div><div class="ttdoc">Intended usage of memory.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1271</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
<div class="ttc" id="astruct_vma_pool_create_info_html"><div class="ttname"><a href="struct_vma_pool_create_info.html">VmaPoolCreateInfo</a></div><div class="ttdoc">Describes parameter of created VmaPool.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1314</div></div>
<div class="ttc" id="astruct_vma_pool_create_info_html_a596fa76b685d3f1f688f84a709a5b319"><div class="ttname"><a href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319">VmaPoolCreateInfo::memoryTypeIndex</a></div><div class="ttdeci">uint32_t memoryTypeIndex</div><div class="ttdoc">Vulkan memory type index to allocate this pool from.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1317</div></div>
<div class="ttc" id="astruct_vma_pool_create_info_html_aa4265160536cdb9be821b7686c16c676"><div class="ttname"><a href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676">VmaPoolCreateInfo::blockSize</a></div><div class="ttdeci">VkDeviceSize blockSize</div><div class="ttdoc">Size of a single VkDeviceMemory block to be allocated as part of this pool, in bytes....</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1330</div></div>
<div class="ttc" id="astruct_vma_pool_create_info_html_ae41142f2834fcdc82baa4883c187b75c"><div class="ttname"><a href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c">VmaPoolCreateInfo::maxBlockCount</a></div><div class="ttdeci">size_t maxBlockCount</div><div class="ttdoc">Maximum number of blocks that can be allocated in this pool. Optional.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1343</div></div>
<div class="ttc" id="astruct_vma_pool_html"><div class="ttname"><a href="struct_vma_pool.html">VmaPool</a></div><div class="ttdoc">Represents custom memory pool.</div></div>
</div><!-- fragment --><p>You have to free all allocations made from this pool before destroying it.</p>
<div class="fragment"><div class="line"><a class="code hl_function" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a>(allocator, buf, alloc);</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga5485779c8f1948238fc4e92232fa65e1">vmaDestroyPool</a>(allocator, pool);</div>
<div class="ttc" id="agroup__group__alloc_html_ga0d9f4e4ba5bf9aab1f1c746387753d77"><div class="ttname"><a href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a></div><div class="ttdeci">void vmaDestroyBuffer(VmaAllocator allocator, VkBuffer buffer, VmaAllocation allocation)</div><div class="ttdoc">Destroys Vulkan buffer and frees allocated memory.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ga5485779c8f1948238fc4e92232fa65e1"><div class="ttname"><a href="group__group__alloc.html#ga5485779c8f1948238fc4e92232fa65e1">vmaDestroyPool</a></div><div class="ttdeci">void vmaDestroyPool(VmaAllocator allocator, VmaPool pool)</div><div class="ttdoc">Destroys VmaPool object and frees Vulkan device memory.</div></div>
</div><!-- fragment --><p>New versions of this library support creating dedicated allocations in custom pools. It is supported only when <a class="el" href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676" title="Size of a single VkDeviceMemory block to be allocated as part of this pool, in bytes....">VmaPoolCreateInfo::blockSize</a> = 0. To use this feature, set <a class="el" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150" title="Pool that this allocation should be created in.">VmaAllocationCreateInfo::pool</a> to the pointer to your custom pool and <a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b" title="Use VmaAllocationCreateFlagBits enum.">VmaAllocationCreateInfo::flags</a> to <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a>.</p>
<h1><a class="anchor" id="custom_memory_pools_MemTypeIndex"></a>
Choosing memory type index</h1>
<p>When creating a pool, you must explicitly specify memory type index. To find the one suitable for your buffers or images, you can use helper functions <a class="el" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888" title="Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndexForBufferInfo()</a>, <a class="el" href="group__group__alloc.html#ga088da83d8eaf3ce9056d9ea0b981d472" title="Helps to find memoryTypeIndex, given VkImageCreateInfo and VmaAllocationCreateInfo.">vmaFindMemoryTypeIndexForImageInfo()</a>. You need to provide structures with example parameters of buffers or images that you are going to create in that pool.</p>
<div class="fragment"><div class="line">VkBufferCreateInfo exampleBufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">exampleBufCreateInfo.size = 1024; <span class="comment">// Doesn&#39;t matter</span></div>
<div class="line">exampleBufCreateInfo.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line"> </div>
<div class="line">uint32_t memTypeIndex;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888">vmaFindMemoryTypeIndexForBufferInfo</a>(allocator, &amp;exampleBufCreateInfo, &amp;allocCreateInfo, &amp;memTypeIndex);</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_pool_create_info.html">VmaPoolCreateInfo</a> poolCreateInfo = {};</div>
<div class="line">poolCreateInfo.<a class="code hl_variable" href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319">memoryTypeIndex</a> = memTypeIndex;</div>
<div class="line"><span class="comment">// ...</span></div>
</div><!-- fragment --><p>When creating buffers/images allocated in that pool, provide following parameters:</p>
<ul>
<li><code>VkBufferCreateInfo</code>: Prefer to pass same parameters as above. Otherwise you risk creating resources in a memory type that is not suitable for them, which may result in undefined behavior. Using different <code>VK_BUFFER_USAGE_</code> flags may work, but you shouldn't create images in a pool intended for buffers or the other way around.</li>
<li><a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a>: You don't need to pass same parameters. Fill only <code>pool</code> member. Other members are ignored anyway.</li>
</ul>
<h1><a class="anchor" id="custom_memory_pools_when_not_use"></a>
When not to use custom pools</h1>
<p>Custom pools are commonly overused by VMA users. While it may feel natural to keep some logical groups of resources separate in memory, in most cases it does more harm than good. Using custom pool shouldn't be your first choice. Instead, please make all allocations from default pools first and only use custom pools if you can prove and measure that it is beneficial in some way, e.g. it results in lower memory usage, better performance, etc.</p>
<p>Using custom pools has disadvantages:</p>
<ul>
<li>Each pool has its own collection of <code>VkDeviceMemory</code> blocks. Some of them may be partially or even completely empty. Spreading allocations across multiple pools increases the amount of wasted (allocated but unbound) memory.</li>
<li>You must manually choose specific memory type to be used by a custom pool (set as <a class="el" href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319" title="Vulkan memory type index to allocate this pool from.">VmaPoolCreateInfo::memoryTypeIndex</a>). When using default pools, best memory type for each of your allocations can be selected automatically using a carefully design algorithm that works across all kinds of GPUs.</li>
<li>If an allocation from a custom pool at specific memory type fails, entire allocation operation returns failure. When using default pools, VMA tries another compatible memory type.</li>
<li>If you set <a class="el" href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676" title="Size of a single VkDeviceMemory block to be allocated as part of this pool, in bytes....">VmaPoolCreateInfo::blockSize</a> != 0, each memory block has the same size, while default pools start from small blocks and only allocate next blocks larger and larger up to the preferred block size.</li>
</ul>
<p>Many of the common concerns can be addressed in a different way than using custom pools:</p>
<ul>
<li>If you want to keep your allocations of certain size (small versus large) or certain lifetime (transient versus long lived) separate, you likely don't need to. VMA uses a high quality allocation algorithm that manages memory well in various cases. Please measure and check if using custom pools provides a benefit.</li>
<li>If you want to keep your images and buffers separate, you don't need to. VMA respects <code>bufferImageGranularity</code> limit automatically.</li>
<li>If you want to keep your mapped and not mapped allocations separate, you don't need to. VMA respects <code>nonCoherentAtomSize</code> limit automatically. It also maps only those <code>VkDeviceMemory</code> blocks that need to map any allocation. It even tries to keep mappable and non-mappable allocations in separate blocks to minimize the amount of mapped memory.</li>
<li>If you want to choose a custom size for the default memory block, you can set it globally instead using <a class="el" href="struct_vma_allocator_create_info.html#a8e4714298e3121cdd8b214a1ae7a637a" title="Preferred size of a single VkDeviceMemory block to be allocated from large heaps &gt; 1 GiB....">VmaAllocatorCreateInfo::preferredLargeHeapBlockSize</a>.</li>
<li>If you want to select specific memory type for your allocation, you can set <a class="el" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055" title="Bitmask containing one bit set for every memory type acceptable for this allocation.">VmaAllocationCreateInfo::memoryTypeBits</a> to <code>(1u &lt;&lt; myMemoryTypeIndex)</code> instead.</li>
<li>If you need to create a buffer with certain minimum alignment, you can still do it using default pools with dedicated function <a class="el" href="group__group__alloc.html#gaa06a690013a0d01e60894ac378083834" title="Creates a buffer with additional minimum alignment.">vmaCreateBufferWithAlignment()</a>.</li>
</ul>
<h1><a class="anchor" id="linear_algorithm"></a>
Linear allocation algorithm</h1>
<p>Each Vulkan memory block managed by this library has accompanying metadata that keeps track of used and unused regions. By default, the metadata structure and algorithm tries to find best place for new allocations among free regions to optimize memory usage. This way you can allocate and free objects in any order.</p>
<p><img src="../gfx/Linear_allocator_1_algo_default.png" alt="Default allocation algorithm" class="inline"/></p>
<p>Sometimes there is a need to use simpler, linear allocation algorithm. You can create custom pool that uses such algorithm by adding flag <a class="el" href="group__group__alloc.html#gga9a7c45f9c863695d98c83fa5ac940fe7a13c8a444197c67866be9cb05599fc726" title="Enables alternative, linear allocation algorithm in this pool.">VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT</a> to <a class="el" href="struct_vma_pool_create_info.html#a8405139f63d078340ae74513a59f5446" title="Use combination of VmaPoolCreateFlagBits.">VmaPoolCreateInfo::flags</a> while creating <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> object. Then an alternative metadata management is used. It always creates new allocations after last one and doesn't reuse free regions after allocations freed in the middle. It results in better allocation performance and less memory consumed by metadata.</p>
<p><img src="../gfx/Linear_allocator_2_algo_linear.png" alt="Linear allocation algorithm" class="inline"/></p>
<p>With this one flag, you can create a custom pool that can be used in many ways: free-at-once, stack, double stack, and ring buffer. See below for details. You don't need to specify explicitly which of these options you are going to use - it is detected automatically.</p>
<h2><a class="anchor" id="linear_algorithm_free_at_once"></a>
Free-at-once</h2>
<p>In a pool that uses linear algorithm, you still need to free all the allocations individually, e.g. by using <a class="el" href="group__group__alloc.html#ga5fea5518972ae9094b1526cbcb19b05f" title="Frees memory previously allocated using vmaAllocateMemory(), vmaAllocateMemoryForBuffer(),...">vmaFreeMemory()</a> or <a class="el" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77" title="Destroys Vulkan buffer and frees allocated memory.">vmaDestroyBuffer()</a>. You can free them in any order. New allocations are always made after last one - free space in the middle is not reused. However, when you release all the allocation and the pool becomes empty, allocation starts from the beginning again. This way you can use linear algorithm to speed up creation of allocations that you are going to release all at once.</p>
<p><img src="../gfx/Linear_allocator_3_free_at_once.png" alt="Free-at-once" class="inline"/></p>
<p>This mode is also available for pools created with <a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c" title="Maximum number of blocks that can be allocated in this pool. Optional.">VmaPoolCreateInfo::maxBlockCount</a> value that allows multiple memory blocks.</p>
<h2><a class="anchor" id="linear_algorithm_stack"></a>
Stack</h2>
<p>When you free an allocation that was created last, its space can be reused. Thanks to this, if you always release allocations in the order opposite to their creation (LIFO - Last In First Out), you can achieve behavior of a stack.</p>
<p><img src="../gfx/Linear_allocator_4_stack.png" alt="Stack" class="inline"/></p>
<p>This mode is also available for pools created with <a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c" title="Maximum number of blocks that can be allocated in this pool. Optional.">VmaPoolCreateInfo::maxBlockCount</a> value that allows multiple memory blocks.</p>
<h2><a class="anchor" id="linear_algorithm_double_stack"></a>
Double stack</h2>
<p>The space reserved by a custom pool with linear algorithm may be used by two stacks:</p>
<ul>
<li>First, default one, growing up from offset 0.</li>
<li>Second, "upper" one, growing down from the end towards lower offsets.</li>
</ul>
<p>To make allocation from the upper stack, add flag <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a42ba3a2d2c7117953210b7c3ef8da0df">VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT</a> to <a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b" title="Use VmaAllocationCreateFlagBits enum.">VmaAllocationCreateInfo::flags</a>.</p>
<p><img src="../gfx/Linear_allocator_7_double_stack.png" alt="Double stack" class="inline"/></p>
<p>Double stack is available only in pools with one memory block - <a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c" title="Maximum number of blocks that can be allocated in this pool. Optional.">VmaPoolCreateInfo::maxBlockCount</a> must be 1. Otherwise behavior is undefined.</p>
<p>When the two stacks' ends meet so there is not enough space between them for a new allocation, such allocation fails with usual <code>VK_ERROR_OUT_OF_DEVICE_MEMORY</code> error.</p>
<h2><a class="anchor" id="linear_algorithm_ring_buffer"></a>
Ring buffer</h2>
<p>When you free some allocations from the beginning and there is not enough free space for a new one at the end of a pool, allocator's "cursor" wraps around to the beginning and starts allocation there. Thanks to this, if you always release allocations in the same order as you created them (FIFO - First In First Out), you can achieve behavior of a ring buffer / queue.</p>
<p><img src="../gfx/Linear_allocator_5_ring_buffer.png" alt="Ring buffer" class="inline"/></p>
<p>Ring buffer is available only in pools with one memory block - <a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c" title="Maximum number of blocks that can be allocated in this pool. Optional.">VmaPoolCreateInfo::maxBlockCount</a> must be 1. Otherwise behavior is undefined.</p>
<dl class="section note"><dt>Note</dt><dd><a class="el" href="defragmentation.html">Defragmentation</a> is not supported in custom pools created with <a class="el" href="group__group__alloc.html#gga9a7c45f9c863695d98c83fa5ac940fe7a13c8a444197c67866be9cb05599fc726" title="Enables alternative, linear allocation algorithm in this pool.">VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT</a>. </dd></dl>
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<div class="headertitle"><div class="title">Debugging incorrect memory usage</div></div>
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<div class="textblock"><p>If you suspect a bug with memory usage, like usage of uninitialized memory or memory being overwritten out of bounds of an allocation, you can use debug features of this library to verify this.</p>
<h1><a class="anchor" id="debugging_memory_usage_initialization"></a>
Memory initialization</h1>
<p>If you experience a bug with incorrect and nondeterministic data in your program and you suspect uninitialized memory to be used, you can enable automatic memory initialization to verify this. To do it, define macro <code>VMA_DEBUG_INITIALIZE_ALLOCATIONS</code> to 1.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_DEBUG_INITIALIZE_ALLOCATIONS 1</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
<div class="ttc" id="avk__mem__alloc_8h_html"><div class="ttname"><a href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a></div></div>
</div><!-- fragment --><p>It makes memory of new allocations initialized to bit pattern <code>0xDCDCDCDC</code>. Before an allocation is destroyed, its memory is filled with bit pattern <code>0xEFEFEFEF</code>. Memory is automatically mapped and unmapped if necessary.</p>
<p>If you find these values while debugging your program, good chances are that you incorrectly read Vulkan memory that is allocated but not initialized, or already freed, respectively.</p>
<p>Memory initialization works only with memory types that are <code>HOST_VISIBLE</code> and with allocations that can be mapped. It works also with dedicated allocations.</p>
<h1><a class="anchor" id="debugging_memory_usage_margins"></a>
Margins</h1>
<p>By default, allocations are laid out in memory blocks next to each other if possible (considering required alignment, <code>bufferImageGranularity</code>, and <code>nonCoherentAtomSize</code>).</p>
<p><img src="../gfx/Margins_1.png" alt="Allocations without margin" class="inline"/></p>
<p>Define macro <code>VMA_DEBUG_MARGIN</code> to some non-zero value (e.g. 16) to enforce specified number of bytes as a margin after every allocation.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_DEBUG_MARGIN 16</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
</div><!-- fragment --><p><img src="../gfx/Margins_2.png" alt="Allocations with margin" class="inline"/></p>
<p>If your bug goes away after enabling margins, it means it may be caused by memory being overwritten outside of allocation boundaries. It is not 100% certain though. Change in application behavior may also be caused by different order and distribution of allocations across memory blocks after margins are applied.</p>
<p>Margins work with all types of memory.</p>
<p>Margin is applied only to allocations made out of memory blocks and not to dedicated allocations, which have their own memory block of specific size. It is thus not applied to allocations made using <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a> flag or those automatically decided to put into dedicated allocations, e.g. due to its large size or recommended by VK_KHR_dedicated_allocation extension.</p>
<p>Margins appear in <a class="el" href="statistics.html#statistics_json_dump">JSON dump</a> as part of free space.</p>
<p>Note that enabling margins increases memory usage and fragmentation.</p>
<p>Margins do not apply to <a class="el" href="virtual_allocator.html">Virtual allocator</a>.</p>
<h1><a class="anchor" id="debugging_memory_usage_corruption_detection"></a>
Corruption detection</h1>
<p>You can additionally define macro <code>VMA_DEBUG_DETECT_CORRUPTION</code> to 1 to enable validation of contents of the margins.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_DEBUG_MARGIN 16</span></div>
<div class="line"><span class="preprocessor">#define VMA_DEBUG_DETECT_CORRUPTION 1</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
</div><!-- fragment --><p>When this feature is enabled, number of bytes specified as <code>VMA_DEBUG_MARGIN</code> (it must be multiply of 4) after every allocation is filled with a magic number. This idea is also know as "canary". Memory is automatically mapped and unmapped if necessary.</p>
<p>This number is validated automatically when the allocation is destroyed. If it is not equal to the expected value, <code>VMA_ASSERT()</code> is executed. It clearly means that either CPU or GPU overwritten the memory outside of boundaries of the allocation, which indicates a serious bug.</p>
<p>You can also explicitly request checking margins of all allocations in all memory blocks that belong to specified memory types by using function <a class="el" href="group__group__alloc.html#ga49329a7f030dafcf82f7b73334c22e98" title="Checks magic number in margins around all allocations in given memory types (in both default and cust...">vmaCheckCorruption()</a>, or in memory blocks that belong to specified custom pool, by using function <a class="el" href="group__group__alloc.html#gad535935619c7a549bf837e1bb0068f89" title="Checks magic number in margins around all allocations in given memory pool in search for corruptions.">vmaCheckPoolCorruption()</a>.</p>
<p>Margin validation (corruption detection) works only for memory types that are <code>HOST_VISIBLE</code> and <code>HOST_COHERENT</code>.</p>
<h1><a class="anchor" id="debugging_memory_usage_leak_detection"></a>
Leak detection features</h1>
<p>At allocation and allocator destruction time VMA checks for unfreed and unmapped blocks using <code>VMA_ASSERT_LEAK()</code>. This macro defaults to an assertion, triggering a typically fatal error in Debug builds, and doing nothing in Release builds. You can provide your own definition of <code>VMA_ASSERT_LEAK()</code> to change this behavior.</p>
<p>At memory block destruction time VMA lists out all unfreed allocations using the <code>VMA_LEAK_LOG_FORMAT()</code> macro, which defaults to <code>VMA_DEBUG_LOG_FORMAT</code>, which in turn defaults to a no-op. If you're having trouble with leaks - for example, the aforementioned assertion triggers, but you don't quite know <em>why</em> -, overriding this macro to print out the the leaking blocks, combined with assigning individual names to allocations using <a class="el" href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc" title="Sets pName in given allocation to new value.">vmaSetAllocationName()</a>, can greatly aid in fixing them. </p>
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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="headertitle"><div class="title">Defragmentation</div></div>
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<div class="textblock"><p>Interleaved allocations and deallocations of many objects of varying size can cause fragmentation over time, which can lead to a situation where the library is unable to find a continuous range of free memory for a new allocation despite there is enough free space, just scattered across many small free ranges between existing allocations.</p>
<p>To mitigate this problem, you can use defragmentation feature. It doesn't happen automatically though and needs your cooperation, because VMA is a low level library that only allocates memory. It cannot recreate buffers and images in a new place as it doesn't remember the contents of <code>VkBufferCreateInfo</code> / <code>VkImageCreateInfo</code> structures. It cannot copy their contents as it doesn't record any commands to a command buffer.</p>
<p>Example:</p>
<div class="fragment"><div class="line"><a class="code hl_struct" href="struct_vma_defragmentation_info.html">VmaDefragmentationInfo</a> defragInfo = {};</div>
<div class="line">defragInfo.<a class="code hl_variable" href="struct_vma_defragmentation_info.html#a18dd2097d8ab2976cdc7dd3e7b978bd4">pool</a> = myPool;</div>
<div class="line">defragInfo.<a class="code hl_variable" href="struct_vma_defragmentation_info.html#a3e23080c978ecf3abb3180f5b2069da7">flags</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50ca2e6469bcf5a094776ceb5d118263f04b">VMA_DEFRAGMENTATION_FLAG_ALGORITHM_FAST_BIT</a>;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_defragmentation_context.html">VmaDefragmentationContext</a> defragCtx;</div>
<div class="line">VkResult res = <a class="code hl_function" href="group__group__alloc.html#gac3335566858b45541fa9c0d7a6bbb57e">vmaBeginDefragmentation</a>(allocator, &amp;defragInfo, &amp;defragCtx);</div>
<div class="line"><span class="comment">// Check res...</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordflow">for</span>(;;)</div>
<div class="line">{</div>
<div class="line"> <a class="code hl_struct" href="struct_vma_defragmentation_pass_move_info.html">VmaDefragmentationPassMoveInfo</a> pass;</div>
<div class="line"> res = <a class="code hl_function" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00">vmaBeginDefragmentationPass</a>(allocator, defragCtx, &amp;pass);</div>
<div class="line"> <span class="keywordflow">if</span>(res == VK_SUCCESS)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(res != VK_INCOMPLETE)</div>
<div class="line"> <span class="comment">// Handle error...</span></div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">for</span>(uint32_t i = 0; i &lt; pass.<a class="code hl_variable" href="struct_vma_defragmentation_pass_move_info.html#a1b3e18c23f9691f35baf183e615c4408">moveCount</a>; ++i)</div>
<div class="line"> {</div>
<div class="line"> <span class="comment">// Inspect pass.pMoves[i].srcAllocation, identify what buffer/image it represents.</span></div>
<div class="line"> <a class="code hl_struct" href="struct_vma_allocation_info.html">VmaAllocationInfo</a> allocInfo;</div>
<div class="line"> <a class="code hl_function" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a>(allocator, pass.<a class="code hl_variable" href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725">pMoves</a>[i].<a class="code hl_variable" href="struct_vma_defragmentation_move.html#a25aa1bb64efc507a49c6cbc50689f862">srcAllocation</a>, &amp;allocInfo);</div>
<div class="line"> MyEngineResourceData* resData = (MyEngineResourceData*)allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">pUserData</a>;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Recreate and bind this buffer/image at: pass.pMoves[i].dstMemory, pass.pMoves[i].dstOffset.</span></div>
<div class="line"> VkImageCreateInfo imgCreateInfo = ...</div>
<div class="line"> VkImage newImg;</div>
<div class="line"> res = vkCreateImage(device, &amp;imgCreateInfo, <span class="keyword">nullptr</span>, &amp;newImg);</div>
<div class="line"> <span class="comment">// Check res...</span></div>
<div class="line"> res = <a class="code hl_function" href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vmaBindImageMemory</a>(allocator, pass.<a class="code hl_variable" href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725">pMoves</a>[i].<a class="code hl_variable" href="struct_vma_defragmentation_move.html#ab65b106adf209acd7313296d1075300e">dstTmpAllocation</a>, newImg);</div>
<div class="line"> <span class="comment">// Check res...</span></div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Issue a vkCmdCopyBuffer/vkCmdCopyImage to copy its content to the new place.</span></div>
<div class="line"> vkCmdCopyImage(cmdBuf, resData-&gt;img, ..., newImg, ...);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Make sure the copy commands finished executing.</span></div>
<div class="line"> vkWaitForFences(...);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Destroy old buffers/images bound with pass.pMoves[i].srcAllocation.</span></div>
<div class="line"> <span class="keywordflow">for</span>(uint32_t i = 0; i &lt; pass.<a class="code hl_variable" href="struct_vma_defragmentation_pass_move_info.html#a1b3e18c23f9691f35baf183e615c4408">moveCount</a>; ++i)</div>
<div class="line"> {</div>
<div class="line"> <span class="comment">// ...</span></div>
<div class="line"> vkDestroyImage(device, resData-&gt;img, <span class="keyword">nullptr</span>);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Update appropriate descriptors to point to the new places...</span></div>
<div class="line"> </div>
<div class="line"> res = <a class="code hl_function" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226">vmaEndDefragmentationPass</a>(allocator, defragCtx, &amp;pass);</div>
<div class="line"> <span class="keywordflow">if</span>(res == VK_SUCCESS)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(res != VK_INCOMPLETE)</div>
<div class="line"> <span class="comment">// Handle error...</span></div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga59f01ca3d53d50b7cca9b442b77a3e87">vmaEndDefragmentation</a>(allocator, defragCtx, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ga3d3ca45799923aa5d138e9e5f9eb2da5"><div class="ttname"><a href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vmaBindImageMemory</a></div><div class="ttdeci">VkResult vmaBindImageMemory(VmaAllocator allocator, VmaAllocation allocation, VkImage image)</div><div class="ttdoc">Binds image to allocation.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ga59f01ca3d53d50b7cca9b442b77a3e87"><div class="ttname"><a href="group__group__alloc.html#ga59f01ca3d53d50b7cca9b442b77a3e87">vmaEndDefragmentation</a></div><div class="ttdeci">void vmaEndDefragmentation(VmaAllocator allocator, VmaDefragmentationContext context, VmaDefragmentationStats *pStats)</div><div class="ttdoc">Ends defragmentation process.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ga86dd08aba8633bfa4ad0df2e76481d8b"><div class="ttname"><a href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a></div><div class="ttdeci">void vmaGetAllocationInfo(VmaAllocator allocator, VmaAllocation allocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Returns current information about specified allocation.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ga980d7da2ce3b1fd5c8b8476bc362cc00"><div class="ttname"><a href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00">vmaBeginDefragmentationPass</a></div><div class="ttdeci">VkResult vmaBeginDefragmentationPass(VmaAllocator allocator, VmaDefragmentationContext context, VmaDefragmentationPassMoveInfo *pPassInfo)</div><div class="ttdoc">Starts single defragmentation pass.</div></div>
<div class="ttc" id="agroup__group__alloc_html_gac3335566858b45541fa9c0d7a6bbb57e"><div class="ttname"><a href="group__group__alloc.html#gac3335566858b45541fa9c0d7a6bbb57e">vmaBeginDefragmentation</a></div><div class="ttdeci">VkResult vmaBeginDefragmentation(VmaAllocator allocator, const VmaDefragmentationInfo *pInfo, VmaDefragmentationContext *pContext)</div><div class="ttdoc">Begins defragmentation process.</div></div>
<div class="ttc" id="agroup__group__alloc_html_gaded05a445742a00718ee766144c5c226"><div class="ttname"><a href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226">vmaEndDefragmentationPass</a></div><div class="ttdeci">VkResult vmaEndDefragmentationPass(VmaAllocator allocator, VmaDefragmentationContext context, VmaDefragmentationPassMoveInfo *pPassInfo)</div><div class="ttdoc">Ends single defragmentation pass.</div></div>
<div class="ttc" id="agroup__group__alloc_html_gga6552a65b71d16f378c6994b3ceaef50ca2e6469bcf5a094776ceb5d118263f04b"><div class="ttname"><a href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50ca2e6469bcf5a094776ceb5d118263f04b">VMA_DEFRAGMENTATION_FLAG_ALGORITHM_FAST_BIT</a></div><div class="ttdeci">@ VMA_DEFRAGMENTATION_FLAG_ALGORITHM_FAST_BIT</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:744</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html"><div class="ttname"><a href="struct_vma_allocation_info.html">VmaAllocationInfo</a></div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1382</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html_adc507656149c04de7ed95d0042ba2a13"><div class="ttname"><a href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">VmaAllocationInfo::pUserData</a></div><div class="ttdeci">void * pUserData</div><div class="ttdoc">Custom general-purpose pointer that was passed as VmaAllocationCreateInfo::pUserData or set using vma...</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1429</div></div>
<div class="ttc" id="astruct_vma_defragmentation_context_html"><div class="ttname"><a href="struct_vma_defragmentation_context.html">VmaDefragmentationContext</a></div><div class="ttdoc">An opaque object that represents started defragmentation process.</div></div>
<div class="ttc" id="astruct_vma_defragmentation_info_html"><div class="ttname"><a href="struct_vma_defragmentation_info.html">VmaDefragmentationInfo</a></div><div class="ttdoc">Parameters for defragmentation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1472</div></div>
<div class="ttc" id="astruct_vma_defragmentation_info_html_a18dd2097d8ab2976cdc7dd3e7b978bd4"><div class="ttname"><a href="struct_vma_defragmentation_info.html#a18dd2097d8ab2976cdc7dd3e7b978bd4">VmaDefragmentationInfo::pool</a></div><div class="ttdeci">VmaPool pool</div><div class="ttdoc">Custom pool to be defragmented.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1479</div></div>
<div class="ttc" id="astruct_vma_defragmentation_info_html_a3e23080c978ecf3abb3180f5b2069da7"><div class="ttname"><a href="struct_vma_defragmentation_info.html#a3e23080c978ecf3abb3180f5b2069da7">VmaDefragmentationInfo::flags</a></div><div class="ttdeci">VmaDefragmentationFlags flags</div><div class="ttdoc">Use combination of VmaDefragmentationFlagBits.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1474</div></div>
<div class="ttc" id="astruct_vma_defragmentation_move_html_a25aa1bb64efc507a49c6cbc50689f862"><div class="ttname"><a href="struct_vma_defragmentation_move.html#a25aa1bb64efc507a49c6cbc50689f862">VmaDefragmentationMove::srcAllocation</a></div><div class="ttdeci">VmaAllocation srcAllocation</div><div class="ttdoc">Allocation that should be moved.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1505</div></div>
<div class="ttc" id="astruct_vma_defragmentation_move_html_ab65b106adf209acd7313296d1075300e"><div class="ttname"><a href="struct_vma_defragmentation_move.html#ab65b106adf209acd7313296d1075300e">VmaDefragmentationMove::dstTmpAllocation</a></div><div class="ttdeci">VmaAllocation dstTmpAllocation</div><div class="ttdoc">Temporary allocation pointing to destination memory that will replace srcAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1512</div></div>
<div class="ttc" id="astruct_vma_defragmentation_pass_move_info_html"><div class="ttname"><a href="struct_vma_defragmentation_pass_move_info.html">VmaDefragmentationPassMoveInfo</a></div><div class="ttdoc">Parameters for incremental defragmentation steps.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1520</div></div>
<div class="ttc" id="astruct_vma_defragmentation_pass_move_info_html_a1b3e18c23f9691f35baf183e615c4408"><div class="ttname"><a href="struct_vma_defragmentation_pass_move_info.html#a1b3e18c23f9691f35baf183e615c4408">VmaDefragmentationPassMoveInfo::moveCount</a></div><div class="ttdeci">uint32_t moveCount</div><div class="ttdoc">Number of elements in the pMoves array.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1522</div></div>
<div class="ttc" id="astruct_vma_defragmentation_pass_move_info_html_adfa7a4994afd9b940e7f1dfaf436a725"><div class="ttname"><a href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725">VmaDefragmentationPassMoveInfo::pMoves</a></div><div class="ttdeci">VmaDefragmentationMove * pMoves</div><div class="ttdoc">Array of moves to be performed by the user in the current defragmentation pass.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1546</div></div>
</div><!-- fragment --><p>Although functions like <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51" title="Creates a new VkBuffer, allocates and binds memory for it.">vmaCreateBuffer()</a>, <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>, <a class="el" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77" title="Destroys Vulkan buffer and frees allocated memory.">vmaDestroyBuffer()</a>, <a class="el" href="group__group__alloc.html#gae50d2cb3b4a3bfd4dd40987234e50e7e" title="Destroys Vulkan image and frees allocated memory.">vmaDestroyImage()</a> create/destroy an allocation and a buffer/image at once, these are just a shortcut for creating the resource, allocating memory, and binding them together. Defragmentation works on memory allocations only. You must handle the rest manually. Defragmentation is an iterative process that should repreat "passes" as long as related functions return <code>VK_INCOMPLETE</code> not <code>VK_SUCCESS</code>. In each pass:</p>
<ol type="1">
<li><a class="el" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00" title="Starts single defragmentation pass.">vmaBeginDefragmentationPass()</a> function call:<ul>
<li>Calculates and returns the list of allocations to be moved in this pass. Note this can be a time-consuming process.</li>
<li>Reserves destination memory for them by creating temporary destination allocations that you can query for their <code>VkDeviceMemory</code> + offset using <a class="el" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b" title="Returns current information about specified allocation.">vmaGetAllocationInfo()</a>.</li>
</ul>
</li>
<li>Inside the pass, <b>you should</b>:<ul>
<li>Inspect the returned list of allocations to be moved.</li>
<li>Create new buffers/images and bind them at the returned destination temporary allocations.</li>
<li>Copy data from source to destination resources if necessary.</li>
<li>Destroy the source buffers/images, but NOT their allocations.</li>
</ul>
</li>
<li><a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226" title="Ends single defragmentation pass.">vmaEndDefragmentationPass()</a> function call:<ul>
<li>Frees the source memory reserved for the allocations that are moved.</li>
<li>Modifies source <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> objects that are moved to point to the destination reserved memory.</li>
<li>Frees <code>VkDeviceMemory</code> blocks that became empty.</li>
</ul>
</li>
</ol>
<p>Unlike in previous iterations of the defragmentation API, there is no list of "movable" allocations passed as a parameter. Defragmentation algorithm tries to move all suitable allocations. You can, however, refuse to move some of them inside a defragmentation pass, by setting <code>pass.pMoves[i].operation</code> to <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2" title="Set this value if you cannot move the allocation. New place reserved at dstTmpAllocation will be free...">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a>. This is not recommended and may result in suboptimal packing of the allocations after defragmentation. If you cannot ensure any allocation can be moved, it is better to keep movable allocations separate in a custom pool.</p>
<p>Inside a pass, for each allocation that should be moved:</p>
<ul>
<li>You should copy its data from the source to the destination place by calling e.g. <code>vkCmdCopyBuffer()</code>, <code>vkCmdCopyImage()</code>.<ul>
<li>You need to make sure these commands finished executing before destroying the source buffers/images and before calling <a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226" title="Ends single defragmentation pass.">vmaEndDefragmentationPass()</a>.</li>
</ul>
</li>
<li>If a resource doesn't contain any meaningful data, e.g. it is a transient color attachment image to be cleared, filled, and used temporarily in each rendering frame, you can just recreate this image without copying its data.</li>
<li>If the resource is in <code>HOST_VISIBLE</code> and <code>HOST_CACHED</code> memory, you can copy its data on the CPU using <code>memcpy()</code>.</li>
<li>If you cannot move the allocation, you can set <code>pass.pMoves[i].operation</code> to <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2" title="Set this value if you cannot move the allocation. New place reserved at dstTmpAllocation will be free...">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a>. This will cancel the move.<ul>
<li><a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226" title="Ends single defragmentation pass.">vmaEndDefragmentationPass()</a> will then free the destination memory not the source memory of the allocation, leaving it unchanged.</li>
</ul>
</li>
<li>If you decide the allocation is unimportant and can be destroyed instead of moved (e.g. it wasn't used for long time), you can set <code>pass.pMoves[i].operation</code> to <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257a9786f8492a9be2c03bd26395e352ab85" title="Set this value if you decide to abandon the allocation and you destroyed the buffer/image....">VMA_DEFRAGMENTATION_MOVE_OPERATION_DESTROY</a>.<ul>
<li><a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226" title="Ends single defragmentation pass.">vmaEndDefragmentationPass()</a> will then free both source and destination memory, and will destroy the source <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> object.</li>
</ul>
</li>
</ul>
<p>You can defragment a specific custom pool by setting <a class="el" href="struct_vma_defragmentation_info.html#a18dd2097d8ab2976cdc7dd3e7b978bd4" title="Custom pool to be defragmented.">VmaDefragmentationInfo::pool</a> (like in the example above) or all the default pools by setting this member to null.</p>
<p>Defragmentation is always performed in each pool separately. Allocations are never moved between different Vulkan memory types. The size of the destination memory reserved for a moved allocation is the same as the original one. Alignment of an allocation as it was determined using <code>vkGetBufferMemoryRequirements()</code> etc. is also respected after defragmentation. Buffers/images should be recreated with the same <code>VkBufferCreateInfo</code> / <code>VkImageCreateInfo</code> parameters as the original ones.</p>
<p>You can perform the defragmentation incrementally to limit the number of allocations and bytes to be moved in each pass, e.g. to call it in sync with render frames and not to experience too big hitches. See members: <a class="el" href="struct_vma_defragmentation_info.html#a637ada77b02179a27fa92290000afac4" title="Maximum numbers of bytes that can be copied during single pass, while moving allocations to different...">VmaDefragmentationInfo::maxBytesPerPass</a>, <a class="el" href="struct_vma_defragmentation_info.html#ac2db29d309bebc4f7d55041416e9694b" title="Maximum number of allocations that can be moved during single pass to a different place.">VmaDefragmentationInfo::maxAllocationsPerPass</a>.</p>
<p>It is also safe to perform the defragmentation asynchronously to render frames and other Vulkan and VMA usage, possibly from multiple threads, with the exception that allocations returned in <a class="el" href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725" title="Array of moves to be performed by the user in the current defragmentation pass.">VmaDefragmentationPassMoveInfo::pMoves</a> shouldn't be destroyed until the defragmentation pass is ended.</p>
<p><b>Mapping</b> is preserved on allocations that are moved during defragmentation. Whether through <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f" title="Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.">VMA_ALLOCATION_CREATE_MAPPED_BIT</a> or <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a>, the allocations are mapped at their new place. Of course, pointer to the mapped data changes, so it needs to be queried using <a class="el" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2" title="Pointer to the beginning of this allocation as mapped data.">VmaAllocationInfo::pMappedData</a>.</p>
<dl class="section note"><dt>Note</dt><dd>Defragmentation is not supported in custom pools created with <a class="el" href="group__group__alloc.html#gga9a7c45f9c863695d98c83fa5ac940fe7a13c8a444197c67866be9cb05599fc726" title="Enables alternative, linear allocation algorithm in this pool.">VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT</a>. </dd></dl>
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<dt>Member <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597aa6f24f821cd6a7c5e4a443f7bf59c520">VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT</a> </dt>
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/*
@licstart The following is the entire license notice for the JavaScript code in this file.
The MIT License (MIT)
Copyright (C) 1997-2020 by Dimitri van Heesch
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* @license-end */

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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="headertitle"><div class="title">Enabling buffer device address</div></div>
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<div class="textblock"><p>Device extension VK_KHR_buffer_device_address allow to fetch raw GPU pointer to a buffer and pass it for usage in a shader code. It has been promoted to core Vulkan 1.2.</p>
<p>If you want to use this feature in connection with VMA, follow these steps:</p>
<h1><a class="anchor" id="enabling_buffer_device_address_initialization"></a>
Initialization</h1>
<p>1) (For Vulkan version &lt; 1.2) Call <code>vkEnumerateDeviceExtensionProperties</code> for the physical device. Check if the extension is supported - if returned array of <code>VkExtensionProperties</code> contains "VK_KHR_buffer_device_address".</p>
<p>2) Call <code>vkGetPhysicalDeviceFeatures2</code> for the physical device instead of old <code>vkGetPhysicalDeviceFeatures</code>. Attach additional structure <code>VkPhysicalDeviceBufferDeviceAddressFeatures*</code> to <code>VkPhysicalDeviceFeatures2::pNext</code> to be returned. Check if the device feature is really supported - check if <code>VkPhysicalDeviceBufferDeviceAddressFeatures::bufferDeviceAddress</code> is true.</p>
<p>3) (For Vulkan version &lt; 1.2) While creating device with <code>vkCreateDevice</code>, enable this extension - add "VK_KHR_buffer_device_address" to the list passed as <code>VkDeviceCreateInfo::ppEnabledExtensionNames</code>.</p>
<p>4) While creating the device, also don't set <code>VkDeviceCreateInfo::pEnabledFeatures</code>. Fill in <code>VkPhysicalDeviceFeatures2</code> structure instead and pass it as <code>VkDeviceCreateInfo::pNext</code>. Enable this device feature - attach additional structure <code>VkPhysicalDeviceBufferDeviceAddressFeatures*</code> to <code>VkPhysicalDeviceFeatures2::pNext</code> and set its member <code>bufferDeviceAddress</code> to <code>VK_TRUE</code>.</p>
<p>5) While creating <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> with <a class="el" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb" title="Creates VmaAllocator object.">vmaCreateAllocator()</a> inform VMA that you have enabled this feature - add <a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca5f1b28b0414319d1687e1f2b30ab0089">VMA_ALLOCATOR_CREATE_BUFFER_DEVICE_ADDRESS_BIT</a> to <a class="el" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346" title="Flags for created allocator. Use VmaAllocatorCreateFlagBits enum.">VmaAllocatorCreateInfo::flags</a>.</p>
<h1><a class="anchor" id="enabling_buffer_device_address_usage"></a>
Usage</h1>
<p>After following steps described above, you can create buffers with <code>VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT*</code> using VMA. The library automatically adds <code>VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT*</code> to allocated memory blocks wherever it might be needed.</p>
<p>Please note that the library supports only <code>VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT*</code>. The second part of this functionality related to "capture and replay" is not supported, as it is intended for usage in debugging tools like RenderDoc, not in everyday Vulkan usage.</p>
<h1><a class="anchor" id="enabling_buffer_device_address_more_information"></a>
More information</h1>
<p>To learn more about this extension, see <a href="https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/chap46.html#VK_KHR_buffer_device_address">VK_KHR_buffer_device_address in Vulkan specification</a></p>
<p>Example use of this extension can be found in the code of the sample and test suite accompanying this library. </p>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div class="contents">
<div class="textblock">Here is a list of all class members with links to the classes they belong to:</div>
<h3><a id="index_a" name="index_a"></a>- a -</h3><ul>
<li>alignment&#160;:&#160;<a class="el" href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821">VmaVirtualAllocationCreateInfo</a></li>
<li>allocationBytes&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">VmaStatistics</a></li>
<li>allocationCount&#160;:&#160;<a class="el" href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">VmaStatistics</a></li>
<li>allocationInfo&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#a315218ac1206a05026c95e06a8bbd6d5">VmaAllocationInfo2</a></li>
<li>allocationSizeMax&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a06b2add24eed3449a66ff151979a0201">VmaDetailedStatistics</a></li>
<li>allocationSizeMin&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a6fb397e7487e10f2a52e241577d2a2b8">VmaDetailedStatistics</a></li>
<li>allocationsMoved&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#aefeabf130022008eadd75999478af3f9">VmaDefragmentationStats</a></li>
</ul>
<h3><a id="index_b" name="index_b"></a>- b -</h3><ul>
<li>blockBytes&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a2afbc1c7aa8ad7bbb8de06215ba7e5c4">VmaStatistics</a></li>
<li>blockCount&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a309179d5853a6a7cd534df497ee43957">VmaStatistics</a></li>
<li>blockSize&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#aae839de16b3a62cc42c69df378e8e3a2">VmaAllocationInfo2</a>, <a class="el" href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676">VmaPoolCreateInfo</a></li>
<li>budget&#160;:&#160;<a class="el" href="struct_vma_budget.html#ab82e1d1754c2d210d0bdf90220bc6cdd">VmaBudget</a></li>
<li>bytesFreed&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#ab0cb9ac0dbc106c77e384ea676422f28">VmaDefragmentationStats</a></li>
<li>bytesMoved&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#a36f9d5df2a10ba2a36b16e126d60572d">VmaDefragmentationStats</a></li>
</ul>
<h3><a id="index_d" name="index_d"></a>- d -</h3><ul>
<li>dedicatedMemory&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#a7cf87251bd155d00ac6c6aaf4fc10448">VmaAllocationInfo2</a></li>
<li>device&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#a012b4c485bf3b0ea8921352c5ee0c357">VmaAllocatorInfo</a></li>
<li>deviceMemory&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#ae0bfb7dfdf79a76ffefc9a94677a2f67">VmaAllocationInfo</a></li>
<li>deviceMemoryBlocksFreed&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#a0113f1877904a5d1ee8f409216ff276b">VmaDefragmentationStats</a></li>
<li>dstTmpAllocation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#ab65b106adf209acd7313296d1075300e">VmaDefragmentationMove</a></li>
</ul>
<h3><a id="index_f" name="index_f"></a>- f -</h3><ul>
<li>flags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_defragmentation_info.html#a3e23080c978ecf3abb3180f5b2069da7">VmaDefragmentationInfo</a>, <a class="el" href="struct_vma_pool_create_info.html#a8405139f63d078340ae74513a59f5446">VmaPoolCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912">VmaVirtualBlockCreateInfo</a></li>
</ul>
<h3><a id="index_i" name="index_i"></a>- i -</h3><ul>
<li>instance&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a70dd42e29b1df1d1b9b61532ae0b370b">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#a2ed6a4d2d3fea039d66a13f15d0ce5fe">VmaAllocatorInfo</a></li>
</ul>
<h3><a id="index_m" name="index_m"></a>- m -</h3><ul>
<li>maxAllocationsPerPass&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#ac2db29d309bebc4f7d55041416e9694b">VmaDefragmentationInfo</a></li>
<li>maxBlockCount&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c">VmaPoolCreateInfo</a></li>
<li>maxBytesPerPass&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#a637ada77b02179a27fa92290000afac4">VmaDefragmentationInfo</a></li>
<li>memoryHeap&#160;:&#160;<a class="el" href="struct_vma_total_statistics.html#a39beeba5b3a2e7cfe5f5e2331a2705ce">VmaTotalStatistics</a></li>
<li>memoryType&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a7f6b0aa58c135e488e6b40a388dad9d5">VmaAllocationInfo</a>, <a class="el" href="struct_vma_total_statistics.html#acb70e5b7fe543813ed8ba9282640969d">VmaTotalStatistics</a></li>
<li>memoryTypeBits&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055">VmaAllocationCreateInfo</a></li>
<li>memoryTypeIndex&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319">VmaPoolCreateInfo</a></li>
<li>minAllocationAlignment&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ade3eca546f0c6ab4e8fbf20eb6d854cb">VmaPoolCreateInfo</a></li>
<li>minBlockCount&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ad8006fb803185c0a699d30f3e9a865ae">VmaPoolCreateInfo</a></li>
<li>moveCount&#160;:&#160;<a class="el" href="struct_vma_defragmentation_pass_move_info.html#a1b3e18c23f9691f35baf183e615c4408">VmaDefragmentationPassMoveInfo</a></li>
</ul>
<h3><a id="index_o" name="index_o"></a>- o -</h3><ul>
<li>offset&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a4a3c732388dbdc7a23f9365b00825268">VmaAllocationInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#accb40a8205f49ccca3de975da7d1a2b5">VmaVirtualAllocationInfo</a></li>
<li>operation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#a20996a4686c9246dff77b375ac4a91e2">VmaDefragmentationMove</a></li>
</ul>
<h3><a id="index_p" name="index_p"></a>- p -</h3><ul>
<li>pAllocationCallbacks&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a6e409087e3be55400d0e4ccbe43c608d">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#a290283bf915c257d24584872d793ad30">VmaVirtualBlockCreateInfo</a></li>
<li>pBreakCallbackUserData&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#ab08ed4a96a671ca176d926ccc31b203f">VmaDefragmentationInfo</a></li>
<li>pDeviceMemoryCallbacks&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#af1380969b5e1ea4c3184a877892d260e">VmaAllocatorCreateInfo</a></li>
<li>pfnAllocate&#160;:&#160;<a class="el" href="struct_vma_device_memory_callbacks.html#a4f17f7b255101e733b44d5633aceabfb">VmaDeviceMemoryCallbacks</a></li>
<li>pfnBreakCallback&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#a9f189976b5b605345f84b5b5217acc0f">VmaDefragmentationInfo</a></li>
<li>pfnFree&#160;:&#160;<a class="el" href="struct_vma_device_memory_callbacks.html#abe8a3328bbc916f6f712fdb6b299444c">VmaDeviceMemoryCallbacks</a></li>
<li>pHeapSizeLimit&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a31c192aa6cbffa33279f6d9f0c47c44b">VmaAllocatorCreateInfo</a></li>
<li>physicalDevice&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a08230f04ae6ccf8a78150a9e829a7156">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#aba2b703f96e51d567717e1fb2935b47a">VmaAllocatorInfo</a></li>
<li>pMappedData&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">VmaAllocationInfo</a></li>
<li>pMemoryAllocateNext&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ab6f2e52c47bfe1f4b44920b8bfc27b41">VmaPoolCreateInfo</a></li>
<li>pMoves&#160;:&#160;<a class="el" href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725">VmaDefragmentationPassMoveInfo</a></li>
<li>pName&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a28612f3e897e5b268254a3c63413d759">VmaAllocationInfo</a></li>
<li>pool&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_defragmentation_info.html#a18dd2097d8ab2976cdc7dd3e7b978bd4">VmaDefragmentationInfo</a></li>
<li>preferredFlags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">VmaAllocationCreateInfo</a></li>
<li>preferredLargeHeapBlockSize&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a8e4714298e3121cdd8b214a1ae7a637a">VmaAllocatorCreateInfo</a></li>
<li>priority&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a983d39e1a2e63649d78a960aa2fdd0f7">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_pool_create_info.html#a16e686c688f6725f119ebf6e24ab5274">VmaPoolCreateInfo</a></li>
<li>pTypeExternalMemoryHandleTypes&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ae8f0db05e5cb4c43d7713bf4a49a736b">VmaAllocatorCreateInfo</a></li>
<li>pUserData&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a8259e85c272683434f4abb4ddddffe19">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">VmaAllocationInfo</a>, <a class="el" href="struct_vma_device_memory_callbacks.html#a24052de0937ddd54015a2df0363903c6">VmaDeviceMemoryCallbacks</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#a015f8544ca51a7350f7434d42d0587bb">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#a41d5cb09357656411653d82fee436f45">VmaVirtualAllocationInfo</a></li>
<li>pVulkanFunctions&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd">VmaAllocatorCreateInfo</a></li>
</ul>
<h3><a id="index_r" name="index_r"></a>- r -</h3><ul>
<li>requiredFlags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a9166390303ff42d783305bc31c2b6b90">VmaAllocationCreateInfo</a></li>
</ul>
<h3><a id="index_s" name="index_s"></a>- s -</h3><ul>
<li>size&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#aac76d113a6a5ccbb09fea00fb25fd18f">VmaAllocationInfo</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#aae08752b86817abd0d944c6025dc603e">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#afb6d6bd0a6813869ea0842048d40aa2b">VmaVirtualAllocationInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9">VmaVirtualBlockCreateInfo</a></li>
<li>srcAllocation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#a25aa1bb64efc507a49c6cbc50689f862">VmaDefragmentationMove</a></li>
<li>statistics&#160;:&#160;<a class="el" href="struct_vma_budget.html#a6d15ab3a798fd62d9efa3a1e1f83bf54">VmaBudget</a>, <a class="el" href="struct_vma_detailed_statistics.html#a13efbdb35bd1291191d275f43e96d360">VmaDetailedStatistics</a></li>
</ul>
<h3><a id="index_t" name="index_t"></a>- t -</h3><ul>
<li>total&#160;:&#160;<a class="el" href="struct_vma_total_statistics.html#a76f1935f7101883f5bb2a03b6c5649d2">VmaTotalStatistics</a></li>
</ul>
<h3><a id="index_u" name="index_u"></a>- u -</h3><ul>
<li>unusedRangeCount&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#ab721bf04892e8b67802d4ddb7734638a">VmaDetailedStatistics</a></li>
<li>unusedRangeSizeMax&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#af98943b5da98cf441ffa04b67914c78c">VmaDetailedStatistics</a></li>
<li>unusedRangeSizeMin&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a830eda847ed735d0e91da25cfcf797a4">VmaDetailedStatistics</a></li>
<li>usage&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_budget.html#a84dd1ecca8b0110259eb206dbadb11f6">VmaBudget</a></li>
</ul>
<h3><a id="index_v" name="index_v"></a>- v -</h3><ul>
<li>vkAllocateMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a2943bf99dfd784a0e8f599d987e22e6c">VmaVulkanFunctions</a></li>
<li>vkBindBufferMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a94fc4f3a605d9880bb3c0ba2c2fc80b2">VmaVulkanFunctions</a></li>
<li>vkBindBufferMemory2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a0c4907235aab9df2767b79836afa2dc9">VmaVulkanFunctions</a></li>
<li>vkBindImageMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a1338d96a128a5ade648b8d934907c637">VmaVulkanFunctions</a></li>
<li>vkBindImageMemory2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab95aaa73ab8a3fe9fd3daaaec4e0b2bf">VmaVulkanFunctions</a></li>
<li>vkCmdCopyBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ae5c0db8c89a3b82593dc16aa6a49fa3a">VmaVulkanFunctions</a></li>
<li>vkCreateBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ae8084315a25006271a2edfc3a447519f">VmaVulkanFunctions</a></li>
<li>vkCreateImage&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a23ebe70be515b9b5010a1d691200e325">VmaVulkanFunctions</a></li>
<li>vkDestroyBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a7e054606faddb07f0e8556f3ed317d45">VmaVulkanFunctions</a></li>
<li>vkDestroyImage&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a90b898227039b1dcb3520f6e91f09ffa">VmaVulkanFunctions</a></li>
<li>vkFlushMappedMemoryRanges&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a33c322f4c4ad2810f8a9c97a277572f9">VmaVulkanFunctions</a></li>
<li>vkFreeMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a4c658701778564d62034255b5dda91b4">VmaVulkanFunctions</a></li>
<li>vkGetBufferMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a5b92901df89a4194b0d12f6071d4d143">VmaVulkanFunctions</a></li>
<li>vkGetBufferMemoryRequirements2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a9d8d1b05d2b1e7e1d9b27f6f585acf9c">VmaVulkanFunctions</a></li>
<li>vkGetDeviceBufferMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab25228053223e8a4dcd062574beed88d">VmaVulkanFunctions</a></li>
<li>vkGetDeviceImageMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a10a9bf098a46640fa0a75f1c5fd80b9a">VmaVulkanFunctions</a></li>
<li>vkGetDeviceProcAddr&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57">VmaVulkanFunctions</a></li>
<li>vkGetImageMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a475f6f49f8debe4d10800592606d53f4">VmaVulkanFunctions</a></li>
<li>vkGetImageMemoryRequirements2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a9cdcdc1e2b2ea7c571f7d27e30ba6875">VmaVulkanFunctions</a></li>
<li>vkGetInstanceProcAddr&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceMemoryProperties&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a60d25c33bba06bb8592e6875cbaa9830">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceMemoryProperties2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a0d992896e6ffcf92b9d7ea049fa5c445">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceProperties&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a77b7a74082823e865dd6546623468f96">VmaVulkanFunctions</a></li>
<li>vkInvalidateMappedMemoryRanges&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a5c1093bc32386a8060c37c9f282078a1">VmaVulkanFunctions</a></li>
<li>vkMapMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab5c1f38dea3a2cf00dc9eb4f57218c49">VmaVulkanFunctions</a></li>
<li>vkUnmapMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#acc798589736f0becb317fc2196c1d8b9">VmaVulkanFunctions</a></li>
<li>vulkanApiVersion&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285">VmaAllocatorCreateInfo</a></li>
</ul>
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<div class="contents">
<div class="textblock">Here is a list of all variables with links to the classes they belong to:</div>
<h3><a id="index_a" name="index_a"></a>- a -</h3><ul>
<li>alignment&#160;:&#160;<a class="el" href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821">VmaVirtualAllocationCreateInfo</a></li>
<li>allocationBytes&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">VmaStatistics</a></li>
<li>allocationCount&#160;:&#160;<a class="el" href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">VmaStatistics</a></li>
<li>allocationInfo&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#a315218ac1206a05026c95e06a8bbd6d5">VmaAllocationInfo2</a></li>
<li>allocationSizeMax&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a06b2add24eed3449a66ff151979a0201">VmaDetailedStatistics</a></li>
<li>allocationSizeMin&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a6fb397e7487e10f2a52e241577d2a2b8">VmaDetailedStatistics</a></li>
<li>allocationsMoved&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#aefeabf130022008eadd75999478af3f9">VmaDefragmentationStats</a></li>
</ul>
<h3><a id="index_b" name="index_b"></a>- b -</h3><ul>
<li>blockBytes&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a2afbc1c7aa8ad7bbb8de06215ba7e5c4">VmaStatistics</a></li>
<li>blockCount&#160;:&#160;<a class="el" href="struct_vma_statistics.html#a309179d5853a6a7cd534df497ee43957">VmaStatistics</a></li>
<li>blockSize&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#aae839de16b3a62cc42c69df378e8e3a2">VmaAllocationInfo2</a>, <a class="el" href="struct_vma_pool_create_info.html#aa4265160536cdb9be821b7686c16c676">VmaPoolCreateInfo</a></li>
<li>budget&#160;:&#160;<a class="el" href="struct_vma_budget.html#ab82e1d1754c2d210d0bdf90220bc6cdd">VmaBudget</a></li>
<li>bytesFreed&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#ab0cb9ac0dbc106c77e384ea676422f28">VmaDefragmentationStats</a></li>
<li>bytesMoved&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#a36f9d5df2a10ba2a36b16e126d60572d">VmaDefragmentationStats</a></li>
</ul>
<h3><a id="index_d" name="index_d"></a>- d -</h3><ul>
<li>dedicatedMemory&#160;:&#160;<a class="el" href="struct_vma_allocation_info2.html#a7cf87251bd155d00ac6c6aaf4fc10448">VmaAllocationInfo2</a></li>
<li>device&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#a012b4c485bf3b0ea8921352c5ee0c357">VmaAllocatorInfo</a></li>
<li>deviceMemory&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#ae0bfb7dfdf79a76ffefc9a94677a2f67">VmaAllocationInfo</a></li>
<li>deviceMemoryBlocksFreed&#160;:&#160;<a class="el" href="struct_vma_defragmentation_stats.html#a0113f1877904a5d1ee8f409216ff276b">VmaDefragmentationStats</a></li>
<li>dstTmpAllocation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#ab65b106adf209acd7313296d1075300e">VmaDefragmentationMove</a></li>
</ul>
<h3><a id="index_f" name="index_f"></a>- f -</h3><ul>
<li>flags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_defragmentation_info.html#a3e23080c978ecf3abb3180f5b2069da7">VmaDefragmentationInfo</a>, <a class="el" href="struct_vma_pool_create_info.html#a8405139f63d078340ae74513a59f5446">VmaPoolCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912">VmaVirtualBlockCreateInfo</a></li>
</ul>
<h3><a id="index_i" name="index_i"></a>- i -</h3><ul>
<li>instance&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a70dd42e29b1df1d1b9b61532ae0b370b">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#a2ed6a4d2d3fea039d66a13f15d0ce5fe">VmaAllocatorInfo</a></li>
</ul>
<h3><a id="index_m" name="index_m"></a>- m -</h3><ul>
<li>maxAllocationsPerPass&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#ac2db29d309bebc4f7d55041416e9694b">VmaDefragmentationInfo</a></li>
<li>maxBlockCount&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ae41142f2834fcdc82baa4883c187b75c">VmaPoolCreateInfo</a></li>
<li>maxBytesPerPass&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#a637ada77b02179a27fa92290000afac4">VmaDefragmentationInfo</a></li>
<li>memoryHeap&#160;:&#160;<a class="el" href="struct_vma_total_statistics.html#a39beeba5b3a2e7cfe5f5e2331a2705ce">VmaTotalStatistics</a></li>
<li>memoryType&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a7f6b0aa58c135e488e6b40a388dad9d5">VmaAllocationInfo</a>, <a class="el" href="struct_vma_total_statistics.html#acb70e5b7fe543813ed8ba9282640969d">VmaTotalStatistics</a></li>
<li>memoryTypeBits&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a3bf940c0271d85d6ba32a4d820075055">VmaAllocationCreateInfo</a></li>
<li>memoryTypeIndex&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#a596fa76b685d3f1f688f84a709a5b319">VmaPoolCreateInfo</a></li>
<li>minAllocationAlignment&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ade3eca546f0c6ab4e8fbf20eb6d854cb">VmaPoolCreateInfo</a></li>
<li>minBlockCount&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ad8006fb803185c0a699d30f3e9a865ae">VmaPoolCreateInfo</a></li>
<li>moveCount&#160;:&#160;<a class="el" href="struct_vma_defragmentation_pass_move_info.html#a1b3e18c23f9691f35baf183e615c4408">VmaDefragmentationPassMoveInfo</a></li>
</ul>
<h3><a id="index_o" name="index_o"></a>- o -</h3><ul>
<li>offset&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a4a3c732388dbdc7a23f9365b00825268">VmaAllocationInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#accb40a8205f49ccca3de975da7d1a2b5">VmaVirtualAllocationInfo</a></li>
<li>operation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#a20996a4686c9246dff77b375ac4a91e2">VmaDefragmentationMove</a></li>
</ul>
<h3><a id="index_p" name="index_p"></a>- p -</h3><ul>
<li>pAllocationCallbacks&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a6e409087e3be55400d0e4ccbe43c608d">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#a290283bf915c257d24584872d793ad30">VmaVirtualBlockCreateInfo</a></li>
<li>pBreakCallbackUserData&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#ab08ed4a96a671ca176d926ccc31b203f">VmaDefragmentationInfo</a></li>
<li>pDeviceMemoryCallbacks&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#af1380969b5e1ea4c3184a877892d260e">VmaAllocatorCreateInfo</a></li>
<li>pfnAllocate&#160;:&#160;<a class="el" href="struct_vma_device_memory_callbacks.html#a4f17f7b255101e733b44d5633aceabfb">VmaDeviceMemoryCallbacks</a></li>
<li>pfnBreakCallback&#160;:&#160;<a class="el" href="struct_vma_defragmentation_info.html#a9f189976b5b605345f84b5b5217acc0f">VmaDefragmentationInfo</a></li>
<li>pfnFree&#160;:&#160;<a class="el" href="struct_vma_device_memory_callbacks.html#abe8a3328bbc916f6f712fdb6b299444c">VmaDeviceMemoryCallbacks</a></li>
<li>pHeapSizeLimit&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a31c192aa6cbffa33279f6d9f0c47c44b">VmaAllocatorCreateInfo</a></li>
<li>physicalDevice&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a08230f04ae6ccf8a78150a9e829a7156">VmaAllocatorCreateInfo</a>, <a class="el" href="struct_vma_allocator_info.html#aba2b703f96e51d567717e1fb2935b47a">VmaAllocatorInfo</a></li>
<li>pMappedData&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">VmaAllocationInfo</a></li>
<li>pMemoryAllocateNext&#160;:&#160;<a class="el" href="struct_vma_pool_create_info.html#ab6f2e52c47bfe1f4b44920b8bfc27b41">VmaPoolCreateInfo</a></li>
<li>pMoves&#160;:&#160;<a class="el" href="struct_vma_defragmentation_pass_move_info.html#adfa7a4994afd9b940e7f1dfaf436a725">VmaDefragmentationPassMoveInfo</a></li>
<li>pName&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#a28612f3e897e5b268254a3c63413d759">VmaAllocationInfo</a></li>
<li>pool&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a6272c0555cfd1fe28bff1afeb6190150">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_defragmentation_info.html#a18dd2097d8ab2976cdc7dd3e7b978bd4">VmaDefragmentationInfo</a></li>
<li>preferredFlags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">VmaAllocationCreateInfo</a></li>
<li>preferredLargeHeapBlockSize&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a8e4714298e3121cdd8b214a1ae7a637a">VmaAllocatorCreateInfo</a></li>
<li>priority&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a983d39e1a2e63649d78a960aa2fdd0f7">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_pool_create_info.html#a16e686c688f6725f119ebf6e24ab5274">VmaPoolCreateInfo</a></li>
<li>pTypeExternalMemoryHandleTypes&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ae8f0db05e5cb4c43d7713bf4a49a736b">VmaAllocatorCreateInfo</a></li>
<li>pUserData&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a8259e85c272683434f4abb4ddddffe19">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_allocation_info.html#adc507656149c04de7ed95d0042ba2a13">VmaAllocationInfo</a>, <a class="el" href="struct_vma_device_memory_callbacks.html#a24052de0937ddd54015a2df0363903c6">VmaDeviceMemoryCallbacks</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#a015f8544ca51a7350f7434d42d0587bb">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#a41d5cb09357656411653d82fee436f45">VmaVirtualAllocationInfo</a></li>
<li>pVulkanFunctions&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd">VmaAllocatorCreateInfo</a></li>
</ul>
<h3><a id="index_r" name="index_r"></a>- r -</h3><ul>
<li>requiredFlags&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#a9166390303ff42d783305bc31c2b6b90">VmaAllocationCreateInfo</a></li>
</ul>
<h3><a id="index_s" name="index_s"></a>- s -</h3><ul>
<li>size&#160;:&#160;<a class="el" href="struct_vma_allocation_info.html#aac76d113a6a5ccbb09fea00fb25fd18f">VmaAllocationInfo</a>, <a class="el" href="struct_vma_virtual_allocation_create_info.html#aae08752b86817abd0d944c6025dc603e">VmaVirtualAllocationCreateInfo</a>, <a class="el" href="struct_vma_virtual_allocation_info.html#afb6d6bd0a6813869ea0842048d40aa2b">VmaVirtualAllocationInfo</a>, <a class="el" href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9">VmaVirtualBlockCreateInfo</a></li>
<li>srcAllocation&#160;:&#160;<a class="el" href="struct_vma_defragmentation_move.html#a25aa1bb64efc507a49c6cbc50689f862">VmaDefragmentationMove</a></li>
<li>statistics&#160;:&#160;<a class="el" href="struct_vma_budget.html#a6d15ab3a798fd62d9efa3a1e1f83bf54">VmaBudget</a>, <a class="el" href="struct_vma_detailed_statistics.html#a13efbdb35bd1291191d275f43e96d360">VmaDetailedStatistics</a></li>
</ul>
<h3><a id="index_t" name="index_t"></a>- t -</h3><ul>
<li>total&#160;:&#160;<a class="el" href="struct_vma_total_statistics.html#a76f1935f7101883f5bb2a03b6c5649d2">VmaTotalStatistics</a></li>
</ul>
<h3><a id="index_u" name="index_u"></a>- u -</h3><ul>
<li>unusedRangeCount&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#ab721bf04892e8b67802d4ddb7734638a">VmaDetailedStatistics</a></li>
<li>unusedRangeSizeMax&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#af98943b5da98cf441ffa04b67914c78c">VmaDetailedStatistics</a></li>
<li>unusedRangeSizeMin&#160;:&#160;<a class="el" href="struct_vma_detailed_statistics.html#a830eda847ed735d0e91da25cfcf797a4">VmaDetailedStatistics</a></li>
<li>usage&#160;:&#160;<a class="el" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo</a>, <a class="el" href="struct_vma_budget.html#a84dd1ecca8b0110259eb206dbadb11f6">VmaBudget</a></li>
</ul>
<h3><a id="index_v" name="index_v"></a>- v -</h3><ul>
<li>vkAllocateMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a2943bf99dfd784a0e8f599d987e22e6c">VmaVulkanFunctions</a></li>
<li>vkBindBufferMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a94fc4f3a605d9880bb3c0ba2c2fc80b2">VmaVulkanFunctions</a></li>
<li>vkBindBufferMemory2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a0c4907235aab9df2767b79836afa2dc9">VmaVulkanFunctions</a></li>
<li>vkBindImageMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a1338d96a128a5ade648b8d934907c637">VmaVulkanFunctions</a></li>
<li>vkBindImageMemory2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab95aaa73ab8a3fe9fd3daaaec4e0b2bf">VmaVulkanFunctions</a></li>
<li>vkCmdCopyBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ae5c0db8c89a3b82593dc16aa6a49fa3a">VmaVulkanFunctions</a></li>
<li>vkCreateBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ae8084315a25006271a2edfc3a447519f">VmaVulkanFunctions</a></li>
<li>vkCreateImage&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a23ebe70be515b9b5010a1d691200e325">VmaVulkanFunctions</a></li>
<li>vkDestroyBuffer&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a7e054606faddb07f0e8556f3ed317d45">VmaVulkanFunctions</a></li>
<li>vkDestroyImage&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a90b898227039b1dcb3520f6e91f09ffa">VmaVulkanFunctions</a></li>
<li>vkFlushMappedMemoryRanges&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a33c322f4c4ad2810f8a9c97a277572f9">VmaVulkanFunctions</a></li>
<li>vkFreeMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a4c658701778564d62034255b5dda91b4">VmaVulkanFunctions</a></li>
<li>vkGetBufferMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a5b92901df89a4194b0d12f6071d4d143">VmaVulkanFunctions</a></li>
<li>vkGetBufferMemoryRequirements2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a9d8d1b05d2b1e7e1d9b27f6f585acf9c">VmaVulkanFunctions</a></li>
<li>vkGetDeviceBufferMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab25228053223e8a4dcd062574beed88d">VmaVulkanFunctions</a></li>
<li>vkGetDeviceImageMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a10a9bf098a46640fa0a75f1c5fd80b9a">VmaVulkanFunctions</a></li>
<li>vkGetDeviceProcAddr&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57">VmaVulkanFunctions</a></li>
<li>vkGetImageMemoryRequirements&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a475f6f49f8debe4d10800592606d53f4">VmaVulkanFunctions</a></li>
<li>vkGetImageMemoryRequirements2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a9cdcdc1e2b2ea7c571f7d27e30ba6875">VmaVulkanFunctions</a></li>
<li>vkGetInstanceProcAddr&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceMemoryProperties&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a60d25c33bba06bb8592e6875cbaa9830">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceMemoryProperties2KHR&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a0d992896e6ffcf92b9d7ea049fa5c445">VmaVulkanFunctions</a></li>
<li>vkGetPhysicalDeviceProperties&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a77b7a74082823e865dd6546623468f96">VmaVulkanFunctions</a></li>
<li>vkInvalidateMappedMemoryRanges&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#a5c1093bc32386a8060c37c9f282078a1">VmaVulkanFunctions</a></li>
<li>vkMapMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#ab5c1f38dea3a2cf00dc9eb4f57218c49">VmaVulkanFunctions</a></li>
<li>vkUnmapMemory&#160;:&#160;<a class="el" href="struct_vma_vulkan_functions.html#acc798589736f0becb317fc2196c1d8b9">VmaVulkanFunctions</a></li>
<li>vulkanApiVersion&#160;:&#160;<a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285">VmaAllocatorCreateInfo</a></li>
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<div class="headertitle"><div class="title">General considerations</div></div>
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<div class="textblock"><h1><a class="anchor" id="general_considerations_thread_safety"></a>
Thread safety</h1>
<ul>
<li>The library has no global state, so separate <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> objects can be used independently. There should be no need to create multiple such objects though - one per <code>VkDevice</code> is enough.</li>
<li>By default, all calls to functions that take <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> as first parameter are safe to call from multiple threads simultaneously because they are synchronized internally when needed. This includes allocation and deallocation from default memory pool, as well as custom <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a>.</li>
<li>When the allocator is created with <a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca4816ddaed324ba110172ca608a20f29d" title="Allocator and all objects created from it will not be synchronized internally, so you must guarantee ...">VMA_ALLOCATOR_CREATE_EXTERNALLY_SYNCHRONIZED_BIT</a> flag, calls to functions that take such <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object must be synchronized externally.</li>
<li>Access to a <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> object must be externally synchronized. For example, you must not call <a class="el" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b" title="Returns current information about specified allocation.">vmaGetAllocationInfo()</a> and <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> from different threads at the same time if you pass the same <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> object to these functions.</li>
<li><a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> is not safe to be used from multiple threads simultaneously.</li>
</ul>
<h1><a class="anchor" id="general_considerations_versioning_and_compatibility"></a>
Versioning and compatibility</h1>
<p>The library uses <a href="https://semver.org/"><b>Semantic Versioning</b></a>, which means version numbers follow convention: Major.Minor.Patch (e.g. 2.3.0), where:</p>
<ul>
<li>Incremented Patch version means a release is backward- and forward-compatible, introducing only some internal improvements, bug fixes, optimizations etc. or changes that are out of scope of the official API described in this documentation.</li>
<li>Incremented Minor version means a release is backward-compatible, so existing code that uses the library should continue to work, while some new symbols could have been added: new structures, functions, new values in existing enums and bit flags, new structure members, but not new function parameters.</li>
<li>Incrementing Major version means a release could break some backward compatibility.</li>
</ul>
<p>All changes between official releases are documented in file "CHANGELOG.md".</p>
<dl class="section warning"><dt>Warning</dt><dd>Backward compatibility is considered on the level of C++ source code, not binary linkage. Adding new members to existing structures is treated as backward compatible if initializing the new members to binary zero results in the old behavior. You should always fully initialize all library structures to zeros and not rely on their exact binary size.</dd></dl>
<h1><a class="anchor" id="general_considerations_validation_layer_warnings"></a>
Validation layer warnings</h1>
<p>When using this library, you can meet following types of warnings issued by Vulkan validation layer. They don't necessarily indicate a bug, so you may need to just ignore them.</p>
<ul>
<li><em>vkBindBufferMemory(): Binding memory to buffer 0xeb8e4 but vkGetBufferMemoryRequirements() has not been called on that buffer.</em><ul>
<li>It happens when VK_KHR_dedicated_allocation extension is enabled. <code>vkGetBufferMemoryRequirements2KHR</code> function is used instead, while validation layer seems to be unaware of it.</li>
</ul>
</li>
<li><em>Mapping an image with layout VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL can result in undefined behavior if this memory is used by the device. Only GENERAL or PREINITIALIZED should be used.</em><ul>
<li>It happens when you map a buffer or image, because the library maps entire <code>VkDeviceMemory</code> block, where different types of images and buffers may end up together, especially on GPUs with unified memory like Intel.</li>
</ul>
</li>
<li><em>Non-linear image 0xebc91 is aliased with linear buffer 0xeb8e4 which may indicate a bug.</em><ul>
<li>It may happen when you use <a class="el" href="defragmentation.html">defragmentation</a>.</li>
</ul>
</li>
</ul>
<h1><a class="anchor" id="general_considerations_allocation_algorithm"></a>
Allocation algorithm</h1>
<p>The library uses following algorithm for allocation, in order:</p>
<ol type="1">
<li>Try to find free range of memory in existing blocks.</li>
<li>If failed, try to create a new block of <code>VkDeviceMemory</code>, with preferred block size.</li>
<li>If failed, try to create such block with size / 2, size / 4, size / 8.</li>
<li>If failed, try to allocate separate <code>VkDeviceMemory</code> for this allocation, just like when you use <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a>.</li>
<li>If failed, choose other memory type that meets the requirements specified in <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> and go to point 1.</li>
<li>If failed, return <code>VK_ERROR_OUT_OF_DEVICE_MEMORY</code>.</li>
</ol>
<h1><a class="anchor" id="general_considerations_features_not_supported"></a>
Features not supported</h1>
<p>Features deliberately excluded from the scope of this library:</p>
<ol type="1">
<li><b>Data transfer.</b> Uploading (streaming) and downloading data of buffers and images between CPU and GPU memory and related synchronization is responsibility of the user. Defining some "texture" object that would automatically stream its data from a staging copy in CPU memory to GPU memory would rather be a feature of another, higher-level library implemented on top of VMA. VMA doesn't record any commands to a <code>VkCommandBuffer</code>. It just allocates memory.</li>
<li><b>Recreation of buffers and images.</b> Although the library has functions for buffer and image creation: <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51" title="Creates a new VkBuffer, allocates and binds memory for it.">vmaCreateBuffer()</a>, <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>, you need to recreate these objects yourself after defragmentation. That is because the big structures <code>VkBufferCreateInfo</code>, <code>VkImageCreateInfo</code> are not stored in <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> object.</li>
<li><b>Handling CPU memory allocation failures.</b> When dynamically creating small C++ objects in CPU memory (not Vulkan memory), allocation failures are not checked and handled gracefully, because that would complicate code significantly and is usually not needed in desktop PC applications anyway. Success of an allocation is just checked with an assert.</li>
<li><b>Code free of any compiler warnings.</b> Maintaining the library to compile and work correctly on so many different platforms is hard enough. Being free of any warnings, on any version of any compiler, is simply not feasible. There are many preprocessor macros that make some variables unused, function parameters unreferenced, or conditional expressions constant in some configurations. The code of this library should not be bigger or more complicated just to silence these warnings. It is recommended to disable such warnings instead.</li>
<li>This is a C++ library with C interface. <b>Bindings or ports to any other programming languages</b> are welcome as external projects but are not going to be included into this repository. </li>
</ol>
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<li>vmaBeginDefragmentation()&#160;:&#160;<a class="el" href="group__group__alloc.html#gac3335566858b45541fa9c0d7a6bbb57e">vk_mem_alloc.h</a></li>
<li>vmaBeginDefragmentationPass()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00">vk_mem_alloc.h</a></li>
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<li>VmaDefragmentationStats&#160;:&#160;<a class="el" href="group__group__alloc.html#gad94034192259c2e34a4d1c5e27810403">vk_mem_alloc.h</a></li>
<li>vmaDestroyAllocator()&#160;:&#160;<a class="el" href="group__group__init.html#gaa8d164061c88f22fb1fd3c8f3534bc1d">vk_mem_alloc.h</a></li>
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<li>VmaDeviceMemoryCallbacks&#160;:&#160;<a class="el" href="group__group__init.html#ga77692d3c8770ea8882d573206bd27b2b">vk_mem_alloc.h</a></li>
<li>vmaEndDefragmentation()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga59f01ca3d53d50b7cca9b442b77a3e87">vk_mem_alloc.h</a></li>
<li>vmaEndDefragmentationPass()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndex()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaef15a94b58fbcb0fe706d5720e84a74a">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndexForBufferInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndexForImageInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga088da83d8eaf3ce9056d9ea0b981d472">vk_mem_alloc.h</a></li>
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<li>vmaFlushAllocations()&#160;:&#160;<a class="el" href="group__group__alloc.html#gac3dd00da721875ed99fa8a881922bdfc">vk_mem_alloc.h</a></li>
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<li>vmaFreeVirtualBlockStatsString()&#160;:&#160;<a class="el" href="group__group__stats.html#ga47fb8d8aa69df4a7c23a9719b4080623">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationInfo2()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga1405cf3eae2fd1305d645879173031a0">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationMemoryProperties()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1">vk_mem_alloc.h</a></li>
<li>vmaGetAllocatorInfo()&#160;:&#160;<a class="el" href="group__group__init.html#gafa02231a791b37255720d566a52683e7">vk_mem_alloc.h</a></li>
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<li>vmaGetMemoryTypeProperties()&#160;:&#160;<a class="el" href="group__group__init.html#ga8701444752eb5de4464adb5a2b514bca">vk_mem_alloc.h</a></li>
<li>vmaGetPhysicalDeviceProperties()&#160;:&#160;<a class="el" href="group__group__init.html#gaecabf7b6e91ea87d0316fa0a9e014fe0">vk_mem_alloc.h</a></li>
<li>vmaGetPoolName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaf09b4e4eafdbee812e8d73ddf960f030">vk_mem_alloc.h</a></li>
<li>vmaGetPoolStatistics()&#160;:&#160;<a class="el" href="group__group__stats.html#ga34d8e7d83774eed0caee5c5ae88e217d">vk_mem_alloc.h</a></li>
<li>vmaGetVirtualAllocationInfo()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga8ee14ceb1fe033ec84d8aa29e1f75afa">vk_mem_alloc.h</a></li>
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<li>vmaInvalidateAllocation()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaaa8412919139ef413a4215ac6a290fae">vk_mem_alloc.h</a></li>
<li>vmaInvalidateAllocations()&#160;:&#160;<a class="el" href="group__group__alloc.html#gab25b558d75f7378ec944a1522fdcc3c5">vk_mem_alloc.h</a></li>
<li>vmaIsVirtualBlockEmpty()&#160;:&#160;<a class="el" href="group__group__virtual.html#gacd53b5b1d23f8fcbad692ccfdc1811f1">vk_mem_alloc.h</a></li>
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<li>VmaMemoryUsage&#160;:&#160;<a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc">vk_mem_alloc.h</a></li>
<li>VmaPoolCreateFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#ga9a7c45f9c863695d98c83fa5ac940fe7">vk_mem_alloc.h</a></li>
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<li>VmaPoolCreateInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#ga1017aa83489c0eee8d2163d2bf253f67">vk_mem_alloc.h</a></li>
<li>vmaSetAllocationName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc">vk_mem_alloc.h</a></li>
<li>vmaSetAllocationUserData()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaf9147d31ffc11d62fc187bde283ed14f">vk_mem_alloc.h</a></li>
<li>vmaSetCurrentFrameIndex()&#160;:&#160;<a class="el" href="group__group__init.html#gade56bf8dc9f5a5eaddf5f119ed525236">vk_mem_alloc.h</a></li>
<li>vmaSetPoolName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gadbae3a0b4ab078024462fc85c37f3b58">vk_mem_alloc.h</a></li>
<li>vmaSetVirtualAllocationUserData()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga001ea1850458a4062b829e09c303fca2">vk_mem_alloc.h</a></li>
<li>VmaStatistics&#160;:&#160;<a class="el" href="group__group__stats.html#gac94bd1a382a3922ddc8de3af4d3ddd06">vk_mem_alloc.h</a></li>
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<li>vmaUnmapMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga9bc268595cb33f6ec4d519cfce81ff45">vk_mem_alloc.h</a></li>
<li>vmaVirtualAllocate()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga2e9c64d405b14156fea7e10c4ad06cb6">vk_mem_alloc.h</a></li>
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<li>VmaVirtualAllocationCreateInfo&#160;:&#160;<a class="el" href="group__group__virtual.html#gac3c90d80bedc6847a41b82d0e2158c9e">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationInfo&#160;:&#160;<a class="el" href="group__group__virtual.html#ga75bc33ff7cf18c98e101f570dc2a5ebc">vk_mem_alloc.h</a></li>
<li>VmaVirtualBlockCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">vk_mem_alloc.h</a></li>
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<li>VmaVulkanFunctions&#160;:&#160;<a class="el" href="group__group__init.html#gabb0a8e3b5040d847571cca6c7f9a8074">vk_mem_alloc.h</a></li>
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<li>VmaAllocationCreateFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#gad9889c10c798b040d59c92f257cae597">vk_mem_alloc.h</a></li>
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<li>VmaDefragmentationMoveOperation&#160;:&#160;<a class="el" href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">vk_mem_alloc.h</a></li>
<li>VmaMemoryUsage&#160;:&#160;<a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc">vk_mem_alloc.h</a></li>
<li>VmaPoolCreateFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#ga9a7c45f9c863695d98c83fa5ac940fe7">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga2e9c64d405b14156fea7e10c4ad06cb6">vk_mem_alloc.h</a></li>
<li>VmaVirtualBlockCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">vk_mem_alloc.h</a></li>
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<div class="textblock">Here is a list of all enum values with links to the files they belong to:</div>
<h3><a id="index_v" name="index_v"></a>- v -</h3><ul>
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<li>VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT&#160;:&#160;<a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7caa2566e7f75e19ae7ec9c4fa509fea5fb">vk_mem_alloc.h</a></li>
<li>VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT&#160;:&#160;<a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7caca82d4ce40bdb59d3da52a539c21d6b8">vk_mem_alloc.h</a></li>
<li>VMA_DEFRAGMENTATION_FLAG_ALGORITHM_BALANCED_BIT&#160;:&#160;<a class="el" href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50caec35a4138111605a6ff32ca61aa871b6">vk_mem_alloc.h</a></li>
<li>VMA_DEFRAGMENTATION_FLAG_ALGORITHM_EXTENSIVE_BIT&#160;:&#160;<a class="el" href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50cae45a9469e5337731627758671741e412">vk_mem_alloc.h</a></li>
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<li>VMA_DEFRAGMENTATION_FLAG_ALGORITHM_FULL_BIT&#160;:&#160;<a class="el" href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50cafa162eac5be800bcdd4011427a71156d">vk_mem_alloc.h</a></li>
<li>VMA_DEFRAGMENTATION_FLAG_ALGORITHM_MASK&#160;:&#160;<a class="el" href="group__group__alloc.html#gga6552a65b71d16f378c6994b3ceaef50cabcbbdb3bfd53c4c3ab4eaeb5fd4894e9">vk_mem_alloc.h</a></li>
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<li>VMA_VIRTUAL_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6ac1163c03ea837fa663462dc286d6a1a9">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MASK&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6ac5b5e45c335368d18df59c9f27df17e3">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6ae2a9591a62b5e3b1bdcbc81c6188a1bf">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_OFFSET_BIT&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6a3bb82d2aedd587a64846a1d7778852e6">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6a562d10a46012719d33167d3dc5dbbf9b">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_ALLOCATION_CREATE_UPPER_ADDRESS_BIT&#160;:&#160;<a class="el" href="group__group__virtual.html#gga2e9c64d405b14156fea7e10c4ad06cb6a9524a329a55b5ec390d57d90b67ad78e">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_BLOCK_CREATE_ALGORITHM_MASK&#160;:&#160;<a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_BLOCK_CREATE_FLAG_BITS_MAX_ENUM&#160;:&#160;<a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaa5fc0d333c3d5687a8bbf57df9b377a87">vk_mem_alloc.h</a></li>
<li>VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT&#160;:&#160;<a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96">vk_mem_alloc.h</a></li>
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154
externals/vma/docs/html/globals_func.html vendored Normal file
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
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<div class="contents">
<div class="textblock">Here is a list of all functions with links to the files they belong to:</div>
<h3><a id="index_v" name="index_v"></a>- v -</h3><ul>
<li>vmaAllocateMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#gabf28077dbf82d0908b8acbe8ee8dd9b8">vk_mem_alloc.h</a></li>
<li>vmaAllocateMemoryForBuffer()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga7fdf64415b6c3d83c454f28d2c53df7b">vk_mem_alloc.h</a></li>
<li>vmaAllocateMemoryForImage()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga0faa3f9e5fb233d29d1e00390650febb">vk_mem_alloc.h</a></li>
<li>vmaAllocateMemoryPages()&#160;:&#160;<a class="el" href="group__group__alloc.html#gad37e82e492b3de38fc3f4cffd9ad0ae1">vk_mem_alloc.h</a></li>
<li>vmaBeginDefragmentation()&#160;:&#160;<a class="el" href="group__group__alloc.html#gac3335566858b45541fa9c0d7a6bbb57e">vk_mem_alloc.h</a></li>
<li>vmaBeginDefragmentationPass()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00">vk_mem_alloc.h</a></li>
<li>vmaBindBufferMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga6b0929b914b60cf2d45cac4bf3547470">vk_mem_alloc.h</a></li>
<li>vmaBindBufferMemory2()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga861f4f27189a7d11ab9d9eedc825cb6b">vk_mem_alloc.h</a></li>
<li>vmaBindImageMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vk_mem_alloc.h</a></li>
<li>vmaBindImageMemory2()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga5f3502dd7d38b53fb1533ea3921d038d">vk_mem_alloc.h</a></li>
<li>vmaBuildStatsString()&#160;:&#160;<a class="el" href="group__group__stats.html#gaa4fee7eb5253377599ef4fd38c93c2a0">vk_mem_alloc.h</a></li>
<li>vmaBuildVirtualBlockStatsString()&#160;:&#160;<a class="el" href="group__group__stats.html#ga52d810e1222c592e5d80556ad005f1e6">vk_mem_alloc.h</a></li>
<li>vmaCalculatePoolStatistics()&#160;:&#160;<a class="el" href="group__group__stats.html#ga50ba0eb25d2b363b792be4645ca7a380">vk_mem_alloc.h</a></li>
<li>vmaCalculateStatistics()&#160;:&#160;<a class="el" href="group__group__stats.html#ga36f3484de7aa6cd6edc4de9edfa0ff59">vk_mem_alloc.h</a></li>
<li>vmaCalculateVirtualBlockStatistics()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga93c5741bca44b43e5b849cacbd616098">vk_mem_alloc.h</a></li>
<li>vmaCheckCorruption()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga49329a7f030dafcf82f7b73334c22e98">vk_mem_alloc.h</a></li>
<li>vmaCheckPoolCorruption()&#160;:&#160;<a class="el" href="group__group__alloc.html#gad535935619c7a549bf837e1bb0068f89">vk_mem_alloc.h</a></li>
<li>vmaClearVirtualBlock()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga5eda6f55919fb05bd2f56a112590c571">vk_mem_alloc.h</a></li>
<li>vmaCopyAllocationToMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaac883dd38863944335071213b9ae8477">vk_mem_alloc.h</a></li>
<li>vmaCopyMemoryToAllocation()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga11731ec58a3a43a22bb925e0780ef405">vk_mem_alloc.h</a></li>
<li>vmaCreateAliasingBuffer()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga60d5d4803e3c82505a2bfddb929adb03">vk_mem_alloc.h</a></li>
<li>vmaCreateAliasingBuffer2()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaf0cf014344213e117bd9f9cf5f928122">vk_mem_alloc.h</a></li>
<li>vmaCreateAliasingImage()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaebc4db1f94b53dba2338b4c0fd80d0dc">vk_mem_alloc.h</a></li>
<li>vmaCreateAliasingImage2()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga69ac829f5bb0737449fa92c2d971f1bb">vk_mem_alloc.h</a></li>
<li>vmaCreateAllocator()&#160;:&#160;<a class="el" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vk_mem_alloc.h</a></li>
<li>vmaCreateBuffer()&#160;:&#160;<a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vk_mem_alloc.h</a></li>
<li>vmaCreateBufferWithAlignment()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaa06a690013a0d01e60894ac378083834">vk_mem_alloc.h</a></li>
<li>vmaCreateImage()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vk_mem_alloc.h</a></li>
<li>vmaCreatePool()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga5c8770ded7c59c8caac6de0c2cb00b50">vk_mem_alloc.h</a></li>
<li>vmaCreateVirtualBlock()&#160;:&#160;<a class="el" href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b">vk_mem_alloc.h</a></li>
<li>vmaDestroyAllocator()&#160;:&#160;<a class="el" href="group__group__init.html#gaa8d164061c88f22fb1fd3c8f3534bc1d">vk_mem_alloc.h</a></li>
<li>vmaDestroyBuffer()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vk_mem_alloc.h</a></li>
<li>vmaDestroyImage()&#160;:&#160;<a class="el" href="group__group__alloc.html#gae50d2cb3b4a3bfd4dd40987234e50e7e">vk_mem_alloc.h</a></li>
<li>vmaDestroyPool()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga5485779c8f1948238fc4e92232fa65e1">vk_mem_alloc.h</a></li>
<li>vmaDestroyVirtualBlock()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga3795f7783ae2c182cede067d656f66a5">vk_mem_alloc.h</a></li>
<li>vmaEndDefragmentation()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga59f01ca3d53d50b7cca9b442b77a3e87">vk_mem_alloc.h</a></li>
<li>vmaEndDefragmentationPass()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaded05a445742a00718ee766144c5c226">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndex()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaef15a94b58fbcb0fe706d5720e84a74a">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndexForBufferInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#gae790ab9ffaf7667fb8f62523e6897888">vk_mem_alloc.h</a></li>
<li>vmaFindMemoryTypeIndexForImageInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga088da83d8eaf3ce9056d9ea0b981d472">vk_mem_alloc.h</a></li>
<li>vmaFlushAllocation()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga30c37c1eec6025f397be41644f48490f">vk_mem_alloc.h</a></li>
<li>vmaFlushAllocations()&#160;:&#160;<a class="el" href="group__group__alloc.html#gac3dd00da721875ed99fa8a881922bdfc">vk_mem_alloc.h</a></li>
<li>vmaFreeMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga5fea5518972ae9094b1526cbcb19b05f">vk_mem_alloc.h</a></li>
<li>vmaFreeMemoryPages()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga834b1e4aef395c0a1d56a28e69a4a17e">vk_mem_alloc.h</a></li>
<li>vmaFreeStatsString()&#160;:&#160;<a class="el" href="group__group__stats.html#ga3104eb30d8122c84dd8541063f145288">vk_mem_alloc.h</a></li>
<li>vmaFreeVirtualBlockStatsString()&#160;:&#160;<a class="el" href="group__group__stats.html#ga47fb8d8aa69df4a7c23a9719b4080623">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationInfo()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationInfo2()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga1405cf3eae2fd1305d645879173031a0">vk_mem_alloc.h</a></li>
<li>vmaGetAllocationMemoryProperties()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1">vk_mem_alloc.h</a></li>
<li>vmaGetAllocatorInfo()&#160;:&#160;<a class="el" href="group__group__init.html#gafa02231a791b37255720d566a52683e7">vk_mem_alloc.h</a></li>
<li>vmaGetHeapBudgets()&#160;:&#160;<a class="el" href="group__group__stats.html#ga9f88db9d46a432c0ad7278cecbc5eaa7">vk_mem_alloc.h</a></li>
<li>vmaGetMemoryProperties()&#160;:&#160;<a class="el" href="group__group__init.html#gab88db292a17974f911182543fda52d19">vk_mem_alloc.h</a></li>
<li>vmaGetMemoryTypeProperties()&#160;:&#160;<a class="el" href="group__group__init.html#ga8701444752eb5de4464adb5a2b514bca">vk_mem_alloc.h</a></li>
<li>vmaGetPhysicalDeviceProperties()&#160;:&#160;<a class="el" href="group__group__init.html#gaecabf7b6e91ea87d0316fa0a9e014fe0">vk_mem_alloc.h</a></li>
<li>vmaGetPoolName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaf09b4e4eafdbee812e8d73ddf960f030">vk_mem_alloc.h</a></li>
<li>vmaGetPoolStatistics()&#160;:&#160;<a class="el" href="group__group__stats.html#ga34d8e7d83774eed0caee5c5ae88e217d">vk_mem_alloc.h</a></li>
<li>vmaGetVirtualAllocationInfo()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga8ee14ceb1fe033ec84d8aa29e1f75afa">vk_mem_alloc.h</a></li>
<li>vmaGetVirtualBlockStatistics()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga2902aa3130866afcc64bb5f984113db3">vk_mem_alloc.h</a></li>
<li>vmaInvalidateAllocation()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaaa8412919139ef413a4215ac6a290fae">vk_mem_alloc.h</a></li>
<li>vmaInvalidateAllocations()&#160;:&#160;<a class="el" href="group__group__alloc.html#gab25b558d75f7378ec944a1522fdcc3c5">vk_mem_alloc.h</a></li>
<li>vmaIsVirtualBlockEmpty()&#160;:&#160;<a class="el" href="group__group__virtual.html#gacd53b5b1d23f8fcbad692ccfdc1811f1">vk_mem_alloc.h</a></li>
<li>vmaMapMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069">vk_mem_alloc.h</a></li>
<li>vmaSetAllocationName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gabe02cbb0cd913b3f125958179f2020fc">vk_mem_alloc.h</a></li>
<li>vmaSetAllocationUserData()&#160;:&#160;<a class="el" href="group__group__alloc.html#gaf9147d31ffc11d62fc187bde283ed14f">vk_mem_alloc.h</a></li>
<li>vmaSetCurrentFrameIndex()&#160;:&#160;<a class="el" href="group__group__init.html#gade56bf8dc9f5a5eaddf5f119ed525236">vk_mem_alloc.h</a></li>
<li>vmaSetPoolName()&#160;:&#160;<a class="el" href="group__group__alloc.html#gadbae3a0b4ab078024462fc85c37f3b58">vk_mem_alloc.h</a></li>
<li>vmaSetVirtualAllocationUserData()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga001ea1850458a4062b829e09c303fca2">vk_mem_alloc.h</a></li>
<li>vmaUnmapMemory()&#160;:&#160;<a class="el" href="group__group__alloc.html#ga9bc268595cb33f6ec4d519cfce81ff45">vk_mem_alloc.h</a></li>
<li>vmaVirtualAllocate()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vk_mem_alloc.h</a></li>
<li>vmaVirtualFree()&#160;:&#160;<a class="el" href="group__group__virtual.html#ga09fc688c0c3653ff23723b037e5d5033">vk_mem_alloc.h</a></li>
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124
externals/vma/docs/html/globals_type.html vendored Normal file
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<h3><a id="index_p" name="index_p"></a>- p -</h3><ul>
<li>PFN_vmaAllocateDeviceMemoryFunction&#160;:&#160;<a class="el" href="group__group__init.html#ga7e1ed85f7799600b03ad51a77acc21f3">vk_mem_alloc.h</a></li>
<li>PFN_vmaCheckDefragmentationBreakFunction&#160;:&#160;<a class="el" href="group__group__alloc.html#ga6f57b18d4241e80be444842df3094b30">vk_mem_alloc.h</a></li>
<li>PFN_vmaFreeDeviceMemoryFunction&#160;:&#160;<a class="el" href="group__group__init.html#ga154ccaaf53dc2c36378f80f0c4f3679b">vk_mem_alloc.h</a></li>
</ul>
<h3><a id="index_v" name="index_v"></a>- v -</h3><ul>
<li>VmaAllocationCreateFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#ga4fceecc301f4064dc808d3cd6c038941">vk_mem_alloc.h</a></li>
<li>VmaAllocationCreateFlags&#160;:&#160;<a class="el" href="group__group__alloc.html#ga5225e5e11f8376f6a31a1791f3d6e817">vk_mem_alloc.h</a></li>
<li>VmaAllocationCreateInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#ga3bf110892ea2fb4649fedb68488d026a">vk_mem_alloc.h</a></li>
<li>VmaAllocationInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#ga1cf7774606721026a68aabe3af2e5b50">vk_mem_alloc.h</a></li>
<li>VmaAllocationInfo2&#160;:&#160;<a class="el" href="group__group__alloc.html#ga25ede29f830f326b8572a18ce879bf64">vk_mem_alloc.h</a></li>
<li>VmaAllocatorCreateFlagBits&#160;:&#160;<a class="el" href="group__group__init.html#gafd73b95e737ee7e76f827cb5472f559f">vk_mem_alloc.h</a></li>
<li>VmaAllocatorCreateFlags&#160;:&#160;<a class="el" href="group__group__init.html#gacfe6863e160722c2c1bbcf7573fddc4d">vk_mem_alloc.h</a></li>
<li>VmaAllocatorCreateInfo&#160;:&#160;<a class="el" href="group__group__init.html#gaad9652301d33759b83e52d4f3605a14a">vk_mem_alloc.h</a></li>
<li>VmaAllocatorInfo&#160;:&#160;<a class="el" href="group__group__init.html#ga1988031b0223fdbd564250fa1edd942c">vk_mem_alloc.h</a></li>
<li>VmaBudget&#160;:&#160;<a class="el" href="group__group__stats.html#gaa078667e71b1ef24e87a6a30d128381d">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#ga13415cc0b443353a7b5abda300b833fc">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationFlags&#160;:&#160;<a class="el" href="group__group__alloc.html#ga88a77cef37e5d3c4fc9eb328885d048d">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#ga2bf47f96bf92bed2a49461bd9af3acfa">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationMove&#160;:&#160;<a class="el" href="group__group__alloc.html#ga563f4b43d3e31ed603d80cacc9ba8589">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationMoveOperation&#160;:&#160;<a class="el" href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationPassMoveInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#gad6799e8e2b1527abfc84d33bc44aeaf5">vk_mem_alloc.h</a></li>
<li>VmaDefragmentationStats&#160;:&#160;<a class="el" href="group__group__alloc.html#gad94034192259c2e34a4d1c5e27810403">vk_mem_alloc.h</a></li>
<li>VmaDetailedStatistics&#160;:&#160;<a class="el" href="group__group__stats.html#ga9ab0c535a6ca655dc63b8609ab4b8394">vk_mem_alloc.h</a></li>
<li>VmaDeviceMemoryCallbacks&#160;:&#160;<a class="el" href="group__group__init.html#ga77692d3c8770ea8882d573206bd27b2b">vk_mem_alloc.h</a></li>
<li>VmaMemoryUsage&#160;:&#160;<a class="el" href="group__group__alloc.html#ga806e8499dde802e59eb72a1dc811c35f">vk_mem_alloc.h</a></li>
<li>VmaPoolCreateFlagBits&#160;:&#160;<a class="el" href="group__group__alloc.html#ga4d4f2efc2509157a9e4ecd4fd7942303">vk_mem_alloc.h</a></li>
<li>VmaPoolCreateFlags&#160;:&#160;<a class="el" href="group__group__alloc.html#ga2770e325ea42e087c1b91fdf46d0292a">vk_mem_alloc.h</a></li>
<li>VmaPoolCreateInfo&#160;:&#160;<a class="el" href="group__group__alloc.html#ga1017aa83489c0eee8d2163d2bf253f67">vk_mem_alloc.h</a></li>
<li>VmaStatistics&#160;:&#160;<a class="el" href="group__group__stats.html#gac94bd1a382a3922ddc8de3af4d3ddd06">vk_mem_alloc.h</a></li>
<li>VmaTotalStatistics&#160;:&#160;<a class="el" href="group__group__stats.html#ga68916e729e55d513f88ffafbadddb770">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga936815e64946a6b6d812d08d10184c23">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationCreateFlags&#160;:&#160;<a class="el" href="group__group__virtual.html#gae96ffc099bf898257fb19e9410ed08a7">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationCreateInfo&#160;:&#160;<a class="el" href="group__group__virtual.html#gac3c90d80bedc6847a41b82d0e2158c9e">vk_mem_alloc.h</a></li>
<li>VmaVirtualAllocationInfo&#160;:&#160;<a class="el" href="group__group__virtual.html#ga75bc33ff7cf18c98e101f570dc2a5ebc">vk_mem_alloc.h</a></li>
<li>VmaVirtualBlockCreateFlagBits&#160;:&#160;<a class="el" href="group__group__virtual.html#ga0860ba1c0a67178fae4aecb63a78573e">vk_mem_alloc.h</a></li>
<li>VmaVirtualBlockCreateFlags&#160;:&#160;<a class="el" href="group__group__virtual.html#ga4e49c2f0ab7f6b4868833e5bac78d91e">vk_mem_alloc.h</a></li>
<li>VmaVirtualBlockCreateInfo&#160;:&#160;<a class="el" href="group__group__virtual.html#ga4753d42d40217a3a652a3cdf253ad773">vk_mem_alloc.h</a></li>
<li>VmaVulkanFunctions&#160;:&#160;<a class="el" href="group__group__init.html#gabb0a8e3b5040d847571cca6c7f9a8074">vk_mem_alloc.h</a></li>
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<p>API elements related to the initialization and management of the entire library, especially <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object.
<a href="#details">More...</a></p>
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Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_device_memory_callbacks.html">VmaDeviceMemoryCallbacks</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set of callbacks that the library will call for <code>vkAllocateMemory</code> and <code>vkFreeMemory</code>. <a href="struct_vma_device_memory_callbacks.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_vulkan_functions.html">VmaVulkanFunctions</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointers to some Vulkan functions - a subset used by the library. <a href="struct_vma_vulkan_functions.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_allocator_create_info.html">VmaAllocatorCreateInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Description of a Allocator to be created. <a href="struct_vma_allocator_create_info.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_allocator_info.html">VmaAllocatorInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. <a href="struct_vma_allocator_info.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Represents main object of this library initialized. <a href="struct_vma_allocator.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:gafd73b95e737ee7e76f827cb5472f559f" id="r_gafd73b95e737ee7e76f827cb5472f559f"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c">VmaAllocatorCreateFlagBits</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gafd73b95e737ee7e76f827cb5472f559f">VmaAllocatorCreateFlagBits</a></td></tr>
<tr class="memdesc:gafd73b95e737ee7e76f827cb5472f559f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags for created <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a>. <br /></td></tr>
<tr class="separator:gafd73b95e737ee7e76f827cb5472f559f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gacfe6863e160722c2c1bbcf7573fddc4d" id="r_gacfe6863e160722c2c1bbcf7573fddc4d"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gacfe6863e160722c2c1bbcf7573fddc4d">VmaAllocatorCreateFlags</a></td></tr>
<tr class="memdesc:gacfe6863e160722c2c1bbcf7573fddc4d"><td class="mdescLeft">&#160;</td><td class="mdescRight">See <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c" title="Flags for created VmaAllocator.">VmaAllocatorCreateFlagBits</a>. <br /></td></tr>
<tr class="separator:gacfe6863e160722c2c1bbcf7573fddc4d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga7e1ed85f7799600b03ad51a77acc21f3" id="r_ga7e1ed85f7799600b03ad51a77acc21f3"><td class="memItemLeft" align="right" valign="top">typedef void(VKAPI_PTR *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga7e1ed85f7799600b03ad51a77acc21f3">PFN_vmaAllocateDeviceMemoryFunction</a>) (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size, void *pUserData)</td></tr>
<tr class="memdesc:ga7e1ed85f7799600b03ad51a77acc21f3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Callback function called after successful vkAllocateMemory. <br /></td></tr>
<tr class="separator:ga7e1ed85f7799600b03ad51a77acc21f3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga154ccaaf53dc2c36378f80f0c4f3679b" id="r_ga154ccaaf53dc2c36378f80f0c4f3679b"><td class="memItemLeft" align="right" valign="top">typedef void(VKAPI_PTR *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga154ccaaf53dc2c36378f80f0c4f3679b">PFN_vmaFreeDeviceMemoryFunction</a>) (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size, void *pUserData)</td></tr>
<tr class="memdesc:ga154ccaaf53dc2c36378f80f0c4f3679b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Callback function called before vkFreeMemory. <br /></td></tr>
<tr class="separator:ga154ccaaf53dc2c36378f80f0c4f3679b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga77692d3c8770ea8882d573206bd27b2b" id="r_ga77692d3c8770ea8882d573206bd27b2b"><td class="memItemLeft" align="right" valign="top">typedef struct VmaDeviceMemoryCallbacks&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga77692d3c8770ea8882d573206bd27b2b">VmaDeviceMemoryCallbacks</a></td></tr>
<tr class="memdesc:ga77692d3c8770ea8882d573206bd27b2b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set of callbacks that the library will call for <code>vkAllocateMemory</code> and <code>vkFreeMemory</code>. <br /></td></tr>
<tr class="separator:ga77692d3c8770ea8882d573206bd27b2b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gabb0a8e3b5040d847571cca6c7f9a8074" id="r_gabb0a8e3b5040d847571cca6c7f9a8074"><td class="memItemLeft" align="right" valign="top">typedef struct VmaVulkanFunctions&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gabb0a8e3b5040d847571cca6c7f9a8074">VmaVulkanFunctions</a></td></tr>
<tr class="memdesc:gabb0a8e3b5040d847571cca6c7f9a8074"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointers to some Vulkan functions - a subset used by the library. <br /></td></tr>
<tr class="separator:gabb0a8e3b5040d847571cca6c7f9a8074"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaad9652301d33759b83e52d4f3605a14a" id="r_gaad9652301d33759b83e52d4f3605a14a"><td class="memItemLeft" align="right" valign="top">typedef struct VmaAllocatorCreateInfo&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaad9652301d33759b83e52d4f3605a14a">VmaAllocatorCreateInfo</a></td></tr>
<tr class="memdesc:gaad9652301d33759b83e52d4f3605a14a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Description of a Allocator to be created. <br /></td></tr>
<tr class="separator:gaad9652301d33759b83e52d4f3605a14a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga1988031b0223fdbd564250fa1edd942c" id="r_ga1988031b0223fdbd564250fa1edd942c"><td class="memItemLeft" align="right" valign="top">typedef struct VmaAllocatorInfo&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga1988031b0223fdbd564250fa1edd942c">VmaAllocatorInfo</a></td></tr>
<tr class="memdesc:ga1988031b0223fdbd564250fa1edd942c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. <br /></td></tr>
<tr class="separator:ga1988031b0223fdbd564250fa1edd942c"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="enum-members" name="enum-members"></a>
Enumerations</h2></td></tr>
<tr class="memitem:ga4f87c9100d154a65a4ad495f7763cf7c" id="r_ga4f87c9100d154a65a4ad495f7763cf7c"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c">VmaAllocatorCreateFlagBits</a> { <br />
&#160;&#160;<a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7ca4816ddaed324ba110172ca608a20f29d">VMA_ALLOCATOR_CREATE_EXTERNALLY_SYNCHRONIZED_BIT</a> = 0x00000001
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878">VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</a> = 0x00000002
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7ca8fb75bf07cd184ab903596295e863dee">VMA_ALLOCATOR_CREATE_KHR_BIND_MEMORY2_BIT</a> = 0x00000004
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0">VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT</a> = 0x00000008
, <br />
&#160;&#160;<a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7ca2acce4886d8078552efa38878413970f">VMA_ALLOCATOR_CREATE_AMD_DEVICE_COHERENT_MEMORY_BIT</a> = 0x00000010
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7ca5f1b28b0414319d1687e1f2b30ab0089">VMA_ALLOCATOR_CREATE_BUFFER_DEVICE_ADDRESS_BIT</a> = 0x00000020
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7caffdd7a5169be3dbd7cbf6b3619e4f78a">VMA_ALLOCATOR_CREATE_EXT_MEMORY_PRIORITY_BIT</a> = 0x00000040
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7caa2566e7f75e19ae7ec9c4fa509fea5fb">VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT</a> = 0x00000080
, <br />
&#160;&#160;<a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7caca82d4ce40bdb59d3da52a539c21d6b8">VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT</a> = 0x00000100
, <a class="el" href="#gga4f87c9100d154a65a4ad495f7763cf7cae4d5ad929caba5f23eb502b13bd5286c">VMA_ALLOCATOR_CREATE_FLAG_BITS_MAX_ENUM</a> = 0x7FFFFFFF
<br />
}</td></tr>
<tr class="memdesc:ga4f87c9100d154a65a4ad495f7763cf7c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags for created <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a>. <a href="#ga4f87c9100d154a65a4ad495f7763cf7c">More...</a><br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga200692051ddb34240248234f5f4c17bb" id="r_ga200692051ddb34240248234f5f4c17bb"><td class="memItemLeft" align="right" valign="top">VkResult&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a> (const <a class="el" href="struct_vma_allocator_create_info.html">VmaAllocatorCreateInfo</a> *pCreateInfo, <a class="el" href="struct_vma_allocator.html">VmaAllocator</a> *pAllocator)</td></tr>
<tr class="memdesc:ga200692051ddb34240248234f5f4c17bb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. <br /></td></tr>
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<tr class="memitem:gaa8d164061c88f22fb1fd3c8f3534bc1d" id="r_gaa8d164061c88f22fb1fd3c8f3534bc1d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaa8d164061c88f22fb1fd3c8f3534bc1d">vmaDestroyAllocator</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator)</td></tr>
<tr class="memdesc:gaa8d164061c88f22fb1fd3c8f3534bc1d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destroys allocator object. <br /></td></tr>
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<tr class="memitem:gafa02231a791b37255720d566a52683e7" id="r_gafa02231a791b37255720d566a52683e7"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gafa02231a791b37255720d566a52683e7">vmaGetAllocatorInfo</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_allocator_info.html">VmaAllocatorInfo</a> *pAllocatorInfo)</td></tr>
<tr class="memdesc:gafa02231a791b37255720d566a52683e7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object - handle to Vulkan device etc. <br /></td></tr>
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<tr class="memitem:gaecabf7b6e91ea87d0316fa0a9e014fe0" id="r_gaecabf7b6e91ea87d0316fa0a9e014fe0"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaecabf7b6e91ea87d0316fa0a9e014fe0">vmaGetPhysicalDeviceProperties</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, const VkPhysicalDeviceProperties **ppPhysicalDeviceProperties)</td></tr>
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<tr class="memitem:gab88db292a17974f911182543fda52d19" id="r_gab88db292a17974f911182543fda52d19"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gab88db292a17974f911182543fda52d19">vmaGetMemoryProperties</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, const VkPhysicalDeviceMemoryProperties **ppPhysicalDeviceMemoryProperties)</td></tr>
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<tr class="memitem:ga8701444752eb5de4464adb5a2b514bca" id="r_ga8701444752eb5de4464adb5a2b514bca"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga8701444752eb5de4464adb5a2b514bca">vmaGetMemoryTypeProperties</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t memoryTypeIndex, VkMemoryPropertyFlags *pFlags)</td></tr>
<tr class="memdesc:ga8701444752eb5de4464adb5a2b514bca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Given Memory Type Index, returns Property Flags of this memory type. <br /></td></tr>
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<tr class="memitem:gade56bf8dc9f5a5eaddf5f119ed525236" id="r_gade56bf8dc9f5a5eaddf5f119ed525236"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gade56bf8dc9f5a5eaddf5f119ed525236">vmaSetCurrentFrameIndex</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t frameIndex)</td></tr>
<tr class="memdesc:gade56bf8dc9f5a5eaddf5f119ed525236"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets index of the current frame. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>API elements related to the initialization and management of the entire library, especially <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. </p>
<h2 class="groupheader">Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga7e1ed85f7799600b03ad51a77acc21f3">&#9670;&#160;</a></span>PFN_vmaAllocateDeviceMemoryFunction</h2>
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<td class="memname">typedef void(VKAPI_PTR * PFN_vmaAllocateDeviceMemoryFunction) (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size, void *pUserData)</td>
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<p>Callback function called after successful vkAllocateMemory. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga154ccaaf53dc2c36378f80f0c4f3679b">&#9670;&#160;</a></span>PFN_vmaFreeDeviceMemoryFunction</h2>
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<td class="memname">typedef void(VKAPI_PTR * PFN_vmaFreeDeviceMemoryFunction) (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size, void *pUserData)</td>
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<p>Callback function called before vkFreeMemory. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gafd73b95e737ee7e76f827cb5472f559f">&#9670;&#160;</a></span>VmaAllocatorCreateFlagBits</h2>
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<td class="memname">typedef enum <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c">VmaAllocatorCreateFlagBits</a> <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c">VmaAllocatorCreateFlagBits</a></td>
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<p>Flags for created <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gacfe6863e160722c2c1bbcf7573fddc4d">&#9670;&#160;</a></span>VmaAllocatorCreateFlags</h2>
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<td class="memname">typedef VkFlags <a class="el" href="#gacfe6863e160722c2c1bbcf7573fddc4d">VmaAllocatorCreateFlags</a></td>
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<p>See <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c" title="Flags for created VmaAllocator.">VmaAllocatorCreateFlagBits</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaad9652301d33759b83e52d4f3605a14a">&#9670;&#160;</a></span>VmaAllocatorCreateInfo</h2>
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<td class="memname">typedef struct VmaAllocatorCreateInfo VmaAllocatorCreateInfo</td>
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<p>Description of a Allocator to be created. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga1988031b0223fdbd564250fa1edd942c">&#9670;&#160;</a></span>VmaAllocatorInfo</h2>
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<td class="memname">typedef struct VmaAllocatorInfo VmaAllocatorInfo</td>
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<p>Information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga77692d3c8770ea8882d573206bd27b2b">&#9670;&#160;</a></span>VmaDeviceMemoryCallbacks</h2>
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<td class="memname">typedef struct VmaDeviceMemoryCallbacks VmaDeviceMemoryCallbacks</td>
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<p>Set of callbacks that the library will call for <code>vkAllocateMemory</code> and <code>vkFreeMemory</code>. </p>
<p>Provided for informative purpose, e.g. to gather statistics about number of allocations or total amount of memory allocated in Vulkan.</p>
<p>Used in <a class="el" href="struct_vma_allocator_create_info.html#af1380969b5e1ea4c3184a877892d260e" title="Informative callbacks for vkAllocateMemory, vkFreeMemory. Optional.">VmaAllocatorCreateInfo::pDeviceMemoryCallbacks</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gabb0a8e3b5040d847571cca6c7f9a8074">&#9670;&#160;</a></span>VmaVulkanFunctions</h2>
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<td class="memname">typedef struct VmaVulkanFunctions VmaVulkanFunctions</td>
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<p>Pointers to some Vulkan functions - a subset used by the library. </p>
<p>Used in <a class="el" href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd" title="Pointers to Vulkan functions. Can be null.">VmaAllocatorCreateInfo::pVulkanFunctions</a>. </p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga4f87c9100d154a65a4ad495f7763cf7c">&#9670;&#160;</a></span>VmaAllocatorCreateFlagBits</h2>
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<td class="memname">enum <a class="el" href="#ga4f87c9100d154a65a4ad495f7763cf7c">VmaAllocatorCreateFlagBits</a></td>
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<p>Flags for created <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a>. </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7ca4816ddaed324ba110172ca608a20f29d" name="gga4f87c9100d154a65a4ad495f7763cf7ca4816ddaed324ba110172ca608a20f29d"></a>VMA_ALLOCATOR_CREATE_EXTERNALLY_SYNCHRONIZED_BIT&#160;</td><td class="fielddoc"><p>Allocator and all objects created from it will not be synchronized internally, so you must guarantee they are used from only one thread at a time or synchronized externally by you. </p>
<p>Using this flag may increase performance because internal mutexes are not used. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878" name="gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878"></a>VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_KHR_dedicated_allocation extension. </p>
<p>The flag works only if <a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285" title="Optional. Vulkan version that the application uses.">VmaAllocatorCreateInfo::vulkanApiVersion</a> <code>== VK_API_VERSION_1_0</code>. When it is <code>VK_API_VERSION_1_1</code>, the flag is ignored because the extension has been promoted to Vulkan 1.1.</p>
<p>Using this extension will automatically allocate dedicated blocks of memory for some buffers and images instead of suballocating place for them out of bigger memory blocks (as if you explicitly used <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a> flag) when it is recommended by the driver. It may improve performance on some GPUs.</p>
<p>You may set this flag only if you found out that following device extensions are supported, you enabled them while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>, and you want them to be used internally by this library:</p>
<ul>
<li>VK_KHR_get_memory_requirements2 (device extension)</li>
<li>VK_KHR_dedicated_allocation (device extension)</li>
</ul>
<p>When this flag is set, you can experience following warnings reported by Vulkan validation layer. You can ignore them.</p>
<blockquote class="doxtable">
<p>&zwj;vkBindBufferMemory(): Binding memory to buffer 0x2d but vkGetBufferMemoryRequirements() has not been called on that buffer. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7ca8fb75bf07cd184ab903596295e863dee" name="gga4f87c9100d154a65a4ad495f7763cf7ca8fb75bf07cd184ab903596295e863dee"></a>VMA_ALLOCATOR_CREATE_KHR_BIND_MEMORY2_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_KHR_bind_memory2 extension.</p>
<p>The flag works only if <a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285" title="Optional. Vulkan version that the application uses.">VmaAllocatorCreateInfo::vulkanApiVersion</a> <code>== VK_API_VERSION_1_0</code>. When it is <code>VK_API_VERSION_1_1</code>, the flag is ignored because the extension has been promoted to Vulkan 1.1.</p>
<p>You may set this flag only if you found out that this device extension is supported, you enabled it while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>, and you want it to be used internally by this library.</p>
<p>The extension provides functions <code>vkBindBufferMemory2KHR</code> and <code>vkBindImageMemory2KHR</code>, which allow to pass a chain of <code>pNext</code> structures while binding. This flag is required if you use <code>pNext</code> parameter in <a class="el" href="group__group__alloc.html#ga861f4f27189a7d11ab9d9eedc825cb6b" title="Binds buffer to allocation with additional parameters.">vmaBindBufferMemory2()</a> or <a class="el" href="group__group__alloc.html#ga5f3502dd7d38b53fb1533ea3921d038d" title="Binds image to allocation with additional parameters.">vmaBindImageMemory2()</a>. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0" name="gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0"></a>VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_EXT_memory_budget extension.</p>
<p>You may set this flag only if you found out that this device extension is supported, you enabled it while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>, and you want it to be used internally by this library, along with another instance extension VK_KHR_get_physical_device_properties2, which is required by it (or Vulkan 1.1, where this extension is promoted).</p>
<p>The extension provides query for current memory usage and budget, which will probably be more accurate than an estimation used by the library otherwise. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7ca2acce4886d8078552efa38878413970f" name="gga4f87c9100d154a65a4ad495f7763cf7ca2acce4886d8078552efa38878413970f"></a>VMA_ALLOCATOR_CREATE_AMD_DEVICE_COHERENT_MEMORY_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_AMD_device_coherent_memory extension.</p>
<p>You may set this flag only if you:</p>
<ul>
<li>found out that this device extension is supported and enabled it while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>,</li>
<li>checked that <code>VkPhysicalDeviceCoherentMemoryFeaturesAMD::deviceCoherentMemory</code> is true and set it while creating the Vulkan device,</li>
<li>want it to be used internally by this library.</li>
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<p>The extension and accompanying device feature provide access to memory types with <code>VK_MEMORY_PROPERTY_DEVICE_COHERENT_BIT_AMD</code> and <code>VK_MEMORY_PROPERTY_DEVICE_UNCACHED_BIT_AMD</code> flags. They are useful mostly for writing breadcrumb markers - a common method for debugging GPU crash/hang/TDR.</p>
<p>When the extension is not enabled, such memory types are still enumerated, but their usage is illegal. To protect from this error, if you don't create the allocator with this flag, it will refuse to allocate any memory or create a custom pool in such memory type, returning <code>VK_ERROR_FEATURE_NOT_PRESENT</code>. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7ca5f1b28b0414319d1687e1f2b30ab0089" name="gga4f87c9100d154a65a4ad495f7763cf7ca5f1b28b0414319d1687e1f2b30ab0089"></a>VMA_ALLOCATOR_CREATE_BUFFER_DEVICE_ADDRESS_BIT&#160;</td><td class="fielddoc"><p>Enables usage of "buffer device address" feature, which allows you to use function <code>vkGetBufferDeviceAddress*</code> to get raw GPU pointer to a buffer and pass it for usage inside a shader.</p>
<p>You may set this flag only if you:</p>
<ol type="1">
<li>(For Vulkan version &lt; 1.2) Found as available and enabled device extension VK_KHR_buffer_device_address. This extension is promoted to core Vulkan 1.2.</li>
<li>Found as available and enabled device feature <code>VkPhysicalDeviceBufferDeviceAddressFeatures::bufferDeviceAddress</code>.</li>
</ol>
<p>When this flag is set, you can create buffers with <code>VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT</code> using VMA. The library automatically adds <code>VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT</code> to allocated memory blocks wherever it might be needed.</p>
<p>For more information, see documentation chapter <a class="el" href="enabling_buffer_device_address.html">Enabling buffer device address</a>. </p>
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<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7caffdd7a5169be3dbd7cbf6b3619e4f78a" name="gga4f87c9100d154a65a4ad495f7763cf7caffdd7a5169be3dbd7cbf6b3619e4f78a"></a>VMA_ALLOCATOR_CREATE_EXT_MEMORY_PRIORITY_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_EXT_memory_priority extension in the library.</p>
<p>You may set this flag only if you found available and enabled this device extension, along with <code>VkPhysicalDeviceMemoryPriorityFeaturesEXT::memoryPriority == VK_TRUE</code>, while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>.</p>
<p>When this flag is used, <a class="el" href="struct_vma_allocation_create_info.html#a983d39e1a2e63649d78a960aa2fdd0f7" title="A floating-point value between 0 and 1, indicating the priority of the allocation relative to other m...">VmaAllocationCreateInfo::priority</a> and <a class="el" href="struct_vma_pool_create_info.html#a16e686c688f6725f119ebf6e24ab5274" title="A floating-point value between 0 and 1, indicating the priority of the allocations in this pool relat...">VmaPoolCreateInfo::priority</a> are used to set priorities of allocated Vulkan memory. Without it, these variables are ignored.</p>
<p>A priority must be a floating-point value between 0 and 1, indicating the priority of the allocation relative to other memory allocations. Larger values are higher priority. The granularity of the priorities is implementation-dependent. It is automatically passed to every call to <code>vkAllocateMemory</code> done by the library using structure <code>VkMemoryPriorityAllocateInfoEXT</code>. The value to be used for default priority is 0.5. For more details, see the documentation of the VK_EXT_memory_priority extension. </p>
</td></tr>
<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7caa2566e7f75e19ae7ec9c4fa509fea5fb" name="gga4f87c9100d154a65a4ad495f7763cf7caa2566e7f75e19ae7ec9c4fa509fea5fb"></a>VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_KHR_maintenance4 extension in the library.</p>
<p>You may set this flag only if you found available and enabled this device extension, while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>. </p>
</td></tr>
<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7caca82d4ce40bdb59d3da52a539c21d6b8" name="gga4f87c9100d154a65a4ad495f7763cf7caca82d4ce40bdb59d3da52a539c21d6b8"></a>VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT&#160;</td><td class="fielddoc"><p>Enables usage of VK_KHR_maintenance5 extension in the library.</p>
<p>You should set this flag if you found available and enabled this device extension, while creating Vulkan device passed as <a class="el" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500" title="Vulkan device.">VmaAllocatorCreateInfo::device</a>. </p>
</td></tr>
<tr><td class="fieldname"><a id="gga4f87c9100d154a65a4ad495f7763cf7cae4d5ad929caba5f23eb502b13bd5286c" name="gga4f87c9100d154a65a4ad495f7763cf7cae4d5ad929caba5f23eb502b13bd5286c"></a>VMA_ALLOCATOR_CREATE_FLAG_BITS_MAX_ENUM&#160;</td><td class="fielddoc"></td></tr>
</table>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga200692051ddb34240248234f5f4c17bb" name="ga200692051ddb34240248234f5f4c17bb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga200692051ddb34240248234f5f4c17bb">&#9670;&#160;</a></span>vmaCreateAllocator()</h2>
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<td class="memname">VkResult vmaCreateAllocator </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="struct_vma_allocator_create_info.html">VmaAllocatorCreateInfo</a> *</td> <td class="paramname"><span class="paramname"><em>pCreateInfo</em>, </span></td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a> *</td> <td class="paramname"><span class="paramname"><em>pAllocator</em></span>&#160;)</td>
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<p>Creates <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaa8d164061c88f22fb1fd3c8f3534bc1d">&#9670;&#160;</a></span>vmaDestroyAllocator()</h2>
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<td class="memname">void vmaDestroyAllocator </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em></span></td><td>)</td>
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<p>Destroys allocator object. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gafa02231a791b37255720d566a52683e7">&#9670;&#160;</a></span>vmaGetAllocatorInfo()</h2>
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<td class="memname">void vmaGetAllocatorInfo </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_allocator_info.html">VmaAllocatorInfo</a> *</td> <td class="paramname"><span class="paramname"><em>pAllocatorInfo</em></span>&#160;)</td>
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<p>Returns information about existing <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object - handle to Vulkan device etc. </p>
<p>It might be useful if you want to keep just the <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> handle and fetch other required handles to <code>VkPhysicalDevice</code>, <code>VkDevice</code> etc. every time using this function. </p>
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<a id="gab88db292a17974f911182543fda52d19" name="gab88db292a17974f911182543fda52d19"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gab88db292a17974f911182543fda52d19">&#9670;&#160;</a></span>vmaGetMemoryProperties()</h2>
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<td class="memname">void vmaGetMemoryProperties </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype">const VkPhysicalDeviceMemoryProperties **</td> <td class="paramname"><span class="paramname"><em>ppPhysicalDeviceMemoryProperties</em></span>&#160;)</td>
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<p>PhysicalDeviceMemoryProperties are fetched from physicalDevice by the allocator. You can access it here, without fetching it again on your own. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga8701444752eb5de4464adb5a2b514bca">&#9670;&#160;</a></span>vmaGetMemoryTypeProperties()</h2>
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<td class="memname">void vmaGetMemoryTypeProperties </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype">uint32_t</td> <td class="paramname"><span class="paramname"><em>memoryTypeIndex</em>, </span></td>
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<td class="paramtype">VkMemoryPropertyFlags *</td> <td class="paramname"><span class="paramname"><em>pFlags</em></span>&#160;)</td>
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<p>Given Memory Type Index, returns Property Flags of this memory type. </p>
<p>This is just a convenience function. Same information can be obtained using <a class="el" href="#gab88db292a17974f911182543fda52d19">vmaGetMemoryProperties()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gaecabf7b6e91ea87d0316fa0a9e014fe0">&#9670;&#160;</a></span>vmaGetPhysicalDeviceProperties()</h2>
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<td class="memname">void vmaGetPhysicalDeviceProperties </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype">const VkPhysicalDeviceProperties **</td> <td class="paramname"><span class="paramname"><em>ppPhysicalDeviceProperties</em></span>&#160;)</td>
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<p>PhysicalDeviceProperties are fetched from physicalDevice by the allocator. You can access it here, without fetching it again on your own. </p>
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<a id="gade56bf8dc9f5a5eaddf5f119ed525236" name="gade56bf8dc9f5a5eaddf5f119ed525236"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gade56bf8dc9f5a5eaddf5f119ed525236">&#9670;&#160;</a></span>vmaSetCurrentFrameIndex()</h2>
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<td class="memname">void vmaSetCurrentFrameIndex </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype">uint32_t</td> <td class="paramname"><span class="paramname"><em>frameIndex</em></span>&#160;)</td>
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<p>Sets index of the current frame. </p>
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<p>API elements that query current status of the allocator, from memory usage, budget, to full dump of the internal state in JSON format. See documentation chapter: <a class="el" href="statistics.html">Statistics</a>.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_statistics.html">VmaStatistics</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool, or total. <a href="struct_vma_statistics.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_detailed_statistics.html">VmaDetailedStatistics</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">More detailed statistics than <a class="el" href="struct_vma_statistics.html" title="Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...">VmaStatistics</a>. <a href="struct_vma_detailed_statistics.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_total_statistics.html">VmaTotalStatistics</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">General statistics from current state of the Allocator - total memory usage across all memory heaps and types. <a href="struct_vma_total_statistics.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_budget.html">VmaBudget</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Statistics of current memory usage and available budget for a specific memory heap. <a href="struct_vma_budget.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:gac94bd1a382a3922ddc8de3af4d3ddd06" id="r_gac94bd1a382a3922ddc8de3af4d3ddd06"><td class="memItemLeft" align="right" valign="top">typedef struct VmaStatistics&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gac94bd1a382a3922ddc8de3af4d3ddd06">VmaStatistics</a></td></tr>
<tr class="memdesc:gac94bd1a382a3922ddc8de3af4d3ddd06"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool, or total. <br /></td></tr>
<tr class="separator:gac94bd1a382a3922ddc8de3af4d3ddd06"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga9ab0c535a6ca655dc63b8609ab4b8394" id="r_ga9ab0c535a6ca655dc63b8609ab4b8394"><td class="memItemLeft" align="right" valign="top">typedef struct VmaDetailedStatistics&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga9ab0c535a6ca655dc63b8609ab4b8394">VmaDetailedStatistics</a></td></tr>
<tr class="memdesc:ga9ab0c535a6ca655dc63b8609ab4b8394"><td class="mdescLeft">&#160;</td><td class="mdescRight">More detailed statistics than <a class="el" href="struct_vma_statistics.html" title="Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...">VmaStatistics</a>. <br /></td></tr>
<tr class="separator:ga9ab0c535a6ca655dc63b8609ab4b8394"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga68916e729e55d513f88ffafbadddb770" id="r_ga68916e729e55d513f88ffafbadddb770"><td class="memItemLeft" align="right" valign="top">typedef struct VmaTotalStatistics&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga68916e729e55d513f88ffafbadddb770">VmaTotalStatistics</a></td></tr>
<tr class="memdesc:ga68916e729e55d513f88ffafbadddb770"><td class="mdescLeft">&#160;</td><td class="mdescRight">General statistics from current state of the Allocator - total memory usage across all memory heaps and types. <br /></td></tr>
<tr class="separator:ga68916e729e55d513f88ffafbadddb770"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaa078667e71b1ef24e87a6a30d128381d" id="r_gaa078667e71b1ef24e87a6a30d128381d"><td class="memItemLeft" align="right" valign="top">typedef struct VmaBudget&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaa078667e71b1ef24e87a6a30d128381d">VmaBudget</a></td></tr>
<tr class="memdesc:gaa078667e71b1ef24e87a6a30d128381d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Statistics of current memory usage and available budget for a specific memory heap. <br /></td></tr>
<tr class="separator:gaa078667e71b1ef24e87a6a30d128381d"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga36f3484de7aa6cd6edc4de9edfa0ff59" id="r_ga36f3484de7aa6cd6edc4de9edfa0ff59"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga36f3484de7aa6cd6edc4de9edfa0ff59">vmaCalculateStatistics</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_total_statistics.html">VmaTotalStatistics</a> *pStats)</td></tr>
<tr class="memdesc:ga36f3484de7aa6cd6edc4de9edfa0ff59"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves statistics from current state of the Allocator. <br /></td></tr>
<tr class="separator:ga36f3484de7aa6cd6edc4de9edfa0ff59"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga9f88db9d46a432c0ad7278cecbc5eaa7" id="r_ga9f88db9d46a432c0ad7278cecbc5eaa7"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga9f88db9d46a432c0ad7278cecbc5eaa7">vmaGetHeapBudgets</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_budget.html">VmaBudget</a> *pBudgets)</td></tr>
<tr class="memdesc:ga9f88db9d46a432c0ad7278cecbc5eaa7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves information about current memory usage and budget for all memory heaps. <br /></td></tr>
<tr class="separator:ga9f88db9d46a432c0ad7278cecbc5eaa7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga34d8e7d83774eed0caee5c5ae88e217d" id="r_ga34d8e7d83774eed0caee5c5ae88e217d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga34d8e7d83774eed0caee5c5ae88e217d">vmaGetPoolStatistics</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_pool.html">VmaPool</a> pool, <a class="el" href="struct_vma_statistics.html">VmaStatistics</a> *pPoolStats)</td></tr>
<tr class="memdesc:ga34d8e7d83774eed0caee5c5ae88e217d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves statistics of existing <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> object. <br /></td></tr>
<tr class="separator:ga34d8e7d83774eed0caee5c5ae88e217d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga50ba0eb25d2b363b792be4645ca7a380" id="r_ga50ba0eb25d2b363b792be4645ca7a380"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga50ba0eb25d2b363b792be4645ca7a380">vmaCalculatePoolStatistics</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_pool.html">VmaPool</a> pool, <a class="el" href="struct_vma_detailed_statistics.html">VmaDetailedStatistics</a> *pPoolStats)</td></tr>
<tr class="memdesc:ga50ba0eb25d2b363b792be4645ca7a380"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves detailed statistics of existing <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> object. <br /></td></tr>
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<tr class="memitem:ga52d810e1222c592e5d80556ad005f1e6" id="r_ga52d810e1222c592e5d80556ad005f1e6"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga52d810e1222c592e5d80556ad005f1e6">vmaBuildVirtualBlockStatsString</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, char **ppStatsString, VkBool32 detailedMap)</td></tr>
<tr class="memdesc:ga52d810e1222c592e5d80556ad005f1e6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Builds and returns a null-terminated string in JSON format with information about given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<tr class="memitem:ga47fb8d8aa69df4a7c23a9719b4080623" id="r_ga47fb8d8aa69df4a7c23a9719b4080623"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga47fb8d8aa69df4a7c23a9719b4080623">vmaFreeVirtualBlockStatsString</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, char *pStatsString)</td></tr>
<tr class="memdesc:ga47fb8d8aa69df4a7c23a9719b4080623"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees a string returned by <a class="el" href="#ga52d810e1222c592e5d80556ad005f1e6" title="Builds and returns a null-terminated string in JSON format with information about given VmaVirtualBlo...">vmaBuildVirtualBlockStatsString()</a>. <br /></td></tr>
<tr class="separator:ga47fb8d8aa69df4a7c23a9719b4080623"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaa4fee7eb5253377599ef4fd38c93c2a0" id="r_gaa4fee7eb5253377599ef4fd38c93c2a0"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaa4fee7eb5253377599ef4fd38c93c2a0">vmaBuildStatsString</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, char **ppStatsString, VkBool32 detailedMap)</td></tr>
<tr class="memdesc:gaa4fee7eb5253377599ef4fd38c93c2a0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Builds and returns statistics as a null-terminated string in JSON format. <br /></td></tr>
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<tr class="memitem:ga3104eb30d8122c84dd8541063f145288" id="r_ga3104eb30d8122c84dd8541063f145288"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga3104eb30d8122c84dd8541063f145288">vmaFreeStatsString</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, char *pStatsString)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>API elements that query current status of the allocator, from memory usage, budget, to full dump of the internal state in JSON format. See documentation chapter: <a class="el" href="statistics.html">Statistics</a>. </p>
<h2 class="groupheader">Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#gaa078667e71b1ef24e87a6a30d128381d">&#9670;&#160;</a></span>VmaBudget</h2>
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<td class="memname">typedef struct VmaBudget VmaBudget</td>
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<p>Statistics of current memory usage and available budget for a specific memory heap. </p>
<p>These are fast to calculate. See function <a class="el" href="#ga9f88db9d46a432c0ad7278cecbc5eaa7" title="Retrieves information about current memory usage and budget for all memory heaps.">vmaGetHeapBudgets()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga9ab0c535a6ca655dc63b8609ab4b8394">&#9670;&#160;</a></span>VmaDetailedStatistics</h2>
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<td class="memname">typedef struct VmaDetailedStatistics VmaDetailedStatistics</td>
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<p>More detailed statistics than <a class="el" href="struct_vma_statistics.html" title="Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...">VmaStatistics</a>. </p>
<p>These are slower to calculate. Use for debugging purposes. See functions: <a class="el" href="#ga36f3484de7aa6cd6edc4de9edfa0ff59" title="Retrieves statistics from current state of the Allocator.">vmaCalculateStatistics()</a>, <a class="el" href="#ga50ba0eb25d2b363b792be4645ca7a380" title="Retrieves detailed statistics of existing VmaPool object.">vmaCalculatePoolStatistics()</a>.</p>
<p>Previous version of the statistics API provided averages, but they have been removed because they can be easily calculated as:</p>
<div class="fragment"><div class="line">VkDeviceSize allocationSizeAvg = detailedStats.statistics.allocationBytes / detailedStats.statistics.allocationCount;</div>
<div class="line">VkDeviceSize unusedBytes = detailedStats.statistics.blockBytes - detailedStats.statistics.allocationBytes;</div>
<div class="line">VkDeviceSize unusedRangeSizeAvg = unusedBytes / detailedStats.unusedRangeCount;</div>
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<h2 class="memtitle"><span class="permalink"><a href="#gac94bd1a382a3922ddc8de3af4d3ddd06">&#9670;&#160;</a></span>VmaStatistics</h2>
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<td class="memname">typedef struct VmaStatistics VmaStatistics</td>
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<p>Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool, or total. </p>
<p>These are fast to calculate. See functions: <a class="el" href="#ga9f88db9d46a432c0ad7278cecbc5eaa7" title="Retrieves information about current memory usage and budget for all memory heaps.">vmaGetHeapBudgets()</a>, <a class="el" href="#ga34d8e7d83774eed0caee5c5ae88e217d" title="Retrieves statistics of existing VmaPool object.">vmaGetPoolStatistics()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga68916e729e55d513f88ffafbadddb770">&#9670;&#160;</a></span>VmaTotalStatistics</h2>
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<td class="memname">typedef struct VmaTotalStatistics VmaTotalStatistics</td>
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<p>General statistics from current state of the Allocator - total memory usage across all memory heaps and types. </p>
<p>These are slower to calculate. Use for debugging purposes. See function <a class="el" href="#ga36f3484de7aa6cd6edc4de9edfa0ff59" title="Retrieves statistics from current state of the Allocator.">vmaCalculateStatistics()</a>. </p>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#gaa4fee7eb5253377599ef4fd38c93c2a0">&#9670;&#160;</a></span>vmaBuildStatsString()</h2>
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<td class="memname">void vmaBuildStatsString </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype">char **</td> <td class="paramname"><span class="paramname"><em>ppStatsString</em>, </span></td>
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<td class="paramtype">VkBool32</td> <td class="paramname"><span class="paramname"><em>detailedMap</em></span>&#160;)</td>
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<p>Builds and returns statistics as a null-terminated string in JSON format. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">allocator</td><td></td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">ppStatsString</td><td>Must be freed using <a class="el" href="#ga3104eb30d8122c84dd8541063f145288">vmaFreeStatsString()</a> function. </td></tr>
<tr><td class="paramdir"></td><td class="paramname">detailedMap</td><td></td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#ga52d810e1222c592e5d80556ad005f1e6">&#9670;&#160;</a></span>vmaBuildVirtualBlockStatsString()</h2>
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<td class="memname">void vmaBuildVirtualBlockStatsString </td>
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<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
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<td class="paramtype">char **</td> <td class="paramname"><span class="paramname"><em>ppStatsString</em>, </span></td>
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<td class="paramtype">VkBool32</td> <td class="paramname"><span class="paramname"><em>detailedMap</em></span>&#160;)</td>
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<p>Builds and returns a null-terminated string in JSON format with information about given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir"></td><td class="paramname">virtualBlock</td><td>Virtual block. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">ppStatsString</td><td>Returned string. </td></tr>
<tr><td class="paramdir"></td><td class="paramname">detailedMap</td><td>Pass <code>VK_FALSE</code> to only obtain statistics as returned by <a class="el" href="group__group__virtual.html#ga93c5741bca44b43e5b849cacbd616098" title="Calculates and returns detailed statistics about virtual allocations and memory usage in given VmaVir...">vmaCalculateVirtualBlockStatistics()</a>. Pass <code>VK_TRUE</code> to also obtain full list of allocations and free spaces.</td></tr>
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<p>Returned string must be freed using <a class="el" href="#ga47fb8d8aa69df4a7c23a9719b4080623" title="Frees a string returned by vmaBuildVirtualBlockStatsString().">vmaFreeVirtualBlockStatsString()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga50ba0eb25d2b363b792be4645ca7a380">&#9670;&#160;</a></span>vmaCalculatePoolStatistics()</h2>
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<td class="memname">void vmaCalculatePoolStatistics </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype"><a class="el" href="struct_vma_pool.html">VmaPool</a></td> <td class="paramname"><span class="paramname"><em>pool</em>, </span></td>
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<td class="paramtype"><a class="el" href="struct_vma_detailed_statistics.html">VmaDetailedStatistics</a> *</td> <td class="paramname"><span class="paramname"><em>pPoolStats</em></span>&#160;)</td>
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<p>Retrieves detailed statistics of existing <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> object. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">allocator</td><td>Allocator object. </td></tr>
<tr><td class="paramdir"></td><td class="paramname">pool</td><td>Pool object. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pPoolStats</td><td>Statistics of specified pool. </td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#ga36f3484de7aa6cd6edc4de9edfa0ff59">&#9670;&#160;</a></span>vmaCalculateStatistics()</h2>
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<td class="memname">void vmaCalculateStatistics </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype"><a class="el" href="struct_vma_total_statistics.html">VmaTotalStatistics</a> *</td> <td class="paramname"><span class="paramname"><em>pStats</em></span>&#160;)</td>
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<p>Retrieves statistics from current state of the Allocator. </p>
<p>This function is called "calculate" not "get" because it has to traverse all internal data structures, so it may be quite slow. Use it for debugging purposes. For faster but more brief statistics suitable to be called every frame or every allocation, use <a class="el" href="#ga9f88db9d46a432c0ad7278cecbc5eaa7" title="Retrieves information about current memory usage and budget for all memory heaps.">vmaGetHeapBudgets()</a>.</p>
<p>Note that when using allocator from multiple threads, returned information may immediately become outdated. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga3104eb30d8122c84dd8541063f145288">&#9670;&#160;</a></span>vmaFreeStatsString()</h2>
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<td class="memname">void vmaFreeStatsString </td>
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<td class="paramtype">char *</td> <td class="paramname"><span class="paramname"><em>pStatsString</em></span>&#160;)</td>
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<h2 class="memtitle"><span class="permalink"><a href="#ga47fb8d8aa69df4a7c23a9719b4080623">&#9670;&#160;</a></span>vmaFreeVirtualBlockStatsString()</h2>
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<td class="memname">void vmaFreeVirtualBlockStatsString </td>
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<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
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<td class="paramtype">char *</td> <td class="paramname"><span class="paramname"><em>pStatsString</em></span>&#160;)</td>
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<p>Frees a string returned by <a class="el" href="#ga52d810e1222c592e5d80556ad005f1e6" title="Builds and returns a null-terminated string in JSON format with information about given VmaVirtualBlo...">vmaBuildVirtualBlockStatsString()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga9f88db9d46a432c0ad7278cecbc5eaa7">&#9670;&#160;</a></span>vmaGetHeapBudgets()</h2>
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<td class="memname">void vmaGetHeapBudgets </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramtype"><a class="el" href="struct_vma_budget.html">VmaBudget</a> *</td> <td class="paramname"><span class="paramname"><em>pBudgets</em></span>&#160;)</td>
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<p>Retrieves information about current memory usage and budget for all memory heaps. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">allocator</td><td></td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pBudgets</td><td>Must point to array with number of elements at least equal to number of memory heaps in physical device used.</td></tr>
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</dd>
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<p>This function is called "get" not "calculate" because it is very fast, suitable to be called every frame or every allocation. For more detailed statistics use <a class="el" href="#ga36f3484de7aa6cd6edc4de9edfa0ff59" title="Retrieves statistics from current state of the Allocator.">vmaCalculateStatistics()</a>.</p>
<p>Note that when using allocator from multiple threads, returned information may immediately become outdated. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga34d8e7d83774eed0caee5c5ae88e217d">&#9670;&#160;</a></span>vmaGetPoolStatistics()</h2>
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<td class="memname">void vmaGetPoolStatistics </td>
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<td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a></td> <td class="paramname"><span class="paramname"><em>allocator</em>, </span></td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_pool.html">VmaPool</a></td> <td class="paramname"><span class="paramname"><em>pool</em>, </span></td>
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<td></td>
<td class="paramtype"><a class="el" href="struct_vma_statistics.html">VmaStatistics</a> *</td> <td class="paramname"><span class="paramname"><em>pPoolStats</em></span>&#160;)</td>
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<p>Retrieves statistics of existing <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a> object. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">allocator</td><td>Allocator object. </td></tr>
<tr><td class="paramdir"></td><td class="paramname">pool</td><td>Pool object. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pPoolStats</td><td>Statistics of specified pool. </td></tr>
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</dd>
</dl>
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<div class="headertitle"><div class="title">Virtual allocator</div></div>
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<p>API elements related to the mechanism of <a class="el" href="virtual_allocator.html">Virtual allocator</a> - using the core allocation algorithm for user-defined purpose without allocating any real GPU memory.
<a href="#details">More...</a></p>
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Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_virtual_block_create_info.html">VmaVirtualBlockCreateInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of created <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object to be passed to <a class="el" href="#gab585754076877265fdae33e5c40ef13b" title="Creates new VmaVirtualBlock object.">vmaCreateVirtualBlock()</a>. <a href="struct_vma_virtual_block_create_info.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_virtual_allocation_create_info.html">VmaVirtualAllocationCreateInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of created virtual allocation to be passed to <a class="el" href="#ga6b7cdcc1c3e5103c323fedc4e1319e01" title="Allocates new virtual allocation inside given VmaVirtualBlock.">vmaVirtualAllocate()</a>. <a href="struct_vma_virtual_allocation_create_info.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_virtual_allocation_info.html">VmaVirtualAllocationInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of an existing virtual allocation, returned by <a class="el" href="#ga8ee14ceb1fe033ec84d8aa29e1f75afa" title="Returns information about a specific virtual allocation within a virtual block, like its size and pUs...">vmaGetVirtualAllocationInfo()</a>. <a href="struct_vma_virtual_allocation_info.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Represents single memory allocation done inside <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <a href="struct_vma_virtual_allocation.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Handle to a virtual block object that allows to use core allocation algorithm without allocating any real GPU memory. <a href="struct_vma_virtual_block.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:ga0860ba1c0a67178fae4aecb63a78573e" id="r_ga0860ba1c0a67178fae4aecb63a78573e"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga0860ba1c0a67178fae4aecb63a78573e">VmaVirtualBlockCreateFlagBits</a></td></tr>
<tr class="memdesc:ga0860ba1c0a67178fae4aecb63a78573e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. <br /></td></tr>
<tr class="separator:ga0860ba1c0a67178fae4aecb63a78573e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga4e49c2f0ab7f6b4868833e5bac78d91e" id="r_ga4e49c2f0ab7f6b4868833e5bac78d91e"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga4e49c2f0ab7f6b4868833e5bac78d91e">VmaVirtualBlockCreateFlags</a></td></tr>
<tr class="memdesc:ga4e49c2f0ab7f6b4868833e5bac78d91e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. See <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca" title="Flags to be passed as VmaVirtualBlockCreateInfo::flags.">VmaVirtualBlockCreateFlagBits</a>. <br /></td></tr>
<tr class="separator:ga4e49c2f0ab7f6b4868833e5bac78d91e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga936815e64946a6b6d812d08d10184c23" id="r_ga936815e64946a6b6d812d08d10184c23"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6">VmaVirtualAllocationCreateFlagBits</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga936815e64946a6b6d812d08d10184c23">VmaVirtualAllocationCreateFlagBits</a></td></tr>
<tr class="memdesc:ga936815e64946a6b6d812d08d10184c23"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. <br /></td></tr>
<tr class="separator:ga936815e64946a6b6d812d08d10184c23"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gae96ffc099bf898257fb19e9410ed08a7" id="r_gae96ffc099bf898257fb19e9410ed08a7"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gae96ffc099bf898257fb19e9410ed08a7">VmaVirtualAllocationCreateFlags</a></td></tr>
<tr class="memdesc:gae96ffc099bf898257fb19e9410ed08a7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. See <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6" title="Flags to be passed as VmaVirtualAllocationCreateInfo::flags.">VmaVirtualAllocationCreateFlagBits</a>. <br /></td></tr>
<tr class="separator:gae96ffc099bf898257fb19e9410ed08a7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga4753d42d40217a3a652a3cdf253ad773" id="r_ga4753d42d40217a3a652a3cdf253ad773"><td class="memItemLeft" align="right" valign="top">typedef struct VmaVirtualBlockCreateInfo&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga4753d42d40217a3a652a3cdf253ad773">VmaVirtualBlockCreateInfo</a></td></tr>
<tr class="memdesc:ga4753d42d40217a3a652a3cdf253ad773"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of created <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object to be passed to <a class="el" href="#gab585754076877265fdae33e5c40ef13b" title="Creates new VmaVirtualBlock object.">vmaCreateVirtualBlock()</a>. <br /></td></tr>
<tr class="separator:ga4753d42d40217a3a652a3cdf253ad773"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gac3c90d80bedc6847a41b82d0e2158c9e" id="r_gac3c90d80bedc6847a41b82d0e2158c9e"><td class="memItemLeft" align="right" valign="top">typedef struct VmaVirtualAllocationCreateInfo&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gac3c90d80bedc6847a41b82d0e2158c9e">VmaVirtualAllocationCreateInfo</a></td></tr>
<tr class="memdesc:gac3c90d80bedc6847a41b82d0e2158c9e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of created virtual allocation to be passed to <a class="el" href="#ga6b7cdcc1c3e5103c323fedc4e1319e01" title="Allocates new virtual allocation inside given VmaVirtualBlock.">vmaVirtualAllocate()</a>. <br /></td></tr>
<tr class="separator:gac3c90d80bedc6847a41b82d0e2158c9e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga75bc33ff7cf18c98e101f570dc2a5ebc" id="r_ga75bc33ff7cf18c98e101f570dc2a5ebc"><td class="memItemLeft" align="right" valign="top">typedef struct VmaVirtualAllocationInfo&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga75bc33ff7cf18c98e101f570dc2a5ebc">VmaVirtualAllocationInfo</a></td></tr>
<tr class="memdesc:ga75bc33ff7cf18c98e101f570dc2a5ebc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Parameters of an existing virtual allocation, returned by <a class="el" href="#ga8ee14ceb1fe033ec84d8aa29e1f75afa" title="Returns information about a specific virtual allocation within a virtual block, like its size and pUs...">vmaGetVirtualAllocationInfo()</a>. <br /></td></tr>
<tr class="separator:ga75bc33ff7cf18c98e101f570dc2a5ebc"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:ga88bcf8c1cd3bb1610ff7343811c65bca" id="r_ga88bcf8c1cd3bb1610ff7343811c65bca"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a> { <a class="el" href="#gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96">VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT</a> = 0x00000001
, <a class="el" href="#gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844">VMA_VIRTUAL_BLOCK_CREATE_ALGORITHM_MASK</a>
, <a class="el" href="#gga88bcf8c1cd3bb1610ff7343811c65bcaa5fc0d333c3d5687a8bbf57df9b377a87">VMA_VIRTUAL_BLOCK_CREATE_FLAG_BITS_MAX_ENUM</a> = 0x7FFFFFFF
}</td></tr>
<tr class="memdesc:ga88bcf8c1cd3bb1610ff7343811c65bca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. <a href="#ga88bcf8c1cd3bb1610ff7343811c65bca">More...</a><br /></td></tr>
<tr class="separator:ga88bcf8c1cd3bb1610ff7343811c65bca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2e9c64d405b14156fea7e10c4ad06cb6" id="r_ga2e9c64d405b14156fea7e10c4ad06cb6"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6">VmaVirtualAllocationCreateFlagBits</a> { <br />
&#160;&#160;<a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6a9524a329a55b5ec390d57d90b67ad78e">VMA_VIRTUAL_ALLOCATION_CREATE_UPPER_ADDRESS_BIT</a> = VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT
, <a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6ae2a9591a62b5e3b1bdcbc81c6188a1bf">VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT</a> = VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT
, <a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6a562d10a46012719d33167d3dc5dbbf9b">VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT</a> = VMA_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT
, <a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6a3bb82d2aedd587a64846a1d7778852e6">VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_OFFSET_BIT</a> = VMA_ALLOCATION_CREATE_STRATEGY_MIN_OFFSET_BIT
, <br />
&#160;&#160;<a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6ac5b5e45c335368d18df59c9f27df17e3">VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MASK</a> = VMA_ALLOCATION_CREATE_STRATEGY_MASK
, <a class="el" href="#gga2e9c64d405b14156fea7e10c4ad06cb6ac1163c03ea837fa663462dc286d6a1a9">VMA_VIRTUAL_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM</a> = 0x7FFFFFFF
<br />
}</td></tr>
<tr class="memdesc:ga2e9c64d405b14156fea7e10c4ad06cb6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. <a href="#ga2e9c64d405b14156fea7e10c4ad06cb6">More...</a><br /></td></tr>
<tr class="separator:ga2e9c64d405b14156fea7e10c4ad06cb6"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gab585754076877265fdae33e5c40ef13b" id="r_gab585754076877265fdae33e5c40ef13b"><td class="memItemLeft" align="right" valign="top">VkResult&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gab585754076877265fdae33e5c40ef13b">vmaCreateVirtualBlock</a> (const <a class="el" href="struct_vma_virtual_block_create_info.html">VmaVirtualBlockCreateInfo</a> *pCreateInfo, <a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> *pVirtualBlock)</td></tr>
<tr class="memdesc:gab585754076877265fdae33e5c40ef13b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates new <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object. <br /></td></tr>
<tr class="separator:gab585754076877265fdae33e5c40ef13b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga3795f7783ae2c182cede067d656f66a5" id="r_ga3795f7783ae2c182cede067d656f66a5"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga3795f7783ae2c182cede067d656f66a5">vmaDestroyVirtualBlock</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock)</td></tr>
<tr class="memdesc:ga3795f7783ae2c182cede067d656f66a5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Destroys <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object. <br /></td></tr>
<tr class="separator:ga3795f7783ae2c182cede067d656f66a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gacd53b5b1d23f8fcbad692ccfdc1811f1" id="r_gacd53b5b1d23f8fcbad692ccfdc1811f1"><td class="memItemLeft" align="right" valign="top">VkBool32&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gacd53b5b1d23f8fcbad692ccfdc1811f1">vmaIsVirtualBlockEmpty</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock)</td></tr>
<tr class="memdesc:gacd53b5b1d23f8fcbad692ccfdc1811f1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns true of the <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> is empty - contains 0 virtual allocations and has all its space available for new allocations. <br /></td></tr>
<tr class="separator:gacd53b5b1d23f8fcbad692ccfdc1811f1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga8ee14ceb1fe033ec84d8aa29e1f75afa" id="r_ga8ee14ceb1fe033ec84d8aa29e1f75afa"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga8ee14ceb1fe033ec84d8aa29e1f75afa">vmaGetVirtualAllocationInfo</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, <a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> allocation, <a class="el" href="struct_vma_virtual_allocation_info.html">VmaVirtualAllocationInfo</a> *pVirtualAllocInfo)</td></tr>
<tr class="memdesc:ga8ee14ceb1fe033ec84d8aa29e1f75afa"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about a specific virtual allocation within a virtual block, like its size and <code>pUserData</code> pointer. <br /></td></tr>
<tr class="separator:ga8ee14ceb1fe033ec84d8aa29e1f75afa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6b7cdcc1c3e5103c323fedc4e1319e01" id="r_ga6b7cdcc1c3e5103c323fedc4e1319e01"><td class="memItemLeft" align="right" valign="top">VkResult&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga6b7cdcc1c3e5103c323fedc4e1319e01">vmaVirtualAllocate</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, const <a class="el" href="struct_vma_virtual_allocation_create_info.html">VmaVirtualAllocationCreateInfo</a> *pCreateInfo, <a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> *pAllocation, VkDeviceSize *pOffset)</td></tr>
<tr class="memdesc:ga6b7cdcc1c3e5103c323fedc4e1319e01"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocates new virtual allocation inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<tr class="memitem:ga09fc688c0c3653ff23723b037e5d5033" id="r_ga09fc688c0c3653ff23723b037e5d5033"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga09fc688c0c3653ff23723b037e5d5033">vmaVirtualFree</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, <a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> allocation)</td></tr>
<tr class="memdesc:ga09fc688c0c3653ff23723b037e5d5033"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees virtual allocation inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<tr class="memitem:ga5eda6f55919fb05bd2f56a112590c571" id="r_ga5eda6f55919fb05bd2f56a112590c571"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga5eda6f55919fb05bd2f56a112590c571">vmaClearVirtualBlock</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock)</td></tr>
<tr class="memdesc:ga5eda6f55919fb05bd2f56a112590c571"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees all virtual allocations inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<tr class="memitem:ga001ea1850458a4062b829e09c303fca2" id="r_ga001ea1850458a4062b829e09c303fca2"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga001ea1850458a4062b829e09c303fca2">vmaSetVirtualAllocationUserData</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, <a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> allocation, void *pUserData)</td></tr>
<tr class="memdesc:ga001ea1850458a4062b829e09c303fca2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Changes custom pointer associated with given virtual allocation. <br /></td></tr>
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<tr class="memitem:ga2902aa3130866afcc64bb5f984113db3" id="r_ga2902aa3130866afcc64bb5f984113db3"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga2902aa3130866afcc64bb5f984113db3">vmaGetVirtualBlockStatistics</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, <a class="el" href="struct_vma_statistics.html">VmaStatistics</a> *pStats)</td></tr>
<tr class="memdesc:ga2902aa3130866afcc64bb5f984113db3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculates and returns statistics about virtual allocations and memory usage in given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<tr class="memitem:ga93c5741bca44b43e5b849cacbd616098" id="r_ga93c5741bca44b43e5b849cacbd616098"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga93c5741bca44b43e5b849cacbd616098">vmaCalculateVirtualBlockStatistics</a> (<a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> virtualBlock, <a class="el" href="struct_vma_detailed_statistics.html">VmaDetailedStatistics</a> *pStats)</td></tr>
<tr class="memdesc:ga93c5741bca44b43e5b849cacbd616098"><td class="mdescLeft">&#160;</td><td class="mdescRight">Calculates and returns detailed statistics about virtual allocations and memory usage in given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>API elements related to the mechanism of <a class="el" href="virtual_allocator.html">Virtual allocator</a> - using the core allocation algorithm for user-defined purpose without allocating any real GPU memory. </p>
<h2 class="groupheader">Typedef Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga936815e64946a6b6d812d08d10184c23">&#9670;&#160;</a></span>VmaVirtualAllocationCreateFlagBits</h2>
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<td class="memname">typedef enum <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6">VmaVirtualAllocationCreateFlagBits</a> <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6">VmaVirtualAllocationCreateFlagBits</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gae96ffc099bf898257fb19e9410ed08a7">&#9670;&#160;</a></span>VmaVirtualAllocationCreateFlags</h2>
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<td class="memname">typedef VkFlags <a class="el" href="#gae96ffc099bf898257fb19e9410ed08a7">VmaVirtualAllocationCreateFlags</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. See <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6" title="Flags to be passed as VmaVirtualAllocationCreateInfo::flags.">VmaVirtualAllocationCreateFlagBits</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gac3c90d80bedc6847a41b82d0e2158c9e">&#9670;&#160;</a></span>VmaVirtualAllocationCreateInfo</h2>
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<td class="memname">typedef struct VmaVirtualAllocationCreateInfo VmaVirtualAllocationCreateInfo</td>
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<p>Parameters of created virtual allocation to be passed to <a class="el" href="#ga6b7cdcc1c3e5103c323fedc4e1319e01" title="Allocates new virtual allocation inside given VmaVirtualBlock.">vmaVirtualAllocate()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga75bc33ff7cf18c98e101f570dc2a5ebc">&#9670;&#160;</a></span>VmaVirtualAllocationInfo</h2>
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<td class="memname">typedef struct VmaVirtualAllocationInfo VmaVirtualAllocationInfo</td>
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<p>Parameters of an existing virtual allocation, returned by <a class="el" href="#ga8ee14ceb1fe033ec84d8aa29e1f75afa" title="Returns information about a specific virtual allocation within a virtual block, like its size and pUs...">vmaGetVirtualAllocationInfo()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga0860ba1c0a67178fae4aecb63a78573e">&#9670;&#160;</a></span>VmaVirtualBlockCreateFlagBits</h2>
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<td class="memname">typedef enum <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a> <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga4e49c2f0ab7f6b4868833e5bac78d91e">&#9670;&#160;</a></span>VmaVirtualBlockCreateFlags</h2>
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<td class="memname">typedef VkFlags <a class="el" href="#ga4e49c2f0ab7f6b4868833e5bac78d91e">VmaVirtualBlockCreateFlags</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. See <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca" title="Flags to be passed as VmaVirtualBlockCreateInfo::flags.">VmaVirtualBlockCreateFlagBits</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga4753d42d40217a3a652a3cdf253ad773">&#9670;&#160;</a></span>VmaVirtualBlockCreateInfo</h2>
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<td class="memname">typedef struct VmaVirtualBlockCreateInfo VmaVirtualBlockCreateInfo</td>
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<p>Parameters of created <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object to be passed to <a class="el" href="#gab585754076877265fdae33e5c40ef13b" title="Creates new VmaVirtualBlock object.">vmaCreateVirtualBlock()</a>. </p>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2e9c64d405b14156fea7e10c4ad06cb6">&#9670;&#160;</a></span>VmaVirtualAllocationCreateFlagBits</h2>
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<td class="memname">enum <a class="el" href="#ga2e9c64d405b14156fea7e10c4ad06cb6">VmaVirtualAllocationCreateFlagBits</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_allocation_create_info.html#ab10e16956cc4bf20ced9de77d1129ea4" title="Use combination of VmaVirtualAllocationCreateFlagBits.">VmaVirtualAllocationCreateInfo::flags</a>. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6a9524a329a55b5ec390d57d90b67ad78e" name="gga2e9c64d405b14156fea7e10c4ad06cb6a9524a329a55b5ec390d57d90b67ad78e"></a>VMA_VIRTUAL_ALLOCATION_CREATE_UPPER_ADDRESS_BIT&#160;</td><td class="fielddoc"><p>Allocation will be created from upper stack in a double stack pool. </p>
<p>This flag is only allowed for virtual blocks created with <a class="el" href="#gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96" title="Enables alternative, linear allocation algorithm in this virtual block.">VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT</a> flag. </p>
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<tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6ae2a9591a62b5e3b1bdcbc81c6188a1bf" name="gga2e9c64d405b14156fea7e10c4ad06cb6ae2a9591a62b5e3b1bdcbc81c6188a1bf"></a>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT&#160;</td><td class="fielddoc"><p>Allocation strategy that tries to minimize memory usage. </p>
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<tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6a562d10a46012719d33167d3dc5dbbf9b" name="gga2e9c64d405b14156fea7e10c4ad06cb6a562d10a46012719d33167d3dc5dbbf9b"></a>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT&#160;</td><td class="fielddoc"><p>Allocation strategy that tries to minimize allocation time. </p>
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<tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6a3bb82d2aedd587a64846a1d7778852e6" name="gga2e9c64d405b14156fea7e10c4ad06cb6a3bb82d2aedd587a64846a1d7778852e6"></a>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_OFFSET_BIT&#160;</td><td class="fielddoc"><p>Allocation strategy that chooses always the lowest offset in available space. This is not the most efficient strategy but achieves highly packed data. </p>
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<tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6ac5b5e45c335368d18df59c9f27df17e3" name="gga2e9c64d405b14156fea7e10c4ad06cb6ac5b5e45c335368d18df59c9f27df17e3"></a>VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MASK&#160;</td><td class="fielddoc"><p>A bit mask to extract only <code>STRATEGY</code> bits from entire set of flags. </p>
<p>These strategy flags are binary compatible with equivalent flags in <a class="el" href="group__group__alloc.html#gad9889c10c798b040d59c92f257cae597" title="Flags to be passed as VmaAllocationCreateInfo::flags.">VmaAllocationCreateFlagBits</a>. </p>
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<tr><td class="fieldname"><a id="gga2e9c64d405b14156fea7e10c4ad06cb6ac1163c03ea837fa663462dc286d6a1a9" name="gga2e9c64d405b14156fea7e10c4ad06cb6ac1163c03ea837fa663462dc286d6a1a9"></a>VMA_VIRTUAL_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM&#160;</td><td class="fielddoc"></td></tr>
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<h2 class="memtitle"><span class="permalink"><a href="#ga88bcf8c1cd3bb1610ff7343811c65bca">&#9670;&#160;</a></span>VmaVirtualBlockCreateFlagBits</h2>
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<td class="memname">enum <a class="el" href="#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a></td>
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<p>Flags to be passed as <a class="el" href="struct_vma_virtual_block_create_info.html#aaab9bf7e2d228c02ab6d90a72a6e6912" title="Use combination of VmaVirtualBlockCreateFlagBits.">VmaVirtualBlockCreateInfo::flags</a>. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96" name="gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96"></a>VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT&#160;</td><td class="fielddoc"><p>Enables alternative, linear allocation algorithm in this virtual block. </p>
<p>Specify this flag to enable linear allocation algorithm, which always creates new allocations after last one and doesn't reuse space from allocations freed in between. It trades memory consumption for simplified algorithm and data structure, which has better performance and uses less memory for metadata.</p>
<p>By using this flag, you can achieve behavior of free-at-once, stack, ring buffer, and double stack. For details, see documentation chapter <a class="el" href="custom_memory_pools.html#linear_algorithm">Linear allocation algorithm</a>. </p>
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<tr><td class="fieldname"><a id="gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844" name="gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844"></a>VMA_VIRTUAL_BLOCK_CREATE_ALGORITHM_MASK&#160;</td><td class="fielddoc"><p>Bit mask to extract only <code>ALGORITHM</code> bits from entire set of flags. </p>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga93c5741bca44b43e5b849cacbd616098">&#9670;&#160;</a></span>vmaCalculateVirtualBlockStatistics()</h2>
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<td class="memname">void vmaCalculateVirtualBlockStatistics </td>
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<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
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<p>Calculates and returns detailed statistics about virtual allocations and memory usage in given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<p>This function is slow to call. Use for debugging purposes. For less detailed statistics, see <a class="el" href="#ga2902aa3130866afcc64bb5f984113db3" title="Calculates and returns statistics about virtual allocations and memory usage in given VmaVirtualBlock...">vmaGetVirtualBlockStatistics()</a>. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga5eda6f55919fb05bd2f56a112590c571">&#9670;&#160;</a></span>vmaClearVirtualBlock()</h2>
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<td class="memname">void vmaClearVirtualBlock </td>
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<p>Frees all virtual allocations inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<p>You must either call this function or free each virtual allocation individually with <a class="el" href="#ga09fc688c0c3653ff23723b037e5d5033" title="Frees virtual allocation inside given VmaVirtualBlock.">vmaVirtualFree()</a> before destroying a virtual block. Otherwise, an assert is called.</p>
<p>If you keep pointer to some additional metadata associated with your virtual allocation in its <code>pUserData</code>, don't forget to free it as well. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#gab585754076877265fdae33e5c40ef13b">&#9670;&#160;</a></span>vmaCreateVirtualBlock()</h2>
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<td class="memname">VkResult vmaCreateVirtualBlock </td>
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<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> *</td> <td class="paramname"><span class="paramname"><em>pVirtualBlock</em></span>&#160;)</td>
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<p>Creates new <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramdir"></td><td class="paramname">pCreateInfo</td><td>Parameters for creation. </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pVirtualBlock</td><td>Returned virtual block object or <code>VMA_NULL</code> if creation failed. </td></tr>
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</dd>
</dl>
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<a id="ga3795f7783ae2c182cede067d656f66a5" name="ga3795f7783ae2c182cede067d656f66a5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga3795f7783ae2c182cede067d656f66a5">&#9670;&#160;</a></span>vmaDestroyVirtualBlock()</h2>
<div class="memitem">
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<td class="memname">void vmaDestroyVirtualBlock </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em></span></td><td>)</td>
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<p>Destroys <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> object. </p>
<p>Please note that you should consciously handle virtual allocations that could remain unfreed in the block. You should either free them individually using <a class="el" href="#ga09fc688c0c3653ff23723b037e5d5033" title="Frees virtual allocation inside given VmaVirtualBlock.">vmaVirtualFree()</a> or call <a class="el" href="#ga5eda6f55919fb05bd2f56a112590c571" title="Frees all virtual allocations inside given VmaVirtualBlock.">vmaClearVirtualBlock()</a> if you are sure this is what you want. If you do neither, an assert is called.</p>
<p>If you keep pointers to some additional metadata associated with your virtual allocations in their <code>pUserData</code>, don't forget to free them. </p>
</div>
</div>
<a id="ga8ee14ceb1fe033ec84d8aa29e1f75afa" name="ga8ee14ceb1fe033ec84d8aa29e1f75afa"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga8ee14ceb1fe033ec84d8aa29e1f75afa">&#9670;&#160;</a></span>vmaGetVirtualAllocationInfo()</h2>
<div class="memitem">
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<td class="memname">void vmaGetVirtualAllocationInfo </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_allocation_info.html">VmaVirtualAllocationInfo</a> *</td> <td class="paramname"><span class="paramname"><em>pVirtualAllocInfo</em></span>&#160;)</td>
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<p>Returns information about a specific virtual allocation within a virtual block, like its size and <code>pUserData</code> pointer. </p>
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<a id="ga2902aa3130866afcc64bb5f984113db3" name="ga2902aa3130866afcc64bb5f984113db3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga2902aa3130866afcc64bb5f984113db3">&#9670;&#160;</a></span>vmaGetVirtualBlockStatistics()</h2>
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<td class="memname">void vmaGetVirtualBlockStatistics </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_statistics.html">VmaStatistics</a> *</td> <td class="paramname"><span class="paramname"><em>pStats</em></span>&#160;)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Calculates and returns statistics about virtual allocations and memory usage in given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<p>This function is fast to call. For more detailed statistics, see <a class="el" href="#ga93c5741bca44b43e5b849cacbd616098" title="Calculates and returns detailed statistics about virtual allocations and memory usage in given VmaVir...">vmaCalculateVirtualBlockStatistics()</a>. </p>
</div>
</div>
<a id="gacd53b5b1d23f8fcbad692ccfdc1811f1" name="gacd53b5b1d23f8fcbad692ccfdc1811f1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gacd53b5b1d23f8fcbad692ccfdc1811f1">&#9670;&#160;</a></span>vmaIsVirtualBlockEmpty()</h2>
<div class="memitem">
<div class="memproto">
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<tr>
<td class="memname">VkBool32 vmaIsVirtualBlockEmpty </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em></span></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Returns true of the <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a> is empty - contains 0 virtual allocations and has all its space available for new allocations. </p>
</div>
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<a id="ga001ea1850458a4062b829e09c303fca2" name="ga001ea1850458a4062b829e09c303fca2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga001ea1850458a4062b829e09c303fca2">&#9670;&#160;</a></span>vmaSetVirtualAllocationUserData()</h2>
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<td class="memname">void vmaSetVirtualAllocationUserData </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void *</td> <td class="paramname"><span class="paramname"><em>pUserData</em></span>&#160;)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Changes custom pointer associated with given virtual allocation. </p>
</div>
</div>
<a id="ga6b7cdcc1c3e5103c323fedc4e1319e01" name="ga6b7cdcc1c3e5103c323fedc4e1319e01"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga6b7cdcc1c3e5103c323fedc4e1319e01">&#9670;&#160;</a></span>vmaVirtualAllocate()</h2>
<div class="memitem">
<div class="memproto">
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<td class="memname">VkResult vmaVirtualAllocate </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="struct_vma_virtual_allocation_create_info.html">VmaVirtualAllocationCreateInfo</a> *</td> <td class="paramname"><span class="paramname"><em>pCreateInfo</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> *</td> <td class="paramname"><span class="paramname"><em>pAllocation</em>, </span></td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">VkDeviceSize *</td> <td class="paramname"><span class="paramname"><em>pOffset</em></span>&#160;)</td>
</tr>
</table>
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<p>Allocates new virtual allocation inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<p>If the allocation fails due to not enough free space available, <code>VK_ERROR_OUT_OF_DEVICE_MEMORY</code> is returned (despite the function doesn't ever allocate actual GPU memory). <code>pAllocation</code> is then set to <code>VK_NULL_HANDLE</code> and <code>pOffset</code>, if not null, it set to <code>UINT64_MAX</code>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">virtualBlock</td><td>Virtual block </td></tr>
<tr><td class="paramdir"></td><td class="paramname">pCreateInfo</td><td>Parameters for the allocation </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pAllocation</td><td>Returned handle of the new allocation </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">pOffset</td><td>Returned offset of the new allocation. Optional, can be null. </td></tr>
</table>
</dd>
</dl>
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<a id="ga09fc688c0c3653ff23723b037e5d5033" name="ga09fc688c0c3653ff23723b037e5d5033"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga09fc688c0c3653ff23723b037e5d5033">&#9670;&#160;</a></span>vmaVirtualFree()</h2>
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<td class="memname">void vmaVirtualFree </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_block.html">VmaVirtualBlock</a></td> <td class="paramname"><span class="paramname"><em>virtualBlock</em>, </span></td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></td> <td class="paramname"><span class="paramname"><em>allocation</em></span>&#160;)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Frees virtual allocation inside given <a class="el" href="struct_vma_virtual_block.html" title="Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...">VmaVirtualBlock</a>. </p>
<p>It is correct to call this function with <code>allocation == VK_NULL_HANDLE</code> - it does nothing. </p>
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<div class="headertitle"><div class="title">Vulkan Memory Allocator </div></div>
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<div class="textblock"><p><b>Version 3.1.0</b></p>
<p>Copyright (c) 2017-2024 Advanced Micro Devices, Inc. All rights reserved. <br />
License: MIT <br />
See also: <a href="https://gpuopen.com/gaming-product/vulkan-memory-allocator/">product page on GPUOpen</a>, <a href="https://github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator">repository on GitHub</a></p>
<p><b>API documentation divided into groups:</b> <a href="topics.html">Topics</a></p>
<p><b>General documentation chapters:</b></p>
<ul>
<li><b>User guide</b><ul>
<li><a class="el" href="quick_start.html">Quick start</a><ul>
<li><a class="el" href="quick_start.html#quick_start_project_setup">Project setup</a></li>
<li><a class="el" href="quick_start.html#quick_start_initialization">Initialization</a></li>
<li><a class="el" href="quick_start.html#quick_start_resource_allocation">Resource allocation</a></li>
</ul>
</li>
<li><a class="el" href="choosing_memory_type.html">Choosing memory type</a><ul>
<li><a class="el" href="choosing_memory_type.html#choosing_memory_type_usage">Usage</a></li>
<li><a class="el" href="choosing_memory_type.html#choosing_memory_type_required_preferred_flags">Required and preferred flags</a></li>
<li><a class="el" href="choosing_memory_type.html#choosing_memory_type_explicit_memory_types">Explicit memory types</a></li>
<li><a class="el" href="choosing_memory_type.html#choosing_memory_type_custom_memory_pools">Custom memory pools</a></li>
<li><a class="el" href="choosing_memory_type.html#choosing_memory_type_dedicated_allocations">Dedicated allocations</a></li>
</ul>
</li>
<li><a class="el" href="memory_mapping.html">Memory mapping</a><ul>
<li><a class="el" href="memory_mapping.html#memory_mapping_copy_functions">Copy functions</a></li>
<li><a class="el" href="memory_mapping.html#memory_mapping_mapping_functions">Mapping functions</a></li>
<li><a class="el" href="memory_mapping.html#memory_mapping_persistently_mapped_memory">Persistently mapped memory</a></li>
<li><a class="el" href="memory_mapping.html#memory_mapping_cache_control">Cache flush and invalidate</a></li>
</ul>
</li>
<li><a class="el" href="staying_within_budget.html">Staying within budget</a><ul>
<li><a class="el" href="staying_within_budget.html#staying_within_budget_querying_for_budget">Querying for budget</a></li>
<li><a class="el" href="staying_within_budget.html#staying_within_budget_controlling_memory_usage">Controlling memory usage</a></li>
</ul>
</li>
<li><a class="el" href="resource_aliasing.html">Resource aliasing (overlap)</a></li>
<li><a class="el" href="custom_memory_pools.html">Custom memory pools</a><ul>
<li><a class="el" href="custom_memory_pools.html#custom_memory_pools_MemTypeIndex">Choosing memory type index</a></li>
<li><a class="el" href="custom_memory_pools.html#custom_memory_pools_when_not_use">When not to use custom pools</a></li>
<li><a class="el" href="custom_memory_pools.html#linear_algorithm">Linear allocation algorithm</a><ul>
<li><a class="el" href="custom_memory_pools.html#linear_algorithm_free_at_once">Free-at-once</a></li>
<li><a class="el" href="custom_memory_pools.html#linear_algorithm_stack">Stack</a></li>
<li><a class="el" href="custom_memory_pools.html#linear_algorithm_double_stack">Double stack</a></li>
<li><a class="el" href="custom_memory_pools.html#linear_algorithm_ring_buffer">Ring buffer</a></li>
</ul>
</li>
</ul>
</li>
<li><a class="el" href="defragmentation.html">Defragmentation</a></li>
<li><a class="el" href="statistics.html">Statistics</a><ul>
<li><a class="el" href="statistics.html#statistics_numeric_statistics">Numeric statistics</a></li>
<li><a class="el" href="statistics.html#statistics_json_dump">JSON dump</a></li>
</ul>
</li>
<li><a class="el" href="allocation_annotation.html">Allocation names and user data</a><ul>
<li><a class="el" href="allocation_annotation.html#allocation_user_data">Allocation user data</a></li>
<li><a class="el" href="allocation_annotation.html#allocation_names">Allocation names</a></li>
</ul>
</li>
<li><a class="el" href="virtual_allocator.html">Virtual allocator</a></li>
<li><a class="el" href="debugging_memory_usage.html">Debugging incorrect memory usage</a><ul>
<li><a class="el" href="debugging_memory_usage.html#debugging_memory_usage_initialization">Memory initialization</a></li>
<li><a class="el" href="debugging_memory_usage.html#debugging_memory_usage_margins">Margins</a></li>
<li><a class="el" href="debugging_memory_usage.html#debugging_memory_usage_corruption_detection">Corruption detection</a></li>
<li><a class="el" href="debugging_memory_usage.html#debugging_memory_usage_leak_detection">Leak detection features</a></li>
</ul>
</li>
<li><a class="el" href="other_api_interop.html">Interop with other graphics APIs</a></li>
</ul>
</li>
<li><a class="el" href="usage_patterns.html">Recommended usage patterns</a><ul>
<li><a class="el" href="usage_patterns.html#usage_patterns_gpu_only">GPU-only resource</a></li>
<li><a class="el" href="usage_patterns.html#usage_patterns_staging_copy_upload">Staging copy for upload</a></li>
<li><a class="el" href="usage_patterns.html#usage_patterns_readback">Readback</a></li>
<li><a class="el" href="usage_patterns.html#usage_patterns_advanced_data_uploading">Advanced data uploading</a></li>
<li><a class="el" href="usage_patterns.html#usage_patterns_other_use_cases">Other use cases</a></li>
</ul>
</li>
<li><a class="el" href="configuration.html">Configuration</a><ul>
<li><a class="el" href="configuration.html#config_Vulkan_functions">Pointers to Vulkan functions</a></li>
<li><a class="el" href="configuration.html#custom_memory_allocator">Custom host memory allocator</a></li>
<li><a class="el" href="configuration.html#allocation_callbacks">Device memory allocation callbacks</a></li>
<li><a class="el" href="configuration.html#heap_memory_limit">Device heap memory limit</a></li>
</ul>
</li>
<li><b>Extension support</b><ul>
<li><a class="el" href="vk_khr_dedicated_allocation.html">VK_KHR_dedicated_allocation</a></li>
<li><a class="el" href="enabling_buffer_device_address.html">Enabling buffer device address</a></li>
<li><a class="el" href="vk_ext_memory_priority.html">VK_EXT_memory_priority</a></li>
<li><a class="el" href="vk_amd_device_coherent_memory.html">VK_AMD_device_coherent_memory</a></li>
</ul>
</li>
<li><a class="el" href="general_considerations.html">General considerations</a><ul>
<li><a class="el" href="general_considerations.html#general_considerations_thread_safety">Thread safety</a></li>
<li><a class="el" href="general_considerations.html#general_considerations_versioning_and_compatibility">Versioning and compatibility</a></li>
<li><a class="el" href="general_considerations.html#general_considerations_validation_layer_warnings">Validation layer warnings</a></li>
<li><a class="el" href="general_considerations.html#general_considerations_allocation_algorithm">Allocation algorithm</a></li>
<li><a class="el" href="general_considerations.html#general_considerations_features_not_supported">Features not supported</a> </li>
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</li>
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<li class="navelem"><a class="el" href="index.html">Vulkan Memory Allocator</a></li> </ul>
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<div class="headertitle"><div class="title">Memory mapping</div></div>
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<div class="contents">
<div class="textblock"><p>To "map memory" in Vulkan means to obtain a CPU pointer to <code>VkDeviceMemory</code>, to be able to read from it or write to it in CPU code. Mapping is possible only of memory allocated from a memory type that has <code>VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT</code> flag. Functions <code>vkMapMemory()</code>, <code>vkUnmapMemory()</code> are designed for this purpose. You can use them directly with memory allocated by this library, but it is not recommended because of following issue: Mapping the same <code>VkDeviceMemory</code> block multiple times is illegal - only one mapping at a time is allowed. This includes mapping disjoint regions. Mapping is not reference-counted internally by Vulkan. It is also not thread-safe. Because of this, Vulkan Memory Allocator provides following facilities:</p>
<dl class="section note"><dt>Note</dt><dd>If you want to be able to map an allocation, you need to specify one of the flags <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a> or <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a> in <a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b" title="Use VmaAllocationCreateFlagBits enum.">VmaAllocationCreateInfo::flags</a>. These flags are required for an allocation to be mappable when using <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a> or other <code>VMA_MEMORY_USAGE_AUTO*</code> enum values. For other usage values they are ignored and every such allocation made in <code>HOST_VISIBLE</code> memory type is mappable, but these flags can still be used for consistency.</dd></dl>
<h1><a class="anchor" id="memory_mapping_copy_functions"></a>
Copy functions</h1>
<p>The easiest way to copy data from a host pointer to an allocation is to use convenience function <a class="el" href="group__group__alloc.html#ga11731ec58a3a43a22bb925e0780ef405" title="Maps the allocation temporarily if needed, copies data from specified host pointer to it,...">vmaCopyMemoryToAllocation()</a>. It automatically maps the Vulkan memory temporarily (if not already mapped), performs <code>memcpy</code>, and calls <code>vkFlushMappedMemoryRanges</code> (if required - if memory type is not <code>HOST_COHERENT</code>).</p>
<p>It is also the safest one, because using <code>memcpy</code> avoids a risk of accidentally introducing memory reads (e.g. by doing <code>pMappedVectors[i] += v</code>), which may be very slow on memory types that are not <code>HOST_CACHED</code>.</p>
<div class="fragment"><div class="line"><span class="keyword">struct </span>ConstantBuffer</div>
<div class="line">{</div>
<div class="line"> ...</div>
<div class="line">};</div>
<div class="line">ConstantBuffer constantBufferData = ...</div>
<div class="line"> </div>
<div class="line">VkBufferCreateInfo bufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">bufCreateInfo.size = <span class="keyword">sizeof</span>(ConstantBuffer);</div>
<div class="line">bufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">flags</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer buf;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> alloc;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufCreateInfo, &amp;allocCreateInfo, &amp;buf, &amp;alloc, <span class="keyword">nullptr</span>);</div>
<div class="line"> </div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga11731ec58a3a43a22bb925e0780ef405">vmaCopyMemoryToAllocation</a>(allocator, &amp;constantBufferData, alloc, 0, <span class="keyword">sizeof</span>(ConstantBuffer));</div>
<div class="ttc" id="agroup__group__alloc_html_ga11731ec58a3a43a22bb925e0780ef405"><div class="ttname"><a href="group__group__alloc.html#ga11731ec58a3a43a22bb925e0780ef405">vmaCopyMemoryToAllocation</a></div><div class="ttdeci">VkResult vmaCopyMemoryToAllocation(VmaAllocator allocator, const void *pSrcHostPointer, VmaAllocation dstAllocation, VkDeviceSize dstAllocationLocalOffset, VkDeviceSize size)</div><div class="ttdoc">Maps the allocation temporarily if needed, copies data from specified host pointer to it,...</div></div>
<div class="ttc" id="agroup__group__alloc_html_gac72ee55598617e8eecca384e746bab51"><div class="ttname"><a href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a></div><div class="ttdeci">VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Creates a new VkBuffer, allocates and binds memory for it.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e"><div class="ttname"><a href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a></div><div class="ttdeci">@ VMA_MEMORY_USAGE_AUTO</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:527</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:636</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_accb8b06b1f677d858cb9af20705fa910"><div class="ttname"><a href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo::usage</a></div><div class="ttdeci">VmaMemoryUsage usage</div><div class="ttdoc">Intended usage of memory.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1271</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_add09658ac14fe290ace25470ddd6d41b"><div class="ttname"><a href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">VmaAllocationCreateInfo::flags</a></div><div class="ttdeci">VmaAllocationCreateFlags flags</div><div class="ttdoc">Use VmaAllocationCreateFlagBits enum.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1265</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
</div><!-- fragment --><p>Copy in the other direction - from an allocation to a host pointer can be performed the same way using function <a class="el" href="group__group__alloc.html#gaac883dd38863944335071213b9ae8477" title="Invalidates memory in the host caches if needed, maps the allocation temporarily if needed,...">vmaCopyAllocationToMemory()</a>.</p>
<h1><a class="anchor" id="memory_mapping_mapping_functions"></a>
Mapping functions</h1>
<p>The library provides following functions for mapping of a specific allocation: <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a>, <a class="el" href="group__group__alloc.html#ga9bc268595cb33f6ec4d519cfce81ff45" title="Unmaps memory represented by given allocation, mapped previously using vmaMapMemory().">vmaUnmapMemory()</a>. They are safer and more convenient to use than standard Vulkan functions. You can map an allocation multiple times simultaneously - mapping is reference-counted internally. You can also map different allocations simultaneously regardless of whether they use the same <code>VkDeviceMemory</code> block. The way it is implemented is that the library always maps entire memory block, not just region of the allocation. For further details, see description of <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> function. Example:</p>
<div class="fragment"><div class="line"><span class="comment">// Having these objects initialized:</span></div>
<div class="line"><span class="keyword">struct </span>ConstantBuffer</div>
<div class="line">{</div>
<div class="line"> ...</div>
<div class="line">};</div>
<div class="line">ConstantBuffer constantBufferData = ...</div>
<div class="line"> </div>
<div class="line">VmaAllocator allocator = ...</div>
<div class="line">VkBuffer constantBuffer = ...</div>
<div class="line">VmaAllocation constantBufferAllocation = ...</div>
<div class="line"> </div>
<div class="line"><span class="comment">// You can map and fill your buffer using following code:</span></div>
<div class="line"> </div>
<div class="line">void* mappedData;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069">vmaMapMemory</a>(allocator, constantBufferAllocation, &amp;mappedData);</div>
<div class="line">memcpy(mappedData, &amp;constantBufferData, <span class="keyword">sizeof</span>(constantBufferData));</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga9bc268595cb33f6ec4d519cfce81ff45">vmaUnmapMemory</a>(allocator, constantBufferAllocation);</div>
<div class="ttc" id="agroup__group__alloc_html_ga9bc268595cb33f6ec4d519cfce81ff45"><div class="ttname"><a href="group__group__alloc.html#ga9bc268595cb33f6ec4d519cfce81ff45">vmaUnmapMemory</a></div><div class="ttdeci">void vmaUnmapMemory(VmaAllocator allocator, VmaAllocation allocation)</div><div class="ttdoc">Unmaps memory represented by given allocation, mapped previously using vmaMapMemory().</div></div>
<div class="ttc" id="agroup__group__alloc_html_gad5bd1243512d099706de88168992f069"><div class="ttname"><a href="group__group__alloc.html#gad5bd1243512d099706de88168992f069">vmaMapMemory</a></div><div class="ttdeci">VkResult vmaMapMemory(VmaAllocator allocator, VmaAllocation allocation, void **ppData)</div><div class="ttdoc">Maps memory represented by given allocation and returns pointer to it.</div></div>
</div><!-- fragment --><p>When mapping, you may see a warning from Vulkan validation layer similar to this one:</p>
<p><em>Mapping an image with layout VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL can result in undefined behavior if this memory is used by the device. Only GENERAL or PREINITIALIZED should be used.</em></p>
<p>It happens because the library maps entire <code>VkDeviceMemory</code> block, where different types of images and buffers may end up together, especially on GPUs with unified memory like Intel. You can safely ignore it if you are sure you access only memory of the intended object that you wanted to map.</p>
<h1><a class="anchor" id="memory_mapping_persistently_mapped_memory"></a>
Persistently mapped memory</h1>
<p>Keeping your memory persistently mapped is generally OK in Vulkan. You don't need to unmap it before using its data on the GPU. The library provides a special feature designed for that: Allocations made with <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f" title="Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.">VMA_ALLOCATION_CREATE_MAPPED_BIT</a> flag set in <a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b" title="Use VmaAllocationCreateFlagBits enum.">VmaAllocationCreateInfo::flags</a> stay mapped all the time, so you can just access CPU pointer to it any time without a need to call any "map" or "unmap" function. Example:</p>
<div class="fragment"><div class="line">VkBufferCreateInfo bufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">bufCreateInfo.size = <span class="keyword">sizeof</span>(ConstantBuffer);</div>
<div class="line">bufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b">flags</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a> |</div>
<div class="line"> <a class="code hl_enumvalue" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f">VMA_ALLOCATION_CREATE_MAPPED_BIT</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer buf;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> alloc;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_info.html">VmaAllocationInfo</a> allocInfo;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufCreateInfo, &amp;allocCreateInfo, &amp;buf, &amp;alloc, &amp;allocInfo);</div>
<div class="line"> </div>
<div class="line"><span class="comment">// Buffer is already mapped. You can access its memory.</span></div>
<div class="line">memcpy(allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>, &amp;constantBufferData, <span class="keyword">sizeof</span>(constantBufferData));</div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f">VMA_ALLOCATION_CREATE_MAPPED_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_MAPPED_BIT</div><div class="ttdoc">Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:587</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html"><div class="ttname"><a href="struct_vma_allocation_info.html">VmaAllocationInfo</a></div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1382</div></div>
<div class="ttc" id="astruct_vma_allocation_info_html_a5eeffbe2d2f30f53370ff14aefbadbe2"><div class="ttname"><a href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">VmaAllocationInfo::pMappedData</a></div><div class="ttdeci">void * pMappedData</div><div class="ttdoc">Pointer to the beginning of this allocation as mapped data.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1424</div></div>
</div><!-- fragment --><dl class="section note"><dt>Note</dt><dd><a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f" title="Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.">VMA_ALLOCATION_CREATE_MAPPED_BIT</a> by itself doesn't guarantee that the allocation will end up in a mappable memory type. For this, you need to also specify <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a> or <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a>. <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11da372cc3a82931c5e5d6146cd9dd1f" title="Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.">VMA_ALLOCATION_CREATE_MAPPED_BIT</a> only guarantees that if the memory is <code>HOST_VISIBLE</code>, the allocation will be mapped on creation. For an example of how to make use of this fact, see section <a class="el" href="usage_patterns.html#usage_patterns_advanced_data_uploading">Advanced data uploading</a>.</dd></dl>
<h1><a class="anchor" id="memory_mapping_cache_control"></a>
Cache flush and invalidate</h1>
<p>Memory in Vulkan doesn't need to be unmapped before using it on GPU, but unless a memory types has <code>VK_MEMORY_PROPERTY_HOST_COHERENT_BIT</code> flag set, you need to manually <b>invalidate</b> cache before reading of mapped pointer and <b>flush</b> cache after writing to mapped pointer. Map/unmap operations don't do that automatically. Vulkan provides following functions for this purpose <code>vkFlushMappedMemoryRanges()</code>, <code>vkInvalidateMappedMemoryRanges()</code>, but this library provides more convenient functions that refer to given allocation object: <a class="el" href="group__group__alloc.html#ga30c37c1eec6025f397be41644f48490f" title="Flushes memory of given allocation.">vmaFlushAllocation()</a>, <a class="el" href="group__group__alloc.html#gaaa8412919139ef413a4215ac6a290fae" title="Invalidates memory of given allocation.">vmaInvalidateAllocation()</a>, or multiple objects at once: <a class="el" href="group__group__alloc.html#gac3dd00da721875ed99fa8a881922bdfc" title="Flushes memory of given set of allocations.">vmaFlushAllocations()</a>, <a class="el" href="group__group__alloc.html#gab25b558d75f7378ec944a1522fdcc3c5" title="Invalidates memory of given set of allocations.">vmaInvalidateAllocations()</a>.</p>
<p>Regions of memory specified for flush/invalidate must be aligned to <code>VkPhysicalDeviceLimits::nonCoherentAtomSize</code>. This is automatically ensured by the library. In any memory type that is <code>HOST_VISIBLE</code> but not <code>HOST_COHERENT</code>, all allocations within blocks are aligned to this value, so their offsets are always multiply of <code>nonCoherentAtomSize</code> and two different allocations never share same "line" of this size.</p>
<p>Also, Windows drivers from all 3 PC GPU vendors (AMD, Intel, NVIDIA) currently provide <code>HOST_COHERENT</code> flag on all memory types that are <code>HOST_VISIBLE</code>, so on PC you may not need to bother. </p>
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/*
@licstart The following is the entire license notice for the JavaScript code in this file.
The MIT License (MIT)
Copyright (C) 1997-2020 by Dimitri van Heesch
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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function initMenu(relPath,searchEnabled,serverSide,searchPage,search) {
function makeTree(data,relPath) {
let result='';
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let url;
const link = data.children[i].url;
if (link.substring(0,1)=='^') {
url = link.substring(1);
} else {
url = relPath+link;
}
result+='<li><a href="'+url+'">'+
data.children[i].text+'</a>'+
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<div class="textblock"><p>VMA provides some features that help with interoperability with other graphics APIs, e.g. OpenGL.</p>
<h1><a class="anchor" id="opengl_interop_exporting_memory"></a>
Exporting memory</h1>
<p>If you want to attach <code>VkExportMemoryAllocateInfoKHR</code> or other structure to <code>pNext</code> chain of memory allocations made by the library:</p>
<p>You can create <a class="el" href="custom_memory_pools.html">Custom memory pools</a> for such allocations. Define and fill in your <code>VkExportMemoryAllocateInfoKHR</code> structure and attach it to <a class="el" href="struct_vma_pool_create_info.html#ab6f2e52c47bfe1f4b44920b8bfc27b41" title="Additional pNext chain to be attached to VkMemoryAllocateInfo used for every allocation made by this ...">VmaPoolCreateInfo::pMemoryAllocateNext</a> while creating the custom pool. Please note that the structure must remain alive and unchanged for the whole lifetime of the <a class="el" href="struct_vma_pool.html" title="Represents custom memory pool.">VmaPool</a>, not only while creating it, as no copy of the structure is made, but its original pointer is used for each allocation instead.</p>
<p>If you want to export all memory allocated by VMA from certain memory types, also dedicated allocations or other allocations made from default pools, an alternative solution is to fill in <a class="el" href="struct_vma_allocator_create_info.html#ae8f0db05e5cb4c43d7713bf4a49a736b" title="Either null or a pointer to an array of external memory handle types for each Vulkan memory type.">VmaAllocatorCreateInfo::pTypeExternalMemoryHandleTypes</a>. It should point to an array with <code>VkExternalMemoryHandleTypeFlagsKHR</code> to be automatically passed by the library through <code>VkExportMemoryAllocateInfoKHR</code> on each allocation made from a specific memory type. Please note that new versions of the library also support dedicated allocations created in custom pools.</p>
<p>You should not mix these two methods in a way that allows to apply both to the same memory type. Otherwise, <code>VkExportMemoryAllocateInfoKHR</code> structure would be attached twice to the <code>pNext</code> chain of <code>VkMemoryAllocateInfo</code>.</p>
<h1><a class="anchor" id="opengl_interop_custom_alignment"></a>
Custom alignment</h1>
<p>Buffers or images exported to a different API like OpenGL may require a different alignment, higher than the one used by the library automatically, queried from functions like <code>vkGetBufferMemoryRequirements</code>. To impose such alignment:</p>
<p>You can create <a class="el" href="custom_memory_pools.html">Custom memory pools</a> for such allocations. Set <a class="el" href="struct_vma_pool_create_info.html#ade3eca546f0c6ab4e8fbf20eb6d854cb" title="Additional minimum alignment to be used for all allocations created from this pool....">VmaPoolCreateInfo::minAllocationAlignment</a> member to the minimum alignment required for each allocation to be made out of this pool. The alignment actually used will be the maximum of this member and the alignment returned for the specific buffer or image from a function like <code>vkGetBufferMemoryRequirements</code>, which is called by VMA automatically.</p>
<p>If you want to create a buffer with a specific minimum alignment out of default pools, use special function <a class="el" href="group__group__alloc.html#gaa06a690013a0d01e60894ac378083834" title="Creates a buffer with additional minimum alignment.">vmaCreateBufferWithAlignment()</a>, which takes additional parameter <code>minAlignment</code>.</p>
<p>Note the problem of alignment affects only resources placed inside bigger <code>VkDeviceMemory</code> blocks and not dedicated allocations, as these, by definition, always have alignment = 0 because the resource is bound to the beginning of its dedicated block. You can ensure that an allocation is created as dedicated by using <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f" title="Set this flag if the allocation should have its own memory block.">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a>. Contrary to Direct3D 12, Vulkan doesn't have a concept of alignment of the entire memory block passed on its allocation.</p>
<h1><a class="anchor" id="opengl_interop_extended_allocation_information"></a>
Extended allocation information</h1>
<p>If you want to rely on VMA to allocate your buffers and images inside larger memory blocks, but you need to know the size of the entire block and whether the allocation was made with its own dedicated memory, use function <a class="el" href="group__group__alloc.html#ga1405cf3eae2fd1305d645879173031a0" title="Returns extended information about specified allocation.">vmaGetAllocationInfo2()</a> to retrieve extended allocation information in structure <a class="el" href="struct_vma_allocation_info2.html" title="Extended parameters of a VmaAllocation object that can be retrieved using function vmaGetAllocationIn...">VmaAllocationInfo2</a>. </p>
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<div class="textblock"><h1><a class="anchor" id="quick_start_project_setup"></a>
Project setup</h1>
<p>Vulkan Memory Allocator comes in form of a "stb-style" single header file. While you can pull the entire repository e.g. as Git module, there is also Cmake script provided, you don't need to build it as a separate library project. You can add file "vk_mem_alloc.h" directly to your project and submit it to code repository next to your other source files.</p>
<p>"Single header" doesn't mean that everything is contained in C/C++ declarations, like it tends to be in case of inline functions or C++ templates. It means that implementation is bundled with interface in a single file and needs to be extracted using preprocessor macro. If you don't do it properly, it will result in linker errors.</p>
<p>To do it properly:</p>
<ol type="1">
<li>Include "vk_mem_alloc.h" file in each CPP file where you want to use the library. This includes declarations of all members of the library.</li>
<li>In exactly one CPP file define following macro before this include. It enables also internal definitions.</li>
</ol>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_IMPLEMENTATION</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
<div class="ttc" id="avk__mem__alloc_8h_html"><div class="ttname"><a href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a></div></div>
</div><!-- fragment --><p>It may be a good idea to create dedicated CPP file just for this purpose, e.g. "VmaUsage.cpp".</p>
<p>This library includes header <code>&lt;vulkan/vulkan.h&gt;</code>, which in turn includes <code>&lt;windows.h&gt;</code> on Windows. If you need some specific macros defined before including these headers (like <code>WIN32_LEAN_AND_MEAN</code> or <code>WINVER</code> for Windows, <code>VK_USE_PLATFORM_WIN32_KHR</code> for Vulkan), you must define them before every <code>#include</code> of this library. It may be a good idea to create a dedicate header file for this purpose, e.g. "VmaUsage.h", that will be included in other source files instead of VMA header directly.</p>
<p>This library is written in C++, but has C-compatible interface. Thus, you can include and use "vk_mem_alloc.h" in C or C++ code, but full implementation with <code>VMA_IMPLEMENTATION</code> macro must be compiled as C++, NOT as C. Some features of C++14 are used and required. Features of C++20 are used optionally when available. Some headers of standard C and C++ library are used, but STL containers, RTTI, or C++ exceptions are not used.</p>
<h1><a class="anchor" id="quick_start_initialization"></a>
Initialization</h1>
<p>VMA offers library interface in a style similar to Vulkan, with object handles like <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a>, structures describing parameters of objects to be created like <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a>, and errors codes returned from functions using <code>VkResult</code> type.</p>
<p>The first and the main object that needs to be created is <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a>. It represents the initialization of the entire library. Only one such object should be created per <code>VkDevice</code>. You should create it at program startup, after <code>VkDevice</code> was created, and before any device memory allocator needs to be made. It must be destroyed before <code>VkDevice</code> is destroyed.</p>
<p>At program startup:</p>
<ol type="1">
<li>Initialize Vulkan to have <code>VkInstance</code>, <code>VkPhysicalDevice</code>, <code>VkDevice</code> object.</li>
<li>Fill <a class="el" href="struct_vma_allocator_create_info.html" title="Description of a Allocator to be created.">VmaAllocatorCreateInfo</a> structure and call <a class="el" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb" title="Creates VmaAllocator object.">vmaCreateAllocator()</a> to create <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object.</li>
</ol>
<p>Only members <code>physicalDevice</code>, <code>device</code>, <code>instance</code> are required. However, you should inform the library which Vulkan version do you use by setting <a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285" title="Optional. Vulkan version that the application uses.">VmaAllocatorCreateInfo::vulkanApiVersion</a> and which extensions did you enable by setting <a class="el" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346" title="Flags for created allocator. Use VmaAllocatorCreateFlagBits enum.">VmaAllocatorCreateInfo::flags</a>. Otherwise, VMA would use only features of Vulkan 1.0 core with no extensions. See below for details.</p>
<h2><a class="anchor" id="quick_start_initialization_selecting_vulkan_version"></a>
Selecting Vulkan version</h2>
<p>VMA supports Vulkan version down to 1.0, for backward compatibility. If you want to use higher version, you need to inform the library about it. This is a two-step process.</p>
<p><b>Step 1: Compile time.</b> By default, VMA compiles with code supporting the highest Vulkan version found in the included <code>&lt;vulkan/vulkan.h&gt;</code> that is also supported by the library. If this is OK, you don't need to do anything. However, if you want to compile VMA as if only some lower Vulkan version was available, define macro <code>VMA_VULKAN_VERSION</code> before every <code>#include "vk_mem_alloc.h"</code>. It should have decimal numeric value in form of ABBBCCC, where A = major, BBB = minor, CCC = patch Vulkan version. For example, to compile against Vulkan 1.2:</p>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_VULKAN_VERSION 1002000 </span><span class="comment">// Vulkan 1.2</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
</div><!-- fragment --><p><b>Step 2: Runtime.</b> Even when compiled with higher Vulkan version available, VMA can use only features of a lower version, which is configurable during creation of the <a class="el" href="struct_vma_allocator.html" title="Represents main object of this library initialized.">VmaAllocator</a> object. By default, only Vulkan 1.0 is used. To initialize the allocator with support for higher Vulkan version, you need to set member <a class="el" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285" title="Optional. Vulkan version that the application uses.">VmaAllocatorCreateInfo::vulkanApiVersion</a> to an appropriate value, e.g. using constants like <code>VK_API_VERSION_1_2</code>. See code sample below.</p>
<h2><a class="anchor" id="quick_start_initialization_importing_vulkan_functions"></a>
Importing Vulkan functions</h2>
<p>You may need to configure importing Vulkan functions. There are 3 ways to do this:</p>
<ol type="1">
<li><b>If you link with Vulkan static library</b> (e.g. "vulkan-1.lib" on Windows):<ul>
<li>You don't need to do anything.</li>
<li>VMA will use these, as macro <code>VMA_STATIC_VULKAN_FUNCTIONS</code> is defined to 1 by default.</li>
</ul>
</li>
<li><b>If you want VMA to fetch pointers to Vulkan functions dynamically</b> using <code>vkGetInstanceProcAddr</code>, <code>vkGetDeviceProcAddr</code> (this is the option presented in the example below):<ul>
<li>Define <code>VMA_STATIC_VULKAN_FUNCTIONS</code> to 0, <code>VMA_DYNAMIC_VULKAN_FUNCTIONS</code> to 1.</li>
<li>Provide pointers to these two functions via <a class="el" href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849" title="Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.">VmaVulkanFunctions::vkGetInstanceProcAddr</a>, <a class="el" href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57" title="Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.">VmaVulkanFunctions::vkGetDeviceProcAddr</a>.</li>
<li>The library will fetch pointers to all other functions it needs internally.</li>
</ul>
</li>
<li><b>If you fetch pointers to all Vulkan functions in a custom way</b>, e.g. using some loader like <a href="https://github.com/zeux/volk">Volk</a>:<ul>
<li>Define <code>VMA_STATIC_VULKAN_FUNCTIONS</code> and <code>VMA_DYNAMIC_VULKAN_FUNCTIONS</code> to 0.</li>
<li>Pass these pointers via structure <a class="el" href="struct_vma_vulkan_functions.html" title="Pointers to some Vulkan functions - a subset used by the library.">VmaVulkanFunctions</a>.</li>
</ul>
</li>
</ol>
<h2><a class="anchor" id="quick_start_initialization_enabling_extensions"></a>
Enabling extensions</h2>
<p>VMA can automatically use following Vulkan extensions. If you found them available on the selected physical device and you enabled them while creating <code>VkInstance</code> / <code>VkDevice</code> object, inform VMA about their availability by setting appropriate flags in <a class="el" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346" title="Flags for created allocator. Use VmaAllocatorCreateFlagBits enum.">VmaAllocatorCreateInfo::flags</a>.</p>
<table class="markdownTable">
<tr class="markdownTableHead">
<th class="markdownTableHeadNone">Vulkan extension </th><th class="markdownTableHeadNone">VMA flag </th></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyNone">VK_KHR_dedicated_allocation </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878" title="Enables usage of VK_KHR_dedicated_allocation extension.">VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</a> </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyNone">VK_KHR_bind_memory2 </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca8fb75bf07cd184ab903596295e863dee">VMA_ALLOCATOR_CREATE_KHR_BIND_MEMORY2_BIT</a> </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyNone">VK_KHR_maintenance4 </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7caa2566e7f75e19ae7ec9c4fa509fea5fb">VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT</a> </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyNone">VK_KHR_maintenance5 </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7caca82d4ce40bdb59d3da52a539c21d6b8">VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT</a> </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyNone">VK_EXT_memory_budget </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0">VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT</a> </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyNone">VK_KHR_buffer_device_address </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca5f1b28b0414319d1687e1f2b30ab0089">VMA_ALLOCATOR_CREATE_BUFFER_DEVICE_ADDRESS_BIT</a> </td></tr>
<tr class="markdownTableRowOdd">
<td class="markdownTableBodyNone">VK_EXT_memory_priority </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7caffdd7a5169be3dbd7cbf6b3619e4f78a">VMA_ALLOCATOR_CREATE_EXT_MEMORY_PRIORITY_BIT</a> </td></tr>
<tr class="markdownTableRowEven">
<td class="markdownTableBodyNone">VK_AMD_device_coherent_memory </td><td class="markdownTableBodyNone"><a class="el" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca2acce4886d8078552efa38878413970f">VMA_ALLOCATOR_CREATE_AMD_DEVICE_COHERENT_MEMORY_BIT</a> </td></tr>
</table>
<p>Example with fetching pointers to Vulkan functions dynamically:</p>
<div class="fragment"><div class="line"><span class="preprocessor">#define VMA_STATIC_VULKAN_FUNCTIONS 0</span></div>
<div class="line"><span class="preprocessor">#define VMA_DYNAMIC_VULKAN_FUNCTIONS 1</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="vk__mem__alloc_8h.html">vk_mem_alloc.h</a>&quot;</span></div>
<div class="line"> </div>
<div class="line">...</div>
<div class="line"> </div>
<div class="line">VmaVulkanFunctions vulkanFunctions = {};</div>
<div class="line">vulkanFunctions.vkGetInstanceProcAddr = &amp;vkGetInstanceProcAddr;</div>
<div class="line">vulkanFunctions.vkGetDeviceProcAddr = &amp;vkGetDeviceProcAddr;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocator_create_info.html">VmaAllocatorCreateInfo</a> allocatorCreateInfo = {};</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346">flags</a> = <a class="code hl_enumvalue" href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0">VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT</a>;</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285">vulkanApiVersion</a> = VK_API_VERSION_1_2;</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#a08230f04ae6ccf8a78150a9e829a7156">physicalDevice</a> = physicalDevice;</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500">device</a> = device;</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#a70dd42e29b1df1d1b9b61532ae0b370b">instance</a> = instance;</div>
<div class="line">allocatorCreateInfo.<a class="code hl_variable" href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd">pVulkanFunctions</a> = &amp;vulkanFunctions;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocator.html">VmaAllocator</a> allocator;</div>
<div class="line"><a class="code hl_function" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a>(&amp;allocatorCreateInfo, &amp;allocator);</div>
<div class="line"> </div>
<div class="line"><span class="comment">// Entire program...</span></div>
<div class="line"> </div>
<div class="line"><span class="comment">// At the end, don&#39;t forget to:</span></div>
<div class="line"><a class="code hl_function" href="group__group__init.html#gaa8d164061c88f22fb1fd3c8f3534bc1d">vmaDestroyAllocator</a>(allocator);</div>
<div class="ttc" id="agroup__group__init_html_ga200692051ddb34240248234f5f4c17bb"><div class="ttname"><a href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a></div><div class="ttdeci">VkResult vmaCreateAllocator(const VmaAllocatorCreateInfo *pCreateInfo, VmaAllocator *pAllocator)</div><div class="ttdoc">Creates VmaAllocator object.</div></div>
<div class="ttc" id="agroup__group__init_html_gaa8d164061c88f22fb1fd3c8f3534bc1d"><div class="ttname"><a href="group__group__init.html#gaa8d164061c88f22fb1fd3c8f3534bc1d">vmaDestroyAllocator</a></div><div class="ttdeci">void vmaDestroyAllocator(VmaAllocator allocator)</div><div class="ttdoc">Destroys allocator object.</div></div>
<div class="ttc" id="agroup__group__init_html_gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0"><div class="ttname"><a href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7ca4d4687863f7bd4b418c6006dc04400b0">VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:393</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html"><div class="ttname"><a href="struct_vma_allocator_create_info.html">VmaAllocatorCreateInfo</a></div><div class="ttdoc">Description of a Allocator to be created.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1040</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_a08230f04ae6ccf8a78150a9e829a7156"><div class="ttname"><a href="struct_vma_allocator_create_info.html#a08230f04ae6ccf8a78150a9e829a7156">VmaAllocatorCreateInfo::physicalDevice</a></div><div class="ttdeci">VkPhysicalDevice physicalDevice</div><div class="ttdoc">Vulkan physical device.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1045</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_a392ea2ecbaff93f91a7c49f735ad4346"><div class="ttname"><a href="struct_vma_allocator_create_info.html#a392ea2ecbaff93f91a7c49f735ad4346">VmaAllocatorCreateInfo::flags</a></div><div class="ttdeci">VmaAllocatorCreateFlags flags</div><div class="ttdoc">Flags for created allocator. Use VmaAllocatorCreateFlagBits enum.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1042</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_a3dc197be3227da7338b1643f70db36bd"><div class="ttname"><a href="struct_vma_allocator_create_info.html#a3dc197be3227da7338b1643f70db36bd">VmaAllocatorCreateInfo::pVulkanFunctions</a></div><div class="ttdeci">const VmaVulkanFunctions * pVulkanFunctions</div><div class="ttdoc">Pointers to Vulkan functions. Can be null.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1088</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_a70dd42e29b1df1d1b9b61532ae0b370b"><div class="ttname"><a href="struct_vma_allocator_create_info.html#a70dd42e29b1df1d1b9b61532ae0b370b">VmaAllocatorCreateInfo::instance</a></div><div class="ttdeci">VkInstance instance</div><div class="ttdoc">Handle to Vulkan instance object.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1093</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_ad924ddd77b04039c88d0c09b0ffcd500"><div class="ttname"><a href="struct_vma_allocator_create_info.html#ad924ddd77b04039c88d0c09b0ffcd500">VmaAllocatorCreateInfo::device</a></div><div class="ttdeci">VkDevice device</div><div class="ttdoc">Vulkan device.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1048</div></div>
<div class="ttc" id="astruct_vma_allocator_create_info_html_ae0ffc55139b54520a6bb704b29ffc285"><div class="ttname"><a href="struct_vma_allocator_create_info.html#ae0ffc55139b54520a6bb704b29ffc285">VmaAllocatorCreateInfo::vulkanApiVersion</a></div><div class="ttdeci">uint32_t vulkanApiVersion</div><div class="ttdoc">Optional. Vulkan version that the application uses.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1104</div></div>
<div class="ttc" id="astruct_vma_allocator_html"><div class="ttname"><a href="struct_vma_allocator.html">VmaAllocator</a></div><div class="ttdoc">Represents main object of this library initialized.</div></div>
</div><!-- fragment --><h2><a class="anchor" id="quick_start_initialization_other_config"></a>
Other configuration options</h2>
<p>There are additional configuration options available through preprocessor macros that you can define before including VMA header and through parameters passed in <a class="el" href="struct_vma_allocator_create_info.html" title="Description of a Allocator to be created.">VmaAllocatorCreateInfo</a>. They include a possibility to use your own callbacks for host memory allocations (<code>VkAllocationCallbacks</code>), callbacks for device memory allocations (instead of <code>vkAllocateMemory</code>, <code>vkFreeMemory</code>), or your custom <code>VMA_ASSERT</code> macro, among others. For more information, see: <a class="el" href="configuration.html">Configuration</a>.</p>
<h1><a class="anchor" id="quick_start_resource_allocation"></a>
Resource allocation</h1>
<p>When you want to create a buffer or image:</p>
<ol type="1">
<li>Fill <code>VkBufferCreateInfo</code> / <code>VkImageCreateInfo</code> structure.</li>
<li>Fill <a class="el" href="struct_vma_allocation_create_info.html" title="Parameters of new VmaAllocation.">VmaAllocationCreateInfo</a> structure.</li>
<li>Call <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51" title="Creates a new VkBuffer, allocates and binds memory for it.">vmaCreateBuffer()</a> / <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a> to get <code>VkBuffer</code>/<code>VkImage</code> with memory already allocated and bound to it, plus <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a> objects that represents its underlying memory.</li>
</ol>
<div class="fragment"><div class="line">VkBufferCreateInfo bufferInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };</div>
<div class="line">bufferInfo.size = 65536;</div>
<div class="line">bufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocInfo = {};</div>
<div class="line">allocInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">usage</a> = <a class="code hl_enumvalue" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a>;</div>
<div class="line"> </div>
<div class="line">VkBuffer buffer;</div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a>(allocator, &amp;bufferInfo, &amp;allocInfo, &amp;buffer, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_gac72ee55598617e8eecca384e746bab51"><div class="ttname"><a href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer</a></div><div class="ttdeci">VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Creates a new VkBuffer, allocates and binds memory for it.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e"><div class="ttname"><a href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a></div><div class="ttdeci">@ VMA_MEMORY_USAGE_AUTO</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:527</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_accb8b06b1f677d858cb9af20705fa910"><div class="ttname"><a href="struct_vma_allocation_create_info.html#accb8b06b1f677d858cb9af20705fa910">VmaAllocationCreateInfo::usage</a></div><div class="ttdeci">VmaMemoryUsage usage</div><div class="ttdoc">Intended usage of memory.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1271</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
</div><!-- fragment --><p>Don't forget to destroy your buffer and allocation objects when no longer needed:</p>
<div class="fragment"><div class="line"><a class="code hl_function" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a>(allocator, buffer, allocation);</div>
<div class="ttc" id="agroup__group__alloc_html_ga0d9f4e4ba5bf9aab1f1c746387753d77"><div class="ttname"><a href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a></div><div class="ttdeci">void vmaDestroyBuffer(VmaAllocator allocator, VkBuffer buffer, VmaAllocation allocation)</div><div class="ttdoc">Destroys Vulkan buffer and frees allocated memory.</div></div>
</div><!-- fragment --><p>If you need to map the buffer, you must set flag <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a9be224df3bfc1cfa06203aed689a30c5">VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT</a> or <a class="el" href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492">VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT</a> in <a class="el" href="struct_vma_allocation_create_info.html#add09658ac14fe290ace25470ddd6d41b" title="Use VmaAllocationCreateFlagBits enum.">VmaAllocationCreateInfo::flags</a>. There are many additional parameters that can control the choice of memory type to be used for the allocation and other features. For more information, see documentation chapters: <a class="el" href="choosing_memory_type.html">Choosing memory type</a>, <a class="el" href="memory_mapping.html">Memory mapping</a>. </p>
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<div class="textblock"><p>New explicit graphics APIs (Vulkan and Direct3D 12), thanks to manual memory management, give an opportunity to alias (overlap) multiple resources in the same region of memory - a feature not available in the old APIs (Direct3D 11, OpenGL). It can be useful to save video memory, but it must be used with caution.</p>
<p>For example, if you know the flow of your whole render frame in advance, you are going to use some intermediate textures or buffers only during a small range of render passes, and you know these ranges don't overlap in time, you can bind these resources to the same place in memory, even if they have completely different parameters (width, height, format etc.).</p>
<p><img src="../gfx/Aliasing.png" alt="Resource aliasing (overlap)" class="inline"/></p>
<p>Such scenario is possible using VMA, but you need to create your images manually. Then you need to calculate parameters of an allocation to be made using formula:</p>
<ul>
<li>allocation size = max(size of each image)</li>
<li>allocation alignment = max(alignment of each image)</li>
<li>allocation memoryTypeBits = bitwise AND(memoryTypeBits of each image)</li>
</ul>
<p>Following example shows two different images bound to the same place in memory, allocated to fit largest of them.</p>
<div class="fragment"><div class="line"><span class="comment">// A 512x512 texture to be sampled.</span></div>
<div class="line">VkImageCreateInfo img1CreateInfo = { VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };</div>
<div class="line">img1CreateInfo.imageType = VK_IMAGE_TYPE_2D;</div>
<div class="line">img1CreateInfo.extent.width = 512;</div>
<div class="line">img1CreateInfo.extent.height = 512;</div>
<div class="line">img1CreateInfo.extent.depth = 1;</div>
<div class="line">img1CreateInfo.mipLevels = 10;</div>
<div class="line">img1CreateInfo.arrayLayers = 1;</div>
<div class="line">img1CreateInfo.format = VK_FORMAT_R8G8B8A8_SRGB;</div>
<div class="line">img1CreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;</div>
<div class="line">img1CreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;</div>
<div class="line">img1CreateInfo.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;</div>
<div class="line">img1CreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;</div>
<div class="line"> </div>
<div class="line"><span class="comment">// A full screen texture to be used as color attachment.</span></div>
<div class="line">VkImageCreateInfo img2CreateInfo = { VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO };</div>
<div class="line">img2CreateInfo.imageType = VK_IMAGE_TYPE_2D;</div>
<div class="line">img2CreateInfo.extent.width = 1920;</div>
<div class="line">img2CreateInfo.extent.height = 1080;</div>
<div class="line">img2CreateInfo.extent.depth = 1;</div>
<div class="line">img2CreateInfo.mipLevels = 1;</div>
<div class="line">img2CreateInfo.arrayLayers = 1;</div>
<div class="line">img2CreateInfo.format = VK_FORMAT_R8G8B8A8_UNORM;</div>
<div class="line">img2CreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;</div>
<div class="line">img2CreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;</div>
<div class="line">img2CreateInfo.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;</div>
<div class="line">img2CreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;</div>
<div class="line"> </div>
<div class="line">VkImage img1;</div>
<div class="line">res = vkCreateImage(device, &amp;img1CreateInfo, <span class="keyword">nullptr</span>, &amp;img1);</div>
<div class="line">VkImage img2;</div>
<div class="line">res = vkCreateImage(device, &amp;img2CreateInfo, <span class="keyword">nullptr</span>, &amp;img2);</div>
<div class="line"> </div>
<div class="line">VkMemoryRequirements img1MemReq;</div>
<div class="line">vkGetImageMemoryRequirements(device, img1, &amp;img1MemReq);</div>
<div class="line">VkMemoryRequirements img2MemReq;</div>
<div class="line">vkGetImageMemoryRequirements(device, img2, &amp;img2MemReq);</div>
<div class="line"> </div>
<div class="line">VkMemoryRequirements finalMemReq = {};</div>
<div class="line">finalMemReq.size = std::max(img1MemReq.size, img2MemReq.size);</div>
<div class="line">finalMemReq.alignment = std::max(img1MemReq.alignment, img2MemReq.alignment);</div>
<div class="line">finalMemReq.memoryTypeBits = img1MemReq.memoryTypeBits &amp; img2MemReq.memoryTypeBits;</div>
<div class="line"><span class="comment">// Validate if(finalMemReq.memoryTypeBits != 0)</span></div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">preferredFlags</a> = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;</div>
<div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> alloc;</div>
<div class="line">res = <a class="code hl_function" href="group__group__alloc.html#gabf28077dbf82d0908b8acbe8ee8dd9b8">vmaAllocateMemory</a>(allocator, &amp;finalMemReq, &amp;allocCreateInfo, &amp;alloc, <span class="keyword">nullptr</span>);</div>
<div class="line"> </div>
<div class="line">res = <a class="code hl_function" href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vmaBindImageMemory</a>(allocator, alloc, img1);</div>
<div class="line">res = <a class="code hl_function" href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vmaBindImageMemory</a>(allocator, alloc, img2);</div>
<div class="line"> </div>
<div class="line"><span class="comment">// You can use img1, img2 here, but not at the same time!</span></div>
<div class="line"> </div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga5fea5518972ae9094b1526cbcb19b05f">vmaFreeMemory</a>(allocator, alloc);</div>
<div class="line">vkDestroyImage(allocator, img2, <span class="keyword">nullptr</span>);</div>
<div class="line">vkDestroyImage(allocator, img1, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ga3d3ca45799923aa5d138e9e5f9eb2da5"><div class="ttname"><a href="group__group__alloc.html#ga3d3ca45799923aa5d138e9e5f9eb2da5">vmaBindImageMemory</a></div><div class="ttdeci">VkResult vmaBindImageMemory(VmaAllocator allocator, VmaAllocation allocation, VkImage image)</div><div class="ttdoc">Binds image to allocation.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ga5fea5518972ae9094b1526cbcb19b05f"><div class="ttname"><a href="group__group__alloc.html#ga5fea5518972ae9094b1526cbcb19b05f">vmaFreeMemory</a></div><div class="ttdeci">void vmaFreeMemory(VmaAllocator allocator, const VmaAllocation allocation)</div><div class="ttdoc">Frees memory previously allocated using vmaAllocateMemory(), vmaAllocateMemoryForBuffer(),...</div></div>
<div class="ttc" id="agroup__group__alloc_html_gabf28077dbf82d0908b8acbe8ee8dd9b8"><div class="ttname"><a href="group__group__alloc.html#gabf28077dbf82d0908b8acbe8ee8dd9b8">vmaAllocateMemory</a></div><div class="ttdeci">VkResult vmaAllocateMemory(VmaAllocator allocator, const VkMemoryRequirements *pVkMemoryRequirements, const VmaAllocationCreateInfo *pCreateInfo, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">General purpose memory allocation.</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html"><div class="ttname"><a href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a></div><div class="ttdoc">Parameters of new VmaAllocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1263</div></div>
<div class="ttc" id="astruct_vma_allocation_create_info_html_a7fe8d81a1ad10b2a2faacacee5b15d6d"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a7fe8d81a1ad10b2a2faacacee5b15d6d">VmaAllocationCreateInfo::preferredFlags</a></div><div class="ttdeci">VkMemoryPropertyFlags preferredFlags</div><div class="ttdoc">Flags that preferably should be set in a memory type chosen for an allocation.</div><div class="ttdef"><b>Definition</b> vk_mem_alloc.h:1281</div></div>
<div class="ttc" id="astruct_vma_allocation_html"><div class="ttname"><a href="struct_vma_allocation.html">VmaAllocation</a></div><div class="ttdoc">Represents single memory allocation.</div></div>
</div><!-- fragment --><p>VMA also provides convenience functions that create a buffer or image and bind it to memory represented by an existing <a class="el" href="struct_vma_allocation.html" title="Represents single memory allocation.">VmaAllocation</a>: <a class="el" href="group__group__alloc.html#ga60d5d4803e3c82505a2bfddb929adb03" title="Creates a new VkBuffer, binds already created memory for it.">vmaCreateAliasingBuffer()</a>, <a class="el" href="group__group__alloc.html#gaf0cf014344213e117bd9f9cf5f928122" title="Creates a new VkBuffer, binds already created memory for it.">vmaCreateAliasingBuffer2()</a>, <a class="el" href="group__group__alloc.html#gaebc4db1f94b53dba2338b4c0fd80d0dc" title="Function similar to vmaCreateAliasingBuffer() but for images.">vmaCreateAliasingImage()</a>, <a class="el" href="group__group__alloc.html#ga69ac829f5bb0737449fa92c2d971f1bb" title="Function similar to vmaCreateAliasingBuffer2() but for images.">vmaCreateAliasingImage2()</a>. Versions with "2" offer additional parameter <code>allocationLocalOffset</code>.</p>
<p>Remember that using resources that alias in memory requires proper synchronization. You need to issue a memory barrier to make sure commands that use <code>img1</code> and <code>img2</code> don't overlap on GPU timeline. You also need to treat a resource after aliasing as uninitialized - containing garbage data. For example, if you use <code>img1</code> and then want to use <code>img2</code>, you need to issue an image memory barrier for <code>img2</code> with <code>oldLayout</code> = <code>VK_IMAGE_LAYOUT_UNDEFINED</code>.</p>
<p>Additional considerations:</p>
<ul>
<li>Vulkan also allows to interpret contents of memory between aliasing resources consistently in some cases. See chapter 11.8. "Memory Aliasing" of Vulkan specification or <code>VK_IMAGE_CREATE_ALIAS_BIT</code> flag.</li>
<li>You can create more complex layout where different images and buffers are bound at different offsets inside one large allocation. For example, one can imagine a big texture used in some render passes, aliasing with a set of many small buffers used between in some further passes. To bind a resource at non-zero offset in an allocation, use <a class="el" href="group__group__alloc.html#ga861f4f27189a7d11ab9d9eedc825cb6b" title="Binds buffer to allocation with additional parameters.">vmaBindBufferMemory2()</a> / <a class="el" href="group__group__alloc.html#ga5f3502dd7d38b53fb1533ea3921d038d" title="Binds image to allocation with additional parameters.">vmaBindImageMemory2()</a>.</li>
<li>Before allocating memory for the resources you want to alias, check <code>memoryTypeBits</code> returned in memory requirements of each resource to make sure the bits overlap. Some GPUs may expose multiple memory types suitable e.g. only for buffers or images with <code>COLOR_ATTACHMENT</code> usage, so the sets of memory types supported by your resources may be disjoint. Aliasing them is not possible in that case. </li>
</ul>
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