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Added documentation chapter "Versioning and compatibility"

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Many improvements in documentation and README.
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Adam Sawicki 2022-02-26 13:26:20 +01:00
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17 changed files with 150 additions and 104 deletions
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20
README.md
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@ -39,9 +39,9 @@ This library can help game developers to manage memory allocations and resource
Additional features: Additional features:
- Well-documented - description of all functions and structures provided, along with chapters that contain general description and example code. - Well-documented - description of all functions and structures provided, along with chapters that contain general description and example code.
- Thread-safety: Library is designed to be used in multithreaded code. Access to a single device memory block referred by different buffers and textures (binding, mapping) is synchronized internally. - Thread-safety: Library is designed to be used in multithreaded code. Access to a single device memory block referred by different buffers and textures (binding, mapping) is synchronized internally. Memory mapping is reference-counted.
- Configuration: Fill optional members of CreateInfo structure to provide custom CPU memory allocator, pointers to Vulkan functions and other parameters. - Configuration: Fill optional members of `VmaAllocatorCreateInfo` structure to provide custom CPU memory allocator, pointers to Vulkan functions and other parameters.
- Customization: Predefine appropriate macros to provide your own implementation of all external facilities used by the library, from assert, mutex, and atomic, to vector and linked list. - Customization: Predefine appropriate macros to provide your own implementation of all external facilities used by the library like assert, mutex, atomic.
- Support for memory mapping, reference-counted internally. Support for persistently mapped memory: Just allocate with appropriate flag and you get access to mapped pointer. - Support for memory mapping, reference-counted internally. Support for persistently mapped memory: Just allocate with appropriate flag and you get access to mapped pointer.
- Support for non-coherent memory. Functions that flush/invalidate memory. `nonCoherentAtomSize` is respected automatically. - Support for non-coherent memory. Functions that flush/invalidate memory. `nonCoherentAtomSize` is respected automatically.
- Support for resource aliasing (overlap). - Support for resource aliasing (overlap).
@ -50,10 +50,11 @@ Additional features:
- Linear allocator: Create a pool with linear algorithm and use it for much faster allocations and deallocations in free-at-once, stack, double stack, or ring buffer fashion. - Linear allocator: Create a pool with linear algorithm and use it for much faster allocations and deallocations in free-at-once, stack, double stack, or ring buffer fashion.
- Support for Vulkan 1.0, 1.1, 1.2, 1.3. - Support for Vulkan 1.0, 1.1, 1.2, 1.3.
- Support for extensions (and equivalent functionality included in new Vulkan versions): - Support for extensions (and equivalent functionality included in new Vulkan versions):
- VK_EXT_memory_budget: Used internally if available to query for current usage and budget. If not available, it falls back to an estimation based on memory heap sizes.
- VK_KHR_dedicated_allocation: Just enable it and it will be used automatically by the library. - VK_KHR_dedicated_allocation: Just enable it and it will be used automatically by the library.
- VK_KHR_buffer_device_address: Flag `VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT_KHR` is automatically added to memory allocations where needed.
- VK_EXT_memory_budget: Used internally if available to query for current usage and budget. If not available, it falls back to an estimation based on memory heap sizes.
- VK_EXT_memory_priority: Set `priority` of allocations or custom pools and it will be set automatically using this extension.
- VK_AMD_device_coherent_memory - VK_AMD_device_coherent_memory
- VK_KHR_buffer_device_address
- Defragmentation of GPU and CPU memory: Let the library move data around to free some memory blocks and make your allocations better compacted. - Defragmentation of GPU and CPU memory: Let the library move data around to free some memory blocks and make your allocations better compacted.
- Statistics: Obtain detailed statistics about the amount of memory used, unused, number of allocated blocks, number of allocations etc. - globally, per memory heap, and per memory type. - Statistics: Obtain detailed statistics about the amount of memory used, unused, number of allocated blocks, number of allocations etc. - globally, per memory heap, and per memory type.
- Debug annotations: Associate string with name or opaque pointer to your own data with every allocation. - Debug annotations: Associate string with name or opaque pointer to your own data with every allocation.
@ -65,7 +66,7 @@ Additional features:
# Prequisites # Prequisites
- Self-contained C++ library in single header file. No external dependencies other than standard C and C++ library and of course Vulkan. Some features of C++14 used. STL containers are not used. - Self-contained C++ library in single header file. No external dependencies other than standard C and C++ library and of course Vulkan. Some features of C++14 used. STL containers or C++ exceptions are not used.
- Public interface in C, in same convention as Vulkan API. Implementation in C++. - Public interface in C, in same convention as Vulkan API. Implementation in C++.
- Error handling implemented by returning `VkResult` error codes - same way as in Vulkan. - Error handling implemented by returning `VkResult` error codes - same way as in Vulkan.
- Interface documented using Doxygen-style comments. - Interface documented using Doxygen-style comments.
@ -94,7 +95,7 @@ With this one function call:
2. `VkDeviceMemory` block is allocated if needed. 2. `VkDeviceMemory` block is allocated if needed.
3. An unused region of the memory block is bound to this buffer. 3. An unused region of the memory block is bound to this buffer.
`VmaAllocation` is an object that represents memory assigned to this buffer. It can be queried for parameters like Vulkan memory handle and offset. `VmaAllocation` is an object that represents memory assigned to this buffer. It can be queried for parameters like `VkDeviceMemory` handle and offset.
# How to build # How to build
@ -115,9 +116,8 @@ The following targets are available
| ------------- | ------------- | ------------- | ------------- | | ------------- | ------------- | ------------- | ------------- |
| VmaSample | VMA sample application | `VMA_BUILD_SAMPLE` | `OFF` | | VmaSample | VMA sample application | `VMA_BUILD_SAMPLE` | `OFF` |
| VmaBuildSampleShaders | Shaders for VmaSample | `VMA_BUILD_SAMPLE_SHADERS` | `OFF` | | VmaBuildSampleShaders | Shaders for VmaSample | `VMA_BUILD_SAMPLE_SHADERS` | `OFF` |
| VmaReplay | Replay tool for VMA .csv trace files | `VMA_BUILD_REPLAY` | `OFF` |
Please note that while VulkanMemoryAllocator library is supported on other platforms besides Windows, VmaSample and VmaReplay are not. Please note that while VulkanMemoryAllocator library is supported on other platforms besides Windows, VmaSample is not.
These CMake options are available These CMake options are available
@ -134,7 +134,7 @@ These CMake options are available
# Binaries # Binaries
The release comes with precompiled binary executables for "VulkanSample" application which contains test suite and "VmaReplay" tool. They are compiled using Visual Studio 2019, so they require appropriate libraries to work, including "MSVCP140.dll", "VCRUNTIME140.dll", "VCRUNTIME140_1.dll". If their launch fails with error message telling about those files missing, please download and install [Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019](https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads), "x64" version. The release comes with precompiled binary executable for "VulkanSample" application which contains test suite. It is compiled using Visual Studio 2019, so it requires appropriate libraries to work, including "MSVCP140.dll", "VCRUNTIME140.dll", "VCRUNTIME140_1.dll". If the launch fails with error message telling about those files missing, please download and install [Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019](https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads), "x64" version.
# Read more # Read more

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docs/html/allocation_annotation.html
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@ -84,18 +84,18 @@ Allocation user data</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</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="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> <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>
<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:488</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:489</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1250</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:1251</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:1219</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:1220</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_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><!-- 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="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"><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="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="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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1326</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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1327</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:1373</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:1374</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> </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> <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> <h1><a class="anchor" id="allocation_names"></a>
@ -115,8 +115,8 @@ Allocation names</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</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#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a>(allocator, &amp;imageInfo, &amp;allocCreateInfo, &amp;image, &amp;allocation, <span class="keyword">nullptr</span>);</div> <div class="line"><a class="code hl_function" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a>(allocator, &amp;imageInfo, &amp;allocCreateInfo, &amp;image, &amp;allocation, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ga02a94f25679275851a53e82eacbcfc73"><div class="ttname"><a href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a></div><div class="ttdeci">VkResult vmaCreateImage(VmaAllocator allocator, const VkImageCreateInfo *pImageCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkImage *pImage, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Function similar to vmaCreateBuffer().</div></div> <div class="ttc" id="agroup__group__alloc_html_ga02a94f25679275851a53e82eacbcfc73"><div class="ttname"><a href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a></div><div class="ttdeci">VkResult vmaCreateImage(VmaAllocator allocator, const VkImageCreateInfo *pImageCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkImage *pImage, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Function similar to vmaCreateBuffer().</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597aa6f24f821cd6a7c5e4a443f7bf59c520"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597aa6f24f821cd6a7c5e4a443f7bf59c520">VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:556</div></div> <div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597aa6f24f821cd6a7c5e4a443f7bf59c520"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597aa6f24f821cd6a7c5e4a443f7bf59c520">VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:557</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:1213</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:1214</div></div>
</div><!-- fragment --><p >The value of <code>pUserData</code> pointer of the allocation will be different than the one you passed when setting allocation's name - pointing to a buffer managed internally that holds copy of the string.</p> </div><!-- fragment --><p >The value of <code>pUserData</code> pointer of the allocation will be different than the one you passed when setting allocation's name - pointing to a buffer managed internally that holds copy of the string.</p>
<div class="fragment"><div class="line"><a class="code hl_struct" href="struct_vma_allocation_info.html">VmaAllocationInfo</a> allocInfo;</div> <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"><a class="code hl_function" href="group__group__alloc.html#ga86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a>(allocator, allocation, &amp;allocInfo);</div>

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@ -94,9 +94,9 @@ Usage</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</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="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> <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>
<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:488</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:489</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1219</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:1220</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_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> </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 >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>
@ -112,8 +112,8 @@ Usage</h1>
<div class="line">VkBuffer stagingBuffer;</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_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="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:593</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:594</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:1213</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:1214</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>.</p> </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>.</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">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 decribed below.</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">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 decribed 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 not recommended.</dd></dl> <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 not recommended.</dd></dl>
@ -128,10 +128,10 @@ Required and preferred flags</h1>
<div class="line">VkBuffer buffer;</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_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="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:546</div></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:547</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:605</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:606</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:1229</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:1230</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:1224</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:1225</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> </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> <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> <h1><a class="anchor" id="choosing_memory_type_explicit_memory_types"></a>
@ -146,7 +146,7 @@ Explicit memory types</h1>
<div class="line">VkBuffer buffer;</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_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="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:1237</div></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:1238</div></div>
</div><!-- fragment --><h1><a class="anchor" id="choosing_memory_type_custom_memory_pools"></a> </div><!-- fragment --><h1><a class="anchor" id="choosing_memory_type_custom_memory_pools"></a>
Custom memory pools</h1> 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">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> <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">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>

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@ -109,13 +109,13 @@ $(function() {
<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"><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="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_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> <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>
<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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1243</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:1244</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_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_allocation_info_html"><div class="ttname"><a href="struct_vma_allocation_info.html">VmaAllocationInfo</a></div><div class="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1326</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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1327</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:1262</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:1263</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:1265</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:1266</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:1291</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:1292</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 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><!-- 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="fragment"><div class="line"><a class="code hl_function" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a>(allocator, buf, alloc);</div>
@ -141,8 +141,8 @@ Choosing memory type index</h1>
<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#a596fa76b685d3f1f688f84a709a5b319">memoryTypeIndex</a> = memTypeIndex;</div>
<div class="line"><span class="comment">// ...</span></div> <div class="line"><span class="comment">// ...</span></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_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:488</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:489</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:1219</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:1220</div></div>
</div><!-- fragment --><p >When creating buffers/images allocated in that pool, provide following parameters:</p> </div><!-- fragment --><p >When creating buffers/images allocated in that pool, provide following parameters:</p>
<ul> <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><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>
@ -181,6 +181,7 @@ 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 >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 ><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> <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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@ -111,18 +111,19 @@ $(function() {
<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_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_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_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:700</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:701</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_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:1381</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:1382</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:1388</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:1389</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:1383</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:1384</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:1421</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:1422</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:1423</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:1424</div></div>
</div><!-- fragment --><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> </div><!-- fragment --><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 >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 dstMemory + dstOffset will be fr...">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a>. However, 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 >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 dstMemory + dstOffset will be fr...">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 >You can also decide to destroy an allocation instead of moving it. You should then 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>.</p> <p >You can also decide to destroy an allocation instead of moving it. You should then 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>.</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 >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 >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>
<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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@ -78,6 +78,16 @@ Thread safety</h1>
<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>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> <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> </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 compatiblity 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> <h1><a class="anchor" id="general_considerations_validation_layer_warnings"></a>
Validation layer warnings</h1> 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> <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>

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@ -128,7 +128,7 @@ Typedefs</h2></td></tr>
<tr class="memitem:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga88a77cef37e5d3c4fc9eb328885d048d">VmaDefragmentationFlags</a></td></tr> <tr class="memitem:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga88a77cef37e5d3c4fc9eb328885d048d">VmaDefragmentationFlags</a></td></tr>
<tr class="separator:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">VmaDefragmentationMoveOperation</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">VmaDefragmentationMoveOperation</a></td></tr> <tr class="memitem:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">VmaDefragmentationMoveOperation</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">VmaDefragmentationMoveOperation</a></td></tr>
<tr class="memdesc:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. <a href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">More...</a><br /></td></tr> <tr class="memdesc:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. <a href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">More...</a><br /></td></tr>
<tr class="separator:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga3bf110892ea2fb4649fedb68488d026a"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga3bf110892ea2fb4649fedb68488d026a">VmaAllocationCreateInfo</a></td></tr> <tr class="memitem:ga3bf110892ea2fb4649fedb68488d026a"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga3bf110892ea2fb4649fedb68488d026a">VmaAllocationCreateInfo</a></td></tr>
<tr class="separator:ga3bf110892ea2fb4649fedb68488d026a"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:ga3bf110892ea2fb4649fedb68488d026a"><td class="memSeparator" colspan="2">&#160;</td></tr>
@ -223,7 +223,7 @@ Enumerations</h2></td></tr>
, <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a> = 1 , <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a> = 1
, <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257a9786f8492a9be2c03bd26395e352ab85">VMA_DEFRAGMENTATION_MOVE_OPERATION_DESTROY</a> = 2 , <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257a9786f8492a9be2c03bd26395e352ab85">VMA_DEFRAGMENTATION_MOVE_OPERATION_DESTROY</a> = 2
}</td></tr> }</td></tr>
<tr class="memdesc:gada9e3861caf96f08894b0bcc160ec257"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. <a href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">More...</a><br /></td></tr> <tr class="memdesc:gada9e3861caf96f08894b0bcc160ec257"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. <a href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">More...</a><br /></td></tr>
<tr class="separator:gada9e3861caf96f08894b0bcc160ec257"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:gada9e3861caf96f08894b0bcc160ec257"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls"> </table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
@ -476,7 +476,7 @@ Functions</h2></td></tr>
</table> </table>
</div><div class="memdoc"> </div><div class="memdoc">
<p>Operation performed on single defragmentation move. </p> <p>Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. </p>
</div> </div>
</div> </div>
@ -626,14 +626,14 @@ Functions</h2></td></tr>
<li>If you use other value of <a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc" title="Intended usage of the allocated memory.">VmaMemoryUsage</a>, this flag is ignored and mapping is always possible in memory types that are <code>HOST_VISIBLE</code>. This includes allocations created in <a class="el" href="custom_memory_pools.html">Custom memory pools</a>.</li> <li>If you use other value of <a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc" title="Intended usage of the allocated memory.">VmaMemoryUsage</a>, this flag is ignored and mapping is always possible in memory types that are <code>HOST_VISIBLE</code>. This includes allocations created in <a class="el" href="custom_memory_pools.html">Custom memory pools</a>.</li>
</ul> </ul>
<p >Declares that mapped memory will only be written sequentially, e.g. using <code>memcpy()</code> or a loop writing number-by-number, never read or accessed randomly, so a memory type can be selected that is uncached and write-combined.</p> <p >Declares that mapped memory will only be written sequentially, e.g. using <code>memcpy()</code> or a loop writing number-by-number, never read or accessed randomly, so a memory type can be selected that is uncached and write-combined.</p>
<dl class="section warning"><dt>Warning</dt><dd>Violating this declaration may work correctly, but will likely be very slow. Watch out for implicit reads introduces by doing e.g. <code>pMappedData[i] += x;</code> Better prepare your data in a local variable and <code>memcpy()</code> it to the mapped pointer all at once. </dd></dl> <dl class="section warning"><dt>Warning</dt><dd>Violating this declaration may work correctly, but will likely be very slow. Watch out for implicit reads introduced by doing e.g. <code>pMappedData[i] += x;</code> Better prepare your data in a local variable and <code>memcpy()</code> it to the mapped pointer all at once. </dd></dl>
</td></tr> </td></tr>
<tr><td class="fieldname"><a id="ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492" name="ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492"></a>VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT&#160;</td><td class="fielddoc"><p >Requests possibility to map the allocation (using <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> or <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>).</p> <tr><td class="fieldname"><a id="ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492" name="ggad9889c10c798b040d59c92f257cae597add61238d98e20917b9a06c617763f492"></a>VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT&#160;</td><td class="fielddoc"><p >Requests possibility to map the allocation (using <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> or <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>).</p>
<ul> <ul>
<li>If you use <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a> or other <code>VMA_MEMORY_USAGE_AUTO*</code> value, you must use this flag to be able to map the allocation. Otherwise, mapping is incorrect.</li> <li>If you use <a class="el" href="group__group__alloc.html#ggaa5846affa1e9da3800e3e78fae2305cca27cde9026a84d34d525777baa41fce6e">VMA_MEMORY_USAGE_AUTO</a> or other <code>VMA_MEMORY_USAGE_AUTO*</code> value, you must use this flag to be able to map the allocation. Otherwise, mapping is incorrect.</li>
<li>If you use other value of <a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc" title="Intended usage of the allocated memory.">VmaMemoryUsage</a>, this flag is ignored and mapping is always possible in memory types that are <code>HOST_VISIBLE</code>. This includes allocations created in <a class="el" href="custom_memory_pools.html">Custom memory pools</a>.</li> <li>If you use other value of <a class="el" href="group__group__alloc.html#gaa5846affa1e9da3800e3e78fae2305cc" title="Intended usage of the allocated memory.">VmaMemoryUsage</a>, this flag is ignored and mapping is always possible in memory types that are <code>HOST_VISIBLE</code>. This includes allocations created in <a class="el" href="custom_memory_pools.html">Custom memory pools</a>.</li>
</ul> </ul>
<p >Declares that mapped memory can be read, written, and accessed in random order, so a <code>HOST_CACHED</code> memory type is preferred. </p> <p >Declares that mapped memory can be read, written, and accessed in random order, so a <code>HOST_CACHED</code> memory type is required. </p>
</td></tr> </td></tr>
<tr><td class="fieldname"><a id="ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad" name="ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad"></a>VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT&#160;</td><td class="fielddoc"><p >Together with <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>, it says that despite request for host access, a not-<code>HOST_VISIBLE</code> memory type can be selected if it may improve performance.</p> <tr><td class="fieldname"><a id="ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad" name="ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad"></a>VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT&#160;</td><td class="fielddoc"><p >Together with <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>, it says that despite request for host access, a not-<code>HOST_VISIBLE</code> memory type can be selected if it may improve performance.</p>
<p >By using this flag, you declare that you will check if the allocation ended up in a <code>HOST_VISIBLE</code> memory type (e.g. using <a class="el" href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1" title="Given an allocation, returns Property Flags of its memory type.">vmaGetAllocationMemoryProperties()</a>) and if not, you will create some "staging" buffer and issue an explicit transfer to write/read your data. To prepare for this possibility, don't forget to add appropriate flags like <code>VK_BUFFER_USAGE_TRANSFER_DST_BIT</code>, <code>VK_BUFFER_USAGE_TRANSFER_SRC_BIT</code> to the parameters of created buffer or image. </p> <p >By using this flag, you declare that you will check if the allocation ended up in a <code>HOST_VISIBLE</code> memory type (e.g. using <a class="el" href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1" title="Given an allocation, returns Property Flags of its memory type.">vmaGetAllocationMemoryProperties()</a>) and if not, you will create some "staging" buffer and issue an explicit transfer to write/read your data. To prepare for this possibility, don't forget to add appropriate flags like <code>VK_BUFFER_USAGE_TRANSFER_DST_BIT</code>, <code>VK_BUFFER_USAGE_TRANSFER_SRC_BIT</code> to the parameters of created buffer or image. </p>
@ -693,7 +693,7 @@ Functions</h2></td></tr>
</table> </table>
</div><div class="memdoc"> </div><div class="memdoc">
<p>Operation performed on single defragmentation move. </p> <p>Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. </p>
<table class="fieldtable"> <table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="ggada9e3861caf96f08894b0bcc160ec257ad4a06ac46c4cb1c67b0ebc1edfab9f18" name="ggada9e3861caf96f08894b0bcc160ec257ad4a06ac46c4cb1c67b0ebc1edfab9f18"></a>VMA_DEFRAGMENTATION_MOVE_OPERATION_COPY&#160;</td><td class="fielddoc"><p >Buffer/image has been recreated at <code>dstMemory</code> + <code>dstOffset</code>, data has been copied, old buffer/image has been destroyed. <code>srcAllocation</code> should be changed to point to the new place. This is the default value set by <a class="el" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00" title="Starts single defragmentation pass.">vmaBeginDefragmentationPass()</a>. </p> <tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="ggada9e3861caf96f08894b0bcc160ec257ad4a06ac46c4cb1c67b0ebc1edfab9f18" name="ggada9e3861caf96f08894b0bcc160ec257ad4a06ac46c4cb1c67b0ebc1edfab9f18"></a>VMA_DEFRAGMENTATION_MOVE_OPERATION_COPY&#160;</td><td class="fielddoc"><p >Buffer/image has been recreated at <code>dstMemory</code> + <code>dstOffset</code>, data has been copied, old buffer/image has been destroyed. <code>srcAllocation</code> should be changed to point to the new place. This is the default value set by <a class="el" href="group__group__alloc.html#ga980d7da2ce3b1fd5c8b8476bc362cc00" title="Starts single defragmentation pass.">vmaBeginDefragmentationPass()</a>. </p>
</td></tr> </td></tr>

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@ -151,6 +151,7 @@ Table of contents</h1>
<li><a class="el" href="vk_amd_device_coherent_memory.html">VK_AMD_device_coherent_memory</a></li> <li><a class="el" href="vk_amd_device_coherent_memory.html">VK_AMD_device_coherent_memory</a></li>
<li><a class="el" href="general_considerations.html">General considerations</a><ul> <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_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_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_allocation_algorithm">Allocation algorithm</a></li>
<li><a class="el" href="general_considerations.html#general_considerations_features_not_supported">Features not supported</a></li> <li><a class="el" href="general_considerations.html#general_considerations_features_not_supported">Features not supported</a></li>

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@ -116,15 +116,15 @@ Persistently mapped memory</h1>
<div class="line"><span class="comment">// Buffer is already mapped. You can access its memory.</span></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="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_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> <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>
<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:488</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:489</div></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:546</div></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:547</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:593</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:594</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1219</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:1220</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:1213</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:1214</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_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_allocation_info_html"><div class="ttname"><a href="struct_vma_allocation_info.html">VmaAllocationInfo</a></div><div class="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1326</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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1327</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:1368</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:1369</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> </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> <h1><a class="anchor" id="memory_mapping_cache_control"></a>
Cache flush and invalidate</h1> Cache flush and invalidate</h1>

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@ -124,16 +124,16 @@ Initialization</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocator.html">VmaAllocator</a> allocator;</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"><a class="code hl_function" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a>(&amp;allocatorCreateInfo, &amp;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_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="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:994</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:995</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:999</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:1000</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: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:1043</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:1047</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:1048</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:1002</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:1003</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. The highest version of Vulkan that the application is designed to use.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1056</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. The highest version of Vulkan that the application is designed to use.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1057</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 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 class="ttc" id="astruct_vma_vulkan_functions_html"><div class="ttname"><a href="struct_vma_vulkan_functions.html">VmaVulkanFunctions</a></div><div class="ttdoc">Pointers to some Vulkan functions - a subset used by the library.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:947</div></div> <div class="ttc" id="astruct_vma_vulkan_functions_html"><div class="ttname"><a href="struct_vma_vulkan_functions.html">VmaVulkanFunctions</a></div><div class="ttdoc">Pointers to some Vulkan functions - a subset used by the library.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:948</div></div>
<div class="ttc" id="astruct_vma_vulkan_functions_html_a3eafa102f5f8915f093f40675636b849"><div class="ttname"><a href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849">VmaVulkanFunctions::vkGetInstanceProcAddr</a></div><div class="ttdeci">PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr</div><div class="ttdoc">Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:949</div></div> <div class="ttc" id="astruct_vma_vulkan_functions_html_a3eafa102f5f8915f093f40675636b849"><div class="ttname"><a href="struct_vma_vulkan_functions.html#a3eafa102f5f8915f093f40675636b849">VmaVulkanFunctions::vkGetInstanceProcAddr</a></div><div class="ttdeci">PFN_vkGetInstanceProcAddr vkGetInstanceProcAddr</div><div class="ttdoc">Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:950</div></div>
<div class="ttc" id="astruct_vma_vulkan_functions_html_ac383ab9af127e5e136622fa4ebea9e57"><div class="ttname"><a href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57">VmaVulkanFunctions::vkGetDeviceProcAddr</a></div><div class="ttdeci">PFN_vkGetDeviceProcAddr vkGetDeviceProcAddr</div><div class="ttdoc">Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:951</div></div> <div class="ttc" id="astruct_vma_vulkan_functions_html_ac383ab9af127e5e136622fa4ebea9e57"><div class="ttname"><a href="struct_vma_vulkan_functions.html#ac383ab9af127e5e136622fa4ebea9e57">VmaVulkanFunctions::vkGetDeviceProcAddr</a></div><div class="ttdeci">PFN_vkGetDeviceProcAddr vkGetDeviceProcAddr</div><div class="ttdoc">Required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:952</div></div>
</div><!-- fragment --><h1><a class="anchor" id="quick_start_resource_allocation"></a> </div><!-- fragment --><h1><a class="anchor" id="quick_start_resource_allocation"></a>
Resource allocation</h1> Resource allocation</h1>
<p >When you want to create a buffer or image:</p> <p >When you want to create a buffer or image:</p>
@ -153,9 +153,9 @@ Resource allocation</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation.html">VmaAllocation</a> allocation;</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="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> <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>
<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:488</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:489</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1219</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:1220</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_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 objects when no longer needed:</p> </div><!-- fragment --><p >Don't forget to destroy your 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="fragment"><div class="line"><a class="code hl_function" href="group__group__alloc.html#ga0d9f4e4ba5bf9aab1f1c746387753d77">vmaDestroyBuffer</a>(allocator, buffer, allocation);</div>

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@ -140,8 +140,8 @@ $(function() {
<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_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_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="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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1229</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:1230</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_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 >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> </div><!-- fragment --><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> <p >Additional considerations:</p>

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@ -102,7 +102,7 @@ Public Attributes</h2></td></tr>
<p>Estimated amount of memory available to the program, in bytes. </p> <p>Estimated amount of memory available to the program, in bytes. </p>
<p >Fetched from system using VK_EXT_memory_budget extension if enabled.</p> <p >Fetched from system using VK_EXT_memory_budget extension if enabled.</p>
<p >It might be different (most probably smaller) than <code>VkMemoryHeap::size[heapIndex]</code> due to factors external to the program, like other programs also consuming system resources. Difference <code>budget - usage</code> is the amount of additional memory that can probably be allocated without problems. Exceeding the budget may result in various problems. </p> <p >It might be different (most probably smaller) than <code>VkMemoryHeap::size[heapIndex]</code> due to factors external to the program, decided by the operating system. Difference <code>budget - usage</code> is the amount of additional memory that can probably be allocated without problems. Exceeding the budget may result in various problems. </p>
</div> </div>
</div> </div>

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docs/html/usage_patterns.html
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@ -91,18 +91,20 @@ GPU-only resource</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_allocation_create_info.html">VmaAllocationCreateInfo</a> allocCreateInfo = {};</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#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#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</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#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a>;</div>
<div class="line">allocCreateInfo.<a class="code hl_variable" href="struct_vma_allocation_create_info.html#a983d39e1a2e63649d78a960aa2fdd0f7">priority</a> = 1.0f;</div>
<div class="line"> </div> <div class="line"> </div>
<div class="line">VkImage img;</div> <div class="line">VkImage img;</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.html">VmaAllocation</a> alloc;</div>
<div class="line"><a class="code hl_function" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a>(allocator, &amp;imgCreateInfo, &amp;allocCreateInfo, &amp;img, &amp;alloc, <span class="keyword">nullptr</span>);</div> <div class="line"><a class="code hl_function" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a>(allocator, &amp;imgCreateInfo, &amp;allocCreateInfo, &amp;img, &amp;alloc, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="agroup__group__alloc_html_ga02a94f25679275851a53e82eacbcfc73"><div class="ttname"><a href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a></div><div class="ttdeci">VkResult vmaCreateImage(VmaAllocator allocator, const VkImageCreateInfo *pImageCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkImage *pImage, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Function similar to vmaCreateBuffer().</div></div> <div class="ttc" id="agroup__group__alloc_html_ga02a94f25679275851a53e82eacbcfc73"><div class="ttname"><a href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73">vmaCreateImage</a></div><div class="ttdeci">VkResult vmaCreateImage(VmaAllocator allocator, const VkImageCreateInfo *pImageCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkImage *pImage, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)</div><div class="ttdoc">Function similar to vmaCreateBuffer().</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:488</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:489</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</div><div class="ttdoc">Set this flag if the allocation should have its own memory block.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:524</div></div> <div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a3fc311d855c2ff53f1090ef5c722b38f">VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT</div><div class="ttdoc">Set this flag if the allocation should have its own memory block.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:525</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1211</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="ttdef"><b>Definition:</b> vk_mem_alloc.h:1212</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:1219</div></div> <div class="ttc" id="astruct_vma_allocation_create_info_html_a983d39e1a2e63649d78a960aa2fdd0f7"><div class="ttname"><a href="struct_vma_allocation_create_info.html#a983d39e1a2e63649d78a960aa2fdd0f7">VmaAllocationCreateInfo::priority</a></div><div class="ttdeci">float priority</div><div class="ttdoc">A floating-point value between 0 and 1, indicating the priority of the allocation relative to other m...</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1258</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:1213</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:1220</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:1214</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_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 ><b>Also consider:</b> Consider creating them as dedicated allocations 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>, especially if they are large or if you plan to destroy and recreate them with different sizes e.g. when display resolution changes. Prefer to create such resources first and all other GPU resources (like textures and vertex buffers) later.</p> </div><!-- fragment --><p ><b>Also consider:</b> Consider creating them as dedicated allocations 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>, especially if they are large or if you plan to destroy and recreate them with different sizes e.g. when display resolution changes. Prefer to create such resources first and all other GPU resources (like textures and vertex buffers) later. When VK_EXT_memory_priority extension is enabled, it is also worth setting high priority to such allocation to decrease chances to be evicted to system memory by the operating system.</p>
<h1><a class="anchor" id="usage_patterns_staging_copy_upload"></a> <h1><a class="anchor" id="usage_patterns_staging_copy_upload"></a>
Staging copy for upload</h1> Staging copy for upload</h1>
<p ><b>When:</b> A "staging" buffer than you want to map and fill from CPU code, then use as a source od transfer to some GPU resource.</p> <p ><b>When:</b> A "staging" buffer than you want to map and fill from CPU code, then use as a source od transfer to some GPU resource.</p>
@ -125,10 +127,10 @@ Staging copy for upload</h1>
<div class="line"> </div> <div class="line"> </div>
<div class="line">memcpy(allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>, myData, myDataSize);</div> <div class="line">memcpy(allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>, myData, myDataSize);</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> <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>
<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:546</div></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:547</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:593</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:594</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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1326</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="ttdoc">Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1327</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:1368</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:1369</div></div>
</div><!-- fragment --><p ><b>Also consider:</b> You can map the allocation using <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> or you can create it as persistenly mapped using <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>, as in the example above.</p> </div><!-- fragment --><p ><b>Also consider:</b> You can map the allocation using <a class="el" href="group__group__alloc.html#gad5bd1243512d099706de88168992f069" title="Maps memory represented by given allocation and returns pointer to it.">vmaMapMemory()</a> or you can create it as persistenly mapped using <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>, as in the example above.</p>
<h1><a class="anchor" id="usage_patterns_readback"></a> <h1><a class="anchor" id="usage_patterns_readback"></a>
Readback</h1> Readback</h1>
@ -151,7 +153,7 @@ Readback</h1>
<div class="line">...</div> <div class="line">...</div>
<div class="line"> </div> <div class="line"> </div>
<div class="line">const <span class="keywordtype">float</span>* downloadedData = (<span class="keyword">const</span> <span class="keywordtype">float</span>*)allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>;</div> <div class="line">const <span class="keywordtype">float</span>* downloadedData = (<span class="keyword">const</span> <span class="keywordtype">float</span>*)allocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>;</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:605</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:606</div></div>
</div><!-- fragment --><h1><a class="anchor" id="usage_patterns_advanced_data_uploading"></a> </div><!-- fragment --><h1><a class="anchor" id="usage_patterns_advanced_data_uploading"></a>
Advanced data uploading</h1> Advanced data uploading</h1>
<p >For resources that you frequently write on CPU via mapped pointer and freqnently read on GPU e.g. as a uniform buffer (also called "dynamic"), multiple options are possible:</p> <p >For resources that you frequently write on CPU via mapped pointer and freqnently read on GPU e.g. as a uniform buffer (also called "dynamic"), multiple options are possible:</p>
@ -213,6 +215,7 @@ Advanced data uploading</h1>
<div class="line"> </div> <div class="line"> </div>
<div class="line"> <span class="comment">// [Executed in runtime]:</span></div> <div class="line"> <span class="comment">// [Executed in runtime]:</span></div>
<div class="line"> memcpy(stagingAllocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>, myData, myDataSize);</div> <div class="line"> memcpy(stagingAllocInfo.<a class="code hl_variable" href="struct_vma_allocation_info.html#a5eeffbe2d2f30f53370ff14aefbadbe2">pMappedData</a>, myData, myDataSize);</div>
<div class="line"> <span class="comment">//vkCmdPipelineBarrier: VK_ACCESS_HOST_WRITE_BIT --&gt; VK_ACCESS_TRANSFER_READ_BIT</span></div>
<div class="line"> VkBufferCopy bufCopy = {</div> <div class="line"> VkBufferCopy bufCopy = {</div>
<div class="line"> 0, <span class="comment">// srcOffset</span></div> <div class="line"> 0, <span class="comment">// srcOffset</span></div>
<div class="line"> 0, <span class="comment">// dstOffset,</span></div> <div class="line"> 0, <span class="comment">// dstOffset,</span></div>
@ -220,7 +223,7 @@ Advanced data uploading</h1>
<div class="line"> vkCmdCopyBuffer(cmdBuf, stagingBuf, buf, 1, &amp;bufCopy);</div> <div class="line"> vkCmdCopyBuffer(cmdBuf, stagingBuf, buf, 1, &amp;bufCopy);</div>
<div class="line">}</div> <div class="line">}</div>
<div class="ttc" id="agroup__group__alloc_html_ga571e87dd38e552249b56b1b0b982fad1"><div class="ttname"><a href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1">vmaGetAllocationMemoryProperties</a></div><div class="ttdeci">void vmaGetAllocationMemoryProperties(VmaAllocator allocator, VmaAllocation allocation, VkMemoryPropertyFlags *pFlags)</div><div class="ttdoc">Given an allocation, returns Property Flags of its memory type.</div></div> <div class="ttc" id="agroup__group__alloc_html_ga571e87dd38e552249b56b1b0b982fad1"><div class="ttname"><a href="group__group__alloc.html#ga571e87dd38e552249b56b1b0b982fad1">vmaGetAllocationMemoryProperties</a></div><div class="ttdeci">void vmaGetAllocationMemoryProperties(VmaAllocator allocator, VmaAllocation allocation, VkMemoryPropertyFlags *pFlags)</div><div class="ttdoc">Given an allocation, returns Property Flags of its memory type.</div></div>
<div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad">VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:617</div></div> <div class="ttc" id="agroup__group__alloc_html_ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad"><div class="ttname"><a href="group__group__alloc.html#ggad9889c10c798b040d59c92f257cae597a11337f96eacf34c1016c339eac165cad">VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:618</div></div>
</div><!-- fragment --><h1><a class="anchor" id="usage_patterns_other_use_cases"></a> </div><!-- fragment --><h1><a class="anchor" id="usage_patterns_other_use_cases"></a>
Other use cases</h1> Other use cases</h1>
<p >Here are some other, less obvious use cases and their recommended settings:</p> <p >Here are some other, less obvious use cases and their recommended settings:</p>

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@ -84,8 +84,8 @@ Creating virtual block</h1>
<div class="line"><a class="code hl_struct" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> block;</div> <div class="line"><a class="code hl_struct" href="struct_vma_virtual_block.html">VmaVirtualBlock</a> block;</div>
<div class="line">VkResult res = <a class="code hl_function" href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b">vmaCreateVirtualBlock</a>(&amp;blockCreateInfo, &amp;block);</div> <div class="line">VkResult res = <a class="code hl_function" href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b">vmaCreateVirtualBlock</a>(&amp;blockCreateInfo, &amp;block);</div>
<div class="ttc" id="agroup__group__virtual_html_gab585754076877265fdae33e5c40ef13b"><div class="ttname"><a href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b">vmaCreateVirtualBlock</a></div><div class="ttdeci">VkResult vmaCreateVirtualBlock(const VmaVirtualBlockCreateInfo *pCreateInfo, VmaVirtualBlock *pVirtualBlock)</div><div class="ttdoc">Creates new VmaVirtualBlock object.</div></div> <div class="ttc" id="agroup__group__virtual_html_gab585754076877265fdae33e5c40ef13b"><div class="ttname"><a href="group__group__virtual.html#gab585754076877265fdae33e5c40ef13b">vmaCreateVirtualBlock</a></div><div class="ttdeci">VkResult vmaCreateVirtualBlock(const VmaVirtualBlockCreateInfo *pCreateInfo, VmaVirtualBlock *pVirtualBlock)</div><div class="ttdoc">Creates new VmaVirtualBlock object.</div></div>
<div class="ttc" id="astruct_vma_virtual_block_create_info_html"><div class="ttname"><a href="struct_vma_virtual_block_create_info.html">VmaVirtualBlockCreateInfo</a></div><div class="ttdoc">Parameters of created VmaVirtualBlock object to be passed to vmaCreateVirtualBlock().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1472</div></div> <div class="ttc" id="astruct_vma_virtual_block_create_info_html"><div class="ttname"><a href="struct_vma_virtual_block_create_info.html">VmaVirtualBlockCreateInfo</a></div><div class="ttdoc">Parameters of created VmaVirtualBlock object to be passed to vmaCreateVirtualBlock().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1473</div></div>
<div class="ttc" id="astruct_vma_virtual_block_create_info_html_a670ab8c6a6e822f3c36781d79e8824e9"><div class="ttname"><a href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9">VmaVirtualBlockCreateInfo::size</a></div><div class="ttdeci">VkDeviceSize size</div><div class="ttdoc">Total size of the virtual block.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1478</div></div> <div class="ttc" id="astruct_vma_virtual_block_create_info_html_a670ab8c6a6e822f3c36781d79e8824e9"><div class="ttname"><a href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9">VmaVirtualBlockCreateInfo::size</a></div><div class="ttdeci">VkDeviceSize size</div><div class="ttdoc">Total size of the virtual block.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1479</div></div>
<div class="ttc" id="astruct_vma_virtual_block_html"><div class="ttname"><a href="struct_vma_virtual_block.html">VmaVirtualBlock</a></div><div class="ttdoc">Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...</div></div> <div class="ttc" id="astruct_vma_virtual_block_html"><div class="ttname"><a href="struct_vma_virtual_block.html">VmaVirtualBlock</a></div><div class="ttdoc">Handle to a virtual block object that allows to use core allocation algorithm without allocating any ...</div></div>
</div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_making_virtual_allocations"></a> </div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_making_virtual_allocations"></a>
Making virtual allocations</h1> Making virtual allocations</h1>
@ -111,8 +111,8 @@ Making virtual allocations</h1>
<div class="line"> <span class="comment">// Allocation failed - no space for it could be found. Handle this error!</span></div> <div class="line"> <span class="comment">// Allocation failed - no space for it could be found. Handle this error!</span></div>
<div class="line">}</div> <div class="line">}</div>
<div class="ttc" id="agroup__group__virtual_html_ga6b7cdcc1c3e5103c323fedc4e1319e01"><div class="ttname"><a href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vmaVirtualAllocate</a></div><div class="ttdeci">VkResult vmaVirtualAllocate(VmaVirtualBlock virtualBlock, const VmaVirtualAllocationCreateInfo *pCreateInfo, VmaVirtualAllocation *pAllocation, VkDeviceSize *pOffset)</div><div class="ttdoc">Allocates new virtual allocation inside given VmaVirtualBlock.</div></div> <div class="ttc" id="agroup__group__virtual_html_ga6b7cdcc1c3e5103c323fedc4e1319e01"><div class="ttname"><a href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vmaVirtualAllocate</a></div><div class="ttdeci">VkResult vmaVirtualAllocate(VmaVirtualBlock virtualBlock, const VmaVirtualAllocationCreateInfo *pCreateInfo, VmaVirtualAllocation *pAllocation, VkDeviceSize *pOffset)</div><div class="ttdoc">Allocates new virtual allocation inside given VmaVirtualBlock.</div></div>
<div class="ttc" id="astruct_vma_virtual_allocation_create_info_html"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html">VmaVirtualAllocationCreateInfo</a></div><div class="ttdoc">Parameters of created virtual allocation to be passed to vmaVirtualAllocate().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1493</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_create_info_html"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html">VmaVirtualAllocationCreateInfo</a></div><div class="ttdoc">Parameters of created virtual allocation to be passed to vmaVirtualAllocate().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1494</div></div>
<div class="ttc" id="astruct_vma_virtual_allocation_create_info_html_aae08752b86817abd0d944c6025dc603e"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html#aae08752b86817abd0d944c6025dc603e">VmaVirtualAllocationCreateInfo::size</a></div><div class="ttdeci">VkDeviceSize size</div><div class="ttdoc">Size of the allocation.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1498</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_create_info_html_aae08752b86817abd0d944c6025dc603e"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html#aae08752b86817abd0d944c6025dc603e">VmaVirtualAllocationCreateInfo::size</a></div><div class="ttdeci">VkDeviceSize size</div><div class="ttdoc">Size of the allocation.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1499</div></div>
<div class="ttc" id="astruct_vma_virtual_allocation_html"><div class="ttname"><a href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></div><div class="ttdoc">Represents single memory allocation done inside VmaVirtualBlock.</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_html"><div class="ttname"><a href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a></div><div class="ttdoc">Represents single memory allocation done inside VmaVirtualBlock.</div></div>
</div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_deallocation"></a> </div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_deallocation"></a>
Deallocation</h1> Deallocation</h1>
@ -140,8 +140,8 @@ Allocation parameters</h1>
<div class="line"> </div> <div class="line"> </div>
<div class="line"><a class="code hl_function" href="group__group__virtual.html#ga09fc688c0c3653ff23723b037e5d5033">vmaVirtualFree</a>(block, alloc);</div> <div class="line"><a class="code hl_function" href="group__group__virtual.html#ga09fc688c0c3653ff23723b037e5d5033">vmaVirtualFree</a>(block, alloc);</div>
<div class="ttc" id="agroup__group__virtual_html_ga8ee14ceb1fe033ec84d8aa29e1f75afa"><div class="ttname"><a href="group__group__virtual.html#ga8ee14ceb1fe033ec84d8aa29e1f75afa">vmaGetVirtualAllocationInfo</a></div><div class="ttdeci">void vmaGetVirtualAllocationInfo(VmaVirtualBlock virtualBlock, VmaVirtualAllocation allocation, VmaVirtualAllocationInfo *pVirtualAllocInfo)</div><div class="ttdoc">Returns information about a specific virtual allocation within a virtual block, like its size and pUs...</div></div> <div class="ttc" id="agroup__group__virtual_html_ga8ee14ceb1fe033ec84d8aa29e1f75afa"><div class="ttname"><a href="group__group__virtual.html#ga8ee14ceb1fe033ec84d8aa29e1f75afa">vmaGetVirtualAllocationInfo</a></div><div class="ttdeci">void vmaGetVirtualAllocationInfo(VmaVirtualBlock virtualBlock, VmaVirtualAllocation allocation, VmaVirtualAllocationInfo *pVirtualAllocInfo)</div><div class="ttdoc">Returns information about a specific virtual allocation within a virtual block, like its size and pUs...</div></div>
<div class="ttc" id="astruct_vma_virtual_allocation_info_html"><div class="ttname"><a href="struct_vma_virtual_allocation_info.html">VmaVirtualAllocationInfo</a></div><div class="ttdoc">Parameters of an existing virtual allocation, returned by vmaGetVirtualAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1516</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_info_html"><div class="ttname"><a href="struct_vma_virtual_allocation_info.html">VmaVirtualAllocationInfo</a></div><div class="ttdoc">Parameters of an existing virtual allocation, returned by vmaGetVirtualAllocationInfo().</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1517</div></div>
<div class="ttc" id="astruct_vma_virtual_allocation_info_html_a41d5cb09357656411653d82fee436f45"><div class="ttname"><a href="struct_vma_virtual_allocation_info.html#a41d5cb09357656411653d82fee436f45">VmaVirtualAllocationInfo::pUserData</a></div><div class="ttdeci">void * pUserData</div><div class="ttdoc">Custom pointer associated with the allocation.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1531</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_info_html_a41d5cb09357656411653d82fee436f45"><div class="ttname"><a href="struct_vma_virtual_allocation_info.html#a41d5cb09357656411653d82fee436f45">VmaVirtualAllocationInfo::pUserData</a></div><div class="ttdeci">void * pUserData</div><div class="ttdoc">Custom pointer associated with the allocation.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1532</div></div>
</div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_alignment_and_units"></a> </div><!-- fragment --><h1><a class="anchor" id="virtual_allocator_alignment_and_units"></a>
Alignment and units</h1> Alignment and units</h1>
<p >It feels natural to express sizes and offsets in bytes. If an offset of an allocation needs to be aligned to a multiply of some number (e.g. 4 bytes), you can fill optional member <a class="el" href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821" title="Required alignment of the allocation. Optional.">VmaVirtualAllocationCreateInfo::alignment</a> to request it. Example:</p> <p >It feels natural to express sizes and offsets in bytes. If an offset of an allocation needs to be aligned to a multiply of some number (e.g. 4 bytes), you can fill optional member <a class="el" href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821" title="Required alignment of the allocation. Optional.">VmaVirtualAllocationCreateInfo::alignment</a> to request it. Example:</p>
@ -151,7 +151,7 @@ Alignment and units</h1>
<div class="line"> </div> <div class="line"> </div>
<div class="line"><a class="code hl_struct" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> alloc;</div> <div class="line"><a class="code hl_struct" href="struct_vma_virtual_allocation.html">VmaVirtualAllocation</a> alloc;</div>
<div class="line">res = <a class="code hl_function" href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vmaVirtualAllocate</a>(block, &amp;allocCreateInfo, &amp;alloc, <span class="keyword">nullptr</span>);</div> <div class="line">res = <a class="code hl_function" href="group__group__virtual.html#ga6b7cdcc1c3e5103c323fedc4e1319e01">vmaVirtualAllocate</a>(block, &amp;allocCreateInfo, &amp;alloc, <span class="keyword">nullptr</span>);</div>
<div class="ttc" id="astruct_vma_virtual_allocation_create_info_html_a9d19709872fc1904a105079e1c885821"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821">VmaVirtualAllocationCreateInfo::alignment</a></div><div class="ttdeci">VkDeviceSize alignment</div><div class="ttdoc">Required alignment of the allocation. Optional.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1503</div></div> <div class="ttc" id="astruct_vma_virtual_allocation_create_info_html_a9d19709872fc1904a105079e1c885821"><div class="ttname"><a href="struct_vma_virtual_allocation_create_info.html#a9d19709872fc1904a105079e1c885821">VmaVirtualAllocationCreateInfo::alignment</a></div><div class="ttdeci">VkDeviceSize alignment</div><div class="ttdoc">Required alignment of the allocation. Optional.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1504</div></div>
</div><!-- fragment --><p >Alignments of different allocations made from one block may vary. However, if all alignments and sizes are always multiply of some size e.g. 4 B or <code>sizeof(MyDataStruct)</code>, you can express all sizes, alignments, and offsets in multiples of that size instead of individual bytes. It might be more convenient, but you need to make sure to use this new unit consistently in all the places:</p> </div><!-- fragment --><p >Alignments of different allocations made from one block may vary. However, if all alignments and sizes are always multiply of some size e.g. 4 B or <code>sizeof(MyDataStruct)</code>, you can express all sizes, alignments, and offsets in multiples of that size instead of individual bytes. It might be more convenient, but you need to make sure to use this new unit consistently in all the places:</p>
<ul> <ul>
<li><a class="el" href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9" title="Total size of the virtual block.">VmaVirtualBlockCreateInfo::size</a></li> <li><a class="el" href="struct_vma_virtual_block_create_info.html#a670ab8c6a6e822f3c36781d79e8824e9" title="Total size of the virtual block.">VmaVirtualBlockCreateInfo::size</a></li>
@ -166,9 +166,9 @@ Statistics</h1>
<div class="line">printf(<span class="stringliteral">&quot;My virtual block has %llu bytes used by %u virtual allocations\n&quot;</span>,</div> <div class="line">printf(<span class="stringliteral">&quot;My virtual block has %llu bytes used by %u virtual allocations\n&quot;</span>,</div>
<div class="line"> stats.<a class="code hl_variable" href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">allocationBytes</a>, stats.<a class="code hl_variable" href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">allocationCount</a>);</div> <div class="line"> stats.<a class="code hl_variable" href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">allocationBytes</a>, stats.<a class="code hl_variable" href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">allocationCount</a>);</div>
<div class="ttc" id="agroup__group__virtual_html_ga2902aa3130866afcc64bb5f984113db3"><div class="ttname"><a href="group__group__virtual.html#ga2902aa3130866afcc64bb5f984113db3">vmaGetVirtualBlockStatistics</a></div><div class="ttdeci">void vmaGetVirtualBlockStatistics(VmaVirtualBlock virtualBlock, VmaStatistics *pStats)</div><div class="ttdoc">Calculates and returns statistics about virtual allocations and memory usage in given VmaVirtualBlock...</div></div> <div class="ttc" id="agroup__group__virtual_html_ga2902aa3130866afcc64bb5f984113db3"><div class="ttname"><a href="group__group__virtual.html#ga2902aa3130866afcc64bb5f984113db3">vmaGetVirtualBlockStatistics</a></div><div class="ttdeci">void vmaGetVirtualBlockStatistics(VmaVirtualBlock virtualBlock, VmaStatistics *pStats)</div><div class="ttdoc">Calculates and returns statistics about virtual allocations and memory usage in given VmaVirtualBlock...</div></div>
<div class="ttc" id="astruct_vma_statistics_html"><div class="ttname"><a href="struct_vma_statistics.html">VmaStatistics</a></div><div class="ttdoc">Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1104</div></div> <div class="ttc" id="astruct_vma_statistics_html"><div class="ttname"><a href="struct_vma_statistics.html">VmaStatistics</a></div><div class="ttdoc">Calculated statistics of memory usage e.g. in a specific memory type, heap, custom pool,...</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1105</div></div>
<div class="ttc" id="astruct_vma_statistics_html_a21db06eba3422f87a2b4b4703d879c16"><div class="ttname"><a href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">VmaStatistics::allocationBytes</a></div><div class="ttdeci">VkDeviceSize allocationBytes</div><div class="ttdoc">Total number of bytes occupied by all VmaAllocation objects.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1126</div></div> <div class="ttc" id="astruct_vma_statistics_html_a21db06eba3422f87a2b4b4703d879c16"><div class="ttname"><a href="struct_vma_statistics.html#a21db06eba3422f87a2b4b4703d879c16">VmaStatistics::allocationBytes</a></div><div class="ttdeci">VkDeviceSize allocationBytes</div><div class="ttdoc">Total number of bytes occupied by all VmaAllocation objects.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1127</div></div>
<div class="ttc" id="astruct_vma_statistics_html_ab0ff76e50f58f9f54b6f265e5bf5dde2"><div class="ttname"><a href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">VmaStatistics::allocationCount</a></div><div class="ttdeci">uint32_t allocationCount</div><div class="ttdoc">Number of VmaAllocation objects allocated.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1112</div></div> <div class="ttc" id="astruct_vma_statistics_html_ab0ff76e50f58f9f54b6f265e5bf5dde2"><div class="ttname"><a href="struct_vma_statistics.html#ab0ff76e50f58f9f54b6f265e5bf5dde2">VmaStatistics::allocationCount</a></div><div class="ttdeci">uint32_t allocationCount</div><div class="ttdoc">Number of VmaAllocation objects allocated.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:1113</div></div>
</div><!-- fragment --><p >You can also request a full list of allocations and free regions as a string in JSON format by calling <a class="el" href="group__group__stats.html#ga52d810e1222c592e5d80556ad005f1e6" title="Builds and returns a null-terminated string in JSON format with information about given VmaVirtualBlo...">vmaBuildVirtualBlockStatsString()</a>. Returned string must be later freed using <a class="el" href="group__group__stats.html#ga47fb8d8aa69df4a7c23a9719b4080623" title="Frees a string returned by vmaBuildVirtualBlockStatsString().">vmaFreeVirtualBlockStatsString()</a>. The format of this string differs from the one returned by the main Vulkan allocator, but it is similar.</p> </div><!-- fragment --><p >You can also request a full list of allocations and free regions as a string in JSON format by calling <a class="el" href="group__group__stats.html#ga52d810e1222c592e5d80556ad005f1e6" title="Builds and returns a null-terminated string in JSON format with information about given VmaVirtualBlo...">vmaBuildVirtualBlockStatsString()</a>. Returned string must be later freed using <a class="el" href="group__group__stats.html#ga47fb8d8aa69df4a7c23a9719b4080623" title="Frees a string returned by vmaBuildVirtualBlockStatsString().">vmaFreeVirtualBlockStatsString()</a>. The format of this string differs from the one returned by the main Vulkan allocator, but it is similar.</p>
<h1><a class="anchor" id="virtual_allocator_additional_considerations"></a> <h1><a class="anchor" id="virtual_allocator_additional_considerations"></a>
Additional considerations</h1> Additional considerations</h1>

4
docs/html/vk__mem__alloc_8h.html
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@ -173,7 +173,7 @@ Typedefs</h2></td></tr>
<tr class="memitem:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga88a77cef37e5d3c4fc9eb328885d048d">VmaDefragmentationFlags</a></td></tr> <tr class="memitem:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memItemLeft" align="right" valign="top">typedef VkFlags&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga88a77cef37e5d3c4fc9eb328885d048d">VmaDefragmentationFlags</a></td></tr>
<tr class="separator:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:ga88a77cef37e5d3c4fc9eb328885d048d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">VmaDefragmentationMoveOperation</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">VmaDefragmentationMoveOperation</a></td></tr> <tr class="memitem:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">VmaDefragmentationMoveOperation</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">VmaDefragmentationMoveOperation</a></td></tr>
<tr class="memdesc:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. <a href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">More...</a><br /></td></tr> <tr class="memdesc:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. <a href="group__group__alloc.html#ga2ea666deeb3c2c74806a097e27cdb4a1">More...</a><br /></td></tr>
<tr class="separator:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:ga2ea666deeb3c2c74806a097e27cdb4a1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga0860ba1c0a67178fae4aecb63a78573e"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__virtual.html#ga0860ba1c0a67178fae4aecb63a78573e">VmaVirtualBlockCreateFlagBits</a></td></tr> <tr class="memitem:ga0860ba1c0a67178fae4aecb63a78573e"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__virtual.html#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>. <a href="group__group__virtual.html#ga0860ba1c0a67178fae4aecb63a78573e">More...</a><br /></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>. <a href="group__group__virtual.html#ga0860ba1c0a67178fae4aecb63a78573e">More...</a><br /></td></tr>
@ -333,7 +333,7 @@ Enumerations</h2></td></tr>
, <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a> = 1 , <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257ad25bc6f816b226b4fd5170e845f218d2">VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE</a> = 1
, <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257a9786f8492a9be2c03bd26395e352ab85">VMA_DEFRAGMENTATION_MOVE_OPERATION_DESTROY</a> = 2 , <a class="el" href="group__group__alloc.html#ggada9e3861caf96f08894b0bcc160ec257a9786f8492a9be2c03bd26395e352ab85">VMA_DEFRAGMENTATION_MOVE_OPERATION_DESTROY</a> = 2
}</td></tr> }</td></tr>
<tr class="memdesc:gada9e3861caf96f08894b0bcc160ec257"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. <a href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">More...</a><br /></td></tr> <tr class="memdesc:gada9e3861caf96f08894b0bcc160ec257"><td class="mdescLeft">&#160;</td><td class="mdescRight">Operation performed on single defragmentation move. See structure <a class="el" href="struct_vma_defragmentation_move.html" title="Single move of an allocation to be done for defragmentation.">VmaDefragmentationMove</a>. <a href="group__group__alloc.html#gada9e3861caf96f08894b0bcc160ec257">More...</a><br /></td></tr>
<tr class="separator:gada9e3861caf96f08894b0bcc160ec257"><td class="memSeparator" colspan="2">&#160;</td></tr> <tr class="separator:gada9e3861caf96f08894b0bcc160ec257"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga88bcf8c1cd3bb1610ff7343811c65bca"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a> { <a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96">VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT</a> = 0x00000001 <tr class="memitem:ga88bcf8c1cd3bb1610ff7343811c65bca"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__group__virtual.html#ga88bcf8c1cd3bb1610ff7343811c65bca">VmaVirtualBlockCreateFlagBits</a> { <a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaae6423e2fa2f3c9211b21c819e3f10f96">VMA_VIRTUAL_BLOCK_CREATE_LINEAR_ALGORITHM_BIT</a> = 0x00000001
, <a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844">VMA_VIRTUAL_BLOCK_CREATE_ALGORITHM_MASK</a> , <a class="el" href="group__group__virtual.html#gga88bcf8c1cd3bb1610ff7343811c65bcaaf9487467136e1a9e371894dc3a7c4844">VMA_VIRTUAL_BLOCK_CREATE_ALGORITHM_MASK</a>

2
docs/html/vk_khr_dedicated_allocation.html
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@ -83,7 +83,7 @@ $(function() {
<div class="line"> </div> <div class="line"> </div>
<div class="line"><a class="code hl_function" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a>(&amp;allocatorInfo, &amp;allocator);</div> <div class="line"><a class="code hl_function" href="group__group__init.html#ga200692051ddb34240248234f5f4c17bb">vmaCreateAllocator</a>(&amp;allocatorInfo, &amp;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_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_gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878"><div class="ttname"><a href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878">VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</div><div class="ttdoc">Enables usage of VK_KHR_dedicated_allocation extension.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:342</div></div> <div class="ttc" id="agroup__group__init_html_gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878"><div class="ttname"><a href="group__group__init.html#gga4f87c9100d154a65a4ad495f7763cf7cace7da7cc6e71a625dfa763c55a597878">VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</a></div><div class="ttdeci">@ VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT</div><div class="ttdoc">Enables usage of VK_KHR_dedicated_allocation extension.</div><div class="ttdef"><b>Definition:</b> vk_mem_alloc.h:343</div></div>
</div><!-- fragment --><p >That is all. The extension will be automatically used whenever you create a buffer using <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer()</a> or image using <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>.</p> </div><!-- fragment --><p >That is all. The extension will be automatically used whenever you create a buffer using <a class="el" href="group__group__alloc.html#gac72ee55598617e8eecca384e746bab51">vmaCreateBuffer()</a> or image using <a class="el" href="group__group__alloc.html#ga02a94f25679275851a53e82eacbcfc73" title="Function similar to vmaCreateBuffer().">vmaCreateImage()</a>.</p>
<p >When using the extension together with Vulkan Validation Layer, you will receive warnings like this:</p> <p >When using the extension together with Vulkan Validation Layer, you will receive warnings like this:</p>
<p ><em>vkBindBufferMemory(): Binding memory to buffer 0x33 but vkGetBufferMemoryRequirements() has not been called on that buffer.</em></p> <p ><em>vkBindBufferMemory(): Binding memory to buffer 0x33 but vkGetBufferMemoryRequirements() has not been called on that buffer.</em></p>

40
include/vk_mem_alloc.h
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@ -89,6 +89,7 @@ License: MIT
- \subpage vk_amd_device_coherent_memory - \subpage vk_amd_device_coherent_memory
- \subpage general_considerations - \subpage general_considerations
- [Thread safety](@ref general_considerations_thread_safety) - [Thread safety](@ref general_considerations_thread_safety)
- [Versioning and compatibility](@ref general_considerations_versioning_and_compatibility)
- [Validation layer warnings](@ref general_considerations_validation_layer_warnings) - [Validation layer warnings](@ref general_considerations_validation_layer_warnings)
- [Allocation algorithm](@ref general_considerations_allocation_algorithm) - [Allocation algorithm](@ref general_considerations_allocation_algorithm)
- [Features not supported](@ref general_considerations_features_not_supported) - [Features not supported](@ref general_considerations_features_not_supported)
@ -587,7 +588,7 @@ typedef enum VmaAllocationCreateFlagBits
never read or accessed randomly, so a memory type can be selected that is uncached and write-combined. never read or accessed randomly, so a memory type can be selected that is uncached and write-combined.
\warning Violating this declaration may work correctly, but will likely be very slow. \warning Violating this declaration may work correctly, but will likely be very slow.
Watch out for implicit reads introduces by doing e.g. `pMappedData[i] += x;` Watch out for implicit reads introduced by doing e.g. `pMappedData[i] += x;`
Better prepare your data in a local variable and `memcpy()` it to the mapped pointer all at once. Better prepare your data in a local variable and `memcpy()` it to the mapped pointer all at once.
*/ */
VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT = 0x00000400, VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT = 0x00000400,
@ -724,7 +725,7 @@ typedef enum VmaDefragmentationFlagBits
} VmaDefragmentationFlagBits; } VmaDefragmentationFlagBits;
typedef VkFlags VmaDefragmentationFlags; typedef VkFlags VmaDefragmentationFlags;
/// Operation performed on single defragmentation move. /// Operation performed on single defragmentation move. See structure #VmaDefragmentationMove.
typedef enum VmaDefragmentationMoveOperation typedef enum VmaDefragmentationMoveOperation
{ {
/// Buffer/image has been recreated at `dstMemory` + `dstOffset`, data has been copied, old buffer/image has been destroyed. `srcAllocation` should be changed to point to the new place. This is the default value set by vmaBeginDefragmentationPass(). /// Buffer/image has been recreated at `dstMemory` + `dstOffset`, data has been copied, old buffer/image has been destroyed. `srcAllocation` should be changed to point to the new place. This is the default value set by vmaBeginDefragmentationPass().
@ -1193,7 +1194,7 @@ typedef struct VmaBudget
Fetched from system using VK_EXT_memory_budget extension if enabled. Fetched from system using VK_EXT_memory_budget extension if enabled.
It might be different (most probably smaller) than `VkMemoryHeap::size[heapIndex]` due to factors It might be different (most probably smaller) than `VkMemoryHeap::size[heapIndex]` due to factors
external to the program, like other programs also consuming system resources. external to the program, decided by the operating system.
Difference `budget - usage` is the amount of additional memory that can probably Difference `budget - usage` is the amount of additional memory that can probably
be allocated without problems. Exceeding the budget may result in various problems. be allocated without problems. Exceeding the budget may result in various problems.
*/ */
@ -17945,6 +17946,8 @@ you can achieve behavior of a ring buffer / queue.
Ring buffer is available only in pools with one memory block - Ring buffer is available only in pools with one memory block -
VmaPoolCreateInfo::maxBlockCount must be 1. Otherwise behavior is undefined. VmaPoolCreateInfo::maxBlockCount must be 1. Otherwise behavior is undefined.
\note \ref defragmentation is not supported in custom pools created with #VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT.
\page defragmentation Defragmentation \page defragmentation Defragmentation
@ -18007,7 +18010,7 @@ Unlike in previous iterations of the defragmentation API, there is no list of "m
Defragmentation algorithm tries to move all suitable allocations. Defragmentation algorithm tries to move all suitable allocations.
You can, however, refuse to move some of them inside a defragmentation pass, by setting You can, however, refuse to move some of them inside a defragmentation pass, by setting
`pass.pMoves[i].operation` to #VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE. `pass.pMoves[i].operation` to #VMA_DEFRAGMENTATION_MOVE_OPERATION_IGNORE.
However, this is not recommended and may result in suboptimal packing of the allocations after defragmentation. 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. If you cannot ensure any allocation can be moved, it is better to keep movable allocations separate in a custom pool.
You can also decide to destroy an allocation instead of moving it. You can also decide to destroy an allocation instead of moving it.
@ -18021,6 +18024,8 @@ It is also safe to perform the defragmentation asynchronously to render frames a
usage, possibly from multiple threads, with the exception that allocations usage, possibly from multiple threads, with the exception that allocations
returned in VmaDefragmentationPassMoveInfo::pMoves shouldn't be destroyed until the defragmentation pass is ended. returned in VmaDefragmentationPassMoveInfo::pMoves shouldn't be destroyed until the defragmentation pass is ended.
\note Defragmentation is not supported in custom pools created with #VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT.
\page statistics Statistics \page statistics Statistics
@ -18503,6 +18508,7 @@ imgCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
VmaAllocationCreateInfo allocCreateInfo = {}; VmaAllocationCreateInfo allocCreateInfo = {};
allocCreateInfo.usage = VMA_MEMORY_USAGE_AUTO; allocCreateInfo.usage = VMA_MEMORY_USAGE_AUTO;
allocCreateInfo.flags = VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT; allocCreateInfo.flags = VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT;
allocCreateInfo.priority = 1.0f;
VkImage img; VkImage img;
VmaAllocation alloc; VmaAllocation alloc;
@ -18514,7 +18520,8 @@ Consider creating them as dedicated allocations using #VMA_ALLOCATION_CREATE_DED
especially if they are large or if you plan to destroy and recreate them with different sizes especially if they are large or if you plan to destroy and recreate them with different sizes
e.g. when display resolution changes. e.g. when display resolution changes.
Prefer to create such resources first and all other GPU resources (like textures and vertex buffers) later. Prefer to create such resources first and all other GPU resources (like textures and vertex buffers) later.
When VK_EXT_memory_priority extension is enabled, it is also worth setting high priority to such allocation
to decrease chances to be evicted to system memory by the operating system.
\section usage_patterns_staging_copy_upload Staging copy for upload \section usage_patterns_staging_copy_upload Staging copy for upload
@ -18665,6 +18672,7 @@ else
// [Executed in runtime]: // [Executed in runtime]:
memcpy(stagingAllocInfo.pMappedData, myData, myDataSize); memcpy(stagingAllocInfo.pMappedData, myData, myDataSize);
//vkCmdPipelineBarrier: VK_ACCESS_HOST_WRITE_BIT --> VK_ACCESS_TRANSFER_READ_BIT
VkBufferCopy bufCopy = { VkBufferCopy bufCopy = {
0, // srcOffset 0, // srcOffset
0, // dstOffset, 0, // dstOffset,
@ -18951,6 +18959,28 @@ accompanying this library.
functions. functions.
- #VmaVirtualBlock is not safe to be used from multiple threads simultaneously. - #VmaVirtualBlock is not safe to be used from multiple threads simultaneously.
\section general_considerations_versioning_and_compatibility Versioning and compatibility
The library uses [**Semantic Versioning**](https://semver.org/),
which means version numbers follow convention: Major.Minor.Patch (e.g. 2.3.0), where:
- 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.
- 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.
- Incrementing Major version means a release could break some backward compatibility.
All changes between official releases are documented in file "CHANGELOG.md".
\warning Backward compatiblity 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.
\section general_considerations_validation_layer_warnings Validation layer warnings \section general_considerations_validation_layer_warnings Validation layer warnings
When using this library, you can meet following types of warnings issued by When using this library, you can meet following types of warnings issued by