CHANGELOG.md

3.1.0 (TBD)

This release gathers fixes and improvements made during many months of continuous development on the main branch, mostly based on issues and pull requests on GitHub.

Additions to the library API:

• Added convenience functions vmaCopyMemoryToAllocation, vmaCopyAllocationToMemory.
• Added functions vmaCreateAliasingBuffer2, vmaCreateAliasingImage2 that offer creating a buffer/image in an existing allocation with additional allocationLocalOffset.
• Added function vmaGetAllocationInfo2, structure VmaAllocationInfo2 that return additional information about an allocation, useful for interop with other APIs (#383, #340).
• Added callback VmaDefragmentationInfo::pfnBreakCallback that allows breaking long execution of vmaBeginDefragmentation. Also added PFN_vmaCheckDefragmentationBreakFunction, VmaDefragmentationInfo::pBreakCallbackUserData.
• Added support for VK_KHR_maintenance4 extension - VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE4_BIT flag (#397).
• Added support for VK_KHR_maintenance5 extension - VMA_ALLOCATOR_CREATE_KHR_MAINTENANCE5_BIT flag (#411).

Other changes:

• Changes in debug and configuration macros:
  • Split macros into separate VMA_DEBUG_LOG and VMA_DEBUG_LOG_FORMAT (#297).
  • Added macros VMA_ASSERT_LEAK, VMA_LEAK_LOG_FORMAT separate from normal VMA_ASSERT, VMA_DEBUG_LOG_FORMAT (#379, #385).
  • Added macro VMA_EXTENDS_VK_STRUCT (#347).
• Countless bug fixes and improvements in the code and documentation, mostly to improve compatibility with various compilers and GPUs, including:
  • Fixed missing #include that resulted in compilation error about snprintf not declared on some compilers (#312).
  • Fixed main memory type selection algorithm for GPUs that have no HOST_CACHED memory type, like Raspberry Pi (#362).
• Major changes in Cmake script.
• Fixes in GpuMemDumpVis.py script.

3.0.1 (2022-05-26)

• Fixes in defragmentation algorithm.
• Fixes in GpuMemDumpVis.py regarding image height calculation.
• Other bug fixes, optimizations, and improvements in the code and documentation.

3.0.0 (2022-03-25)

It has been a long time since the previous official release, so hopefully everyone has been using the latest code from "master" branch, which is always maintained in a good state, not the old version. For completeness, here is the list of changes since v2.3.0. The major version number has changed, so there are some compatibility-breaking changes, but the basic API stays the same and is mostly backward-compatible.

Major features added (some compatibility-breaking):

• Added new API for selecting preferred memory type: flags VMA_MEMORY_USAGE_AUTO, VMA_MEMORY_USAGE_AUTO_PREFER_DEVICE, VMA_MEMORY_USAGE_AUTO_PREFER_HOST, VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT, VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT, VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT. Old values like VMA_MEMORY_USAGE_GPU_ONLY still work as before, for backward compatibility, but are not recommended.
• Added new defragmentation API and algorithm, replacing the old one. See structure VmaDefragmentationInfo, VmaDefragmentationMove, VmaDefragmentationPassMoveInfo, VmaDefragmentationStats, function vmaBeginDefragmentation, vmaEndDefragmentation, vmaBeginDefragmentationPass, vmaEndDefragmentationPass.
• Redesigned API for statistics, replacing the old one. See structures: VmaStatistics, VmaDetailedStatistics, VmaTotalStatistics. VmaBudget, functions: vmaGetHeapBudgets, vmaCalculateStatistics, vmaGetPoolStatistics, vmaCalculatePoolStatistics, vmaGetVirtualBlockStatistics, vmaCalculateVirtualBlockStatistics.
• Added "Virtual allocator" feature - possibility to use core allocation algorithms for allocation of custom memory, not necessarily Vulkan device memory. See functions like vmaCreateVirtualBlock, vmaDestroyVirtualBlock and many more.
• VmaAllocation now keeps both void* pUserData and char* pName. Added function vmaSetAllocationName, member VmaAllocationInfo::pName. Flag VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT is now deprecated.
• Clarified and cleaned up various ways of importing Vulkan functions. See macros VMA_STATIC_VULKAN_FUNCTIONS, VMA_DYNAMIC_VULKAN_FUNCTIONS, structure VmaVulkanFunctions. Added members VmaVulkanFunctions::vkGetInstanceProcAddr, vkGetDeviceProcAddr, which are now required when using VMA_DYNAMIC_VULKAN_FUNCTIONS.

Removed (compatibility-breaking):

• Removed whole "lost allocations" feature. Removed from the interface: VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT, VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT, vmaCreateLostAllocation, vmaMakePoolAllocationsLost, vmaTouchAllocation, VmaAllocatorCreateInfo::frameInUseCount, VmaPoolCreateInfo::frameInUseCount.
• Removed whole "record & replay" feature. Removed from the API: VmaAllocatorCreateInfo::pRecordSettings, VmaRecordSettings, VmaRecordFlagBits, VmaRecordFlags. Removed VmaReplay application.
• Removed "buddy" algorithm - removed flag VMA_POOL_CREATE_BUDDY_ALGORITHM_BIT.

Minor but compatibility-breaking changes:

• Changes in ALLOCATION_CREATE_STRATEGY flags. Removed flags: VMA_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT, VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT, VMA_VIRTUAL_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT, which were aliases to other existing flags.
• Added a member void* pUserData to VmaDeviceMemoryCallbacks. Updated PFN_vmaAllocateDeviceMemoryFunction, PFN_vmaFreeDeviceMemoryFunction to use the new pUserData member.
• Removed function vmaResizeAllocation that was already deprecated.

Other major changes:

• Added new features to custom pools: support for dedicated allocations, new member VmaPoolCreateInfo::pMemoryAllocateNext, minAllocationAlignment.
• Added support for Vulkan 1.2, 1.3.
• Added support for VK_KHR_buffer_device_address extension - flag VMA_ALLOCATOR_CREATE_BUFFER_DEVICE_ADDRESS_BIT.
• Added support for VK_EXT_memory_priority extension - flag VMA_ALLOCATOR_CREATE_EXT_MEMORY_PRIORITY_BIT, members VmaAllocationCreateInfo::priority, VmaPoolCreateInfo::priority.
• Added support for VK_AMD_device_coherent_memory extension - flag VMA_ALLOCATOR_CREATE_AMD_DEVICE_COHERENT_MEMORY_BIT.
• Added member VmaAllocatorCreateInfo::pTypeExternalMemoryHandleTypes.
• Added function vmaGetAllocatorInfo, structure VmaAllocatorInfo.
• Added functions vmaFlushAllocations, vmaInvalidateAllocations for multiple allocations at once.
• Added flag VMA_ALLOCATION_CREATE_CAN_ALIAS_BIT.
• Added function vmaCreateBufferWithAlignment.
• Added convenience function vmaGetAllocationMemoryProperties.
• Added convenience functions: vmaCreateAliasingBuffer, vmaCreateAliasingImage.

Other minor changes:

• Implemented Two-Level Segregated Fit (TLSF) allocation algorithm, replacing previous default one. It is much faster, especially when freeing many allocations at once or when bufferImageGranularity is large.
• Renamed debug macro VMA_DEBUG_ALIGNMENT to VMA_MIN_ALIGNMENT.
• Added CMake support - CMakeLists.txt files. Removed Premake support.
• Changed vmaInvalidateAllocation and vmaFlushAllocation to return VkResult.
• Added nullability annotations for Clang: VMA_NULLABLE, VMA_NOT_NULL, VMA_NULLABLE_NON_DISPATCHABLE, VMA_NOT_NULL_NON_DISPATCHABLE, VMA_LEN_IF_NOT_NULL.
• JSON dump format has changed.
• Countless fixes and improvements, including performance optimizations, compatibility with various platforms and compilers, documentation.

2.3.0 (2019-12-04)

Major release after a year of development in "master" branch and feature branches. Notable new features: supporting Vulkan 1.1, supporting query for memory budget.

Major changes:

• Added support for Vulkan 1.1.
  • Added member VmaAllocatorCreateInfo::vulkanApiVersion.
  • When Vulkan 1.1 is used, there is no need to enable VK_KHR_dedicated_allocation or VK_KHR_bind_memory2 extensions, as they are promoted to Vulkan itself.
• Added support for query for memory budget and staying within the budget.
  • Added function vmaGetBudget, structure VmaBudget. This can also serve as simple statistics, more efficient than vmaCalculateStats.
  • By default the budget it is estimated based on memory heap sizes. It may be queried from the system using VK_EXT_memory_budget extension if you use VMA_ALLOCATOR_CREATE_EXT_MEMORY_BUDGET_BIT flag and VmaAllocatorCreateInfo::instance member.
  • Added flag VMA_ALLOCATION_CREATE_WITHIN_BUDGET_BIT that fails an allocation if it would exceed the budget.
• Added new memory usage options:
  • VMA_MEMORY_USAGE_CPU_COPY for memory that is preferably not DEVICE_LOCAL but not guaranteed to be HOST_VISIBLE.
  • VMA_MEMORY_USAGE_GPU_LAZILY_ALLOCATED for memory that is LAZILY_ALLOCATED.
• Added support for VK_KHR_bind_memory2 extension:
  • Added VMA_ALLOCATION_CREATE_DONT_BIND_BIT flag that lets you create both buffer/image and allocation, but don't bind them together.
  • Added flag VMA_ALLOCATOR_CREATE_KHR_BIND_MEMORY2_BIT, functions vmaBindBufferMemory2, vmaBindImageMemory2 that let you specify additional local offset and pNext pointer while binding.
• Added functions vmaSetPoolName, vmaGetPoolName that let you assign string names to custom pools. JSON dump file format and VmaDumpVis tool is updated to show these names.
• Defragmentation is legal only on buffers and images in VK_IMAGE_TILING_LINEAR. This is due to the way it is currently implemented in the library and the restrictions of the Vulkan specification. Clarified documentation in this regard. See discussion in #59.

Minor changes:

• Made vmaResizeAllocation function deprecated, always returning failure.
• Made changes in the internal algorithm for the choice of memory type. Be careful! You may now get a type that is not HOST_VISIBLE or HOST_COHERENT if it's not stated as always ensured by some VMA_MEMORY_USAGE_* flag.
• Extended VmaReplay application with more detailed statistics printed at the end.
• Added macros VMA_CALL_PRE, VMA_CALL_POST that let you decorate declarations of all library functions if you want to e.g. export/import them as dynamically linked library.
• Optimized VmaAllocation objects to be allocated out of an internal free-list allocator. This makes allocation and deallocation causing 0 dynamic CPU heap allocations on average.
• Updated recording CSV file format version to 1.8, to support new functions.
• Many additions and fixes in documentation. Many compatibility fixes for various compilers and platforms. Other internal bugfixes, optimizations, updates, refactoring...

2.2.0 (2018-12-13)

Major release after many months of development in "master" branch and feature branches. Notable new features: defragmentation of GPU memory, buddy algorithm, convenience functions for sparse binding.

Major changes:

• New, more powerful defragmentation:
  • Added structure VmaDefragmentationInfo2, functions vmaDefragmentationBegin, vmaDefragmentationEnd.
  • Added support for defragmentation of GPU memory.
  • Defragmentation of CPU memory now uses memmove, so it can move data to overlapping regions.
  • Defragmentation of CPU memory is now available for memory types that are HOST_VISIBLE but not HOST_COHERENT.
  • Added structure member VmaVulkanFunctions::vkCmdCopyBuffer.
  • Major internal changes in defragmentation algorithm.
  • VmaReplay: added parameters: --DefragmentAfterLine, --DefragmentationFlags.
  • Old interface (structure VmaDefragmentationInfo, function vmaDefragment) is now deprecated.
• Added buddy algorithm, available for custom pools - flag VMA_POOL_CREATE_BUDDY_ALGORITHM_BIT.
• Added convenience functions for multiple allocations and deallocations at once, intended for sparse binding resources - functions vmaAllocateMemoryPages, vmaFreeMemoryPages.
• Added function that tries to resize existing allocation in place: vmaResizeAllocation.
• Added flags for allocation strategy: VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT, VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT, VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT, and their aliases: VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT, VMA_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT, VMA_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT.

Minor changes:

• Changed behavior of allocation functions to return VK_ERROR_VALIDATION_FAILED_EXT when trying to allocate memory of size 0, create buffer with size 0, or image with one of the dimensions 0.
• VmaReplay: Added support for Windows end of lines.
• Updated recording CSV file format version to 1.5, to support new functions.
• Internal optimization: using read-write mutex on some platforms.
• Many additions and fixes in documentation. Many compatibility fixes for various compilers. Other internal bugfixes, optimizations, refactoring, added more internal validation...

2.1.0 (2018-09-10)

Minor bugfixes.

2.1.0-beta.1 (2018-08-27)

Major release after many months of development in "development" branch and features branches. Many new features added, some bugs fixed. API stays backward-compatible.

Major changes:

• Added linear allocation algorithm, accessible for custom pools, that can be used as free-at-once, stack, double stack, or ring buffer. See "Linear allocation algorithm" documentation chapter.
  • Added VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT, VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT.
• Added feature to record sequence of calls to the library to a file and replay it using dedicated application. See documentation chapter "Record and replay".
  • Recording: added VmaAllocatorCreateInfo::pRecordSettings.
  • Replaying: added VmaReplay project.
  • Recording file format: added document "docs/Recording file format.md".
• Improved support for non-coherent memory.
  • Added functions: vmaFlushAllocation, vmaInvalidateAllocation.
  • nonCoherentAtomSize is now respected automatically.
  • Added VmaVulkanFunctions::vkFlushMappedMemoryRanges, vkInvalidateMappedMemoryRanges.
• Improved debug features related to detecting incorrect mapped memory usage. See documentation chapter "Debugging incorrect memory usage".
  • Added debug macro VMA_DEBUG_DETECT_CORRUPTION, functions vmaCheckCorruption, vmaCheckPoolCorruption.
  • Added debug macro VMA_DEBUG_INITIALIZE_ALLOCATIONS to initialize contents of allocations with a bit pattern.
  • Changed behavior of VMA_DEBUG_MARGIN macro - it now adds margin also before first and after last allocation in a block.
• Changed format of JSON dump returned by vmaBuildStatsString (not backward compatible!).
  • Custom pools and memory blocks now have IDs that don't change after sorting.
  • Added properties: "CreationFrameIndex", "LastUseFrameIndex", "Usage".
  • Changed VmaDumpVis tool to use these new properties for better coloring.
  • Changed behavior of vmaGetAllocationInfo and vmaTouchAllocation to update allocation.lastUseFrameIndex even if allocation cannot become lost.

Minor changes:

• Changes in custom pools:
  • Added new structure member VmaPoolStats::blockCount.
  • Changed behavior of VmaPoolCreateInfo::blockSize = 0 (default) - it now means that pool may use variable block sizes, just like default pools do.
• Improved logic of vmaFindMemoryTypeIndex for some cases, especially integrated GPUs.
• VulkanSample application: Removed dependency on external library MathFu. Added own vector and matrix structures.
• Changes that improve compatibility with various platforms, including: Visual Studio 2012, 32-bit code, C compilers.
  • Changed usage of "VK_KHR_dedicated_allocation" extension in the code to be optional, driven by macro VMA_DEDICATED_ALLOCATION, for compatibility with Android.
• Many additions and fixes in documentation, including description of new features, as well as "Validation layer warnings".
• Other bugfixes.

2.0.0 (2018-03-19)

A major release with many compatibility-breaking changes.

Notable new features:

• Introduction of VmaAllocation handle that you must retrieve from allocation functions and pass to deallocation functions next to normal VkBuffer and VkImage.
• Introduction of VmaAllocationInfo structure that you can retrieve from VmaAllocation handle to access parameters of the allocation (like VkDeviceMemory and offset) instead of retrieving them directly from allocation functions.
• Support for reference-counted mapping and persistently mapped allocations - see vmaMapMemory, VMA_ALLOCATION_CREATE_MAPPED_BIT.
• Support for custom memory pools - see VmaPool handle, VmaPoolCreateInfo structure, vmaCreatePool function.
• Support for defragmentation (compaction) of allocations - see function vmaDefragment and related structures.
• Support for "lost allocations" - see appropriate chapter on documentation Main Page.

1.0.1 (2017-07-04)

• Fixes for Linux GCC compilation.
• Changed "CONFIGURATION SECTION" to contain #ifndef so you can define these macros before including this header, not necessarily change them in the file.

1.0.0 (2017-06-16)

First public release.