#include <vulkan/vulkan.h>

Classes
struct	VmaDeviceMemoryCallbacks
	Set of callbacks that the library will call for `vkAllocateMemory` and `vkFreeMemory`. More...

struct	VmaVulkanFunctions
	Pointers to some Vulkan functions - a subset used by the library. More...

struct	VmaRecordSettings
	Parameters for recording calls to VMA functions. To be used in VmaAllocatorCreateInfo::pRecordSettings. More...

struct	VmaAllocatorCreateInfo
	Description of a Allocator to be created. More...

struct	VmaStatInfo
	Calculated statistics of memory usage in entire allocator. More...

struct	VmaStats
	General statistics from current state of Allocator. More...

struct	VmaAllocationCreateInfo

struct	VmaPoolCreateInfo
	Describes parameter of created VmaPool. More...

struct	VmaPoolStats
	Describes parameter of existing VmaPool. More...

struct	VmaAllocationInfo
	Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo(). More...

struct	VmaDefragmentationInfo2
	Parameters for defragmentation. More...

struct	VmaDefragmentationInfo
	Deprecated. Optional configuration parameters to be passed to function vmaDefragment(). More...

struct	VmaDefragmentationStats
	Statistics returned by function vmaDefragment(). More...

Macros
#define	VMA_RECORDING_ENABLED 0

#define	NOMINMAX

#define	VMA_DEDICATED_ALLOCATION 0

#define	VMA_STATS_STRING_ENABLED 1

Typedefs
typedef void(VKAPI_PTR *	PFN_vmaAllocateDeviceMemoryFunction) (VmaAllocator allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size)
	Callback function called after successful vkAllocateMemory. More...

typedef void(VKAPI_PTR *	PFN_vmaFreeDeviceMemoryFunction) (VmaAllocator allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size)
	Callback function called before vkFreeMemory. More...

typedef struct VmaDeviceMemoryCallbacks	VmaDeviceMemoryCallbacks
	Set of callbacks that the library will call for `vkAllocateMemory` and `vkFreeMemory`. More...

typedef enum VmaAllocatorCreateFlagBits	VmaAllocatorCreateFlagBits
	Flags for created VmaAllocator. More...

typedef VkFlags	VmaAllocatorCreateFlags

typedef struct VmaVulkanFunctions	VmaVulkanFunctions
	Pointers to some Vulkan functions - a subset used by the library. More...

typedef enum VmaRecordFlagBits	VmaRecordFlagBits
	Flags to be used in VmaRecordSettings::flags. More...

typedef VkFlags	VmaRecordFlags

typedef struct VmaRecordSettings	VmaRecordSettings
	Parameters for recording calls to VMA functions. To be used in VmaAllocatorCreateInfo::pRecordSettings. More...

typedef struct VmaAllocatorCreateInfo	VmaAllocatorCreateInfo
	Description of a Allocator to be created. More...

typedef struct VmaStatInfo	VmaStatInfo
	Calculated statistics of memory usage in entire allocator. More...

typedef struct VmaStats	VmaStats
	General statistics from current state of Allocator. More...

typedef enum VmaMemoryUsage	VmaMemoryUsage

typedef enum VmaAllocationCreateFlagBits	VmaAllocationCreateFlagBits
	Flags to be passed as VmaAllocationCreateInfo::flags. More...

typedef VkFlags	VmaAllocationCreateFlags

typedef struct VmaAllocationCreateInfo	VmaAllocationCreateInfo

typedef enum VmaPoolCreateFlagBits	VmaPoolCreateFlagBits
	Flags to be passed as VmaPoolCreateInfo::flags. More...

typedef VkFlags	VmaPoolCreateFlags

typedef struct VmaPoolCreateInfo	VmaPoolCreateInfo
	Describes parameter of created VmaPool. More...

typedef struct VmaPoolStats	VmaPoolStats
	Describes parameter of existing VmaPool. More...

typedef struct VmaAllocationInfo	VmaAllocationInfo
	Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo(). More...

typedef enum VmaDefragmentationFlagBits	VmaDefragmentationFlagBits
	Flags to be used in vmaDefragmentationBegin(). None at the moment. Reserved for future use. More...

typedef VkFlags	VmaDefragmentationFlags

typedef struct VmaDefragmentationInfo2	VmaDefragmentationInfo2
	Parameters for defragmentation. More...

typedef struct VmaDefragmentationInfo	VmaDefragmentationInfo
	Deprecated. Optional configuration parameters to be passed to function vmaDefragment(). More...

typedef struct VmaDefragmentationStats	VmaDefragmentationStats
	Statistics returned by function vmaDefragment(). More...

Enumerations
enum	VmaAllocatorCreateFlagBits { VMA_ALLOCATOR_CREATE_EXTERNALLY_SYNCHRONIZED_BIT = 0x00000001, VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT = 0x00000002, VMA_ALLOCATOR_CREATE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF }
	Flags for created VmaAllocator. More...

enum	VmaRecordFlagBits { VMA_RECORD_FLUSH_AFTER_CALL_BIT = 0x00000001, VMA_RECORD_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF }
	Flags to be used in VmaRecordSettings::flags. More...

enum	VmaMemoryUsage { VMA_MEMORY_USAGE_UNKNOWN = 0, VMA_MEMORY_USAGE_GPU_ONLY = 1, VMA_MEMORY_USAGE_CPU_ONLY = 2, VMA_MEMORY_USAGE_CPU_TO_GPU = 3, VMA_MEMORY_USAGE_GPU_TO_CPU = 4, VMA_MEMORY_USAGE_MAX_ENUM = 0x7FFFFFFF }

enum	VmaAllocationCreateFlagBits { VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT = 0x00000001, VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT = 0x00000002, VMA_ALLOCATION_CREATE_MAPPED_BIT = 0x00000004, VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT = 0x00000008, VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT = 0x00000010, VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT = 0x00000020, VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT = 0x00000040, VMA_ALLOCATION_CREATE_DONT_BIND_BIT = 0x00000080, VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT = 0x00010000, VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT = 0x00020000, VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT = 0x00040000, VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT = VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT, VMA_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT = VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT, VMA_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT = VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT, VMA_ALLOCATION_CREATE_STRATEGY_MASK, VMA_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF }
	Flags to be passed as VmaAllocationCreateInfo::flags. More...

enum	VmaPoolCreateFlagBits { VMA_POOL_CREATE_IGNORE_BUFFER_IMAGE_GRANULARITY_BIT = 0x00000002, VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT = 0x00000004, VMA_POOL_CREATE_BUDDY_ALGORITHM_BIT = 0x00000008, VMA_POOL_CREATE_ALGORITHM_MASK, VMA_POOL_CREATE_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF }
	Flags to be passed as VmaPoolCreateInfo::flags. More...

enum	VmaDefragmentationFlagBits { VMA_DEFRAGMENTATION_FLAG_BITS_MAX_ENUM = 0x7FFFFFFF }
	Flags to be used in vmaDefragmentationBegin(). None at the moment. Reserved for future use. More...

Functions
VkResult	vmaCreateAllocator (const VmaAllocatorCreateInfo pCreateInfo, VmaAllocator pAllocator)
	Creates Allocator object. More...

void	vmaDestroyAllocator (VmaAllocator allocator)
	Destroys allocator object. More...

void	vmaGetPhysicalDeviceProperties (VmaAllocator allocator, const VkPhysicalDeviceProperties **ppPhysicalDeviceProperties)

void	vmaGetMemoryProperties (VmaAllocator allocator, const VkPhysicalDeviceMemoryProperties **ppPhysicalDeviceMemoryProperties)

void	vmaGetMemoryTypeProperties (VmaAllocator allocator, uint32_t memoryTypeIndex, VkMemoryPropertyFlags *pFlags)
	Given Memory Type Index, returns Property Flags of this memory type. More...

void	vmaSetCurrentFrameIndex (VmaAllocator allocator, uint32_t frameIndex)
	Sets index of the current frame. More...

void	vmaCalculateStats (VmaAllocator allocator, VmaStats *pStats)
	Retrieves statistics from current state of the Allocator. More...

void	vmaBuildStatsString (VmaAllocator allocator, char **ppStatsString, VkBool32 detailedMap)
	Builds and returns statistics as string in JSON format. More...

void	vmaFreeStatsString (VmaAllocator allocator, char *pStatsString)

VkResult	vmaFindMemoryTypeIndex (VmaAllocator allocator, uint32_t memoryTypeBits, const VmaAllocationCreateInfo pAllocationCreateInfo, uint32_t pMemoryTypeIndex)
	Helps to find memoryTypeIndex, given memoryTypeBits and VmaAllocationCreateInfo. More...

VkResult	vmaFindMemoryTypeIndexForBufferInfo (VmaAllocator allocator, const VkBufferCreateInfo pBufferCreateInfo, const VmaAllocationCreateInfo pAllocationCreateInfo, uint32_t *pMemoryTypeIndex)
	Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo. More...

VkResult	vmaFindMemoryTypeIndexForImageInfo (VmaAllocator allocator, const VkImageCreateInfo pImageCreateInfo, const VmaAllocationCreateInfo pAllocationCreateInfo, uint32_t *pMemoryTypeIndex)
	Helps to find memoryTypeIndex, given VkImageCreateInfo and VmaAllocationCreateInfo. More...

VkResult	vmaCreatePool (VmaAllocator allocator, const VmaPoolCreateInfo pCreateInfo, VmaPool pPool)
	Allocates Vulkan device memory and creates VmaPool object. More...

void	vmaDestroyPool (VmaAllocator allocator, VmaPool pool)
	Destroys VmaPool object and frees Vulkan device memory. More...

void	vmaGetPoolStats (VmaAllocator allocator, VmaPool pool, VmaPoolStats *pPoolStats)
	Retrieves statistics of existing VmaPool object. More...

void	vmaMakePoolAllocationsLost (VmaAllocator allocator, VmaPool pool, size_t *pLostAllocationCount)
	Marks all allocations in given pool as lost if they are not used in current frame or VmaPoolCreateInfo::frameInUseCount back from now. More...

VkResult	vmaCheckPoolCorruption (VmaAllocator allocator, VmaPool pool)
	Checks magic number in margins around all allocations in given memory pool in search for corruptions. More...

VkResult	vmaAllocateMemory (VmaAllocator allocator, const VkMemoryRequirements pVkMemoryRequirements, const VmaAllocationCreateInfo pCreateInfo, VmaAllocation pAllocation, VmaAllocationInfo pAllocationInfo)
	General purpose memory allocation. More...

VkResult	vmaAllocateMemoryPages (VmaAllocator allocator, const VkMemoryRequirements pVkMemoryRequirements, const VmaAllocationCreateInfo pCreateInfo, size_t allocationCount, VmaAllocation pAllocations, VmaAllocationInfo pAllocationInfo)
	General purpose memory allocation for multiple allocation objects at once. More...

VkResult	vmaAllocateMemoryForBuffer (VmaAllocator allocator, VkBuffer buffer, const VmaAllocationCreateInfo pCreateInfo, VmaAllocation pAllocation, VmaAllocationInfo *pAllocationInfo)

VkResult	vmaAllocateMemoryForImage (VmaAllocator allocator, VkImage image, const VmaAllocationCreateInfo pCreateInfo, VmaAllocation pAllocation, VmaAllocationInfo *pAllocationInfo)
	Function similar to vmaAllocateMemoryForBuffer(). More...

void	vmaFreeMemory (VmaAllocator allocator, VmaAllocation allocation)
	Frees memory previously allocated using vmaAllocateMemory(), vmaAllocateMemoryForBuffer(), or vmaAllocateMemoryForImage(). More...

void	vmaFreeMemoryPages (VmaAllocator allocator, size_t allocationCount, VmaAllocation *pAllocations)
	Frees memory and destroys multiple allocations. More...

VkResult	vmaResizeAllocation (VmaAllocator allocator, VmaAllocation allocation, VkDeviceSize newSize)
	Tries to resize an allocation in place, if there is enough free memory after it. More...

void	vmaGetAllocationInfo (VmaAllocator allocator, VmaAllocation allocation, VmaAllocationInfo *pAllocationInfo)
	Returns current information about specified allocation and atomically marks it as used in current frame. More...

VkBool32	vmaTouchAllocation (VmaAllocator allocator, VmaAllocation allocation)
	Returns `VK_TRUE` if allocation is not lost and atomically marks it as used in current frame. More...

void	vmaSetAllocationUserData (VmaAllocator allocator, VmaAllocation allocation, void *pUserData)
	Sets pUserData in given allocation to new value. More...

void	vmaCreateLostAllocation (VmaAllocator allocator, VmaAllocation *pAllocation)
	Creates new allocation that is in lost state from the beginning. More...

VkResult	vmaMapMemory (VmaAllocator allocator, VmaAllocation allocation, void **ppData)
	Maps memory represented by given allocation and returns pointer to it. More...

void	vmaUnmapMemory (VmaAllocator allocator, VmaAllocation allocation)
	Unmaps memory represented by given allocation, mapped previously using vmaMapMemory(). More...

void	vmaFlushAllocation (VmaAllocator allocator, VmaAllocation allocation, VkDeviceSize offset, VkDeviceSize size)
	Flushes memory of given allocation. More...

void	vmaInvalidateAllocation (VmaAllocator allocator, VmaAllocation allocation, VkDeviceSize offset, VkDeviceSize size)
	Invalidates memory of given allocation. More...

VkResult	vmaCheckCorruption (VmaAllocator allocator, uint32_t memoryTypeBits)
	Checks magic number in margins around all allocations in given memory types (in both default and custom pools) in search for corruptions. More...

VkResult	vmaDefragmentationBegin (VmaAllocator allocator, const VmaDefragmentationInfo2 pInfo, VmaDefragmentationStats pStats, VmaDefragmentationContext *pContext)
	Begins defragmentation process. More...

VkResult	vmaDefragmentationEnd (VmaAllocator allocator, VmaDefragmentationContext context)
	Ends defragmentation process. More...

VkResult	vmaDefragment (VmaAllocator allocator, VmaAllocation pAllocations, size_t allocationCount, VkBool32 pAllocationsChanged, const VmaDefragmentationInfo pDefragmentationInfo, VmaDefragmentationStats pDefragmentationStats)
	Deprecated. Compacts memory by moving allocations. More...

VkResult	vmaBindBufferMemory (VmaAllocator allocator, VmaAllocation allocation, VkBuffer buffer)
	Binds buffer to allocation. More...

VkResult	vmaBindImageMemory (VmaAllocator allocator, VmaAllocation allocation, VkImage image)
	Binds image to allocation. More...

VkResult	vmaCreateBuffer (VmaAllocator allocator, const VkBufferCreateInfo pBufferCreateInfo, const VmaAllocationCreateInfo pAllocationCreateInfo, VkBuffer pBuffer, VmaAllocation pAllocation, VmaAllocationInfo *pAllocationInfo)

void	vmaDestroyBuffer (VmaAllocator allocator, VkBuffer buffer, VmaAllocation allocation)
	Destroys Vulkan buffer and frees allocated memory. More...

VkResult	vmaCreateImage (VmaAllocator allocator, const VkImageCreateInfo pImageCreateInfo, const VmaAllocationCreateInfo pAllocationCreateInfo, VkImage pImage, VmaAllocation pAllocation, VmaAllocationInfo *pAllocationInfo)
	Function similar to vmaCreateBuffer(). More...

void	vmaDestroyImage (VmaAllocator allocator, VkImage image, VmaAllocation allocation)
	Destroys Vulkan image and frees allocated memory. More...

Macro Definition Documentation

◆ NOMINMAX

#define NOMINMAX

◆ VMA_DEDICATED_ALLOCATION

#define VMA_DEDICATED_ALLOCATION 0

◆ VMA_RECORDING_ENABLED

#define VMA_RECORDING_ENABLED 0

◆ VMA_STATS_STRING_ENABLED

#define VMA_STATS_STRING_ENABLED 1

Typedef Documentation

◆ PFN_vmaAllocateDeviceMemoryFunction

typedef void(VKAPI_PTR * PFN_vmaAllocateDeviceMemoryFunction) (VmaAllocator allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size)

Callback function called after successful vkAllocateMemory.

◆ PFN_vmaFreeDeviceMemoryFunction

typedef void(VKAPI_PTR * PFN_vmaFreeDeviceMemoryFunction) (VmaAllocator allocator, uint32_t memoryType, VkDeviceMemory memory, VkDeviceSize size)

Callback function called before vkFreeMemory.

◆ VmaAllocationCreateFlagBits

typedef enum VmaAllocationCreateFlagBits VmaAllocationCreateFlagBits

Flags to be passed as VmaAllocationCreateInfo::flags.

◆ VmaAllocationCreateFlags

typedef VkFlags VmaAllocationCreateFlags

◆ VmaAllocationCreateInfo

typedef struct VmaAllocationCreateInfo VmaAllocationCreateInfo

◆ VmaAllocationInfo

typedef struct VmaAllocationInfo VmaAllocationInfo

Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().

◆ VmaAllocatorCreateFlagBits

typedef enum VmaAllocatorCreateFlagBits VmaAllocatorCreateFlagBits

Flags for created VmaAllocator.

◆ VmaAllocatorCreateFlags

typedef VkFlags VmaAllocatorCreateFlags

◆ VmaAllocatorCreateInfo

typedef struct VmaAllocatorCreateInfo VmaAllocatorCreateInfo

Description of a Allocator to be created.

◆ VmaDefragmentationFlagBits

typedef enum VmaDefragmentationFlagBits VmaDefragmentationFlagBits

Flags to be used in vmaDefragmentationBegin(). None at the moment. Reserved for future use.

◆ VmaDefragmentationFlags

typedef VkFlags VmaDefragmentationFlags

◆ VmaDefragmentationInfo

typedef struct VmaDefragmentationInfo VmaDefragmentationInfo

Deprecated. Optional configuration parameters to be passed to function vmaDefragment().

Deprecated:: This is a part of the old interface. It is recommended to use structure VmaDefragmentationInfo2 and function vmaDefragmentationBegin() instead.

◆ VmaDefragmentationInfo2

typedef struct VmaDefragmentationInfo2 VmaDefragmentationInfo2

Parameters for defragmentation.

To be used with function vmaDefragmentationBegin().

◆ VmaDefragmentationStats

typedef struct VmaDefragmentationStats VmaDefragmentationStats

Statistics returned by function vmaDefragment().

◆ VmaDeviceMemoryCallbacks

typedef struct VmaDeviceMemoryCallbacks VmaDeviceMemoryCallbacks

Set of callbacks that the library will call for vkAllocateMemory and vkFreeMemory.

Provided for informative purpose, e.g. to gather statistics about number of allocations or total amount of memory allocated in Vulkan.

Used in VmaAllocatorCreateInfo::pDeviceMemoryCallbacks.

◆ VmaMemoryUsage

typedef enum VmaMemoryUsage VmaMemoryUsage

◆ VmaPoolCreateFlagBits

typedef enum VmaPoolCreateFlagBits VmaPoolCreateFlagBits

Flags to be passed as VmaPoolCreateInfo::flags.

◆ VmaPoolCreateFlags

typedef VkFlags VmaPoolCreateFlags

◆ VmaPoolCreateInfo

typedef struct VmaPoolCreateInfo VmaPoolCreateInfo

Describes parameter of created VmaPool.

◆ VmaPoolStats

typedef struct VmaPoolStats VmaPoolStats

Describes parameter of existing VmaPool.

◆ VmaRecordFlagBits

typedef enum VmaRecordFlagBits VmaRecordFlagBits

Flags to be used in VmaRecordSettings::flags.

◆ VmaRecordFlags

typedef VkFlags VmaRecordFlags

◆ VmaRecordSettings

typedef struct VmaRecordSettings VmaRecordSettings

Parameters for recording calls to VMA functions. To be used in VmaAllocatorCreateInfo::pRecordSettings.

◆ VmaStatInfo

typedef struct VmaStatInfo VmaStatInfo

Calculated statistics of memory usage in entire allocator.

◆ VmaStats

typedef struct VmaStats VmaStats

General statistics from current state of Allocator.

◆ VmaVulkanFunctions

typedef struct VmaVulkanFunctions VmaVulkanFunctions

Pointers to some Vulkan functions - a subset used by the library.

Used in VmaAllocatorCreateInfo::pVulkanFunctions.

Enumeration Type Documentation

◆ VmaAllocationCreateFlagBits

enum VmaAllocationCreateFlagBits

Flags to be passed as VmaAllocationCreateInfo::flags.

Enumerator
VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT	Set this flag if the allocation should have its own memory block. Use it for special, big resources, like fullscreen images used as attachments. You should not use this flag if VmaAllocationCreateInfo::pool is not null.
VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT	Set this flag to only try to allocate from existing `VkDeviceMemory` blocks and never create new such block. If new allocation cannot be placed in any of the existing blocks, allocation fails with `VK_ERROR_OUT_OF_DEVICE_MEMORY` error. You should not use VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT and VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT at the same time. It makes no sense. If VmaAllocationCreateInfo::pool is not null, this flag is implied and ignored.
VMA_ALLOCATION_CREATE_MAPPED_BIT	Set this flag to use a memory that will be persistently mapped and retrieve pointer to it. Pointer to mapped memory will be returned through VmaAllocationInfo::pMappedData. Is it valid to use this flag for allocation made from memory type that is not `HOST_VISIBLE`. This flag is then ignored and memory is not mapped. This is useful if you need an allocation that is efficient to use on GPU (`DEVICE_LOCAL`) and still want to map it directly if possible on platforms that support it (e.g. Intel GPU). You should not use this flag together with VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT.
VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT	Allocation created with this flag can become lost as a result of another allocation with VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT flag, so you must check it before use. To check if allocation is not lost, call vmaGetAllocationInfo() and check if VmaAllocationInfo::deviceMemory is not `VK_NULL_HANDLE`. For details about supporting lost allocations, see Lost Allocations chapter of User Guide on Main Page. You should not use this flag together with VMA_ALLOCATION_CREATE_MAPPED_BIT.
VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT	While creating allocation using this flag, other allocations that were created with flag VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT can become lost. For details about supporting lost allocations, see Lost Allocations chapter of User Guide on Main Page.
VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT	Set this flag to treat VmaAllocationCreateInfo::pUserData as pointer to a null-terminated string. Instead of copying pointer value, a local copy of the string is made and stored in allocation's `pUserData`. The string is automatically freed together with the allocation. It is also used in vmaBuildStatsString().
VMA_ALLOCATION_CREATE_UPPER_ADDRESS_BIT	Allocation will be created from upper stack in a double stack pool. This flag is only allowed for custom pools created with VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT flag.
VMA_ALLOCATION_CREATE_DONT_BIND_BIT	Create both buffer/image and allocation, but don't bind them together. It is useful when you want to bind yourself to do some more advanced binding, e.g. using some extensions. The flag is meaningful only with functions that bind by default: vmaCreateBuffer(), vmaCreateImage(). Otherwise it is ignored.
VMA_ALLOCATION_CREATE_STRATEGY_BEST_FIT_BIT	Allocation strategy that chooses smallest possible free range for the allocation.
VMA_ALLOCATION_CREATE_STRATEGY_WORST_FIT_BIT	Allocation strategy that chooses biggest possible free range for the allocation.
VMA_ALLOCATION_CREATE_STRATEGY_FIRST_FIT_BIT	Allocation strategy that chooses first suitable free range for the allocation. "First" doesn't necessarily means the one with smallest offset in memory, but rather the one that is easiest and fastest to find.
VMA_ALLOCATION_CREATE_STRATEGY_MIN_MEMORY_BIT	Allocation strategy that tries to minimize memory usage.
VMA_ALLOCATION_CREATE_STRATEGY_MIN_TIME_BIT	Allocation strategy that tries to minimize allocation time.
VMA_ALLOCATION_CREATE_STRATEGY_MIN_FRAGMENTATION_BIT	Allocation strategy that tries to minimize memory fragmentation.
VMA_ALLOCATION_CREATE_STRATEGY_MASK	A bit mask to extract only `STRATEGY` bits from entire set of flags.
VMA_ALLOCATION_CREATE_FLAG_BITS_MAX_ENUM

◆ VmaAllocatorCreateFlagBits

enum VmaAllocatorCreateFlagBits

Flags for created VmaAllocator.

Enumerator

VMA_ALLOCATOR_CREATE_EXTERNALLY_SYNCHRONIZED_BIT

Allocator and all objects created from it will not be synchronized internally, so you must guarantee they are used from only one thread at a time or synchronized externally by you.

Using this flag may increase performance because internal mutexes are not used.

VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT

Enables usage of VK_KHR_dedicated_allocation extension.

Using this extenion will automatically allocate dedicated blocks of memory for some buffers and images instead of suballocating place for them out of bigger memory blocks (as if you explicitly used VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT flag) when it is recommended by the driver. It may improve performance on some GPUs.

You may set this flag only if you found out that following device extensions are supported, you enabled them while creating Vulkan device passed as VmaAllocatorCreateInfo::device, and you want them to be used internally by this library:

VK_KHR_get_memory_requirements2
VK_KHR_dedicated_allocation

When this flag is set, you can experience following warnings reported by Vulkan validation layer. You can ignore them.

vkBindBufferMemory(): Binding memory to buffer 0x2d but vkGetBufferMemoryRequirements() has not been called on that buffer.

VMA_ALLOCATOR_CREATE_FLAG_BITS_MAX_ENUM

◆ VmaDefragmentationFlagBits

enum VmaDefragmentationFlagBits

Flags to be used in vmaDefragmentationBegin(). None at the moment. Reserved for future use.

Enumerator
VMA_DEFRAGMENTATION_FLAG_BITS_MAX_ENUM

◆ VmaMemoryUsage

enum VmaMemoryUsage

Enumerator
VMA_MEMORY_USAGE_UNKNOWN	No intended memory usage specified. Use other members of VmaAllocationCreateInfo to specify your requirements.
VMA_MEMORY_USAGE_GPU_ONLY	Memory will be used on device only, so fast access from the device is preferred. It usually means device-local GPU (video) memory. No need to be mappable on host. It is roughly equivalent of `D3D12_HEAP_TYPE_DEFAULT`. Usage: Resources written and read by device, e.g. images used as attachments. Resources transferred from host once (immutable) or infrequently and read by device multiple times, e.g. textures to be sampled, vertex buffers, uniform (constant) buffers, and majority of other types of resources used on GPU. Allocation may still end up in `HOST_VISIBLE` memory on some implementations. In such case, you are free to map it. You can use VMA_ALLOCATION_CREATE_MAPPED_BIT with this usage type.
VMA_MEMORY_USAGE_CPU_ONLY	Memory will be mappable on host. It usually means CPU (system) memory. Guarantees to be `HOST_VISIBLE` and `HOST_COHERENT`. CPU access is typically uncached. Writes may be write-combined. Resources created in this pool may still be accessible to the device, but access to them can be slow. It is roughly equivalent of `D3D12_HEAP_TYPE_UPLOAD`. Usage: Staging copy of resources used as transfer source.
VMA_MEMORY_USAGE_CPU_TO_GPU	Memory that is both mappable on host (guarantees to be `HOST_VISIBLE`) and preferably fast to access by GPU. CPU access is typically uncached. Writes may be write-combined. Usage: Resources written frequently by host (dynamic), read by device. E.g. textures, vertex buffers, uniform buffers updated every frame or every draw call.
VMA_MEMORY_USAGE_GPU_TO_CPU	Memory mappable on host (guarantees to be `HOST_VISIBLE`) and cached. It is roughly equivalent of `D3D12_HEAP_TYPE_READBACK`. Usage: Resources written by device, read by host - results of some computations, e.g. screen capture, average scene luminance for HDR tone mapping. Any resources read or accessed randomly on host, e.g. CPU-side copy of vertex buffer used as source of transfer, but also used for collision detection.
VMA_MEMORY_USAGE_MAX_ENUM

◆ VmaPoolCreateFlagBits

enum VmaPoolCreateFlagBits

Flags to be passed as VmaPoolCreateInfo::flags.

Enumerator
VMA_POOL_CREATE_IGNORE_BUFFER_IMAGE_GRANULARITY_BIT	Use this flag if you always allocate only buffers and linear images or only optimal images out of this pool and so Buffer-Image Granularity can be ignored. This is an optional optimization flag. If you always allocate using vmaCreateBuffer(), vmaCreateImage(), vmaAllocateMemoryForBuffer(), then you don't need to use it because allocator knows exact type of your allocations so it can handle Buffer-Image Granularity in the optimal way. If you also allocate using vmaAllocateMemoryForImage() or vmaAllocateMemory(), exact type of such allocations is not known, so allocator must be conservative in handling Buffer-Image Granularity, which can lead to suboptimal allocation (wasted memory). In that case, if you can make sure you always allocate only buffers and linear images or only optimal images out of this pool, use this flag to make allocator disregard Buffer-Image Granularity and so make allocations faster and more optimal.
VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT	Enables alternative, linear allocation algorithm in this pool. Specify this flag to enable linear allocation algorithm, which always creates new allocations after last one and doesn't reuse space from allocations freed in between. It trades memory consumption for simplified algorithm and data structure, which has better performance and uses less memory for metadata. By using this flag, you can achieve behavior of free-at-once, stack, ring buffer, and double stack. For details, see documentation chapter Linear allocation algorithm. When using this flag, you must specify VmaPoolCreateInfo::maxBlockCount == 1 (or 0 for default). For more details, see Linear allocation algorithm.
VMA_POOL_CREATE_BUDDY_ALGORITHM_BIT	Enables alternative, buddy allocation algorithm in this pool. It operates on a tree of blocks, each having size that is a power of two and a half of its parent's size. Comparing to default algorithm, this one provides faster allocation and deallocation and decreased external fragmentation, at the expense of more memory wasted (internal fragmentation). For more details, see Buddy allocation algorithm.
VMA_POOL_CREATE_ALGORITHM_MASK	Bit mask to extract only `ALGORITHM` bits from entire set of flags.
VMA_POOL_CREATE_FLAG_BITS_MAX_ENUM

◆ VmaRecordFlagBits

enum VmaRecordFlagBits

Flags to be used in VmaRecordSettings::flags.

Enumerator

VMA_RECORD_FLUSH_AFTER_CALL_BIT

Enables flush after recording every function call.

Enable it if you expect your application to crash, which may leave recording file truncated. It may degrade performance though.

VMA_RECORD_FLAG_BITS_MAX_ENUM

Function Documentation

◆ vmaAllocateMemory()

VkResult vmaAllocateMemory	(	VmaAllocator	allocator,
		const VkMemoryRequirements *	pVkMemoryRequirements,
		const VmaAllocationCreateInfo *	pCreateInfo,
		VmaAllocation *	pAllocation,
		VmaAllocationInfo *	pAllocationInfo
	)

General purpose memory allocation.

Parameters

[out]	pAllocation	Handle to allocated memory.
[out]	pAllocationInfo	Optional. Information about allocated memory. It can be later fetched using function vmaGetAllocationInfo().

You should free the memory using vmaFreeMemory() or vmaFreeMemoryPages().

It is recommended to use vmaAllocateMemoryForBuffer(), vmaAllocateMemoryForImage(), vmaCreateBuffer(), vmaCreateImage() instead whenever possible.

◆ vmaAllocateMemoryForBuffer()

VkResult vmaAllocateMemoryForBuffer	(	VmaAllocator	allocator,
		VkBuffer	buffer,
		const VmaAllocationCreateInfo *	pCreateInfo,
		VmaAllocation *	pAllocation,
		VmaAllocationInfo *	pAllocationInfo
	)

Parameters

[out]	pAllocation	Handle to allocated memory.
[out]	pAllocationInfo	Optional. Information about allocated memory. It can be later fetched using function vmaGetAllocationInfo().

You should free the memory using vmaFreeMemory().

◆ vmaAllocateMemoryForImage()

VkResult vmaAllocateMemoryForImage	(	VmaAllocator	allocator,
		VkImage	image,
		const VmaAllocationCreateInfo *	pCreateInfo,
		VmaAllocation *	pAllocation,
		VmaAllocationInfo *	pAllocationInfo
	)

Function similar to vmaAllocateMemoryForBuffer().

◆ vmaAllocateMemoryPages()

VkResult vmaAllocateMemoryPages	(	VmaAllocator	allocator,
		const VkMemoryRequirements *	pVkMemoryRequirements,
		const VmaAllocationCreateInfo *	pCreateInfo,
		size_t	allocationCount,
		VmaAllocation *	pAllocations,
		VmaAllocationInfo *	pAllocationInfo
	)

General purpose memory allocation for multiple allocation objects at once.

Parameters

	allocator	Allocator object.
	pVkMemoryRequirements	Memory requirements for each allocation.
	pCreateInfo	Creation parameters for each alloction.
	allocationCount	Number of allocations to make.
[out]	pAllocations	Pointer to array that will be filled with handles to created allocations.
[out]	pAllocationInfo	Optional. Pointer to array that will be filled with parameters of created allocations.

You should free the memory using vmaFreeMemory() or vmaFreeMemoryPages().

Word "pages" is just a suggestion to use this function to allocate pieces of memory needed for sparse binding. It is just a general purpose allocation function able to make multiple allocations at once. It may be internally optimized to be more efficient than calling vmaAllocateMemory() allocationCount times.

All allocations are made using same parameters. All of them are created out of the same memory pool and type. If any allocation fails, all allocations already made within this function call are also freed, so that when returned result is not VK_SUCCESS, pAllocation array is always entirely filled with VK_NULL_HANDLE.

◆ vmaBindBufferMemory()

VkResult vmaBindBufferMemory	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VkBuffer	buffer
	)

Binds buffer to allocation.

Binds specified buffer to region of memory represented by specified allocation. Gets VkDeviceMemory handle and offset from the allocation. If you want to create a buffer, allocate memory for it and bind them together separately, you should use this function for binding instead of standard vkBindBufferMemory(), because it ensures proper synchronization so that when a VkDeviceMemory object is used by multiple allocations, calls to vkBind*Memory() or vkMapMemory() won't happen from multiple threads simultaneously (which is illegal in Vulkan).

It is recommended to use function vmaCreateBuffer() instead of this one.

◆ vmaBindImageMemory()

VkResult vmaBindImageMemory	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VkImage	image
	)

Binds image to allocation.

Binds specified image to region of memory represented by specified allocation. Gets VkDeviceMemory handle and offset from the allocation. If you want to create an image, allocate memory for it and bind them together separately, you should use this function for binding instead of standard vkBindImageMemory(), because it ensures proper synchronization so that when a VkDeviceMemory object is used by multiple allocations, calls to vkBind*Memory() or vkMapMemory() won't happen from multiple threads simultaneously (which is illegal in Vulkan).

It is recommended to use function vmaCreateImage() instead of this one.

◆ vmaBuildStatsString()

void vmaBuildStatsString	(	VmaAllocator	allocator,
		char **	ppStatsString,
		VkBool32	detailedMap
	)

Builds and returns statistics as string in JSON format.

Parameters

[out] ppStatsString Must be freed using vmaFreeStatsString() function.

◆ vmaCalculateStats()

void vmaCalculateStats	(	VmaAllocator	allocator,
		VmaStats *	pStats
	)

Retrieves statistics from current state of the Allocator.

◆ vmaCheckCorruption()

VkResult vmaCheckCorruption	(	VmaAllocator	allocator,
		uint32_t	memoryTypeBits
	)

Checks magic number in margins around all allocations in given memory types (in both default and custom pools) in search for corruptions.

Parameters

memoryTypeBits Bit mask, where each bit set means that a memory type with that index should be checked.

Corruption detection is enabled only when VMA_DEBUG_DETECT_CORRUPTION macro is defined to nonzero, VMA_DEBUG_MARGIN is defined to nonzero and only for memory types that are HOST_VISIBLE and HOST_COHERENT. For more information, see Corruption detection.

Possible return values:

VK_ERROR_FEATURE_NOT_PRESENT - corruption detection is not enabled for any of specified memory types.
VK_SUCCESS - corruption detection has been performed and succeeded.
VK_ERROR_VALIDATION_FAILED_EXT - corruption detection has been performed and found memory corruptions around one of the allocations. VMA_ASSERT is also fired in that case.
Other value: Error returned by Vulkan, e.g. memory mapping failure.

◆ vmaCheckPoolCorruption()

VkResult vmaCheckPoolCorruption	(	VmaAllocator	allocator,
		VmaPool	pool
	)

Checks magic number in margins around all allocations in given memory pool in search for corruptions.

Corruption detection is enabled only when VMA_DEBUG_DETECT_CORRUPTION macro is defined to nonzero, VMA_DEBUG_MARGIN is defined to nonzero and the pool is created in memory type that is HOST_VISIBLE and HOST_COHERENT. For more information, see Corruption detection.

Possible return values:

VK_ERROR_FEATURE_NOT_PRESENT - corruption detection is not enabled for specified pool.
VK_SUCCESS - corruption detection has been performed and succeeded.
VK_ERROR_VALIDATION_FAILED_EXT - corruption detection has been performed and found memory corruptions around one of the allocations. VMA_ASSERT is also fired in that case.
Other value: Error returned by Vulkan, e.g. memory mapping failure.

◆ vmaCreateAllocator()

VkResult vmaCreateAllocator	(	const VmaAllocatorCreateInfo *	pCreateInfo,
		VmaAllocator *	pAllocator
	)

Creates Allocator object.

◆ vmaCreateBuffer()

VkResult vmaCreateBuffer	(	VmaAllocator	allocator,
		const VkBufferCreateInfo *	pBufferCreateInfo,
		const VmaAllocationCreateInfo *	pAllocationCreateInfo,
		VkBuffer *	pBuffer,
		VmaAllocation *	pAllocation,
		VmaAllocationInfo *	pAllocationInfo
	)

Parameters

[out]	pBuffer	Buffer that was created.
[out]	pAllocation	Allocation that was created.
[out]	pAllocationInfo	Optional. Information about allocated memory. It can be later fetched using function vmaGetAllocationInfo().

This function automatically:

Creates buffer.
Allocates appropriate memory for it.
Binds the buffer with the memory.

If any of these operations fail, buffer and allocation are not created, returned value is negative error code, *pBuffer and *pAllocation are null.

If the function succeeded, you must destroy both buffer and allocation when you no longer need them using either convenience function vmaDestroyBuffer() or separately, using vkDestroyBuffer() and vmaFreeMemory().

If VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT flag was used, VK_KHR_dedicated_allocation extension is used internally to query driver whether it requires or prefers the new buffer to have dedicated allocation. If yes, and if dedicated allocation is possible (VmaAllocationCreateInfo::pool is null and VMA_ALLOCATION_CREATE_NEVER_ALLOCATE_BIT is not used), it creates dedicated allocation for this buffer, just like when using VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT.

◆ vmaCreateImage()

VkResult vmaCreateImage	(	VmaAllocator	allocator,
		const VkImageCreateInfo *	pImageCreateInfo,
		const VmaAllocationCreateInfo *	pAllocationCreateInfo,
		VkImage *	pImage,
		VmaAllocation *	pAllocation,
		VmaAllocationInfo *	pAllocationInfo
	)

Function similar to vmaCreateBuffer().

◆ vmaCreateLostAllocation()

void vmaCreateLostAllocation	(	VmaAllocator	allocator,
		VmaAllocation *	pAllocation
	)

Creates new allocation that is in lost state from the beginning.

It can be useful if you need a dummy, non-null allocation.

You still need to destroy created object using vmaFreeMemory().

Returned allocation is not tied to any specific memory pool or memory type and not bound to any image or buffer. It has size = 0. It cannot be turned into a real, non-empty allocation.

◆ vmaCreatePool()

VkResult vmaCreatePool	(	VmaAllocator	allocator,
		const VmaPoolCreateInfo *	pCreateInfo,
		VmaPool *	pPool
	)

Allocates Vulkan device memory and creates VmaPool object.

Parameters

	allocator	Allocator object.
	pCreateInfo	Parameters of pool to create.
[out]	pPool	Handle to created pool.

◆ vmaDefragment()

VkResult vmaDefragment	(	VmaAllocator	allocator,
		VmaAllocation *	pAllocations,
		size_t	allocationCount,
		VkBool32 *	pAllocationsChanged,
		const VmaDefragmentationInfo *	pDefragmentationInfo,
		VmaDefragmentationStats *	pDefragmentationStats
	)

Deprecated. Compacts memory by moving allocations.

Parameters

	pAllocations	Array of allocations that can be moved during this compation.
	allocationCount	Number of elements in pAllocations and pAllocationsChanged arrays.
[out]	pAllocationsChanged	Array of boolean values that will indicate whether matching allocation in pAllocations array has been moved. This parameter is optional. Pass null if you don't need this information.
	pDefragmentationInfo	Configuration parameters. Optional - pass null to use default values.
[out]	pDefragmentationStats	Statistics returned by the function. Optional - pass null if you don't need this information.

Returns: VK_SUCCESS if completed, negative error code in case of error.

Deprecated:: This is a part of the old interface. It is recommended to use structure VmaDefragmentationInfo2 and function vmaDefragmentationBegin() instead.

This function works by moving allocations to different places (different VkDeviceMemory objects and/or different offsets) in order to optimize memory usage. Only allocations that are in pAllocations array can be moved. All other allocations are considered nonmovable in this call. Basic rules:

Only allocations made in memory types that have VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT and VK_MEMORY_PROPERTY_HOST_COHERENT_BIT flags can be compacted. You may pass other allocations but it makes no sense - these will never be moved.
Custom pools created with VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT or VMA_POOL_CREATE_BUDDY_ALGORITHM_BIT flag are not defragmented. Allocations passed to this function that come from such pools are ignored.
Allocations created with VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT or created as dedicated allocations for any other reason are also ignored.
Both allocations made with or without VMA_ALLOCATION_CREATE_MAPPED_BIT flag can be compacted. If not persistently mapped, memory will be mapped temporarily inside this function if needed.
You must not pass same VmaAllocation object multiple times in pAllocations array.

The function also frees empty VkDeviceMemory blocks.

Warning: This function may be time-consuming, so you shouldn't call it too often (like after every resource creation/destruction). You can call it on special occasions (like when reloading a game level or when you just destroyed a lot of objects). Calling it every frame may be OK, but you should measure that on your platform.

For more information, see Defragmentation chapter.

◆ vmaDefragmentationBegin()

VkResult vmaDefragmentationBegin	(	VmaAllocator	allocator,
		const VmaDefragmentationInfo2 *	pInfo,
		VmaDefragmentationStats *	pStats,
		VmaDefragmentationContext *	pContext
	)

Begins defragmentation process.

Parameters

	allocator	Allocator object.
	pInfo	Structure filled with parameters of defragmentation.
[out]	pStats	Optional. Statistics of defragmentation. You can pass null if you are not interested in this information.
[out]	pContext	Context object that must be passed to vmaDefragmentationEnd() to finish defragmentation.

Returns: VK_SUCCESS and *pContext == null if defragmentation finished within this function call. VK_NOT_READY and *pContext != null if defragmentation has been started and you need to call vmaDefragmentationEnd() to finish it. Negative value in case of error.

Use this function instead of old, deprecated vmaDefragment().

Warning! Between the call to vmaDefragmentationBegin() and vmaDefragmentationEnd():

You should not use any of allocations passed as pInfo->pAllocations or any allocations that belong to pools passed as pInfo->pPools, including calling vmaGetAllocationInfo(), vmaTouchAllocation(), or access their data.
Some mutexes protecting internal data structures may be locked, so trying to make or free any allocations, bind buffers or images, map memory, or launch another simultaneous defragmentation in between may cause stall (when done on another thread) or deadlock (when done on the same thread), unless you are 100% sure that defragmented allocations are in different pools.
Information returned via pStats and pInfo->pAllocationsChanged are undefined. They become valid after call to vmaDefragmentationEnd().
If pInfo->commandBuffer is not null, you must submit that command buffer and make sure it finished execution before calling vmaDefragmentationEnd().

◆ vmaDefragmentationEnd()

VkResult vmaDefragmentationEnd	(	VmaAllocator	allocator,
		VmaDefragmentationContext	context
	)

Ends defragmentation process.

Use this function to finish defragmentation started by vmaDefragmentationBegin(). It is safe to pass context == null. The function then does nothing.

◆ vmaDestroyAllocator()

void vmaDestroyAllocator ( VmaAllocator allocator )

Destroys allocator object.

◆ vmaDestroyBuffer()

void vmaDestroyBuffer	(	VmaAllocator	allocator,
		VkBuffer	buffer,
		VmaAllocation	allocation
	)

Destroys Vulkan buffer and frees allocated memory.

This is just a convenience function equivalent to:

vkDestroyBuffer(device, buffer, allocationCallbacks);

vmaFreeMemory(allocator, allocation);

It it safe to pass null as buffer and/or allocation.

◆ vmaDestroyImage()

void vmaDestroyImage	(	VmaAllocator	allocator,
		VkImage	image,
		VmaAllocation	allocation
	)

Destroys Vulkan image and frees allocated memory.

This is just a convenience function equivalent to:

vkDestroyImage(device, image, allocationCallbacks);

vmaFreeMemory(allocator, allocation);

It it safe to pass null as image and/or allocation.

◆ vmaDestroyPool()

void vmaDestroyPool	(	VmaAllocator	allocator,
		VmaPool	pool
	)

Destroys VmaPool object and frees Vulkan device memory.

◆ vmaFindMemoryTypeIndex()

VkResult vmaFindMemoryTypeIndex	(	VmaAllocator	allocator,
		uint32_t	memoryTypeBits,
		const VmaAllocationCreateInfo *	pAllocationCreateInfo,
		uint32_t *	pMemoryTypeIndex
	)

Helps to find memoryTypeIndex, given memoryTypeBits and VmaAllocationCreateInfo.

This algorithm tries to find a memory type that:

Is allowed by memoryTypeBits.
Contains all the flags from pAllocationCreateInfo->requiredFlags.
Matches intended usage.
Has as many flags from pAllocationCreateInfo->preferredFlags as possible.

Returns: Returns VK_ERROR_FEATURE_NOT_PRESENT if not found. Receiving such result from this function or any other allocating function probably means that your device doesn't support any memory type with requested features for the specific type of resource you want to use it for. Please check parameters of your resource, like image layout (OPTIMAL versus LINEAR) or mip level count.

◆ vmaFindMemoryTypeIndexForBufferInfo()

VkResult vmaFindMemoryTypeIndexForBufferInfo	(	VmaAllocator	allocator,
		const VkBufferCreateInfo *	pBufferCreateInfo,
		const VmaAllocationCreateInfo *	pAllocationCreateInfo,
		uint32_t *	pMemoryTypeIndex
	)

Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.

It can be useful e.g. to determine value to be used as VmaPoolCreateInfo::memoryTypeIndex. It internally creates a temporary, dummy buffer that never has memory bound. It is just a convenience function, equivalent to calling:

vkCreateBuffer
vkGetBufferMemoryRequirements
vmaFindMemoryTypeIndex
vkDestroyBuffer

◆ vmaFindMemoryTypeIndexForImageInfo()

VkResult vmaFindMemoryTypeIndexForImageInfo	(	VmaAllocator	allocator,
		const VkImageCreateInfo *	pImageCreateInfo,
		const VmaAllocationCreateInfo *	pAllocationCreateInfo,
		uint32_t *	pMemoryTypeIndex
	)

Helps to find memoryTypeIndex, given VkImageCreateInfo and VmaAllocationCreateInfo.

It can be useful e.g. to determine value to be used as VmaPoolCreateInfo::memoryTypeIndex. It internally creates a temporary, dummy image that never has memory bound. It is just a convenience function, equivalent to calling:

vkCreateImage
vkGetImageMemoryRequirements
vmaFindMemoryTypeIndex
vkDestroyImage

◆ vmaFlushAllocation()

void vmaFlushAllocation	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VkDeviceSize	offset,
		VkDeviceSize	size
	)

Flushes memory of given allocation.

Calls vkFlushMappedMemoryRanges() for memory associated with given range of given allocation.

offset must be relative to the beginning of allocation.
size can be VK_WHOLE_SIZE. It means all memory from offset the the end of given allocation.
offset and size don't have to be aligned. They are internally rounded down/up to multiply of nonCoherentAtomSize.
If size is 0, this call is ignored.
If memory type that the allocation belongs to is not HOST_VISIBLE or it is HOST_COHERENT, this call is ignored.

◆ vmaFreeMemory()

void vmaFreeMemory	(	VmaAllocator	allocator,
		VmaAllocation	allocation
	)

Frees memory previously allocated using vmaAllocateMemory(), vmaAllocateMemoryForBuffer(), or vmaAllocateMemoryForImage().

Passing VK_NULL_HANDLE as allocation is valid. Such function call is just skipped.

◆ vmaFreeMemoryPages()

void vmaFreeMemoryPages	(	VmaAllocator	allocator,
		size_t	allocationCount,
		VmaAllocation *	pAllocations
	)

Frees memory and destroys multiple allocations.

Word "pages" is just a suggestion to use this function to free pieces of memory used for sparse binding. It is just a general purpose function to free memory and destroy allocations made using e.g. vmaAllocateMemory(), vmaAllocateMemoryPages() and other functions. It may be internally optimized to be more efficient than calling vmaFreeMemory() allocationCount times.

Allocations in pAllocations array can come from any memory pools and types. Passing VK_NULL_HANDLE as elements of pAllocations array is valid. Such entries are just skipped.

◆ vmaFreeStatsString()

void vmaFreeStatsString	(	VmaAllocator	allocator,
		char *	pStatsString
	)

◆ vmaGetAllocationInfo()

void vmaGetAllocationInfo	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VmaAllocationInfo *	pAllocationInfo
	)

Returns current information about specified allocation and atomically marks it as used in current frame.

Current paramters of given allocation are returned in pAllocationInfo.

This function also atomically "touches" allocation - marks it as used in current frame, just like vmaTouchAllocation(). If the allocation is in lost state, pAllocationInfo->deviceMemory == VK_NULL_HANDLE.

Although this function uses atomics and doesn't lock any mutex, so it should be quite efficient, you can avoid calling it too often.

You can retrieve same VmaAllocationInfo structure while creating your resource, from function vmaCreateBuffer(), vmaCreateImage(). You can remember it if you are sure parameters don't change (e.g. due to defragmentation or allocation becoming lost).
If you just want to check if allocation is not lost, vmaTouchAllocation() will work faster.

◆ vmaGetMemoryProperties()

void vmaGetMemoryProperties	(	VmaAllocator	allocator,
		const VkPhysicalDeviceMemoryProperties **	ppPhysicalDeviceMemoryProperties
	)

PhysicalDeviceMemoryProperties are fetched from physicalDevice by the allocator. You can access it here, without fetching it again on your own.

◆ vmaGetMemoryTypeProperties()

void vmaGetMemoryTypeProperties	(	VmaAllocator	allocator,
		uint32_t	memoryTypeIndex,
		VkMemoryPropertyFlags *	pFlags
	)

Given Memory Type Index, returns Property Flags of this memory type.

This is just a convenience function. Same information can be obtained using vmaGetMemoryProperties().

◆ vmaGetPhysicalDeviceProperties()

void vmaGetPhysicalDeviceProperties	(	VmaAllocator	allocator,
		const VkPhysicalDeviceProperties **	ppPhysicalDeviceProperties
	)

PhysicalDeviceProperties are fetched from physicalDevice by the allocator. You can access it here, without fetching it again on your own.

◆ vmaGetPoolStats()

void vmaGetPoolStats	(	VmaAllocator	allocator,
		VmaPool	pool,
		VmaPoolStats *	pPoolStats
	)

Retrieves statistics of existing VmaPool object.

Parameters

	allocator	Allocator object.
	pool	Pool object.
[out]	pPoolStats	Statistics of specified pool.

◆ vmaInvalidateAllocation()

void vmaInvalidateAllocation	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VkDeviceSize	offset,
		VkDeviceSize	size
	)

Invalidates memory of given allocation.

Calls vkInvalidateMappedMemoryRanges() for memory associated with given range of given allocation.

offset must be relative to the beginning of allocation.
size can be VK_WHOLE_SIZE. It means all memory from offset the the end of given allocation.
offset and size don't have to be aligned. They are internally rounded down/up to multiply of nonCoherentAtomSize.
If size is 0, this call is ignored.
If memory type that the allocation belongs to is not HOST_VISIBLE or it is HOST_COHERENT, this call is ignored.

◆ vmaMakePoolAllocationsLost()

void vmaMakePoolAllocationsLost	(	VmaAllocator	allocator,
		VmaPool	pool,
		size_t *	pLostAllocationCount
	)

Marks all allocations in given pool as lost if they are not used in current frame or VmaPoolCreateInfo::frameInUseCount back from now.

Parameters

	allocator	Allocator object.
	pool	Pool.
[out]	pLostAllocationCount	Number of allocations marked as lost. Optional - pass null if you don't need this information.

◆ vmaMapMemory()

VkResult vmaMapMemory	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		void **	ppData
	)

Maps memory represented by given allocation and returns pointer to it.

Maps memory represented by given allocation to make it accessible to CPU code. When succeeded, *ppData contains pointer to first byte of this memory. If the allocation is part of bigger VkDeviceMemory block, the pointer is correctly offseted to the beginning of region assigned to this particular allocation.

Mapping is internally reference-counted and synchronized, so despite raw Vulkan function vkMapMemory() cannot be used to map same block of VkDeviceMemory multiple times simultaneously, it is safe to call this function on allocations assigned to the same memory block. Actual Vulkan memory will be mapped on first mapping and unmapped on last unmapping.

If the function succeeded, you must call vmaUnmapMemory() to unmap the allocation when mapping is no longer needed or before freeing the allocation, at the latest.

It also safe to call this function multiple times on the same allocation. You must call vmaUnmapMemory() same number of times as you called vmaMapMemory().

It is also safe to call this function on allocation created with VMA_ALLOCATION_CREATE_MAPPED_BIT flag. Its memory stays mapped all the time. You must still call vmaUnmapMemory() same number of times as you called vmaMapMemory(). You must not call vmaUnmapMemory() additional time to free the "0-th" mapping made automatically due to VMA_ALLOCATION_CREATE_MAPPED_BIT flag.

This function fails when used on allocation made in memory type that is not HOST_VISIBLE.

This function always fails when called for allocation that was created with VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT flag. Such allocations cannot be mapped.

◆ vmaResizeAllocation()

VkResult vmaResizeAllocation	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		VkDeviceSize	newSize
	)

Tries to resize an allocation in place, if there is enough free memory after it.

Tries to change allocation's size without moving or reallocating it. You can both shrink and grow allocation size. When growing, it succeeds only when the allocation belongs to a memory block with enough free space after it.

Returns VK_SUCCESS if allocation's size has been successfully changed. Returns VK_ERROR_OUT_OF_POOL_MEMORY if allocation's size could not be changed.

After successful call to this function, VmaAllocationInfo::size of this allocation changes. All other parameters stay the same: memory pool and type, alignment, offset, mapped pointer.

Calling this function on allocation that is in lost state fails with result VK_ERROR_VALIDATION_FAILED_EXT.
Calling this function with newSize same as current allocation size does nothing and returns VK_SUCCESS.
Resizing dedicated allocations, as well as allocations created in pools that use linear or buddy algorithm, is not supported. The function returns VK_ERROR_FEATURE_NOT_PRESENT in such cases. Support may be added in the future.

◆ vmaSetAllocationUserData()

void vmaSetAllocationUserData	(	VmaAllocator	allocator,
		VmaAllocation	allocation,
		void *	pUserData
	)

Sets pUserData in given allocation to new value.

If the allocation was created with VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT, pUserData must be either null, or pointer to a null-terminated string. The function makes local copy of the string and sets it as allocation's pUserData. String passed as pUserData doesn't need to be valid for whole lifetime of the allocation - you can free it after this call. String previously pointed by allocation's pUserData is freed from memory.

If the flag was not used, the value of pointer pUserData is just copied to allocation's pUserData. It is opaque, so you can use it however you want - e.g. as a pointer, ordinal number or some handle to you own data.

◆ vmaSetCurrentFrameIndex()

void vmaSetCurrentFrameIndex	(	VmaAllocator	allocator,
		uint32_t	frameIndex
	)

Sets index of the current frame.

This function must be used if you make allocations with VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT and VMA_ALLOCATION_CREATE_CAN_MAKE_OTHER_LOST_BIT flags to inform the allocator when a new frame begins. Allocations queried using vmaGetAllocationInfo() cannot become lost in the current frame.

◆ vmaTouchAllocation()

VkBool32 vmaTouchAllocation	(	VmaAllocator	allocator,
		VmaAllocation	allocation
	)

Returns VK_TRUE if allocation is not lost and atomically marks it as used in current frame.

If the allocation has been created with VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT flag, this function returns VK_TRUE if it's not in lost state, so it can still be used. It then also atomically "touches" the allocation - marks it as used in current frame, so that you can be sure it won't become lost in current frame or next frameInUseCount frames.

If the allocation is in lost state, the function returns VK_FALSE. Memory of such allocation, as well as buffer or image bound to it, should not be used. Lost allocation and the buffer/image still need to be destroyed.

If the allocation has been created without VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT flag, this function always returns VK_TRUE.

◆ vmaUnmapMemory()

void vmaUnmapMemory	(	VmaAllocator	allocator,
		VmaAllocation	allocation
	)

Unmaps memory represented by given allocation, mapped previously using vmaMapMemory().

For details, see description of vmaMapMemory().

Classes

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ NOMINMAX

◆ VMA_DEDICATED_ALLOCATION

◆ VMA_RECORDING_ENABLED

◆ VMA_STATS_STRING_ENABLED

Typedef Documentation

◆ PFN_vmaAllocateDeviceMemoryFunction

◆ PFN_vmaFreeDeviceMemoryFunction

◆ VmaAllocationCreateFlagBits

◆ VmaAllocationCreateFlags

◆ VmaAllocationCreateInfo

◆ VmaAllocationInfo

◆ VmaAllocatorCreateFlagBits

◆ VmaAllocatorCreateFlags

◆ VmaAllocatorCreateInfo

◆ VmaDefragmentationFlagBits

◆ VmaDefragmentationFlags

◆ VmaDefragmentationInfo

◆ VmaDefragmentationInfo2

◆ VmaDefragmentationStats

◆ VmaDeviceMemoryCallbacks

◆ VmaMemoryUsage

◆ VmaPoolCreateFlagBits

◆ VmaPoolCreateFlags

◆ VmaPoolCreateInfo

◆ VmaPoolStats

◆ VmaRecordFlagBits

◆ VmaRecordFlags

◆ VmaRecordSettings

◆ VmaStatInfo

◆ VmaStats

◆ VmaVulkanFunctions

Enumeration Type Documentation

◆ VmaAllocationCreateFlagBits

◆ VmaAllocatorCreateFlagBits

◆ VmaDefragmentationFlagBits

◆ VmaMemoryUsage

◆ VmaPoolCreateFlagBits

◆ VmaRecordFlagBits

Function Documentation

◆ vmaAllocateMemory()

◆ vmaAllocateMemoryForBuffer()

◆ vmaAllocateMemoryForImage()

◆ vmaAllocateMemoryPages()

◆ vmaBindBufferMemory()

◆ vmaBindImageMemory()

◆ vmaBuildStatsString()

◆ vmaCalculateStats()

◆ vmaCheckCorruption()

◆ vmaCheckPoolCorruption()

◆ vmaCreateAllocator()

◆ vmaCreateBuffer()

◆ vmaCreateImage()

◆ vmaCreateLostAllocation()

◆ vmaCreatePool()

◆ vmaDefragment()

◆ vmaDefragmentationBegin()

◆ vmaDefragmentationEnd()

◆ vmaDestroyAllocator()

◆ vmaDestroyBuffer()

◆ vmaDestroyImage()

◆ vmaDestroyPool()

◆ vmaFindMemoryTypeIndex()

◆ vmaFindMemoryTypeIndexForBufferInfo()

◆ vmaFindMemoryTypeIndexForImageInfo()

◆ vmaFlushAllocation()

◆ vmaFreeMemory()

◆ vmaFreeMemoryPages()

◆ vmaFreeStatsString()

◆ vmaGetAllocationInfo()

◆ vmaGetMemoryProperties()

◆ vmaGetMemoryTypeProperties()

◆ vmaGetPhysicalDeviceProperties()

◆ vmaGetPoolStats()

◆ vmaInvalidateAllocation()