# Vulkan® 1.4.335 - A Specification (with all registered extensions)

The Khronos® Vulkan Working Group
version 1.4.335, 2025-12-14 14:15:16Z
from git branch: makepkg commit: 60a4ad187cf3be4ede658f0fae7dd392192a314b

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## 44. Memory Decompression

Commands that can be used to decompress memory between one or more memory regions are vkCmdDecompressMemoryEXT, vkCmdDecompressMemoryNV, vkCmdDecompressMemoryIndirectCountNV, and vkCmdDecompressMemoryIndirectCountEXT.

To decompress memory containing compressed data, call:

    // Provided by VK_EXT_memory_decompression
    void vkCmdDecompressMemoryEXT(
        VkCommandBuffer                             commandBuffer,
        const VkDecompressMemoryInfoEXT*            pDecompressMemoryInfoEXT);

- `commandBuffer` is the command buffer into which the command will be recorded.

- `pDecompressMemoryInfoEXT` is a pointer to a VkDecompressMemoryInfoEXT structure describing the decompression parameters.

Valid Usage

- VUID-vkCmdDecompressMemoryEXT-memoryDecompression-11761
  The `memoryDecompression` feature must be enabled

Valid Usage (Implicit)

- VUID-vkCmdDecompressMemoryEXT-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdDecompressMemoryEXT-pDecompressMemoryInfoEXT-parameter
  `pDecompressMemoryInfoEXT` must be a valid pointer to a valid VkDecompressMemoryInfoEXT structure

- VUID-vkCmdDecompressMemoryEXT-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdDecompressMemoryEXT-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support `VK_QUEUE_COMPUTE_BIT`, or `VK_QUEUE_GRAPHICS_BIT` operations

- VUID-vkCmdDecompressMemoryEXT-renderpass
  This command must only be called outside of a render pass instance

- VUID-vkCmdDecompressMemoryEXT-suspended
  This command must not be called between suspended render pass instances

- VUID-vkCmdDecompressMemoryEXT-videocoding
  This command must only be called outside of a video coding scope

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Outside | Outside | VK_QUEUE_COMPUTE_BIT VK_QUEUE_GRAPHICS_BIT | Action

Conditional Rendering

vkCmdDecompressMemoryEXT is not affected by conditional rendering

The `VkDecompressMemoryInfoEXT` structure is defined as:

    // Provided by VK_EXT_memory_decompression
    typedef struct VkDecompressMemoryInfoEXT {
        VkStructureType                        sType;
        const void*                            pNext;
        VkMemoryDecompressionMethodFlagsEXT    decompressionMethod;
        uint32_t                               regionCount;
        const VkDecompressMemoryRegionEXT*     pRegions;
    } VkDecompressMemoryInfoEXT;

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `decompressionMethod` is a bitmask of VkMemoryDecompressionMethodFlagBitsEXT with a single bit set specifying the method used to decompress data.

- `regionCount` is the number of regions to decompress.

- `pRegions` is a pointer to an array of VkDecompressMemoryRegionEXT structures specifying the regions to decompress.

Each memory region specified in `pRegions` is decompressed from the source to the destination address based on the decompression method specified in `decompressionMethod`. If any of the specified source and destination regions overlap in memory, then the results of decompression are undefined.

Valid Usage

- VUID-VkDecompressMemoryInfoEXT-decompressionMethod-07690
  The `decompressionMethod` must have a single bit set

- VUID-VkDecompressMemoryInfoEXT-decompressionMethod-11762
  If `decompressionMethod` is `VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_EXT`, then for each element of `pRegions`, `decompressedSize` must be less than or equal to 65536 bytes

- VUID-VkDecompressMemoryInfoEXT-decompressionMethod-11763
  `decompressionMethod` must be a valid bit specified in `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`decompressionMethods`

Valid Usage (Implicit)

- VUID-VkDecompressMemoryInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_DECOMPRESS_MEMORY_INFO_EXT`

- VUID-VkDecompressMemoryInfoEXT-pNext-pNext
  `pNext` must be `NULL`

- VUID-VkDecompressMemoryInfoEXT-decompressionMethod-parameter
  `decompressionMethod` must be a valid combination of VkMemoryDecompressionMethodFlagBitsEXT values

- VUID-VkDecompressMemoryInfoEXT-decompressionMethod-requiredbitmask
  `decompressionMethod` must not be `0`

- VUID-VkDecompressMemoryInfoEXT-pRegions-parameter
  `pRegions` must be a valid pointer to an array of `regionCount` VkDecompressMemoryRegionEXT structures

- VUID-VkDecompressMemoryInfoEXT-regionCount-arraylength
  `regionCount` must be greater than `0`

The `VkDecompressMemoryRegionEXT` structure is defined as:

    // Provided by VK_EXT_memory_decompression
    typedef struct VkDecompressMemoryRegionEXT {
        VkDeviceAddress    srcAddress;
        VkDeviceAddress    dstAddress;
        VkDeviceSize       compressedSize;
        VkDeviceSize       decompressedSize;
    } VkDecompressMemoryRegionEXT;

- `srcAddress` is the address where compressed data is stored.

- `dstAddress` is the destination address where decompressed data will be written.

- `compressedSize` is the size of compressed data in bytes.

- `decompressedSize` is the size of decompressed data in bytes.

Accesses to compressed and decompressed data specified in `srcAddress` and `dstAddress` must be synchronized with the `VK_PIPELINE_STAGE_2_MEMORY_DECOMPRESSION_BIT_EXT` pipeline stage with access type of `VK_ACCESS_2_MEMORY_DECOMPRESSION_READ_BIT_EXT` or `VK_ACCESS_2_MEMORY_DECOMPRESSION_WRITE_BIT_EXT`.

Valid Usage

- VUID-VkDecompressMemoryRegionEXT-srcAddress-07685
  `srcAddress` must be 4 byte aligned

- VUID-VkDecompressMemoryRegionEXT-srcAddress-07686
  The memory range defined by `srcAddress` and `compressedSize` must be contained within the size of the buffer bound to `srcAddress`, minus the offset of `srcAddress` from the base address of that buffer

- VUID-VkDecompressMemoryRegionEXT-dstAddress-07687
  `dstAddress` must be 4 byte aligned

- VUID-VkDecompressMemoryRegionEXT-dstAddress-07688
  The memory range defined by `dstAddress` and `decompressedSize` must be contained within the size of the buffer bound to `dstAddress`, minus the offset of `dstAddress` from the base address of that buffer

- VUID-VkDecompressMemoryRegionEXT-decompressedSize-07689
  `decompressedSize` must be large enough to hold the decompressed data based on the `decompressionMethod`

- VUID-VkDecompressMemoryRegionEXT-compressedSize-11795
  `compressedSize` must not be zero

- VUID-VkDecompressMemoryRegionEXT-decompressedSize-11796
  `decompressedSize` must not be zero

- VUID-VkDecompressMemoryRegionEXT-srcAddress-07691
  The memory range defined by `srcAddress` and `compressedSize` must not overlap the memory range defined by `dstAddress` and `decompressedSize`

- VUID-VkDecompressMemoryRegionEXT-srcAddress-11764
  The underlying buffer for `srcAddress` must have the `VK_BUFFER_USAGE_2_MEMORY_DECOMPRESSION_BIT_EXT` bit set in its usage flag

- VUID-VkDecompressMemoryRegionEXT-dstAddress-11765
  The underlying buffer for `dstAddress` must have the `VK_BUFFER_USAGE_2_MEMORY_DECOMPRESSION_BIT_EXT` bit set in its usage flag

Valid Usage (Implicit)

- VUID-VkDecompressMemoryRegionEXT-srcAddress-parameter
  `srcAddress` must be a valid VkDeviceAddress value

- VUID-VkDecompressMemoryRegionEXT-dstAddress-parameter
  `dstAddress` must be a valid VkDeviceAddress value

To decompress memory containing compressed data, call:

    // Provided by VK_NV_memory_decompression
    void vkCmdDecompressMemoryNV(
        VkCommandBuffer                             commandBuffer,
        uint32_t                                    decompressRegionCount,
        const VkDecompressMemoryRegionNV*           pDecompressMemoryRegions);

- `commandBuffer` is the command buffer into which the command will be recorded.

- `decompressRegionCount` is the number of memory regions to decompress.

- `pDecompressMemoryRegions` is a pointer to an array of `decompressRegionCount` VkDecompressMemoryRegionNV structures specifying decompression parameters.

Each region specified in `pDecompressMemoryRegions` is decompressed from the compressed to decompressed region based on the decompression method specified in VkDecompressMemoryRegionNV::`decompressionMethod`. If the regions containing compressed and decompressed data overlap, the decompression behavior is undefined.

Valid Usage

- VUID-vkCmdDecompressMemoryNV-None-07684
  The `memoryDecompression` feature must be enabled

Valid Usage (Implicit)

- VUID-vkCmdDecompressMemoryNV-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdDecompressMemoryNV-pDecompressMemoryRegions-parameter
  `pDecompressMemoryRegions` must be a valid pointer to an array of `decompressRegionCount` valid VkDecompressMemoryRegionNV structures

- VUID-vkCmdDecompressMemoryNV-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdDecompressMemoryNV-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support `VK_QUEUE_COMPUTE_BIT`, or `VK_QUEUE_GRAPHICS_BIT` operations

- VUID-vkCmdDecompressMemoryNV-renderpass
  This command must only be called outside of a render pass instance

- VUID-vkCmdDecompressMemoryNV-suspended
  This command must not be called between suspended render pass instances

- VUID-vkCmdDecompressMemoryNV-videocoding
  This command must only be called outside of a video coding scope

- VUID-vkCmdDecompressMemoryNV-decompressRegionCount-arraylength
  `decompressRegionCount` must be greater than `0`

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Outside | Outside | VK_QUEUE_COMPUTE_BIT VK_QUEUE_GRAPHICS_BIT | Action

Conditional Rendering

vkCmdDecompressMemoryNV is not affected by conditional rendering

The `VkDecompressMemoryRegionNV` structure is defined as:

    // Provided by VK_NV_memory_decompression
    typedef struct VkDecompressMemoryRegionNV {
        VkDeviceAddress                       srcAddress;
        VkDeviceAddress                       dstAddress;
        VkDeviceSize                          compressedSize;
        VkDeviceSize                          decompressedSize;
        VkMemoryDecompressionMethodFlagsNV    decompressionMethod;
    } VkDecompressMemoryRegionNV;

- `srcAddress` is the address where compressed data is stored.

- `dstAddress` is the destination address where decompressed data will be written.

- `compressedSize` is the size of compressed data in bytes.

- `decompressedSize` is the size of decompressed data in bytes.

- `decompressionMethod` is a bitmask of VkMemoryDecompressionMethodFlagBitsNV with a single bit set specifying the method used to decompress data.

Valid Usage

- VUID-VkDecompressMemoryRegionNV-decompressionMethod-07690
  The `decompressionMethod` must have a single bit set

- VUID-VkDecompressMemoryRegionNV-srcAddress-07685
  `srcAddress` must be 4 byte aligned

- VUID-VkDecompressMemoryRegionNV-srcAddress-07686
  The memory range defined by `srcAddress` and `compressedSize` must be contained within the size of the buffer bound to `srcAddress`, minus the offset of `srcAddress` from the base address of that buffer

- VUID-VkDecompressMemoryRegionNV-dstAddress-07687
  `dstAddress` must be 4 byte aligned

- VUID-VkDecompressMemoryRegionNV-dstAddress-07688
  The memory range defined by `dstAddress` and `decompressedSize` must be contained within the size of the buffer bound to `dstAddress`, minus the offset of `dstAddress` from the base address of that buffer

- VUID-VkDecompressMemoryRegionNV-decompressedSize-07689
  `decompressedSize` must be large enough to hold the decompressed data based on the `decompressionMethod`

- VUID-VkDecompressMemoryRegionNV-compressedSize-11795
  `compressedSize` must not be zero

- VUID-VkDecompressMemoryRegionNV-decompressedSize-11796
  `decompressedSize` must not be zero

- VUID-VkDecompressMemoryRegionNV-srcAddress-07691
  The memory range defined by `srcAddress` and `compressedSize` must not overlap the memory range defined by `dstAddress` and `decompressedSize`

- VUID-VkDecompressMemoryRegionNV-decompressionMethod-09395
  If `decompressionMethod` is `VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_EXT`, then `decompressedSize` must be less than or equal to 65536 bytes

- VUID-vkCmdDecompressMemoryNV-memoryDecompression-11766
  The `memoryDecompression` feature must be enabled

To decompress data between one or more memory regions by specifying decompression parameters indirectly in a buffer, call:

    // Provided by VK_EXT_memory_decompression
    void vkCmdDecompressMemoryIndirectCountEXT(
        VkCommandBuffer                             commandBuffer,
        VkMemoryDecompressionMethodFlagsEXT         decompressionMethod,
        VkDeviceAddress                             indirectCommandsAddress,
        VkDeviceAddress                             indirectCommandsCountAddress,
        uint32_t                                    maxDecompressionCount,
        uint32_t                                    stride);

- `commandBuffer` is the command buffer into which the command will be recorded.

- `decompressionMethod` is a bitmask of VkMemoryDecompressionMethodFlagBitsEXT with a single bit set specifying the method used to decompress data.

- `indirectCommandsAddress` is the device address containing decompression parameters laid out as an array of VkDecompressMemoryRegionEXT structures.

- `indirectCommandsCountAddress` is the device address containing a 32-bit integer value specifying the decompression count.

- `maxDecompressionCount` is maximum number of decompressions that will be executed. The actual number of executed decompressions is the minimum of the count specified in `indirectCommandsCountAddress` and `maxDecompressionCount`.

- `stride` is the byte stride between successive sets of decompression parameters located starting from `indirectCommandsAddress`.

Each region specified in `indirectCommandsAddress` is decompressed from the source to destination region based on the specified `decompressionMethod`.

Valid Usage

- VUID-vkCmdDecompressMemoryIndirectCountEXT-None-07692
  The `memoryDecompression` feature must be enabled

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsAddress-07694
  The VkBuffer that `indirectCommandsAddress` comes from must have been created with the `VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT` usage flag set

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsAddress-07695
  `indirectCommandsAddress` must be a multiple of `4`

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsCountAddress-07697
  The VkBuffer that `indirectCommandsCountAddress` comes from must have been created with the `VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT` usage flag set

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsCountAddress-07698
  `indirectCommandsCountAddress` must be a multiple of `4`

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsCountAddress-07699
  The count stored in `indirectCommandsCountAddress` must be less than or equal to `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`maxDecompressionIndirectCount`

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsAddress-11794
  All device addresses between `indirectCommandsAddress` and `indirectCommandsAddress` + (`stride` × (count stored in `indirectCommandsCountAddress`)) - 1 must be in the buffer device address range of the same buffer

- VUID-vkCmdDecompressMemoryIndirectCountEXT-decompressionMethod-07690
  The `decompressionMethod` must have a single bit set

- VUID-vkCmdDecompressMemoryIndirectCountEXT-stride-11767
  `stride` must be a multiple of `4` and must be greater than or equal to sizeof(VkDecompressMemoryRegionEXT)

- VUID-vkCmdDecompressMemoryIndirectCountEXT-maxDecompressionCount-11768
  `maxDecompressionCount` must be less than or equal to `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`maxDecompressionIndirectCount`

- VUID-vkCmdDecompressMemoryIndirectCountEXT-decompressionMethod-11769
  If `decompressionMethod` is `VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_EXT`, then all values in VkDecompressMemoryRegionEXT::`decompressedSize` must be less than or equal to 65536 bytes

- VUID-vkCmdDecompressMemoryIndirectCountEXT-decompressionMethod-11810
  `decompressionMethod` must be a valid bit specified in `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`decompressionMethods`

Valid Usage (Implicit)

- VUID-vkCmdDecompressMemoryIndirectCountEXT-commandBuffer-parameter
  `commandBuffer` must be a valid VkCommandBuffer handle

- VUID-vkCmdDecompressMemoryIndirectCountEXT-decompressionMethod-parameter
  `decompressionMethod` must be a valid combination of VkMemoryDecompressionMethodFlagBitsEXT values

- VUID-vkCmdDecompressMemoryIndirectCountEXT-decompressionMethod-requiredbitmask
  `decompressionMethod` must not be `0`

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsAddress-parameter
  `indirectCommandsAddress` must be a valid VkDeviceAddress value

- VUID-vkCmdDecompressMemoryIndirectCountEXT-indirectCommandsCountAddress-parameter
  `indirectCommandsCountAddress` must be a valid VkDeviceAddress value

- VUID-vkCmdDecompressMemoryIndirectCountEXT-commandBuffer-recording
  `commandBuffer` must be in the recording state

- VUID-vkCmdDecompressMemoryIndirectCountEXT-commandBuffer-cmdpool
  The `VkCommandPool` that `commandBuffer` was allocated from must support `VK_QUEUE_COMPUTE_BIT`, or `VK_QUEUE_GRAPHICS_BIT` operations

- VUID-vkCmdDecompressMemoryIndirectCountEXT-renderpass
  This command must only be called outside of a render pass instance

- VUID-vkCmdDecompressMemoryIndirectCountEXT-suspended
  This command must not be called between suspended render pass instances

- VUID-vkCmdDecompressMemoryIndirectCountEXT-videocoding
  This command must only be called outside of a video coding scope

Host Synchronization

- Host access to `commandBuffer` must be externally synchronized

- Host access to the `VkCommandPool` that `commandBuffer` was allocated from must be externally synchronized

Command Properties

Command Buffer Levels | Render Pass Scope | Video Coding Scope | Supported Queue Types | Command Type
--- | --- | --- | --- | ---
Primary Secondary | Outside | Outside | VK_QUEUE_COMPUTE_BIT VK_QUEUE_GRAPHICS_BIT | Action

Conditional Rendering

vkCmdDecompressMemoryIndirectCountEXT is not affected by conditional rendering

To decompress data between one or more memory regions by specifying decompression parameters indirectly in a buffer, call:

    // Provided by VK_NV_memory_decompression
    void vkCmdDecompressMemoryIndirectCountNV(
        VkCommandBuffer                             commandBuffer,
        VkDeviceAddress                             indirectCommandsAddress,
        VkDeviceAddress                             indirectCommandsCountAddress,
        uint32_t                                    stride);

- `commandBuffer` is the command buffer into which the command will be recorded.

- `indirectCommandsAddress` is the device address containing decompression parameters laid out as an array of VkDecompressMemoryRegionNV structures.

- `indirectCommandsCountAddress` is the device address containing a 32-bit integer value specifying the decompression count.

- `stride` is the byte stride between successive sets of decompression parameters located starting from `indirectCommandsAddress`.

Each region specified in `indirectCommandsAddress` is decompressed from the source to destination region based on the specified `decompressionMethod`.

Valid Usage

- VUID-vkCmdDecompressMemoryIndirectCountNV-None-07692
  The `memoryDecompression` feature must be enabled

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsAddress-07694
  The VkBuffer that `indirectCommandsAddress` comes from must have been created with the `VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT` usage flag set

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsAddress-07695
  `indirectCommandsAddress` must be a multiple of `4`

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsCountAddress-07697
  The VkBuffer that `indirectCommandsCountAddress` comes from must have been created with the `VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT` usage flag set

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsCountAddress-07698
  `indirectCommandsCountAddress` must be a multiple of `4`

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsCountAddress-07699
  The count stored in `indirectCommandsCountAddress` must be less than or equal to `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`maxDecompressionIndirectCount`

- VUID-vkCmdDecompressMemoryIndirectCountNV-indirectCommandsAddress-11794
  All device addresses between `indirectCommandsAddress` and `indirectCommandsAddress` + (`stride` × (count stored in `indirectCommandsCountAddress`)) - 1 must be in the buffer device address range of the same buffer

- VUID-vkCmdDecompressMemoryIndirectCountNV-stride-11770
  `stride` must be a multiple of `4` and must be greater than or equal to sizeof(VkDecompressMemoryRegionNV)

Bits which can be set in `VkDecompressMemoryRegionEXT`::`decompressionMethod` or `VkDecompressMemoryRegionNV`::`decompressionMethod` specifying the decompression method to select, or returned in `VkPhysicalDeviceMemoryDecompressionPropertiesEXT`::`decompressionMethods` specifying the available decompression methods are:

    // Provided by VK_EXT_memory_decompression
    // Flag bits for VkMemoryDecompressionMethodFlagBitsEXT
    typedef VkFlags64 VkMemoryDecompressionMethodFlagBitsEXT;
    static const VkMemoryDecompressionMethodFlagBitsEXT VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_EXT = 0x00000001ULL;
    static const VkMemoryDecompressionMethodFlagBitsEXT VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_NV = 0x00000001ULL;

    // Provided by VK_NV_memory_decompression
    // Equivalent to VkMemoryDecompressionMethodFlagBitsEXT
    typedef VkMemoryDecompressionMethodFlagBitsEXT VkMemoryDecompressionMethodFlagBitsNV;

- `VK_MEMORY_DECOMPRESSION_METHOD_GDEFLATE_1_0_BIT_EXT` specifies that the GDeflate 1.0 algorithm is used to decompress data.

    // Provided by VK_EXT_memory_decompression
    typedef VkFlags64 VkMemoryDecompressionMethodFlagsEXT;

    // Provided by VK_NV_memory_decompression
    // Equivalent to VkMemoryDecompressionMethodFlagsEXT
    typedef VkMemoryDecompressionMethodFlagsEXT VkMemoryDecompressionMethodFlagsNV;

`VkMemoryDecompressionMethodFlagsEXT` is a bitmask type for specifying a mask of one or more VkMemoryDecompressionMethodFlagBitsEXT.