C Specification

To decompress data between one or more memory regions 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 source to destination region based on the specified decompression method.

Valid Usage
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 graphics, or compute operations

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

  • 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






See Also

Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0