# vkCmdDecompressMemoryEXT(3) Manual Page

## Name

vkCmdDecompressMemoryEXT - Decompress data between memory regions

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## C Specification

To decompress memory containing compressed data, call:

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

## Parameters

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

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

## Description

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

## See Also

VK_EXT_memory_decompression, VkCommandBuffer, VkDecompressMemoryInfoEXT

## 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

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0