# VK_EXT_texture_compression_astc_3d(3) Manual Page

## Name

VK_EXT_texture_compression_astc_3d - device extension

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## Registered Extension Number

289

## Revision

1

## Ratification Status

Ratified

## Extension and Version Dependencies

VK_KHR_get_physical_device_properties2
or
Vulkan Version 1.1

## Contact

- Jan-Harald Fredriksen [GitHub]janharaldfredriksen-arm

## Extension Proposal

VK_EXT_texture_compression_astc_3d

## Other Extension Metadata

Last Modified Date

  2025-06-09

IP Status

  No known issues.

Contributors

  - Jan-Harald Fredriksen, Arm

## Description

This extension adds support for 3D textures compressed using the Adaptive Scalable Texture Compression (ASTC) format.

These formats are compressed in 3D. As such, each slice will contain data for a Width x Height x Depth block of the texture. All transfer operations are done at the granularity of block dimensions.

## New Structures

- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:

  - VkPhysicalDeviceTextureCompressionASTC3DFeaturesEXT

## New Enum Constants

- `VK_EXT_TEXTURE_COMPRESSION_ASTC_3D_EXTENSION_NAME`

- `VK_EXT_TEXTURE_COMPRESSION_ASTC_3D_SPEC_VERSION`

- Extending VkFormat:

  - VK_FORMAT_ASTC_3x3x3_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_3x3x3_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_3x3x3_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_4x3x3_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_4x3x3_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_4x3x3_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x3_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x3_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x3_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x4_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x4_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_4x4x4_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_5x4x4_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_5x4x4_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_5x4x4_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x4_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x4_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x4_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x5_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x5_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_5x5x5_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_6x5x5_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_6x5x5_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_6x5x5_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x5_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x5_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x5_UNORM_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x6_SFLOAT_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x6_SRGB_BLOCK_EXT

  - VK_FORMAT_ASTC_6x6x6_UNORM_BLOCK_EXT

- Extending VkStructureType:

  - VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TEXTURE_COMPRESSION_ASTC_3D_FEATURES_EXT

## Issues

None.

## Version History

- Revision 1, 2025-06-09 (Jan-Harald Fredriksen)

  - Initial version

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification.

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0