# VK_IMG_format_pvrtc(3) Manual Page

## Name

VK_IMG_format_pvrtc - device extension

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## Registered Extension Number

55

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

None

## Deprecation State

- Deprecated without replacement

## Contact

- Stuart Smith

## Other Extension Metadata

Last Modified Date

  2019-09-02

IP Status

  Imagination Technologies Proprietary

Contributors

  - Stuart Smith, Imagination Technologies

## Description

`VK_IMG_format_pvrtc` provides additional texture compression functionality specific to Imagination Technologies PowerVR Texture compression format (called PVRTC).

Note | As also noted in the Khronos Data Format Specification, PVRTC1 images must have dimensions that are a power of two.

## Deprecation

Both PVRTC1 and PVRTC2 are slower than standard image formats on PowerVR GPUs, and support will be removed from future hardware.

## New Enum Constants

- `VK_IMG_FORMAT_PVRTC_EXTENSION_NAME`

- `VK_IMG_FORMAT_PVRTC_SPEC_VERSION`

- Extending VkFormat:

  - `VK_FORMAT_PVRTC1_2BPP_SRGB_BLOCK_IMG`

  - `VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG`

  - `VK_FORMAT_PVRTC1_4BPP_SRGB_BLOCK_IMG`

  - `VK_FORMAT_PVRTC1_4BPP_UNORM_BLOCK_IMG`

  - `VK_FORMAT_PVRTC2_2BPP_SRGB_BLOCK_IMG`

  - `VK_FORMAT_PVRTC2_2BPP_UNORM_BLOCK_IMG`

  - `VK_FORMAT_PVRTC2_4BPP_SRGB_BLOCK_IMG`

  - `VK_FORMAT_PVRTC2_4BPP_UNORM_BLOCK_IMG`

## Version History

- Revision 1, 2019-09-02 (Stuart Smith)

  - 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0