# VK_EXT_rgba10x6_formats(3) Manual Page

## Name

VK_EXT_rgba10x6_formats - device extension

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## Registered Extension Number

345

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

VK_KHR_sampler_ycbcr_conversion
or
Vulkan Version 1.1

## Contact

- Jan-Harald Fredriksen [GitHub]janharaldfredriksen-arm

## Other Extension Metadata

Last Modified Date

  2021-09-29

IP Status

  No known IP claims.

Contributors

  - Jan-Harald Fredriksen, Arm

  - Graeme Leese, Broadcom

  - Spencer Fricke, Samsung

## Description

This extension enables the `VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16` format to be used without a sampler Y′CBCR conversion enabled.

## New Structures

- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:

  - VkPhysicalDeviceRGBA10X6FormatsFeaturesEXT

## New Enum Constants

- `VK_EXT_RGBA10X6_FORMATS_EXTENSION_NAME`

- `VK_EXT_RGBA10X6_FORMATS_SPEC_VERSION`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RGBA10X6_FORMATS_FEATURES_EXT`

## Issues

1) Should we reuse the existing format enumeration or introduce a new one?

RESOLVED: We reuse an existing format enumeration, `VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16`, that was previously exclusively used for YCbCr and therefore had a set of limitations related to that usage. The alternative was to introduce a new format token with exactly the same bit representation as the existing token, but without the limitations.

2) Should we only introduce `VK_FORMAT_R10X6G10X6B10X6A10X6_UNORM_4PACK16` or also 1-3 component variations?

RESOLVED: Only the 4-component format is introduced because the 1- and 2- component variations are already not exclusive to YCbCr, and the 3-component variation is not a good match for hardware capabilities.

## Version History

- Revision 1, 2021-09-29 (Jan-Harald Fredriksen)

  - Initial EXT 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0