Registered Extension Number

345

Revision

1

Ratification Status

Not ratified

Extension and Version Dependencies

VK_KHR_sampler_ycbcr_conversion
or
Version 1.1

Contact

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

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