VK_EXT_rgba10x6_formats

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′C_BC_R 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