VK_EXT_4444_formats

Other Extension Metadata

Last Modified Date

2020-07-28

IP Status

No known IP claims.

Contributors

• Joshua Ashton, Valve
• Faith Ekstrand, Intel

Description

This extension defines the VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT and VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT formats which are defined in other current graphics APIs.

This extension may be useful for building translation layers for those APIs or for porting applications that use these formats without having to resort to swizzles.

When VK_EXT_custom_border_color is used, these formats are not subject to the same restrictions for border color without format as with VK_FORMAT_B4G4R4A4_UNORM_PACK16.

New Structures

• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDevice4444FormatsFeaturesEXT

New Enum Constants

• VK_EXT_4444_FORMATS_EXTENSION_NAME
• VK_EXT_4444_FORMATS_SPEC_VERSION
• Extending VkFormat:
  • VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT
  • VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT

Promotion to Vulkan 1.3

This extension has been partially promoted. The format enumerants introduced by the extension are included in core Vulkan 1.3, with the EXT suffix omitted. However, runtime support for these formats is optional in core Vulkan 1.3, while if this extension is supported, runtime support is mandatory. The feature structure is not promoted. The original enum names are still available as aliases of the core functionality.

Version History

• Revision 1, 2020-07-04 (Joshua Ashton)
  • Initial draft