# VK_EXT_4444_formats(3) Manual Page

## Name

VK_EXT_4444_formats - device extension

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## Registered Extension Number

341

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

VK_KHR_get_physical_device_properties2
or
Vulkan Version 1.1

## Deprecation State

- Promoted to Vulkan 1.3

## Contact

- Joshua Ashton [GitHub]Joshua-Ashton

## 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

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

## 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