# VkPhysicalDevice4444FormatsFeaturesEXT(3) Manual Page

## Name

VkPhysicalDevice4444FormatsFeaturesEXT - Structure describing additional 4444 formats supported by an implementation

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## C Specification

The `VkPhysicalDevice4444FormatsFeaturesEXT` structure is defined as:

    // Provided by VK_EXT_4444_formats
    typedef struct VkPhysicalDevice4444FormatsFeaturesEXT {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           formatA4R4G4B4;
        VkBool32           formatA4B4G4R4;
    } VkPhysicalDevice4444FormatsFeaturesEXT;

## Members

This structure describes the following features:

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `formatA4R4G4B4` indicates that the implementation must support using a VkFormat of `VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT` with at least the following VkFormatFeatureFlagBits:

  - `VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT`

  - `VK_FORMAT_FEATURE_BLIT_SRC_BIT`

  - `VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT`

- `formatA4B4G4R4` indicates that the implementation must support using a VkFormat of `VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT` with at least the following VkFormatFeatureFlagBits:

  - `VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT`

  - `VK_FORMAT_FEATURE_BLIT_SRC_BIT`

  - `VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT`

## Description

If the `VkPhysicalDevice4444FormatsFeaturesEXT` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. `VkPhysicalDevice4444FormatsFeaturesEXT` can also be used in the `pNext` chain of VkDeviceCreateInfo to selectively enable these features.

Valid Usage (Implicit)

- VUID-VkPhysicalDevice4444FormatsFeaturesEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT`

Note | Although the formats defined by the `VK_EXT_4444_formats` extension were promoted to Vulkan 1.3 as optional formats, the VkPhysicalDevice4444FormatsFeaturesEXT structure was not promoted to Vulkan 1.3.

## See Also

VK_EXT_4444_formats, VkBool32, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0