1// Copyright 2020-2022 The Khronos Group Inc. 2// 3// SPDX-License-Identifier: CC-BY-4.0 4 5include::{generated}/meta/{refprefix}VK_EXT_4444_formats.adoc[] 6 7=== Other Extension Metadata 8 9*Last Modified Date*:: 10 2020-07-28 11*Interactions and External Dependencies*:: 12 - Promoted to Vulkan 1.3 Core 13*IP Status*:: 14 No known IP claims. 15*Contributors*:: 16 - Joshua Ashton, Valve 17 - Jason Ekstrand, Intel 18 19=== Description 20 21This extension defines the ename:VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT and 22ename:VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT formats which are defined in other 23current graphics APIs. 24 25This extension may be useful for building translation layers for those APIs 26or for porting applications that use these formats without having to resort 27to swizzles. 28 29When VK_EXT_custom_border_color is used, these formats are not subject to 30the same restrictions for border color without format as with 31VK_FORMAT_B4G4R4A4_UNORM_PACK16. 32 33include::{generated}/interfaces/VK_EXT_4444_formats.adoc[] 34 35=== Promotion to Vulkan 1.3 36 37This extension has been partially promoted. 38The format enumerants introduced by the extension are included in core 39Vulkan 1.3, with the EXT suffix omitted. 40However, runtime support for these formats is optional in core Vulkan 1.3, 41while if this extension is supported, runtime support is mandatory. 42The feature structure is not promoted. 43The original enum names are still available as aliases of the core 44functionality. 45 46=== Version History 47 48 * Revision 1, 2020-07-04 (Joshua Ashton) 49 ** Initial draft 50