Bug 256721

Summary:	[WebGPU] Initial WGSL support for texture_external
Product:	WebKit	Reporter:	Mike Wyrzykowski <mwyrzykowski>
Component:	WebGPU	Assignee:	Tadeu Zagallo <tzagallo>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Mike Wyrzykowski 2023-05-12 10:45:19 PDT

WGSL support for texture_external: https://gpuweb.github.io/gpuweb/wgsl/#external-texture-type

In order to support this, use of "texture_external nameForT" will likely need to generate the following information in the argument buffer at a minimum:

texture2d<half> nameForT_FirstPlane;
texture2d<half> nameForT_SecondPlane;
float3x3 nameForT_UVRemapMatrix;
float4x3 nameForT_ColorSpaceConversionMatrix;


texture_external can only be used with textureLoad or textureSampleBaseClampToEdge. I will write up separate issues for those.

Comment 1 Radar WebKit Bug Importer 2023-05-12 10:45:43 PDT

<rdar://problem/109270814>

Comment 2 Tadeu Zagallo 2023-05-15 07:18:59 PDT

Pull request: https://github.com/WebKit/WebKit/pull/13878

Comment 3 EWS 2023-05-17 00:28:40 PDT

Committed 264138@main (030158c424b9): <https://commits.webkit.org/264138@main>

Reviewed commits have been landed. Closing PR #13878 and removing active labels.