Bug 261187

Summary:	[TextureMapper] Do texture transformation in vertex shader when copying texture
Product:	WebKit	Reporter:	Akihiro Kiuchi <aki.develop8128>
Component:	Platform	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Akihiro Kiuchi 2023-09-05 18:21:24 PDT

This is a sub issue of Bug231653, and caused from Bug261101 

Now when copying texture in TextureMapperGL, we are using `u_textureCopyMatrix` uniform variable to transform texture coordinate in fragment shader.

But doing texture transformation in fragment shader is costy, and there is another suitable uniform variable `u_textureSpaceMatrix` to do texture transformation in vertex shader.

Comment 1 Akihiro Kiuchi 2023-09-05 20:12:52 PDT

Pull request: https://github.com/WebKit/WebKit/pull/17469

Comment 2 EWS 2023-09-06 13:09:32 PDT

Committed 267687@main (14f7f3375957): <https://commits.webkit.org/267687@main>

Reviewed commits have been landed. Closing PR #17469 and removing active labels.

Comment 3 Radar WebKit Bug Importer 2023-09-06 13:10:15 PDT

<rdar://problem/115072414>