Bug 241511

Summary:	WebGLRenderingContextBase::clearIfComposited must preserve indexed color write masks
Product:	WebKit	Reporter:	Alexey Knyazev <lexa.knyazev>
Component:	WebGL	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	dino, kbr, kkinnunen, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Alexey Knyazev 2022-06-10 05:06:05 PDT

When OES_draw_buffers_indexed is enabled, clearIfComposited must not change color write masks for non-zero draw buffers and it must properly restore the original mask upon completion.

Comment 1 EWS 2022-06-13 02:56:01 PDT

Committed r295485 (251490@main): <https://commits.webkit.org/251490@main>

Reviewed commits have been landed. Closing PR #1444 and removing active labels.

Comment 2 Radar WebKit Bug Importer 2022-06-13 02:57:13 PDT

<rdar://problem/95004046>