[Webkit-unassigned] [Bug 220129] New: [ANGLE] Metal backend renders tdl.js samples as red

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220129

            Bug ID: 220129
           Summary: [ANGLE] Metal backend renders tdl.js samples as red
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kpiddington at apple.com
                CC: dino at apple.com

As reported by Ken Russell, TDL samples render a red background.

The root cause of this issue is an incorrect color mask for a texture blit. Instead of all channels being blitted, ANGLE tries to blit only the colors present specified by glColorMask
Blitting shouldn't be affected by the color mask.

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