[Webkit-unassigned] [Bug 227633] New: [macOS] Only use WebGL on Metal by default on safe versions of macOS.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227633

            Bug ID: 227633
           Summary: [macOS] Only use WebGL on Metal by default on safe
                    versions of macOS.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

Some older supported macOS releases have a version of Metal that does not work properly for implementing WebGL features. We should stick to the OpenGL backend on those releases (by default) and only activate Metal WebGL on systems we know pass all tests.

Users can still activate WebGL on Metal if they wish, but it will not be the default behavior.

<rdar://problem/78527887>

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