[Webkit-unassigned] [Bug 216915] New: Test WebGL draw video to canvas software path on iOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=216915

            Bug ID: 216915
           Summary: Test WebGL draw video to canvas software path on iOS
           Product: WebKit
           Version: Other
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kkinnunen at apple.com
                CC: dino at apple.com
        Depends on: 215908
            Blocks: 198948

Test WebGL draw video to canvas software path on iOS

In bug 215908 we had a regression where webgl texImage2D with video did not produce output.
The problem was that GPU YUV->RGB codepath had a bug.
However, the software conversion codepath should have taken effect, but in fact just produced transparent texture.
Interestingly normal "MP4" file worked, where as a HLS stream did not. It's unsure if this is a factor.

The problem should have been caught with simulator testing and/or real hardware testing.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=198948
[Bug 198948] Meta: use ANGLE as the backend for WebKit's WebGL implementation
https://bugs.webkit.org/show_bug.cgi?id=215908
[Bug 215908] REGRESSION: Textures Fail to Render in WebGL from HLS Stream [iOS 14]
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