[Webkit-unassigned] [Bug 230107] [WebGL2, Safari 15 - iOS15] Problems with drawElements in some conditions

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Sep 10 12:58:24 PDT 2021


--- Comment #5 from Kenneth Russell <kbr at google.com> ---
Thanks so much Kimmo for investigating and confirming.

Do you think you might be able to take this bug since only someone from Apple can really debug it? Do you think it's something ANGLE's Metal backend is doing wrong and that's the cause of the command buffer execution error?

The vertex and element array buffers in this example are being allocated with DYNAMIC_DRAW. UNSIGNED_SHORT indices are being used. All of the data is zeroed out, so all of the triangles being drawn are degenerate. (All zero indices, all 0.0 vertices.)

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