[Webkit-unassigned] [Bug 281763] New: Webgl via metal on iOS breaks fbo / offscreen canvas on older hardware

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=281763

            Bug ID: 281763
           Summary: Webgl via metal on iOS breaks fbo / offscreen canvas
                    on older hardware
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: webkit at heavypoly.com
                CC: djg at apple.com, kbr at google.com, kkinnunen at apple.com

This example is broken on certain iOS hardware
https://twgljs.org/examples/offscreencanvas.html

Examples using fbo feature break
https://regl-project.github.io/regl/www/gallery.html


1st gen ipad pro 12.9"
model A1584

ipadOS 17.7
ipadOS 16.7.10 also broken

When webgl via metal flag is turned off in iOS safari settings, it works.

On newer iPad (M1 ipad pro) all the examples work.

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