[Webkit-unassigned] [Bug 233006] New: Regression: Missing textures on ios15

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Nov 11 11:32:11 PST 2021


            Bug ID: 233006
           Summary: Regression: Missing textures on ios15
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: akul at 8thwall.com
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

Created attachment 443983

  --> https://bugs.webkit.org/attachment.cgi?id=443983&action=review

ios15, missing texture (middle of the field is black)

Referencing the original issue from here: https://discourse.threejs.org/t/textures-in-gltf-sometimes-display-black-but-only-on-ios/30520/2

Repo app:

iOS14: Works as expected, all three textures are loaded

iOS15.0.2 / iOS15.2: [regression] 
Behavior 1) Missing textures (ie one or more of the textures is black).
Behavior 2) Page reloads or crashes (potential memory issue)
Behavior 3) It should also be noted that it takes a significantly longer time to load the textures on iOS15 vs iOS14

Tested with these combinations with the same effect: [GPU Process: WebGL, GPU Process: Canvas Rendering, WebGL via Metal, WebGL 2.0]
Another example of this issue: https://discourse.threejs.org/t/missing-textures-on-safari-ios15/30245

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