[Webkit-unassigned] [Bug 277484] New: [TexMap][Nicosia] Incorrect damage information produced for animations with blur

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=277484

            Bug ID: 277484
           Summary: [TexMap][Nicosia] Incorrect damage information
                    produced for animations with blur
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Compositing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: plampe at igalia.com
                CC: simon.fraser at apple.com

Created attachment 472031

  --> https://bugs.webkit.org/attachment.cgi?id=472031&action=review

animation-blur-slow.html

When running animation-blur-slow.html demo using GTK port with some log instrumentation, one can see the damage information is constantly empty after few frames:
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(0,0,2560,1357)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(0,0,2560,1357)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)

Moreover, when running animation-blur-fast.html demo the same way, one can observe the damage information that is too small (should be larger than 100x100):
LayerTreeHost::didRenderFrame(): damage - isEmpty():1, isInvalid():0, rects#:0, bounds:(0,0,0,0)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(0,0,2560,1357)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(0,0,2560,1357)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)
LayerTreeHost::didRenderFrame(): damage - isEmpty():0, isInvalid():0, rects#:1, bounds:(1230,100,100,100)

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