[Webkit-unassigned] [Bug 38385] New: REGRESSION: RenderPath does not handle repaints correctly anymore if bounds changed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38385

           Summary: REGRESSION: RenderPath does not handle repaints
                    correctly anymore if bounds changed
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zimmermann at kde.org
                CC: bdakin at apple.com, staikos at kde.org, krit at webkit.org


Unfortunately we're still missing a good testcase, if the bounds of an object
change from "bigger" to "smaller", eg. changing the stroke-width of an rect
from 20 to 1.
So this regression was not noticed. I have a fix with a testcase that's broken
on trunk and fixed with my patch.

As side effect the caching of the repaint/object/stroke bounds is simplified -
we even save a FloatRect per RenderPath.
Overall this is another huge performance benefit :-)

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