[Webkit-unassigned] [Bug 124653] New: [texmap] Borders on rotating images are hidden/wrongly rendered with edge distance antialiasing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=124653

           Summary: [texmap] Borders on rotating images are hidden/wrongly
                    rendered with edge distance antialiasing
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jdapena at igalia.com


Created an attachment (id=217424)
 --> (https://bugs.webkit.org/attachment.cgi?id=217424&action=review)
Test case: rotating green box and circle are most obvious artifacts

When TextureMapperGL has enabled edgeDistanceAntialiasing, the borders of the image fail to render properly, showing different artifacts. It is pretty obvious on circle images where the borders of the circle are exactly touching the image border.

This is reproducible at least in WebKit Qt and WebKit Gtk (though I expect it to also fail on WebKitEFL as it uses coordinated graphics).

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