[Webkit-unassigned] [Bug 43476] New: mask-box-image renders wrong in certain conditions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=43476

           Summary: mask-box-image renders wrong in certain conditions
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kimmo.kotajarvi at nomovok.com


Created an attachment (id=63434)
 --> (https://bugs.webkit.org/attachment.cgi?id=63434)
Test html + three PNGs

When using -webkit-mask-box-image with a 64x64px and 32, 32, 32, 32 corner size, some bad stretching can be seen. See attached screenshot. If the sizes are made 32, 31, 32, 32, no stretching happens. Other image and corner sizes trigger the problem as well, the key factor seems to be that left and right edges are exactly half of the image size.

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