[Webkit-unassigned] [Bug 116616] New: [BlackBerry] backface-visibility: hidden doesn't work properly with masks and filters

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed May 22 07:20:20 PDT 2013


https://bugs.webkit.org/show_bug.cgi?id=116616

           Summary: [BlackBerry] backface-visibility: hidden doesn't work
                    properly with masks and filters
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit BlackBerry
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: anilsson at rim.com
                CC: xan.lopez at gmail.com, jpetsovits at blackberry.com,
                    cgarcia at igalia.com, anlo at rim.com


When we switched from Skia to BlackBerry::Platform::Graphics::GraphicsContext, we switched the winding order for culling, since the BB::P::G::GC uses clockwise geometry and requires glFrontFace(GL_CW). However, masks and filters still use counterclockwise geometry as we used to do with Skia. So they get erroneously culled out when -webkit-backface-visibility: hidden is applied.

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