[Webkit-unassigned] [Bug 52041] New: Can ask for a bitmap that is too large when accelerated compositing and tiling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52041

           Summary: Can ask for a bitmap that is too large when
                    accelerated compositing and tiling
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: cmarrin at apple.com


When running compositing/tiling/huge-layer-with-layer-children.html we ask for a bitmap that is 500 by 20000, which is too large and the creation fails. This hits an assert in GraphicsContextCGWin::CGContextWithHDC because bmBitsPixel is zero. But this seems benign, so for now I added a graceful exit rather than the assert. But we should understand why we're going down this path.

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