[Webkit-unassigned] [Bug 247036] New: IOSurface size limit in the web content process is 1024x1024

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247036

            Bug ID: 247036
           Summary: IOSurface size limit in the web content process is
                    1024x1024
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Sandboxing causes `IOSurfaceGetPropertyMaximum(kIOSurfaceWidth)` to fail, so we fall back to a maximum IOSurface size of 1024x1024 here:

static IntSize computeMaximumSurfaceSize()
{
#if PLATFORM(IOS)
    return maxSurfaceDimensionCA();
#else
    IntSize maxSize(clampToInteger(IOSurfaceGetPropertyMaximum(kIOSurfaceWidth)), clampToInteger(IOSurfaceGetPropertyMaximum(kIOSurfaceHeight)));

    // Protect against maxSize being { 0, 0 }.
    constexpr int maxSurfaceDimensionLowerBound = 1024;

    return maxSize.constrainedBetween({ maxSurfaceDimensionLowerBound, maxSurfaceDimensionLowerBound }, maxSurfaceDimensionCA() );
#endif
}

Not sure why the iOS code is different.

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