[Webkit-unassigned] [Bug 65033] New: [CG] Support frameHasAlphaAtIndex for image types other than JPEG

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65033

           Summary: [CG] Support frameHasAlphaAtIndex for image types
                    other than JPEG
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com
                CC: mdelaney at apple.com


We only return false form frameHasAlphaAtIndex() for JPEG images. PNG and GIF images are treated as having alpha even when they do not.

frameHasAlphaAtIndex() will be the basis for various painting optimizations, so it would be good to fix this.

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