[Webkit-unassigned] [Bug 156945] New: [CG] REGRESSION (r198782): CGImageSourceCopyPropertiesAtIndex() is called twice when calculating the size of an Image

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156945

            Bug ID: 156945
           Summary: [CG] REGRESSION (r198782):
                    CGImageSourceCopyPropertiesAtIndex() is called twice
                    when calculating the size of an Image
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com

Prior to change r198782, ImageSource was actually the decoder. ImageSource::frameSizeAtIndex() was calculating the size without calling ImageSource::orientationAtIndex(). Instead it was making a single call to CGImageSourceCopyPropertiesAtIndex() and it was using the returned properties to calculate the size and the orientation. Currently ImageSource::frameSizeAtIndex() calls ImageDecoder::frameSizeAtIndex() and ImageDecoder::orientationAtIndex(). Each of these functions makes a call to CGImageSourceCopyPropertiesAtIndex().

Notice: To get the size of an image, BitmapImage::updateSize() calls ImageSource::size() and ImageSource::sizeRespectingOrientation(). Each of these functions calls ImageSource::frameSizeAtIndex(0).-

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