[Webkit-unassigned] [Bug 200726] New: [iOS](REGRESSION: r200487): Get the CGImage pixels by drawing it into a memory context

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200726

            Bug ID: 200726
           Summary: [iOS](REGRESSION: r200487): Get the CGImage pixels by
                    drawing it into a memory context
           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

The API test WebKit.RequestActivatedElementInfoForRotatedImage has been failing on iOS 13. It fails because it gets the image pixels by copying the data of the image data provider. I mistakenly was assuming that the data provider has to be point directly to pixels data which is not necessarily true. The iOS 13 underlying components have changed such that the data provider is not an array of the pixels' colors anymore.

To get the pixels as an array of colors, the image should be drawn to a memory context instead. Then the backing memory buffer can be accessed to get the image pixels' colors.

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