[Webkit-unassigned] [Bug 48138] New: texImage2D does not respect orientation of underlying image

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=48138

           Summary: texImage2D does not respect orientation of underlying
                    image
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dino at apple.com
                CC: cmarrin at apple.com


The image object passed to texImage2D might come from a source that has set a non-zero orientation. At the moment, the texImage2D implementation ignores this and calls the native method with the CGImage that the image object holds. This means if you load an image format that supports orientation, and the orientation is non-zero, then the texture will be using the wrong width and height.

CGImage doesn't know about orientation either, so the native call to texImage2D is doing the right thing. It's just that the higher level API of WebGL doesn't allow us to rotate the image - <img> elements have no concept of orientation.

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