[Webkit-unassigned] [Bug 119690] New: [CSS Shapes] Eliminate GraphicsContext3D::ImageExtractor dependency

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=119690

           Summary: [CSS Shapes] Eliminate
                    GraphicsContext3D::ImageExtractor dependency
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: giles_joplin at yahoo.com
            Blocks: 116643


The reviewer for bug 116643 had asked for the GraphicsContext3D dependency in Shapes.cpp to be removed.

The original plan was to refactor GraphicsContext3D::ImageExtractor et al, to remove its dependency on the rest of the WebGL code. See: 

The new plan is to render the shape's StyleImage instead: https://bugs.webkit.org/show_bug.cgi?id=119634

Use ImageBuffer::create() to create an ImageBuffer of the right size.
Draw the Image* with the GraphicsContext returned by imageBuffer->context().
Use ImageBuffer::getUnmultipliedImageData() to extract the RGBA pixels data.

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