[Webkit-unassigned] [Bug 98989] New: [CSS Shaders] Add CustomFilterRenderer to reuse this class by Accelerated Compositing.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98989

           Summary: [CSS Shaders] Add CustomFilterRenderer to reuse this
                    class by Accelerated Compositing.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: luxtella at company100.net


Extract CustomFilterRenderer class from the rendering part of FECustomFilter. FECustomFilter now plays a role in extending FilterEffect and delegates rendering css shaders to CustomFilterRenderer.

CustomFilterRenderer does not know Filter and FilterEffect. We can create a CustomFilterRenderer instance with only CustomFilterGlobalContext and CustomFilterOperation. It means that Accelerated Compositing can create the CustomFilterRenderer instance if Accelerated Compositing has CustomFilterGlobalContext and CustomFilterOperation, and it is possible if we refactor CustomFilterGlobalContext little.

This patch prepares to enable CSS Shaders on Accelerated Compositing.

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