[Webkit-unassigned] [Bug 256333] New: [GPU Process][Filters] Make SVGFilter own a vector of unique FilterEffects

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256333

            Bug ID: 256333
           Summary: [GPU Process][Filters] Make SVGFilter own a vector of
                    unique FilterEffects
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Currently SVGFilter owns a SVGFilterExpression which is a Vector of SVGFilterExpressionTerm. The SVGFilterExpressionTerm holds a Ref<FilterEffect> which maybe referenced more than once by multiple SVGFilterExpressionTerms.

We need make SVGFilter own a Vector of unique FilterEffects. SVGFilterExpressionTerm will hold an index to this Vector. This will allow building an SVGFilterTransaction which is a set of altered unique FilterEffects identified by the index in the vector of unique FilterEffects of SVGFilter.

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