[Webkit-unassigned] [Bug 232413] New: [GPU Process] Introduce FilterFunction and make it the base class of Filter and FilterEffect

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232413

            Bug ID: 232413
           Summary: [GPU Process] Introduce FilterFunction and make it the
                    base class of Filter and FilterEffect
           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

CSSFilter is composed of a sequence of <filter-function>. It can be defined as:

filter: <filter-function> [<filter-function>]* | none

The <filter-function> can be 'blur', 'brightness', ... etc. Or it can be 'url("filters.svg#filter-id")'. See https://developer.mozilla.org/en-US/docs/Web/CSS/filter.

So it make sense to introduce the same kind of layering in the filters code.

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