[Webkit-unassigned] [Bug 243741] New: [Filters] Move the static calculateOutsets functions to the FilterOperation classes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243741

            Bug ID: 243741
           Summary: [Filters] Move the static calculateOutsets functions
                    to the FilterOperation classes
           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

The CSS FilterOperations have a hierarchy of base and super classes. Instead of having static calculateOutsets functions in CSSFilter.cpp for every FilterOperation we can make them virtual functions and call them through the base class FilterOperation. The only exception is ReferenceFilterOperation which requires access to the renderer and the filterElement. Accessing these classes from a platform file is a layering violation. So we still need to call calculateReferenceFilterOutsets() from CSSFilter::calculateOutsets() as a special case.

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