[Webkit-unassigned] [Bug 72700] New: [CSSShaders] The mesh attributes have no "attached" identifier in the computed style

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72700

           Summary: [CSSShaders] The mesh attributes have no "attached"
                    identifier in the computed style
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: https://dvcs.w3.org/hg/FXTF/raw-file/tip/custom/index.
                    html
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: achicu at adobe.com
            Blocks: 71446


There's no "attached" identifier in the specification of the shaders. In order to be verbose when calculating the computed style we need an "attached" identifier. Verbose mode means that even if the default mode is "attached", we will have an "attached" identifier in the output of the computed style.

Adding this bug to make sure an "attached" mode is added to the spec, OR remove the comment in the code saying that the computed style will not contain any "attached" identifier.

example:
-webkit-filter: custom(url(vertex), 10) 
should compute to 
-webkit-filter: custom(url(vertex) none, 10 10 attached)

Currently, we cannot compute to the string with "attached", because accordingly to the spec it is not a valid syntax.

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