[Webkit-unassigned] [Bug 90037] New: CSS3 calc: optimise blending expression

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90037

           Summary: CSS3 calc: optimise blending expression
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mikelawther at chromium.org


As suggested by Tony on https://webkit.org/b/86160, the blending expressions generated by transitions involving calc can be improved. Currently they involve 7 allocations.

Mike said "An alternative I considered was to introduce a new type of expression node that was a BlendNode - then you'd only need to alloc one of them [...]

Another thing I could do is if one of from or to is not an expression, to multiply that with its progress to eliminate some nodes. It would still mean allocating a new Length though."

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