[Bug 27464] New: Resolving units when filterUnits="objectBoundingBox"


            Bug ID: 27464
           Summary: Resolving units when filterUnits="objectBoundingBox"
           Product: CSS
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Filter Effects
          Assignee: dino@apple.com
          Reporter: ed@opera.com
        QA Contact: public-css-bugzilla@w3.org
                CC: cmarrin@apple.com, eoconnor@apple.com, smfr@me.com

http://www.w3.org/TR/filter-effects-1/#FilterUnitsAttribute says:

"If filterUnits is equal to objectBoundingBox, then x, y, width, height
represent fractions or percentages of the bounding box on the referencing
element (see object bounding box units)."

Now, if we take an example of a valid <length> for the x attribute, say "47em",
how should that be interpreted in the case of filterUnits="objectBoundingBox"?

I think the author's expection might be that 47em is kept as just that, but
actually what happens is that it gets computed into user units and then taken
as a fraction of the boundingbox.

Therefore I'd like to ask that the behavior is clarified such that it becomes
more obvious that this happens.

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Received on Friday, 28 November 2014 12:22:08 UTC