[Bug 21199] Add blend modes to Canvas' globalCompositeOperation

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21199

rcabanie <cabanier@adobe.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Add blend modes to Canvas   |Add blend modes to Canvas'
                   |                            |globalCompositeOperation

--- Comment #1 from rcabanie <cabanier@adobe.com> ---
The spec (http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas/#compositing)
currently defines the set of porter-duff compositing operators.

There is a new specificiation
(https://dvcs.w3.org/hg/FXTF/rawfile/default/compositing/index.html#canvascompositingandblending)
that extends this flag so you can also specify a blending operation.
The canvas spec should be updated with the new blend modes and a reference to
the compositing spec. Alternately, the canvas spec could remove the description
of globalCompositeOperation and just refer to the compositing for its
definition.

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Received on Tuesday, 5 March 2013 18:57:17 UTC