On Sun, Nov 11, 2012 at 9:52 PM, Dirk Schulze <k...@webkit.org> wrote:
> > > On Sunday, November 11, 2012, Rik Cabanier wrote: > >> >> >> On Sun, Nov 11, 2012 at 8:43 PM, Maciej Stachowiak <m...@apple.com> wrote: >> >>> >>> On Nov 11, 2012, at 6:59 PM, Rik Cabanier <caban...@gmail.com> wrote: >>> >>> >>> >>> >>>> >>>> Wouldn't it be better to add a new property to canvas for blending? At >>>> the beginning, implementations are just require to use different blend >>>> modes in combination with 'source-over'. >>> >>> >>> That could work too. >>> There was a mailing list conversation about this a couple of months ago, >>> and people were evenly split on the subject. >>> >>> The vast majority of cases will use 'source-over' in combination with >>> blending so maybe it's best to keep it simple... >>> >>> >>> It doesn't make sense to me for blend mode and composite operator to be >>> separate in CSS, but combined in Canvas. Either there are valid use cases >>> for specifying them separately or there are not. I cannot imagine how this >>> could differ between Canvas and CSS. >>> >> > To be fair, the 'globalCompositOperator' property mixed the compositing > modes with some blend modes already. Which is the fault of the WebKit > implementation. IIRC they have been removed from the Canvas part of the > HTML spec for some time, but were added later again. Now we have multiple > independent implementations that support all currently specified operators. > Is this the 'darker' compositing mode or are there others?
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