[webkit-dev] Adding blending mode to WebKit canvas

Maciej Stachowiak mjs at apple.com
Sun Nov 11 20:43:46 PST 2012

On Nov 11, 2012, at 6:59 PM, Rik Cabanier <cabanier at 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.


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