[whatwg] Canvas: compositing and blending operator as enumeration?

Dirk Schulze dschulze at adobe.com
Wed Jan 9 22:36:59 PST 2013

On Jan 9, 2013, at 9:29 PM, "Rik Cabanier" <cabanier at gmail.com<mailto:cabanier at gmail.com>> wrote:

Hi Dirk,

the 'globalCompositeOperation' property takes the same syntax as the css 'mix' so I don't think an enum will work.

I am not following. What does the CSS property have to do with the canvas attribute?



On Wed, Jan 9, 2013 at 6:18 PM, Dirk Schulze <dschulze at adobe.com<mailto:dschulze at adobe.com>> wrote:

After all the discussions about winding rules and the new introduced enumeration for "nonzero" and "even odd", I wonder if the the compositing and blending modes should be two enumerations as well.

enum CanvasCompositingMode {


enum CanvasBlendingMode {

This wouldn't actually change the behavior or definition a lot, but might help to cleanup a bit. I am happy about other names if they are not good enough.


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