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RESOLVED FIXED
140646
Support "plus-darker" in mix-blend mode
https://bugs.webkit.org/show_bug.cgi?id=140646
Summary
Support "plus-darker" in mix-blend mode
Dean Jackson
Reported
2015-01-19 16:33:00 PST
Support for "plus-darker" in mix-blend-mode. Here is the email I sent to public-fx.
https://lists.w3.org/Archives/Public/public-fx/2015JanMar/0021.html
Our designers at Apple often request a blending operation that is not supported in the CSS Compositing and Blending specification: plus-darker. You can find many examples and discussion of this mode if you Bing on the Google. We’d like to add this mode to Level 2. Details are here:
http://en.wikipedia.org/wiki/Blend_modes#Addition
The math is pretty simple: R = min(0, (1 - D) + (1 - S)) (We should maybe consider adding plus-lighter as well, and subtractive modes based on designer feedback)
Attachments
Patch
(1.18 MB, patch)
2015-01-19 17:45 PST
,
Dean Jackson
simon.fraser
: review+
Details
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proposed patch, testcase, etc.
Dean Jackson
Comment 1
2015-01-19 16:33:12 PST
rdar://problem/19523370
Dean Jackson
Comment 2
2015-01-19 17:45:27 PST
Created
attachment 244946
[details]
Patch
Dean Jackson
Comment 3
2015-01-20 08:04:06 PST
Committed
r178710
: <
http://trac.webkit.org/changeset/178710
>
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