RESOLVED FIXED 156488
putImageData needs to premultiply input 
https://bugs.webkit.org/show_bug.cgi?id=156488
Summary putImageData needs to premultiply input
Dean Jackson
Reported 2016-04-11 19:43:52 PDT
I made a mistake in r187534, where I updated putImageData to use the Accelerate framework. The iOS path accidentally unpremultiplied the incoming data, rather than premultiplying it.
Attachments
Patch (4.94 KB, patch)
2016-04-11 19:49 PDT, Dean Jackson 		zalan: review+
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2016-04-11 19:44:17 PDT
<rdar://problem/25672675>
Dean Jackson
Comment 2 2016-04-11 19:45:11 PDT
<rdar://problem/23119884>
Dean Jackson
Comment 3 2016-04-11 19:49:08 PDT
Created attachment 276201 [details] Patch
Jon Lee
Comment 4 2016-04-11 19:51:28 PDT
What's the impact on the Animometer Images test?
Dean Jackson
Comment 5 2016-04-11 19:52:36 PDT
(In reply to comment #4) > What's the impact on the Animometer Images test? Should be zero. We're still doing the same sets of operations, just multiplying rather than dividing. And this is iOS only.
Dean Jackson
Comment 6 2016-04-11 19:57:26 PDT
Committed r199330: <http://trac.webkit.org/changeset/199330>
Note You need to log in before you can comment on or make changes to this bug.