NEW 114340
Opacity might have different effect when using composited layers 
https://bugs.webkit.org/show_bug.cgi?id=114340
Summary Opacity might have different effect when using composited layers
Noam Rosenthal
Reported 2013-04-10 01:08:16 PDT
This is apparent when running composited/non-composited ref-tests, like the ones in compositing/overlap-blending.
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Simon Fraser (smfr)
Comment 1 2013-04-10 11:24:07 PDT
Can you be more specific?
Noam Rosenthal
Comment 2 2013-04-10 14:18:56 PDT
(In reply to comment #1) > Can you be more specific? I tried running LayoutTests/compositing/overlap-blending/nested-overlap.html as a ref test on Mac-wk2, and it had failed. I opened the two results in Safari and the green looks slightly different. Is that a CA color profile issue or a blending issue? I'm not really an expert on CA but seems like this ref-test should work on Mac.
Simon Fraser (smfr)
Comment 3 2013-04-10 15:44:49 PDT
Ah, that's a CA colorspace issue, yes, as recently discussed in webkit-dev
Noam Rosenthal
Comment 4 2013-04-10 22:05:01 PDT
(In reply to comment #3) > Ah, that's a CA colorspace issue, yes, as recently discussed in webkit-dev Alright. Is there an existing bug report, so we can mark this as duplicate? Otherwise we should resolve with WONTFIX or something.
Simon Fraser (smfr)
Comment 5 2013-04-10 23:13:13 PDT
I think there's a bug about a bunch of the background-color compositing ref tests failing, but I can't find it.
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