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[Bug 11431] should mention that .toDataURL() for image/jpeg acts as if the image was composited against black

From: <bugzilla@jessica.w3.org>
Date: Tue, 30 Nov 2010 01:20:12 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1PNEtA-0001OP-EL@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11431

Ian 'Hixie' Hickson <ian@hixie.ch> changed:

           What    |Removed                     |Added
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                 CC|                            |excors@gmail.com,
                   |                            |ian@hixie.ch

--- Comment #1 from Ian 'Hixie' Hickson <ian@hixie.ch> 2010-11-30 01:20:12 UTC ---
Actually mozilla and safari apparently don't do that, they instead
unpremultiply the colours. Either way, this needs speccing.

Philip, I'm told you have tests for this that may not match implementations?
Can you elaborate? Specifically, this one:
http://philip.html5.org/tests/canvas/suite/tests/toDataURL.jpeg.alpha.html

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Received on Tuesday, 30 November 2010 01:20:14 GMT

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