[Webkit-unassigned] [Bug 21575] Cairo's ImageBuffer::getImageData() does not handle alpha=0 case correctly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=21575





------- Comment #5 from vbs85 at gmx.de  2008-10-29 15:55 PDT -------
Created an attachment (id=24758)
 --> (https://bugs.webkit.org/attachment.cgi?id=24758&action=view)
color's given to GraphicsContext

I checked the color that are given to GraphicsContext. I added the original
alpha value on fist column and the second column includes the alpha multiplied
with 255.
As you can see (if you compare the values of the first list with the values of
the second list): cairo gives the right values back (for the alpha channel).

That means first: There is something wrong in Color.cpp
and second: it shouldn't work on Cg either.


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