[Webkit-unassigned] [Bug 16171] [CAIRO] Canvas does not support globalAlpha

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=16171


vbs85 at gmx.de changed:

           What    |Removed                     |Added
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  Attachment #23080|0                           |1
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  Attachment #23088|                            |review?
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------- Comment #5 from vbs85 at gmx.de  2008-08-31 10:06 PDT -------
Created an attachment (id=23088)
 --> (https://bugs.webkit.org/attachment.cgi?id=23088&action=view)
Canvas globalAlpha

I use m_data to store the globalAlpha now but still had to use the getAlpha()
call in GraphicsContext.h to support globalAlpha in ImageCairo.cpp.
Otherwise globalAlpha wouldn't work on images (Canvas and HTML elements). I
took #if PLATFORM(CAIRO) to make sure that other platforms are not affected.

The globalAlpha implementation works for fill as well as stroke operations on
any sharp or image. With color, gradients and patterns.


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