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Bug 169622 - (Re)add support for alpha blended xft rendering
(Re)add support for alpha blended xft rendering
Product: pango
Classification: Platform
Component: general
Other Linux
: Normal enhancement
: ---
Assigned To: pango-maint
Depends on:
Reported: 2005-03-08 16:31 UTC by Mikael Magnusson
Modified: 2005-06-21 16:26 UTC
See Also:
GNOME target: ---
GNOME version: ---

second version of the patch (2.12 KB, patch)
2005-03-08 16:32 UTC, Mikael Magnusson
none Details | Review
Patch I'm applying (3.12 KB, patch)
2005-06-21 16:21 UTC, Owen Taylor
none Details | Review

Description Mikael Magnusson 2005-03-08 16:31:07 UTC
The alpha component of xft colors are ignored since pango 1.8.0, here is a patch
to unignore them again. The patch is possibly not correct according to owen on
irc, but here it goes. Current version of the patch tries to reset the alpha,
but does in the wrong place, only the first run gets the correct alpha.

17:13:46 <owen> you need to restore the alpha to 0xffff after rendering
17:28:01 <owen> Mikachu: Maybe the resetting isn't needed at all, I'd have 
to study the code a bit more (file a bug, attach your current version). We 
don't reset the color ... not sure if that is intentional or a bug itself.
17:28:32 <owen> But definitely pango_xft_renderer_set_default_color() 
needs to set the alpha to 0xffff if you don't reset
Comment 1 Mikael Magnusson 2005-03-08 16:32:03 UTC
Created attachment 38421 [details] [review]
second version of the patch
Comment 2 Owen Taylor 2005-06-21 16:21:14 UTC
Created attachment 48107 [details] [review]
Patch I'm applying

Here's what I'm applying. What I meant about restoring the alpha was
after the rendering was entirely done, not after rendering just one 
Comment 3 Owen Taylor 2005-06-21 16:22:55 UTC
2005-06-21  Owen Taylor  <>

        * pango/pangoxft-render.c (get_renderer): Go back to
        honoring alpha in the XftColor passed in; it was a 1.6 => 1.8
        regression. (#169622, based on a patch from Mikael Magnusson)
Comment 4 Mikael Magnusson 2005-06-21 16:26:13 UTC