Neil Roberts 66c54e04de cogl-pango: Don't set the special combine function for atlased textures
The material cache will now only set the special combine mode if the
texture only has an alpha component. The atlased textures will have
all four components so it will leave the combine functions at the
default. This increases the chances of batching between glyphs and
images.

When using the global atlas, the glyph from cairo is now rendered into
an ARGB surface rather than an alpha-only surface.
2011-05-05 17:32:30 +01:00
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