Cairo canvas fixes

+ Move BitmapEx construction from an XBitmapCanvas into BitmapEx
where (arguably) it will be easier to re-factor later, treat a
mask fetch failure as if we have no mask
+ Teach the cairo canvas to return a non-pre-multiplied RGB +
separate Alpha BitmapEx when it can to avoid unpleasantness with
the underlying X resources.
+ Add tentative code-path to convert 32bit color Bitmaps into
24bit color, to avoid confusing X

Change-Id: Iaf6998c796aea6d73c57bed2bc03152d9636d5f5

0 files changed, 0 insertions, 0 deletions