http://bugs.freedesktop.org/show_bug.cgi?id=23670





--- Comment #1 from Brian Paul <brian.p...@tungstengraphics.com>  2009-09-03 
07:14:44 PST ---
Created an attachment (id=29175)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=29175)
test patch

Please try this patch.  It looks like the glDrawPixels(GL_LUMINANCE) case isn't
working because of a problem with luminance textures (sampling returns A=0
instead of A=1).  This patch uses a GL_RGBA texture instead.  The real bug is
probably elsewhere in the handling of GL_LUMINANCE textures...


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