[Note: I discovered this bug while testing with the i965 driver, but it's certainly possible that it's actually a general bug in mesa.] The OpenGL specification indicates that the glBitmap operation should generate fragments. It says: Bitmaps are rectangles of zeros and ones specifying a particular pattern of fragments to be produced. [OpenGL 3.0 § 3.8] I recently added the occlusion_query_meta_fragments test to piglit to ensure this behavior. It executes a glBitmap operation within an occlusion query, expecting a result of the same number as pixels as set in the bitmap. This test currently fails, (the occlusion query reports 0 fragments rather than the expected 8 fragments for a 4x4 bitmap with 8 of the 16 pixels set). -Carl
commit cf37e12024911e2b4c972db9472a81e71ca2f086 Author: Eric Anholt <eric@anholt.net> Date: Tue May 21 16:20:18 2013 -0700 intel: Count fragments in our blitter-based glBitmap() path. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59440 Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Thanks, Eric. -Carl
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