bugle-stats_fragments - gather fragment counts
The stats_fragments filter-set provides signals for the number of fragments to
other filter-sets. It must be listed in a chain that uses any statistics
related to fragment counts.
It is simply a wrapper around GL_ARB_occlusion_query, so a fragment is defined
exactly as in that extension
 (and OpenGL 1.5), and will not work
unless that extension is supported.
Fragment counting will not work in applications that use occlusion queries. A
warning is displayed when this is detected.
bugle is written and maintained by Bruce Merry.