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authorMarek Olšák <[email protected]>2010-12-26 04:30:51 +0100
committerMarek Olšák <[email protected]>2011-02-14 21:50:08 +0100
commit2a904fd6a0cb80eec6dec2bae07fd8778b04caf3 (patch)
tree8a959d1eb02aa38721a6bacab9441d81adafc47f /src/gallium/docs
parentcdca3c58aa2d9549f5188910e2a77b438516714f (diff)
st/mesa: set vertex arrays state only when necessary
The vertex arrays state should be set only when (_NEW_ARRAY | _NEW_PROGRAM) is dirty. This assumes user buffer content is mutable, which will be sorted out in the next commit. The following usage case should be much faster now: for (i = 0; i < 1000; i++) { glDrawElements(...); } Or even: for (i = 0; i < 1000; i++) { glSomeStateChangeOtherThanArraysOrProgram(...); glDrawElements(...); } The performance increase from this may be significant in some apps and negligible in others. It is especially noticable in the Torcs game (r300g): Before: 15.4 fps After: 20 fps Also less looping over attribs in st_draw_vbo yields slight speed-up in apps with lots of glDraw* calls.
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