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st/mesa: avoid vertex texture and sampler updates for 0 case

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If we had no vertex textures or samplers previously and we have none now,
don't bother doing the enables dance.

I was profiling nexuiz on noop and noticed these two functions in the
profile, this drops their usage from 0.86% to 0.03% and 0.23% to 0.03%
for texture and samplers.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-02-07 16:18:05 +00:00
parent 33f4461ec9
commit 833a33bf6e
2 changed files with 5 additions and 0 deletions
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2
src/mesa/state_tracker/st_atom_sampler.c
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@ -201,6 +201,8 @@ update_vertex_samplers(struct st_context *st)
struct gl_vertex_program *vprog = ctx->VertexProgram._Current;
GLuint su;
if (st->state.num_vertex_samplers == 0 && vprog->Base.SamplersUsed == 0)
return;
st->state.num_vertex_samplers = 0;
/* loop over sampler units (aka tex image units) */

3
src/mesa/state_tracker/st_atom_texture.c
View file

@ -260,6 +260,9 @@ update_vertex_textures(struct st_context *st)
struct gl_vertex_program *vprog = ctx->VertexProgram._Current;
GLuint su;
if (!vprog->Base.SamplersUsed && st->state.num_vertex_textures == 0)
return;
st->state.num_vertex_textures = 0;
/* loop over sampler units (aka tex image units) */