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st/mesa: emit saturates in the vertex shader if Shader Model 3.0 is supported

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v2: change the requirement from GLSL 1.30 to SM 3.0 (R500 can do this)
This commit is contained in:
Marek Olšák 2013-01-31 22:30:44 +01:00
parent 48689ca14a
commit 4362bdadf3
3 changed files with 6 additions and 3 deletions
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1
src/mesa/state_tracker/st_context.c
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@ -182,6 +182,7 @@ st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
st->has_stencil_export =
screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
/* GL limits and extensions */
st_init_limits(st);

1
src/mesa/state_tracker/st_context.h
View file

@ -84,6 +84,7 @@ struct st_context
GLboolean clamp_vert_color_in_shader;
boolean has_stencil_export; /**< can do shader stencil export? */
boolean has_time_elapsed;
boolean has_shader_model3;
/* On old libGL's for linux we need to invalidate the drawables
* on glViewpport calls, this is set via a option.

7
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
View file

@ -1287,11 +1287,12 @@ glsl_to_tgsi_visitor::try_emit_mad_for_and_not(ir_expression *ir, int try_operan
bool
glsl_to_tgsi_visitor::try_emit_sat(ir_expression *ir)
{
/* Saturates were only introduced to vertex programs in
* NV_vertex_program3, so don't give them to drivers in the VP.
/* Emit saturates in the vertex shader only if SM 3.0 is supported.
*/
if (this->prog->Target == GL_VERTEX_PROGRAM_ARB)
if (this->prog->Target == GL_VERTEX_PROGRAM_ARB &&
!st_context(this->ctx)->has_shader_model3) {
return false;
}
ir_rvalue *sat_src = ir->as_rvalue_to_saturate();
if (!sat_src)