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i965: Add support for rescaling GL_TEXTURE_RECTANGLE coords to new FS.

This commit is contained in:
Eric Anholt 2010-10-13 16:13:45 -07:00
parent a21a2748be
commit a57ef244fc
1 changed files with 40 additions and 5 deletions
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45
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -1177,6 +1177,7 @@ fs_visitor::emit_texture_gen5(ir_texture *ir, fs_reg dst, fs_reg coordinate)
void
fs_visitor::visit(ir_texture *ir)
{
int sampler;
fs_inst *inst = NULL;
ir->coordinate->accept(this);
@ -1185,6 +1186,44 @@ fs_visitor::visit(ir_texture *ir)
/* Should be lowered by do_lower_texture_projection */
assert(!ir->projector);
sampler = _mesa_get_sampler_uniform_value(ir->sampler,
ctx->Shader.CurrentProgram,
&brw->fragment_program->Base);
sampler = c->fp->program.Base.SamplerUnits[sampler];
/* The 965 requires the EU to do the normalization of GL rectangle
* texture coordinates. We use the program parameter state
* tracking to get the scaling factor.
*/
if (ir->sampler->type->sampler_dimensionality == GLSL_SAMPLER_DIM_RECT) {
struct gl_program_parameter_list *params = c->fp->program.Base.Parameters;
int tokens[STATE_LENGTH] = {
STATE_INTERNAL,
STATE_TEXRECT_SCALE,
sampler,
0,
0
};
fs_reg scale_x = fs_reg(UNIFORM, c->prog_data.nr_params);
fs_reg scale_y = fs_reg(UNIFORM, c->prog_data.nr_params + 1);
GLuint index = _mesa_add_state_reference(params,
(gl_state_index *)tokens);
float *vec_values = this->fp->Base.Parameters->ParameterValues[index];
c->prog_data.param[c->prog_data.nr_params++] = &vec_values[0];
c->prog_data.param[c->prog_data.nr_params++] = &vec_values[1];
fs_reg dst = fs_reg(this, ir->coordinate->type);
fs_reg src = coordinate;
coordinate = dst;
emit(fs_inst(BRW_OPCODE_MUL, dst, src, scale_x));
dst.reg_offset++;
src.reg_offset++;
emit(fs_inst(BRW_OPCODE_MUL, dst, src, scale_y));
}
/* Writemasking doesn't eliminate channels on SIMD8 texture
* samples, so don't worry about them.
*/
@ -1196,11 +1235,7 @@ fs_visitor::visit(ir_texture *ir)
inst = emit_texture_gen5(ir, dst, coordinate);
}
inst->sampler =
_mesa_get_sampler_uniform_value(ir->sampler,
ctx->Shader.CurrentProgram,
&brw->fragment_program->Base);
inst->sampler = c->fp->program.Base.SamplerUnits[inst->sampler];
inst->sampler = sampler;
this->result = dst;