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authorEric Anholt <eric@anholt.net>2010-10-13 16:13:45 -0700
committerEric Anholt <eric@anholt.net>2010-10-13 17:07:43 -0700
commita57ef244fc55476660f9fb76982130c5c0b25163 (patch)
treead000d060bd912b9da0e311d740e9beeb3db2492 /src/mesa/drivers
parenta21a2748beb1f42d21e14858eee9a1323d85a00f (diff)
i965: Add support for rescaling GL_TEXTURE_RECTANGLE coords to new FS.
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp45
1 files changed, 40 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 35bb28914e..7119f971f8 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -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;