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authorEric Anholt <[email protected]>2010-10-06 11:13:22 -0700
committerEric Anholt <[email protected]>2010-10-06 12:13:08 -0700
commita760b5b509f85991a10400977576afabcedbb3c5 (patch)
tree7b8f2ab17b3e6b5bb581bdab847a8b6e8dcf4619 /src/mesa
parent75270f705f319b0ecf297d1bdd328e52a8a956aa (diff)
i965: Refactor gl_FrontFacing setup out of general variable setup.
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs.cpp53
1 files changed, 31 insertions, 22 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 19739901619..c5013f05745 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -474,8 +474,9 @@ public:
void generate_ddy(fs_inst *inst, struct brw_reg dst, struct brw_reg src);
void emit_dummy_fs();
- void emit_fragcoord_interpolation(ir_variable *ir);
- void emit_general_interpolation(ir_variable *ir);
+ fs_reg *emit_fragcoord_interpolation(ir_variable *ir);
+ fs_reg *emit_frontfacing_interpolation(ir_variable *ir);
+ fs_reg *emit_general_interpolation(ir_variable *ir);
void emit_interpolation_setup_gen4();
void emit_interpolation_setup_gen6();
fs_inst *emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate);
@@ -721,7 +722,7 @@ fs_visitor::setup_builtin_uniform_values(ir_variable *ir)
}
}
-void
+fs_reg *
fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
{
fs_reg *reg = new(this->mem_ctx) fs_reg(this, ir->type);
@@ -761,11 +762,10 @@ fs_visitor::emit_fragcoord_interpolation(ir_variable *ir)
/* gl_FragCoord.w: Already set up in emit_interpolation */
emit(fs_inst(BRW_OPCODE_MOV, wpos, this->wpos_w));
- hash_table_insert(this->variable_ht, reg, ir);
+ return reg;
}
-
-void
+fs_reg *
fs_visitor::emit_general_interpolation(ir_variable *ir)
{
fs_reg *reg = new(this->mem_ctx) fs_reg(this, ir->type);
@@ -823,7 +823,25 @@ fs_visitor::emit_general_interpolation(ir_variable *ir)
}
}
- hash_table_insert(this->variable_ht, reg, ir);
+ return reg;
+}
+
+fs_reg *
+fs_visitor::emit_frontfacing_interpolation(ir_variable *ir)
+{
+ fs_reg *reg = new(this->mem_ctx) fs_reg(this, ir->type);
+ struct brw_reg r1_6ud = retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_UD);
+ /* bit 31 is "primitive is back face", so checking < (1 << 31) gives
+ * us front face
+ */
+ fs_inst *inst = emit(fs_inst(BRW_OPCODE_CMP,
+ *reg,
+ fs_reg(r1_6ud),
+ fs_reg(1u << 31)));
+ inst->conditional_mod = BRW_CONDITIONAL_L;
+ emit(fs_inst(BRW_OPCODE_AND, *reg, *reg, fs_reg(1u)));
+
+ return reg;
}
void
@@ -844,24 +862,15 @@ fs_visitor::visit(ir_variable *ir)
if (ir->mode == ir_var_in) {
if (!strcmp(ir->name, "gl_FragCoord")) {
- emit_fragcoord_interpolation(ir);
- return;
+ reg = emit_fragcoord_interpolation(ir);
} else if (!strcmp(ir->name, "gl_FrontFacing")) {
- reg = new(this->mem_ctx) fs_reg(this, ir->type);
- struct brw_reg r1_6ud = retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_UD);
- /* bit 31 is "primitive is back face", so checking < (1 << 31) gives
- * us front face
- */
- fs_inst *inst = emit(fs_inst(BRW_OPCODE_CMP,
- *reg,
- fs_reg(r1_6ud),
- fs_reg(1u << 31)));
- inst->conditional_mod = BRW_CONDITIONAL_L;
- emit(fs_inst(BRW_OPCODE_AND, *reg, *reg, fs_reg(1u)));
+ reg = emit_frontfacing_interpolation(ir);
} else {
- emit_general_interpolation(ir);
- return;
+ reg = emit_general_interpolation(ir);
}
+ assert(reg);
+ hash_table_insert(this->variable_ht, reg, ir);
+ return;
}
if (ir->mode == ir_var_uniform) {