fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-05 09:38:07 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

i965: Refactor gl_FrontFacing setup out of general variable setup.

Browse source
This commit is contained in:
Eric Anholt 2010-10-06 11:13:22 -07:00
parent 75270f705f
commit a760b5b509
1 changed files with 31 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
src/mesa/drivers/dri/i965/brw_fs.cpp
View file

@ -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) {