diff options
| -rw-r--r-- | src/gallium/drivers/nv50/nv50_program.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c index 66190f070da..27827c7ecf1 100644 --- a/src/gallium/drivers/nv50/nv50_program.c +++ b/src/gallium/drivers/nv50/nv50_program.c @@ -2463,6 +2463,23 @@ load_interpolant(struct nv50_pc *pc, struct nv50_reg *reg) emit_interp(pc, reg, iv, mode); } +/* The face input is always at v[255] (varying space), with a + * value of 0 for back-facing, and 0xffffffff for front-facing. + */ +static void +load_frontfacing(struct nv50_pc *pc, struct nv50_reg *a) +{ + struct nv50_reg *one = alloc_immd(pc, 1.0f); + + assert(a->rhw == -1); + alloc_reg(pc, a); /* do this before rhw is set */ + a->rhw = 255; + load_interpolant(pc, a); + emit_bitop2(pc, a, a, one, TGSI_OPCODE_AND); + + FREE(one); +} + static boolean nv50_program_tx_prep(struct nv50_pc *pc) { @@ -2607,6 +2624,8 @@ nv50_program_tx_prep(struct nv50_pc *pc) int rid, aid; unsigned n = 0, m = pc->attr_nr - flat_nr; + pc->allow32 = TRUE; + int base = (TGSI_SEMANTIC_POSITION == p->info.input_semantic_name[0]) ? 0 : 1; @@ -2635,6 +2654,12 @@ nv50_program_tx_prep(struct nv50_pc *pc) p->cfg.io[n].hw = rid = aid; i = p->cfg.io[n].id_fp; + if (p->info.input_semantic_name[n] == + TGSI_SEMANTIC_FACE) { + load_frontfacing(pc, &pc->attr[i * 4]); + continue; + } + for (c = 0; c < 4; ++c) { if (!pc->attr[i * 4 + c].acc) continue; |