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r600g: fix lod bias/explicit lod with cube maps.

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While developing cube map array support I found that we didn't
support this properly, also piglit didn't test for it at all.

I've submitted a test to piglit to check for this, and this
fixes explicit lod and lod bias with cube maps.

NOTE: This is a candidate for the 9.0 branch.

Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 037b4f8038)
This commit is contained in:
Dave Airlie 2012-11-07 07:51:56 +10:00 • committed by Marek Olšák
parent 8b2922ff5a
commit d0a9ab29b2
1 changed files with 20 additions and 8 deletions
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28
src/gallium/drivers/r600/r600_shader.c
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@ -4012,6 +4012,23 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
if (r)
return r;
}
/* for cube forms of lod and bias we need to route the lod
value into Z */
if (inst->Instruction.Opcode == TGSI_OPCODE_TXB ||
inst->Instruction.Opcode == TGSI_OPCODE_TXL) {
memset(&alu, 0, sizeof(struct r600_bytecode_alu));
alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV);
r600_bytecode_src(&alu.src[0], &ctx->src[0], 3);
alu.dst.sel = ctx->temp_reg;
alu.dst.chan = 2;
alu.last = 1;
alu.dst.write = 1;
r = r600_bytecode_add_alu(ctx->bc, &alu);
if (r)
return r;
}
src_loaded = TRUE;
src_gpr = ctx->temp_reg;
}
@ -4087,17 +4104,12 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
tex.src_rel = ctx->src[0].rel;
}
if (inst->Texture.Texture == TGSI_TEXTURE_CUBE) {
if (inst->Texture.Texture == TGSI_TEXTURE_CUBE ||
inst->Texture.Texture == TGSI_TEXTURE_SHADOWCUBE) {
tex.src_sel_x = 1;
tex.src_sel_y = 0;
tex.src_sel_z = 3;
tex.src_sel_w = 1;
}
if (inst->Texture.Texture == TGSI_TEXTURE_SHADOWCUBE) {
tex.src_sel_x = 1;
tex.src_sel_y = 0;
tex.src_sel_z = 3;
tex.src_sel_w = 2; /* route Z compare value into W */
tex.src_sel_w = 2; /* route Z compare or Lod value into W */
}
if (inst->Texture.Texture != TGSI_TEXTURE_RECT &&