diff options
| -rw-r--r-- | src/mesa/program/prog_to_nir.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/src/mesa/program/prog_to_nir.c b/src/mesa/program/prog_to_nir.c index d3e3f15c959..d54f934247d 100644 --- a/src/mesa/program/prog_to_nir.c +++ b/src/mesa/program/prog_to_nir.c @@ -924,10 +924,23 @@ ptn_add_output_stores(struct ptn_compile *c) foreach_list_typed(nir_variable, var, node, &b->shader->outputs) { nir_intrinsic_instr *store = nir_intrinsic_instr_create(b->shader, nir_intrinsic_store_var); - store->num_components = 4; + store->num_components = glsl_get_vector_elements(var->type); store->variables[0] = nir_deref_var_create(store, c->output_vars[var->data.location]); - store->src[0].reg.reg = c->output_regs[var->data.location]; + + if (c->prog->Target == GL_FRAGMENT_PROGRAM_ARB && + var->data.location == FRAG_RESULT_DEPTH) { + /* result.depth has this strange convention of being the .z component of + * a vec4 with undefined .xyw components. We resolve it to a scalar, to + * match GLSL's gl_FragDepth and the expectations of most backends. + */ + nir_alu_src alu_src = { NIR_SRC_INIT }; + alu_src.src = nir_src_for_reg(c->output_regs[FRAG_RESULT_DEPTH]); + alu_src.swizzle[0] = SWIZZLE_Z; + store->src[0] = nir_src_for_ssa(nir_fmov_alu(b, alu_src, 1)); + } else { + store->src[0].reg.reg = c->output_regs[var->data.location]; + } nir_instr_insert_after_cf_list(c->build.cf_node_list, &store->instr); } } @@ -1020,7 +1033,10 @@ setup_registers_and_variables(struct ptn_compile *c) reg->num_components = 4; nir_variable *var = rzalloc(shader, nir_variable); - var->type = glsl_vec4_type(); + if (c->prog->Target == GL_FRAGMENT_PROGRAM_ARB && i == FRAG_RESULT_DEPTH) + var->type = glsl_float_type(); + else + var->type = glsl_vec4_type(); var->data.mode = nir_var_shader_out; var->name = ralloc_asprintf(var, "out_%d", i); |