diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/r300/r300_state_shader.c | 29 | ||||
| -rw-r--r-- | src/gallium/drivers/r300/r300_state_shader.h | 6 |
2 files changed, 31 insertions, 4 deletions
diff --git a/src/gallium/drivers/r300/r300_state_shader.c b/src/gallium/drivers/r300/r300_state_shader.c index 1b02239ee76..7257638dbed 100644 --- a/src/gallium/drivers/r300/r300_state_shader.c +++ b/src/gallium/drivers/r300/r300_state_shader.c @@ -59,6 +59,12 @@ static void r300_fs_declare(struct r300_fs_asm* assembler, } break; case TGSI_FILE_OUTPUT: + /* Depth write. Mark the position of the output so we can + * identify it later. */ + if (decl->Semantic.SemanticName == TGSI_SEMANTIC_POSITION) { + assembler->depth_output = decl->DeclarationRange.First; + } + break; case TGSI_FILE_CONSTANT: break; case TGSI_FILE_TEMPORARY: @@ -120,6 +126,14 @@ static INLINE unsigned r300_fs_dst(struct r300_fs_asm* assembler, return 0; } +static INLINE boolean r300_fs_is_depr(struct r300_fs_asm* assembler, + struct tgsi_dst_register* dst) +{ + return (assembler->writes_depth && + (dst->File == TGSI_FILE_OUTPUT) && + (dst->Index == assembler->depth_output)); +} + static INLINE unsigned r500_fix_swiz(unsigned s) { /* For historical reasons, the swizzle values x, y, z, w, and 0 are @@ -302,16 +316,21 @@ static INLINE void r500_emit_alu(struct r500_fragment_shader* fs, int i = fs->instruction_count; if (dst->DstRegister.File == TGSI_FILE_OUTPUT) { - fs->instructions[i].inst0 = R500_INST_TYPE_OUT | - R500_ALU_OMASK(dst->DstRegister.WriteMask); + fs->instructions[i].inst0 = R500_INST_TYPE_OUT; + if (r300_fs_is_depr(assembler, dst)) { + fs->instructions[i].inst4 = R500_W_OMASK; + } else { + fs->instructions[i].inst0 |= + R500_ALU_OMASK(dst->DstRegister.WriteMask); + } } else { fs->instructions[i].inst0 = R500_INST_TYPE_ALU | - R500_ALU_WMASK(dst->DstRegister.WriteMask); + R500_ALU_WMASK(dst->DstRegister.WriteMask); } fs->instructions[i].inst0 |= R500_INST_TEX_SEM_WAIT; - fs->instructions[i].inst4 = + fs->instructions[i].inst4 |= R500_ALPHA_ADDRD(r300_fs_dst(assembler, &dst->DstRegister)); fs->instructions[i].inst5 = R500_ALU_RGBA_ADDRD(r300_fs_dst(assembler, &dst->DstRegister)); @@ -581,6 +600,8 @@ void r300_translate_fragment_shader(struct r300_context* r300, } /* Setup starting offset for immediates. */ assembler->imm_offset = consts->user_count; + /* Enable depth writes, if needed. */ + assembler->writes_depth = fs->info.writes_z; /* Make sure we start at the beginning of the shader. */ if (is_r500) { diff --git a/src/gallium/drivers/r300/r300_state_shader.h b/src/gallium/drivers/r300/r300_state_shader.h index 185fdd90f0c..f4fb31d86c9 100644 --- a/src/gallium/drivers/r300/r300_state_shader.h +++ b/src/gallium/drivers/r300/r300_state_shader.h @@ -57,6 +57,7 @@ #define R500_TEX_WMASK(x) ((x) << 11) #define R500_ALU_WMASK(x) ((x) << 11) #define R500_ALU_OMASK(x) ((x) << 15) +#define R500_W_OMASK (1 << 31) /* TGSI constants. TGSI is like XML: If it can't solve your problems, you're * not using enough of it. */ @@ -99,6 +100,11 @@ struct r300_fs_asm { unsigned imm_offset; /* Number of immediate constants. */ unsigned imm_count; + /* Are depth writes enabled? */ + boolean writes_depth; + /* Depth write offset. This is the TGSI output that corresponds to + * depth writes. */ + unsigned depth_output; }; void r300_translate_fragment_shader(struct r300_context* r300, |