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authorBrian <brian.paul@tungstengraphics.com>2008-02-23 16:17:17 -0700
committerBrian <brian.paul@tungstengraphics.com>2008-02-23 16:17:17 -0700
commit012391357fcbefd2b34e999eed91a129d5efd77c (patch)
tree2d2e639aeb24923af9108bb56daaf8356155d378 /src/gallium
parent35ca45daba3906ac94fb879d2374d476ba2dac47 (diff)
gallium: disable early Z test if fragment shader contains KIL instruction.
Use tgsi_scan_shader() to determine if the fragment shader uses KIL or writes fragment.z
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/softpipe/sp_quad.c5
-rw-r--r--src/gallium/drivers/softpipe/sp_state.h3
-rw-r--r--src/gallium/drivers/softpipe/sp_state_fs.c22
3 files changed, 19 insertions, 11 deletions
diff --git a/src/gallium/drivers/softpipe/sp_quad.c b/src/gallium/drivers/softpipe/sp_quad.c
index 15b5594547..142dbcc771 100644
--- a/src/gallium/drivers/softpipe/sp_quad.c
+++ b/src/gallium/drivers/softpipe/sp_quad.c
@@ -56,11 +56,12 @@ sp_build_depth_stencil(
void
sp_build_quad_pipeline(struct softpipe_context *sp)
{
- boolean early_depth_test =
+ boolean early_depth_test =
sp->depth_stencil->depth.enabled &&
sp->framebuffer.zsbuf &&
!sp->depth_stencil->alpha.enabled &&
- sp->fs->shader.output_semantic_name[0] != TGSI_SEMANTIC_POSITION;
+ !sp->fs->uses_kill &&
+ !sp->fs->writes_z;
/* build up the pipeline in reverse order... */
diff --git a/src/gallium/drivers/softpipe/sp_state.h b/src/gallium/drivers/softpipe/sp_state.h
index 6ff31e601f..5aaa9e346b 100644
--- a/src/gallium/drivers/softpipe/sp_state.h
+++ b/src/gallium/drivers/softpipe/sp_state.h
@@ -63,6 +63,9 @@ struct tgsi_exec_machine;
struct sp_fragment_shader {
struct pipe_shader_state shader;
+ boolean uses_kill;
+ boolean writes_z;
+
void (*prepare)( const struct sp_fragment_shader *shader,
struct tgsi_exec_machine *machine,
struct tgsi_sampler *samplers);
diff --git a/src/gallium/drivers/softpipe/sp_state_fs.c b/src/gallium/drivers/softpipe/sp_state_fs.c
index b0238f8173..b184ac61bb 100644
--- a/src/gallium/drivers/softpipe/sp_state_fs.c
+++ b/src/gallium/drivers/softpipe/sp_state_fs.c
@@ -36,6 +36,7 @@
#include "pipe/p_shader_tokens.h"
#include "draw/draw_context.h"
#include "tgsi/util/tgsi_dump.h"
+#include "tgsi/util/tgsi_scan.h"
void *
@@ -44,21 +45,24 @@ softpipe_create_fs_state(struct pipe_context *pipe,
{
struct softpipe_context *softpipe = softpipe_context(pipe);
struct sp_fragment_shader *state;
+ struct tgsi_shader_info info;
+
+ tgsi_scan_shader(templ->tokens, &info);
if (softpipe->dump_fs)
tgsi_dump(templ->tokens, 0);
state = softpipe_create_fs_llvm( softpipe, templ );
- if (state)
- return state;
-
- state = softpipe_create_fs_sse( softpipe, templ );
- if (state)
- return state;
-
- state = softpipe_create_fs_exec( softpipe, templ );
-
+ if (!state) {
+ state = softpipe_create_fs_sse( softpipe, templ );
+ if (!state) {
+ state = softpipe_create_fs_exec( softpipe, templ );
+ }
+ }
assert(state);
+ state->uses_kill = (info.opcode_count[TGSI_OPCODE_KIL] ||
+ info.opcode_count[TGSI_OPCODE_KILP]);
+ state->writes_z = info.writes_z;
return state;
}