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authorMarek Olšák <maraeo@gmail.com>2009-12-24 16:05:44 +0100
committerCorbin Simpson <MostAwesomeDude@gmail.com>2010-01-06 12:49:15 -0800
commit26f67a272b6668258fe3552a675414502e077dd9 (patch)
tree66de57576db7e4a5d2d937dc4b487dbb56d8a198 /src/gallium/drivers/r300/r300_vs.c
parentbf60eb3fec844a7c3793aba0c70da56b74a17344 (diff)
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r300g: disable the rasterization of WPOS if it's unused by the FS
Diffstat (limited to 'src/gallium/drivers/r300/r300_vs.c')
-rw-r--r--src/gallium/drivers/r300/r300_vs.c56
1 files changed, 37 insertions, 19 deletions
diff --git a/src/gallium/drivers/r300/r300_vs.c b/src/gallium/drivers/r300/r300_vs.c
index 57531fc..3512a6d 100644
--- a/src/gallium/drivers/r300/r300_vs.c
+++ b/src/gallium/drivers/r300/r300_vs.c
@@ -22,6 +22,7 @@
* USE OR OTHER DEALINGS IN THE SOFTWARE. */
#include "r300_vs.h"
+#include "r300_fs.h"
#include "r300_context.h"
#include "r300_screen.h"
@@ -90,10 +91,10 @@ static void r300_shader_read_vs_outputs(
}
}
-static void r300_shader_vap_output_fmt(
- struct r300_shader_semantics* vs_outputs,
- uint* hwfmt)
+static void r300_shader_vap_output_fmt(struct r300_vertex_shader* vs)
{
+ struct r300_shader_semantics* vs_outputs = &vs->outputs;
+ uint32_t* hwfmt = vs->hwfmt;
int i, gen_count;
/* Do the actual vertex_info setup.
@@ -146,15 +147,11 @@ static void r300_shader_vap_output_fmt(
gen_count++;
}
- /* WPOS. */
- if (vs_outputs->wpos != ATTR_UNUSED) {
- hwfmt[1] |= (R300_INPUT_CNTL_TC0 << gen_count);
- hwfmt[3] |= (4 << (3 * gen_count));
- gen_count++;
- }
-
/* XXX magic */
assert(gen_count <= 8);
+
+ /* WPOS. */
+ vs->wpos_tex_output = gen_count;
}
/* Sets up stream mapping to equivalent VS outputs if TCL is bypassed
@@ -211,9 +208,6 @@ static void r300_stream_locations_notcl(
gen_count++;
}
- /* XXX magic */
- assert(gen_count <= 8);
-
for (; tabi < 16;) {
stream_loc[tabi++] = -1;
}
@@ -296,7 +290,6 @@ void r300_translate_vertex_shader(struct r300_context* r300,
{
struct r300_vertex_program_compiler compiler;
struct tgsi_to_rc ttr;
- boolean use_wpos = TRUE;
/* Initialize. */
r300_shader_read_vs_outputs(&vs->info, &vs->outputs);
@@ -319,15 +312,13 @@ void r300_translate_vertex_shader(struct r300_context* r300,
r300_tgsi_to_rc(&ttr, vs->state.tokens);
- compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs+use_wpos));
+ compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs+1));
compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
/* Insert the WPOS output. */
- if (use_wpos) {
- r300_insert_wpos(&compiler, &vs->outputs);
- }
+ r300_insert_wpos(&compiler, &vs->outputs);
- r300_shader_vap_output_fmt(&vs->outputs, vs->hwfmt);
+ r300_shader_vap_output_fmt(vs);
r300_stream_locations_notcl(&vs->outputs, vs->stream_loc_notcl);
/* Invoke the compiler */
@@ -342,3 +333,30 @@ void r300_translate_vertex_shader(struct r300_context* r300,
rc_destroy(&compiler.Base);
vs->translated = TRUE;
}
+
+boolean r300_vertex_shader_setup_wpos(struct r300_context* r300)
+{
+ struct r300_vertex_shader* vs = r300->vs;
+ int tex_output = r300->vs->wpos_tex_output;
+ uint32_t tex_fmt = R300_INPUT_CNTL_TC0 << tex_output;
+ uint32_t* hwfmt = vs->hwfmt;
+
+ if (r300->fs->inputs.wpos != ATTR_UNUSED) {
+ /* Enable WPOS in VAP. */
+ if (!(hwfmt[1] & tex_fmt)) {
+ hwfmt[1] |= tex_fmt;
+ hwfmt[3] |= (4 << (3 * tex_output));
+
+ assert(tex_output < 8);
+ return TRUE;
+ }
+ } else {
+ /* Disable WPOS in VAP. */
+ if (hwfmt[1] & tex_fmt) {
+ hwfmt[1] &= ~tex_fmt;
+ hwfmt[3] &= ~(4 << (3 * tex_output));
+ return TRUE;
+ }
+ }
+ return FALSE;
+}