Mesa (master): softpipe: add support for shader stencil export capability
Dave Airlie
airlied at kemper.freedesktop.org
Tue Oct 12 23:39:38 UTC 2010
Module: Mesa
Branch: master
Commit: d8f6ef456581644ab9444a1ed23542c2b0fff9e4
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=d8f6ef456581644ab9444a1ed23542c2b0fff9e4
Author: Dave Airlie <airlied at redhat.com>
Date: Wed Oct 6 09:32:32 2010 +1000
softpipe: add support for shader stencil export capability
this allows softpipe to be used to test shader stencil ref exporting.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
src/gallium/drivers/softpipe/sp_fs_sse.c | 12 +++-
src/gallium/drivers/softpipe/sp_quad.h | 1 +
src/gallium/drivers/softpipe/sp_quad_depth_test.c | 61 ++++++++++++++++++---
src/gallium/drivers/softpipe/sp_quad_pipe.c | 3 +-
src/gallium/drivers/softpipe/sp_screen.c | 2 +
5 files changed, 67 insertions(+), 12 deletions(-)
diff --git a/src/gallium/drivers/softpipe/sp_fs_sse.c b/src/gallium/drivers/softpipe/sp_fs_sse.c
index daa158d..5b18cd0 100644
--- a/src/gallium/drivers/softpipe/sp_fs_sse.c
+++ b/src/gallium/drivers/softpipe/sp_fs_sse.c
@@ -169,9 +169,15 @@ fs_sse_run( const struct sp_fragment_shader *base,
case TGSI_SEMANTIC_POSITION:
{
uint j;
- for (j = 0; j < 4; j++) {
- quad->output.depth[j] = machine->Outputs[0].xyzw[2].f[j];
- }
+ for (j = 0; j < 4; j++)
+ quad->output.depth[j] = machine->Outputs[i].xyzw[2].f[j];
+ }
+ break;
+ case TGSI_SEMANTIC_STENCIL:
+ {
+ uint j;
+ for (j = 0; j < 4; j++)
+ quad->output.stencil[j] = machine->Outputs[i].xyzw[1].f[j];
}
break;
}
diff --git a/src/gallium/drivers/softpipe/sp_quad.h b/src/gallium/drivers/softpipe/sp_quad.h
index a3236bd..e745aa8 100644
--- a/src/gallium/drivers/softpipe/sp_quad.h
+++ b/src/gallium/drivers/softpipe/sp_quad.h
@@ -85,6 +85,7 @@ struct quad_header_output
/** colors in SOA format (rrrr, gggg, bbbb, aaaa) */
float color[PIPE_MAX_COLOR_BUFS][NUM_CHANNELS][QUAD_SIZE];
float depth[QUAD_SIZE];
+ uint8_t stencil[QUAD_SIZE];
};
diff --git a/src/gallium/drivers/softpipe/sp_quad_depth_test.c b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
index e9b9262..c8f5f89 100644
--- a/src/gallium/drivers/softpipe/sp_quad_depth_test.c
+++ b/src/gallium/drivers/softpipe/sp_quad_depth_test.c
@@ -47,6 +47,8 @@ struct depth_data {
unsigned bzzzz[QUAD_SIZE]; /**< Z values fetched from depth buffer */
unsigned qzzzz[QUAD_SIZE]; /**< Z values from the quad */
ubyte stencilVals[QUAD_SIZE];
+ boolean use_shader_stencil_refs;
+ ubyte shader_stencil_refs[QUAD_SIZE];
struct softpipe_cached_tile *tile;
};
@@ -186,6 +188,33 @@ convert_quad_depth( struct depth_data *data,
}
+/**
+ * Compute the depth_data::shader_stencil_refs[] values from the float fragment stencil values.
+ */
+static void
+convert_quad_stencil( struct depth_data *data,
+ const struct quad_header *quad )
+{
+ unsigned j;
+
+ data->use_shader_stencil_refs = TRUE;
+ /* Copy quads stencil values
+ */
+ switch (data->format) {
+ case PIPE_FORMAT_Z24X8_UNORM:
+ case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+ case PIPE_FORMAT_X8Z24_UNORM:
+ case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+ {
+ for (j = 0; j < QUAD_SIZE; j++) {
+ data->shader_stencil_refs[j] = ((unsigned)(quad->output.stencil[j]));
+ }
+ }
+ break;
+ default:
+ assert(0);
+ }
+}
/**
* Write data->bzzzz[] values and data->stencilVals into the Z/stencil buffer.
@@ -272,8 +301,14 @@ do_stencil_test(struct depth_data *data,
{
unsigned passMask = 0x0;
unsigned j;
+ ubyte refs[QUAD_SIZE];
- ref &= valMask;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (data->use_shader_stencil_refs)
+ refs[j] = data->shader_stencil_refs[j] & valMask;
+ else
+ refs[j] = ref & valMask;
+ }
switch (func) {
case PIPE_FUNC_NEVER:
@@ -281,42 +316,42 @@ do_stencil_test(struct depth_data *data,
break;
case PIPE_FUNC_LESS:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref < (data->stencilVals[j] & valMask)) {
+ if (refs[j] < (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
break;
case PIPE_FUNC_EQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref == (data->stencilVals[j] & valMask)) {
+ if (refs[j] == (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
break;
case PIPE_FUNC_LEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref <= (data->stencilVals[j] & valMask)) {
+ if (refs[j] <= (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
break;
case PIPE_FUNC_GREATER:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref > (data->stencilVals[j] & valMask)) {
+ if (refs[j] > (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
break;
case PIPE_FUNC_NOTEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref != (data->stencilVals[j] & valMask)) {
+ if (refs[j] != (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
break;
case PIPE_FUNC_GEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (ref >= (data->stencilVals[j] & valMask)) {
+ if (refs[j] >= (data->stencilVals[j] & valMask)) {
passMask |= (1 << j);
}
}
@@ -348,9 +383,14 @@ apply_stencil_op(struct depth_data *data,
{
unsigned j;
ubyte newstencil[QUAD_SIZE];
+ ubyte refs[QUAD_SIZE];
for (j = 0; j < QUAD_SIZE; j++) {
newstencil[j] = data->stencilVals[j];
+ if (data->use_shader_stencil_refs)
+ refs[j] = data->shader_stencil_refs[j];
+ else
+ refs[j] = ref;
}
switch (op) {
@@ -367,7 +407,7 @@ apply_stencil_op(struct depth_data *data,
case PIPE_STENCIL_OP_REPLACE:
for (j = 0; j < QUAD_SIZE; j++) {
if (mask & (1 << j)) {
- newstencil[j] = ref;
+ newstencil[j] = refs[j];
}
}
break;
@@ -688,8 +728,10 @@ depth_test_quads_fallback(struct quad_stage *qs,
unsigned i, pass = 0;
const struct sp_fragment_shader *fs = qs->softpipe->fs;
boolean interp_depth = !fs->info.writes_z;
+ boolean shader_stencil_ref = fs->info.writes_stencil;
struct depth_data data;
+ data.use_shader_stencil_refs = FALSE;
if (qs->softpipe->depth_stencil->alpha.enabled) {
nr = alpha_test_quads(qs, quads, nr);
@@ -716,6 +758,9 @@ depth_test_quads_fallback(struct quad_stage *qs,
}
if (qs->softpipe->depth_stencil->stencil[0].enabled) {
+ if (shader_stencil_ref)
+ convert_quad_stencil(&data, quads[i]);
+
depth_stencil_test_quad(qs, &data, quads[i]);
write_depth_stencil_values(&data, quads[i]);
}
diff --git a/src/gallium/drivers/softpipe/sp_quad_pipe.c b/src/gallium/drivers/softpipe/sp_quad_pipe.c
index 43b8e88..2cfd02a 100644
--- a/src/gallium/drivers/softpipe/sp_quad_pipe.c
+++ b/src/gallium/drivers/softpipe/sp_quad_pipe.c
@@ -47,7 +47,8 @@ sp_build_quad_pipeline(struct softpipe_context *sp)
sp->framebuffer.zsbuf &&
!sp->depth_stencil->alpha.enabled &&
!sp->fs->info.uses_kill &&
- !sp->fs->info.writes_z;
+ !sp->fs->info.writes_z &&
+ !sp->fs->info.writes_stencil;
sp->quad.first = sp->quad.blend;
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 2053d02..37557d1 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -114,6 +114,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
return 1;
case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
return 0;
+ case PIPE_CAP_SHADER_STENCIL_EXPORT:
+ return 1;
default:
return 0;
}
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