[Mesa-dev] [PATCH 1/2] draw/tgsi: implement geom shader invocation support.
Dave Airlie
airlied at gmail.com
Sun Jun 21 21:01:38 PDT 2015
From: Dave Airlie <airlied at redhat.com>
This is just for softpipe, llvmpipe won't work without
some changes.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
src/gallium/auxiliary/draw/draw_gs.c | 47 +++++++++++++++++++++-------------
src/gallium/auxiliary/draw/draw_gs.h | 2 ++
src/gallium/auxiliary/tgsi/tgsi_scan.c | 2 ++
src/gallium/auxiliary/tgsi/tgsi_scan.h | 1 +
4 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/src/gallium/auxiliary/draw/draw_gs.c b/src/gallium/auxiliary/draw/draw_gs.c
index 6375d41..755e527 100644
--- a/src/gallium/auxiliary/draw/draw_gs.c
+++ b/src/gallium/auxiliary/draw/draw_gs.c
@@ -190,9 +190,15 @@ static void tgsi_gs_prepare(struct draw_geometry_shader *shader,
const unsigned constants_size[PIPE_MAX_CONSTANT_BUFFERS])
{
struct tgsi_exec_machine *machine = shader->machine;
-
+ int j;
tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
constants, constants_size);
+
+ if (shader->info.uses_invocationid) {
+ unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INVOCATIONID];
+ for (j = 0; j < TGSI_QUAD_SIZE; j++)
+ machine->SystemValue[i].i[j] = shader->invocation_id;
+ }
}
static unsigned tgsi_gs_run(struct draw_geometry_shader *shader,
@@ -555,7 +561,7 @@ int draw_geometry_shader_run(struct draw_geometry_shader *shader,
* overflown vertices into some area where they won't harm anyone */
unsigned total_verts_per_buffer = shader->primitive_boundary *
num_in_primitives;
-
+ unsigned invocation;
//Assume at least one primitive
max_out_prims = MAX2(max_out_prims, 1);
@@ -564,7 +570,7 @@ int draw_geometry_shader_run(struct draw_geometry_shader *shader,
output_verts->stride = output_verts->vertex_size;
output_verts->verts =
(struct vertex_header *)MALLOC(output_verts->vertex_size *
- total_verts_per_buffer);
+ total_verts_per_buffer * shader->num_invocations);
debug_assert(output_verts->verts);
#if 0
@@ -592,7 +598,7 @@ int draw_geometry_shader_run(struct draw_geometry_shader *shader,
shader->input = input;
shader->input_info = input_info;
FREE(shader->primitive_lengths);
- shader->primitive_lengths = MALLOC(max_out_prims * sizeof(unsigned));
+ shader->primitive_lengths = MALLOC(max_out_prims * sizeof(unsigned) * shader->num_invocations);
#ifdef HAVE_LLVM
@@ -622,23 +628,26 @@ int draw_geometry_shader_run(struct draw_geometry_shader *shader,
}
#endif
- shader->prepare(shader, constants, constants_size);
+ for (invocation = 0; invocation < shader->num_invocations; invocation++) {
+ shader->invocation_id = invocation;
- if (input_prim->linear)
- gs_run(shader, input_prim, input_verts,
- output_prims, output_verts);
- else
- gs_run_elts(shader, input_prim, input_verts,
- output_prims, output_verts);
+ shader->prepare(shader, constants, constants_size);
- /* Flush the remaining primitives. Will happen if
- * num_input_primitives % 4 != 0
- */
- if (shader->fetched_prim_count > 0) {
- gs_flush(shader);
- }
+ if (input_prim->linear)
+ gs_run(shader, input_prim, input_verts,
+ output_prims, output_verts);
+ else
+ gs_run_elts(shader, input_prim, input_verts,
+ output_prims, output_verts);
- debug_assert(shader->fetched_prim_count == 0);
+ /* Flush the remaining primitives. Will happen if
+ * num_input_primitives % 4 != 0
+ */
+ if (shader->fetched_prim_count > 0) {
+ gs_flush(shader);
+ }
+ debug_assert(shader->fetched_prim_count == 0);
+ }
/* Update prim_info:
*/
@@ -771,6 +780,8 @@ draw_create_geometry_shader(struct draw_context *draw,
gs->info.properties[TGSI_PROPERTY_GS_OUTPUT_PRIM];
gs->max_output_vertices =
gs->info.properties[TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES];
+ gs->num_invocations =
+ gs->info.properties[TGSI_PROPERTY_GS_INVOCATIONS];
if (!gs->max_output_vertices)
gs->max_output_vertices = 32;
diff --git a/src/gallium/auxiliary/draw/draw_gs.h b/src/gallium/auxiliary/draw/draw_gs.h
index 49e93d5..663ba84 100644
--- a/src/gallium/auxiliary/draw/draw_gs.h
+++ b/src/gallium/auxiliary/draw/draw_gs.h
@@ -90,6 +90,8 @@ struct draw_geometry_shader {
unsigned vector_length;
unsigned max_out_prims;
+ unsigned num_invocations;
+ unsigned invocation_id;
#ifdef HAVE_LLVM
struct draw_gs_inputs *gs_input;
struct draw_gs_jit_context *jit_context;
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index 369f56a..711413c 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -248,6 +248,8 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
}
else if (semName == TGSI_SEMANTIC_PRIMID) {
info->uses_primid = TRUE;
+ } else if (semName == TGSI_SEMANTIC_INVOCATIONID) {
+ info->uses_invocationid = TRUE;
}
}
else if (file == TGSI_FILE_OUTPUT) {
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index af4b128..b81bdd7 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -89,6 +89,7 @@ struct tgsi_shader_info
boolean uses_basevertex;
boolean uses_primid;
boolean uses_frontface;
+ boolean uses_invocationid;
boolean writes_psize;
boolean writes_clipvertex;
boolean writes_viewport_index;
--
2.4.3
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