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draw: implement lines with adjacency in geometry shaders

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This commit is contained in:
Zack Rusin
2010-06-17 10:48:23 -04:00
parent 91862051f9
commit dc8f64c537
2 changed files with 48 additions and 18 deletions
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src/gallium/auxiliary/draw/draw_gs.c
+40 -14
View File
@@ -203,7 +203,7 @@ draw_geometry_fetch_outputs(struct draw_geometry_shader *shader,
shader->emitted_primitives += num_primitives;
}
/*#define DEBUG_INPUTS 1*/
static void draw_fetch_gs_input(struct draw_geometry_shader *shader,
unsigned *indices,
unsigned num_vertices,
@@ -218,19 +218,28 @@ static void draw_fetch_gs_input(struct draw_geometry_shader *shader,
for (i = 0; i < num_vertices; ++i) {
const float (*input)[4];
/*debug_printf("%d) vertex index = %d (prim idx = %d)\n", i, indices[i], prim_idx);*/
#if DEBUG_INPUTS
debug_printf("%d) vertex index = %d (prim idx = %d)\n",
i, indices[i], prim_idx);
#endif
input = (const float (*)[4])(
(const char *)input_ptr + (indices[i] * input_vertex_stride));
for (slot = 0, vs_slot = 0; slot < shader->info.num_inputs; ++slot) {
unsigned idx = i * TGSI_EXEC_MAX_INPUT_ATTRIBS + slot;
if (shader->info.input_semantic_name[slot] == TGSI_SEMANTIC_PRIMID) {
machine->Inputs[idx].xyzw[0].f[prim_idx] = (float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[1].f[prim_idx] = (float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[2].f[prim_idx] = (float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[3].f[prim_idx] = (float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[0].f[prim_idx] =
(float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[1].f[prim_idx] =
(float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[2].f[prim_idx] =
(float)shader->in_prim_idx;
machine->Inputs[idx].xyzw[3].f[prim_idx] =
(float)shader->in_prim_idx;
} else {
/*debug_printf("\tSlot = %d, vs_slot = %d, idx = %d:\n",
slot, vs_slot, idx);*/
#if DEBUG_INPUTS
debug_printf("\tSlot = %d, vs_slot = %d, idx = %d:\n",
slot, vs_slot, idx);
#endif
#if 1
assert(!util_is_inf_or_nan(input[vs_slot][0]));
assert(!util_is_inf_or_nan(input[vs_slot][1]));
@@ -241,7 +250,7 @@ static void draw_fetch_gs_input(struct draw_geometry_shader *shader,
machine->Inputs[idx].xyzw[1].f[prim_idx] = input[vs_slot][1];
machine->Inputs[idx].xyzw[2].f[prim_idx] = input[vs_slot][2];
machine->Inputs[idx].xyzw[3].f[prim_idx] = input[vs_slot][3];
#if 0
#if DEBUG_INPUTS
debug_printf("\t\t%f %f %f %f\n",
machine->Inputs[idx].xyzw[0].f[prim_idx],
machine->Inputs[idx].xyzw[1].f[prim_idx],
@@ -311,6 +320,23 @@ static void gs_line(struct draw_geometry_shader *shader,
gs_flush(shader, 1);
}
static void gs_line_adj(struct draw_geometry_shader *shader,
int i0, int i1, int i2, int i3)
{
unsigned indices[4];
indices[0] = i0;
indices[1] = i1;
indices[2] = i2;
indices[3] = i3;
draw_fetch_gs_input(shader, indices, 4, 0);
++shader->in_prim_idx;
gs_flush(shader, 1);
}
static void gs_tri(struct draw_geometry_shader *shader,
int i0, int i1, int i2)
{
@@ -327,24 +353,24 @@ static void gs_tri(struct draw_geometry_shader *shader,
}
#define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,i0,i1,i2)
#define LINE(gs,i0,i1) gs_line(gs,i0,i1)
#define LINE(gs,i0,i1) gs_line(gs,i0,i1)
#define LINE_ADJ(gs,i0,i1,i2,i3) gs_line_adj(gs,i0,i1,i2,i3)
#define POINT(gs,i0) gs_point(gs,i0)
#define FUNC gs_run
#define LOCAL_VARS
#include "draw_gs_tmp.h"
#undef LOCAL_VARS
#undef FUNC
#define TRIANGLE(gs,i0,i1,i2) gs_tri(gs,elts[i0],elts[i1],elts[i2])
#define LINE(gs,i0,i1) gs_line(gs,elts[i0],elts[i1])
#define LINE_ADJ(gs,i0,i1,i2,i3) gs_line_adj(gs,elts[i0], \
elts[i1], \
elts[i2],elts[i3])
#define POINT(gs,i0) gs_point(gs,elts[i0])
#define FUNC gs_run_elts
#define LOCAL_VARS \
const ushort *elts = input_prims->elts;
#include "draw_gs_tmp.h"
#undef LOCAL_VARS
#undef FUNC
int draw_geometry_shader_run(struct draw_geometry_shader *shader,
const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
src/gallium/auxiliary/draw/draw_gs_tmp.h
+8 -4
View File
@@ -95,10 +95,6 @@ static void FUNC( struct draw_geometry_shader *shader,
case PIPE_PRIM_POLYGON:
{
/* These bitflags look a little odd because we submit the
* vertices as (1,2,0) to satisfy flatshade requirements.
*/
for (i = 0; i+2 < count; i++) {
if (flatfirst) {
@@ -111,6 +107,12 @@ static void FUNC( struct draw_geometry_shader *shader,
}
break;
case PIPE_PRIM_LINES_ADJACENCY:
for (i = 0; i+3 < count; i += 4) {
LINE_ADJ( shader , i + 0 , i + 1, i + 2, i + 3 );
}
break;
default:
debug_assert(!"Unsupported primitive in geometry shader");
break;
@@ -121,4 +123,6 @@ static void FUNC( struct draw_geometry_shader *shader,
#undef TRIANGLE
#undef POINT
#undef LINE
#undef LINE_ADJ
#undef FUNC
#undef LOCAL_VARS