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implement point sprite mode

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This commit is contained in:
Brian 2007-10-22 11:59:26 -06:00
parent cd4d732773
commit 22e5c4f0f0
2 changed files with 48 additions and 35 deletions
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3
src/mesa/pipe/draw/draw_validate.c
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@ -52,7 +52,8 @@ static void validate_begin( struct draw_stage *stage )
*/
if (draw->rasterizer->line_width != 1.0 ||
draw->rasterizer->point_size != 1.0) {
draw->rasterizer->point_size != 1.0 ||
draw->rasterizer->point_sprite) {
draw->pipeline.wide->next = next;
next = draw->pipeline.wide;
}

80
src/mesa/pipe/draw/draw_wide_prims.c
View file

@ -39,6 +39,9 @@ struct wide_stage {
float half_line_width;
float half_point_size;
uint texcoord[PIPE_MAX_SHADER_OUTPUTS];
uint num_texcoords;
};
@ -120,10 +123,30 @@ static void wide_line( struct draw_stage *stage,
}
static void set_texcoords(const struct wide_stage *wide,
struct vertex_header *v, const float tc[4])
{
uint i;
for (i = 0; i < wide->num_texcoords; i++) {
uint j = wide->texcoord[i];
v->data[j][0] = tc[0];
v->data[j][1] = tc[1];
v->data[j][2] = tc[2];
v->data[j][3] = tc[3];
}
}
/* If there are lots of sprite points (and why wouldn't there be?) it
* would probably be more sensible to change hardware setup to
* optimize this rather than doing the whole thing in software like
* this.
*/
static void wide_point( struct draw_stage *stage,
struct prim_header *header )
{
const struct wide_stage *wide = wide_stage(stage);
const boolean sprite = stage->draw->rasterizer->point_sprite;
float half_size = wide->half_point_size;
float left_adj, right_adj;
@ -155,6 +178,17 @@ static void wide_point( struct draw_stage *stage,
pos3[0] += right_adj;
pos3[1] += half_size;
if (sprite) {
static const float tex00[4] = { 0, 0, 0, 1 };
static const float tex01[4] = { 0, 1, 0, 1 };
static const float tex11[4] = { 1, 1, 0, 1 };
static const float tex10[4] = { 1, 0, 0, 1 };
set_texcoords( wide, v0, tex00 );
set_texcoords( wide, v1, tex01 );
set_texcoords( wide, v2, tex10 );
set_texcoords( wide, v3, tex11 );
}
tri.det = header->det; /* only the sign matters */
tri.v[0] = v0;
tri.v[1] = v2;
@ -168,36 +202,6 @@ static void wide_point( struct draw_stage *stage,
}
/* If there are lots of sprite points (and why wouldn't there be?) it
* would probably be more sensible to change hardware setup to
* optimize this rather than doing the whole thing in software like
* this.
*/
static void sprite_point( struct draw_stage *stage,
struct prim_header *header )
{
#if 0
struct vertex_header *v[4];
struct vertex_fetch *vf = stage->pipe->draw->vb.vf;
static const float tex00[4] = { 0, 0, 0, 1 };
static const float tex01[4] = { 0, 1, 0, 1 };
static const float tex11[4] = { 1, 1, 0, 1 };
static const float tex10[4] = { 1, 0, 0, 1 };
make_wide_point(stage, header->v[0], &v[0] );
set_texcoord( vf, v[0], tex00 );
set_texcoord( vf, v[1], tex01 );
set_texcoord( vf, v[2], tex10 );
set_texcoord( vf, v[3], tex11 );
quad( stage->next, v[0], v[1], v[2], v[3] );
#endif
}
static void wide_begin( struct draw_stage *stage )
{
struct wide_stage *wide = wide_stage(stage);
@ -213,16 +217,24 @@ static void wide_begin( struct draw_stage *stage )
wide->stage.line = passthrough_line;
}
if (0/*draw->state.point_sprite*/) {
wide->stage.point = sprite_point;
}
else if (draw->rasterizer->point_size != 1.0) {
if (draw->rasterizer->point_size != 1.0) {
wide->stage.point = wide_point;
}
else {
wide->stage.point = passthrough_point;
}
if (draw->rasterizer->point_sprite) {
/* find vertex shader texcoord outputs */
const struct draw_vertex_shader *vs = draw->vertex_shader;
uint i, j = 0;
for (i = 0; i < vs->state->num_outputs; i++) {
if (vs->state->output_semantic_name[i] == TGSI_SEMANTIC_GENERIC) {
wide->texcoord[j++] = i;
}
}
wide->num_texcoords = j;
}
stage->next->begin( stage->next );
}