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gallium: point rast coord tweak

This commit is contained in:
Brian Paul 2008-02-29 12:22:04 -07:00
parent b8ee90e05a
commit 6da943d204
1 changed files with 11 additions and 7 deletions
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18
src/gallium/auxiliary/draw/draw_wide_point.c
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@ -109,7 +109,7 @@ static void widepoint_point( struct draw_stage *stage,
const struct widepoint_stage *wide = widepoint_stage(stage);
const boolean sprite = (boolean) stage->draw->rasterizer->point_sprite;
float half_size;
float left_adj, right_adj;
float left_adj, right_adj, bot_adj, top_adj;
struct prim_header tri;
@ -124,6 +124,8 @@ static void widepoint_point( struct draw_stage *stage,
float *pos2 = v2->data[0];
float *pos3 = v3->data[0];
const float xbias = 0.0, ybias = -0.125;
/* point size is either per-vertex or fixed size */
if (wide->psize_slot >= 0) {
half_size = 0.5f * header->v[0]->data[wide->psize_slot][0];
@ -132,20 +134,22 @@ static void widepoint_point( struct draw_stage *stage,
half_size = wide->half_point_size;
}
left_adj = -half_size; /* + 0.25f;*/
right_adj = half_size; /* + 0.25f;*/
left_adj = -half_size + xbias;
right_adj = half_size + xbias;
bot_adj = half_size + ybias;
top_adj = -half_size + ybias;
pos0[0] += left_adj;
pos0[1] -= half_size;
pos0[1] += top_adj;
pos1[0] += left_adj;
pos1[1] += half_size;
pos1[1] += bot_adj;
pos2[0] += right_adj;
pos2[1] -= half_size;
pos2[1] += top_adj;
pos3[0] += right_adj;
pos3[1] += half_size;
pos3[1] += bot_adj;
if (sprite) {
static const float tex00[4] = { 0, 0, 0, 1 };