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compute clipmask

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This commit is contained in:
Brian 2007-08-17 12:09:50 -06:00
parent 7668e53c8c
commit e3647578d1
1 changed files with 50 additions and 15 deletions
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65
src/mesa/pipe/softpipe/sp_draw_arrays.c
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@ -65,6 +65,32 @@ static struct softpipe_context *sp_global = NULL;
static INLINE unsigned
compute_clipmask(float cx, float cy, float cz, float cw)
{
unsigned mask;
#if defined(macintosh) || defined(__powerpc__)
/* on powerpc cliptest is 17% faster in this way. */
mask = (((cw < cx) << CLIP_RIGHT_SHIFT));
mask |= (((cw < -cx) << CLIP_LEFT_SHIFT));
mask |= (((cw < cy) << CLIP_TOP_SHIFT));
mask |= (((cw < -cy) << CLIP_BOTTOM_SHIFT));
mask |= (((cw < cz) << CLIP_FAR_SHIFT));
mask |= (((cw < -cz) << CLIP_NEAR_SHIFT));
#else /* !defined(macintosh)) */
mask = 0x0;
if (-cx + cw < 0) mask |= CLIP_RIGHT_BIT;
if ( cx + cw < 0) mask |= CLIP_LEFT_BIT;
if (-cy + cw < 0) mask |= CLIP_TOP_BIT;
if ( cy + cw < 0) mask |= CLIP_BOTTOM_BIT;
if (-cz + cw < 0) mask |= CLIP_FAR_BIT;
if ( cz + cw < 0) mask |= CLIP_NEAR_BIT;
#endif /* defined(macintosh) */
return mask;
}
/**
* Transform vertices with the current vertex program/shader
* Up to four vertices can be shaded at a time.
@ -126,6 +152,12 @@ run_vertex_program(struct draw_context *draw,
machine.Inputs[0].xyzw[1].f[j] = vIn[1]; /*Y*/
machine.Inputs[0].xyzw[2].f[j] = vIn[2]; /*Z*/
machine.Inputs[0].xyzw[3].f[j] = 1.0; /*W*/
machine.Inputs[3].xyzw[0].f[j] = cIn[0];
machine.Inputs[3].xyzw[1].f[j] = cIn[1];
machine.Inputs[3].xyzw[2].f[j] = cIn[2];
machine.Inputs[3].xyzw[3].f[j] = 1.0;
#if 0
printf("VS Input %d: %f %f %f %f\n",
j, vIn[0], vIn[1], vIn[2], 1.0);
@ -158,21 +190,24 @@ run_vertex_program(struct draw_context *draw,
for (j = 0; j < count; j++) {
float x, y, z, w;
x = outputs[0].xyzw[0].f[j];
y = outputs[0].xyzw[1].f[j];
z = outputs[0].xyzw[2].f[j];
w = outputs[0].xyzw[3].f[j];
x = vOut[j]->clip[0] = outputs[0].xyzw[0].f[j];
y = vOut[j]->clip[1] = outputs[0].xyzw[1].f[j];
z = vOut[j]->clip[2] = outputs[0].xyzw[2].f[j];
w = vOut[j]->clip[3] = outputs[0].xyzw[3].f[j];
vOut[j]->clipmask = compute_clipmask(x, y, z, w);
vOut[j]->edgeflag = 0;
/* divide by w */
x /= w;
y /= w;
z /= w;
w = 1.0 / w;
x *= w;
y *= w;
z *= w;
/* Viewport */
vOut[j]->data[0][0] = scale[0] * x + trans[0];
vOut[j]->data[0][1] = scale[1] * y + trans[1];
vOut[j]->data[0][2] = scale[2] * z + trans[2];
/* Viewport mapping */
vOut[j]->data[0][0] = x * scale[0] + trans[0];
vOut[j]->data[0][1] = y * scale[1] + trans[1];
vOut[j]->data[0][2] = z * scale[2] + trans[2];
vOut[j]->data[0][3] = w;
#if 0
printf("wincoord: %f %f %f\n",
@ -180,10 +215,10 @@ run_vertex_program(struct draw_context *draw,
vOut[j]->data[0][1],
vOut[j]->data[0][2]);
#endif
vOut[j]->data[1][0] = 1.0;
vOut[j]->data[1][1] = 1.0;
vOut[j]->data[1][2] = 1.0;
vOut[j]->data[1][3] = 1.0;
vOut[j]->data[1][0] = outputs[1].xyzw[0].f[j];
vOut[j]->data[1][1] = outputs[1].xyzw[1].f[j];
vOut[j]->data[1][2] = outputs[1].xyzw[2].f[j];
vOut[j]->data[1][3] = outputs[1].xyzw[3].f[j];
}
#if 0