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Cell: minor optimization for flat shading

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Brian 2008-01-28 17:32:23 -07:00 • committed by Ben Skeggs
parent 948dc8ad24
commit 5f54cfaba1
1 changed files with 28 additions and 9 deletions
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37
src/mesa/pipe/cell/spu/spu_tri.c
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@ -200,16 +200,35 @@ static INLINE void
eval_coeff( struct setup_stage *setup, uint slot,
float x, float y, float result[4][4])
{
uint i;
const float *dadx = setup->coef[slot].dadx;
const float *dady = setup->coef[slot].dady;
switch (spu.vertex_info.interp_mode[slot]) {
case INTERP_CONSTANT:
{
uint i;
for (i = 0; i < 4; i++) {
result[QUAD_TOP_LEFT][i] =
result[QUAD_TOP_RIGHT][i] =
result[QUAD_BOTTOM_LEFT][i] =
result[QUAD_BOTTOM_RIGHT][i] = setup->coef[slot].a0[i];
}
}
break;
/* loop over XYZW comps */
for (i = 0; i < 4; i++) {
result[QUAD_TOP_LEFT][i] = setup->coef[slot].a0[i] + x * dadx[i] + y * dady[i];
result[QUAD_TOP_RIGHT][i] = result[0][i] + dadx[i];
result[QUAD_BOTTOM_LEFT][i] = result[0][i] + dady[i];
result[QUAD_BOTTOM_RIGHT][i] = result[0][i] + dadx[i] + dady[i];
case INTERP_LINEAR:
/* fall-through, for now */
default:
{
uint i;
const float *dadx = setup->coef[slot].dadx;
const float *dady = setup->coef[slot].dady;
/* loop over XYZW comps */
for (i = 0; i < 4; i++) {
result[QUAD_TOP_LEFT][i] = setup->coef[slot].a0[i] + x * dadx[i] + y * dady[i];
result[QUAD_TOP_RIGHT][i] = result[0][i] + dadx[i];
result[QUAD_BOTTOM_LEFT][i] = result[0][i] + dady[i];
result[QUAD_BOTTOM_RIGHT][i] = result[0][i] + dadx[i] + dady[i];
}
}
}
}