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Slight bugfix to Voodoo subpixel correction.

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This commit is contained in:
TomW 2015-03-22 13:56:03 +00:00
commit d6908a5450
1 changed files with 5 additions and 6 deletions
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11
src/vid_voodoo.c
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@ -1244,12 +1244,11 @@ static void voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, vood
x2 -= (1 << 16);
else
x -= (1 << 16);
dx = (x + 0x7f) - (params->vertexAx << 12);
dx = ((x + 0x7f) >> 16) - (((params->vertexAx << 12) + 0x7f) >> 16);
start_x2 = x + 0x7f;
x = (x + 0x7f) >> 16;
x2 = (x2 + 0x7f) >> 16;
dx = ((x + 0x7fff) >> 16) - (((params->vertexAx << 12) + 0x7fff) >> 16);
start_x2 = x + 0x7fff;
x = (x + 0x7fff) >> 16;
x2 = (x2 + 0x7fff) >> 16;
if (voodoo_output)
pclog("%03i:%03i : Ax=%08x start_x=%08x dSdX=%016llx dx=%08x s=%08x -> ", x, state->y, params->vertexAx << 8, start_x, params->tmu[0].dTdX, dx, tmu0_t);