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Added Voodoo depth biasing.

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This commit is contained in:
SarahW 2016-04-08 21:40:15 +01:00
commit 74786231c5
3 changed files with 24 additions and 1 deletions
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7
src/vid_voodoo.c
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@ -594,7 +594,9 @@ enum
FBZ_DRAW_FRONT = 0x0000,
FBZ_DRAW_BACK = 0x4000,
FBZ_DRAW_MASK = 0xc000,
FBZ_DEPTH_BIAS = (1 << 16),
FBZ_PARAM_ADJUST = (1 << 26)
};
@ -1962,6 +1964,9 @@ static void voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, vood
else
new_depth = CLAMP16(state->z >> 12);
if (params->fbzMode & FBZ_DEPTH_BIAS)
new_depth = (new_depth + params->zaColor) & 0xffff;
if (params->fbzMode & FBZ_DEPTH_ENABLE)
{
uint16_t old_depth = aux_mem[x];