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Added Voodoo 2x2 dither pattern.

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This commit is contained in:
TomW 2015-04-29 21:09:17 +01:00
commit 1e5b46c077
2 changed files with 2074 additions and 8 deletions
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26
src/vid_voodoo.c
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@ -511,9 +511,10 @@ enum
FBZ_W_BUFFER = (1 << 3),
FBZ_DEPTH_ENABLE = (1 << 4),
FBZ_DITHER = 0x100,
FBZ_RGB_WMASK = (1 << 9),
FBZ_DITHER = (1 << 8),
FBZ_RGB_WMASK = (1 << 9),
FBZ_DEPTH_WMASK = (1 << 10),
FBZ_DITHER_2x2 = (1 << 11),
FBZ_DRAW_FRONT = 0x0000,
FBZ_DRAW_BACK = 0x4000,
@ -1248,7 +1249,7 @@ static inline void voodoo_get_texture(voodoo_t *voodoo, voodoo_params_t *params,
#define a_ref ( params->alphaMode >> 24)
#define depth_op ( (params->fbzMode >> 5) & 7)
#define dither ( params->fbzMode & FBZ_DITHER)
#define dither2x2 (params->fbzMode & FBZ_DITHER_2x2)
static void voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, voodoo_state_t *state, int ystart, int yend)
{
@ -1508,10 +1509,10 @@ static void voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, vood
dat = fb_mem[x];
dest_r = (dat >> 8) & 0xf8;
dest_g = (dat >> 3) & 0xf8;
dest_g = (dat >> 3) & 0xfc;
dest_b = (dat << 3) & 0xf8;
dest_r |= (dest_r >> 5);
dest_g |= (dest_g >> 5);
dest_g |= (dest_g >> 6);
dest_b |= (dest_b >> 5);
dest_a = 0xff;
@ -1971,9 +1972,18 @@ static void voodoo_half_triangle(voodoo_t *voodoo, voodoo_params_t *params, vood
{
if (dither)
{
src_r = dither_rb[src_r][state->y & 3][x & 3];
src_g = dither_g[src_g][state->y & 3][x & 3];
src_b = dither_rb[src_b][state->y & 3][x & 3];
if (dither2x2)
{
src_r = dither_rb2x2[src_r][state->y & 1][x & 1];
src_g = dither_g2x2[src_g][state->y & 1][x & 1];
src_b = dither_rb2x2[src_b][state->y & 1][x & 1];
}
else
{
src_r = dither_rb[src_r][state->y & 3][x & 3];
src_g = dither_g[src_g][state->y & 3][x & 3];
src_b = dither_rb[src_b][state->y & 3][x & 3];
}
}
else
{

2056
src/vid_voodoo_dither.h
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