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Added support for MSB enabled color calculation for sprites in STV. This improves some sprites in Soukyugurentai [Mariusz Wojcieszek]

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This commit is contained in:
mariuszw1 2011-01-04 21:14:26 +00:00
parent 6f5c23de2b
commit 57f5e4a841
1 changed files with 16 additions and 1 deletions
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17
src/mame/video/stvvdp2.c
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@ -5895,7 +5895,7 @@ static void draw_sprites(running_machine *machine, bitmap_t *bitmap, const recta
case 0x0: if ( pri <= STV_VDP2_SPCCN ) alpha_enabled = 1; break;
case 0x1: if ( pri == STV_VDP2_SPCCN ) alpha_enabled = 1; break;
case 0x2: if ( pri >= STV_VDP2_SPCCN ) alpha_enabled = 1; break;
case 0x3: /* MSBON */ break;
case 0x3: alpha_enabled = 2; sprite_shadow = 0; break;
}
}
else
@ -6055,6 +6055,13 @@ static void draw_sprites(running_machine *machine, bitmap_t *bitmap, const recta
};
ccr = sprite_ccr[ (pix >> sprite_ccrr_shift) & sprite_ccrr_mask ];
if ( alpha_enabled == 2 )
{
if ( ( pix & 0x8000 ) == 0 )
{
ccr = 0;
}
}
if ( pix & sprite_shadow )
{
@ -6200,6 +6207,14 @@ static void draw_sprites(running_machine *machine, bitmap_t *bitmap, const recta
if ( alpha_enabled )
ccr = sprite_ccr[ (pix >> sprite_ccrr_shift) & sprite_ccrr_mask ];
if ( alpha_enabled == 2 )
{
if ( ( pix & 0x8000 ) == 0 )
{
ccr = 0;
}
}
if ( pix & sprite_shadow )
{
if ( pix & ~sprite_shadow )