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stvvdp1.cpp: fix color calculations for non-mode 5 sprites (i.e. Virtual Hydlide avatar shadow) [Angelo Salese]

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This commit is contained in:
angelosa 2018-01-07 01:45:14 +01:00
parent 42639f4ef8
commit bda2c9e861
1 changed files with 14 additions and 8 deletions
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22
src/devices/video/stvvdp1.cpp
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@ -897,7 +897,8 @@ void saturn_state::drawpixel_4bpp_trans(int x, int y, int patterndata, int offse
void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcnt)
{
int pix,mode,transmask, spd = stv2_current_sprite.CMDPMOD & 0x40;
int pix,transmask, spd = stv2_current_sprite.CMDPMOD & 0x40;
// int mode;
int mesh = stv2_current_sprite.CMDPMOD & 0x100;
int pix2;
@ -914,6 +915,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
pix = stv2_current_sprite.CMDCOLR&0xffff;
transmask = 0xffff;
#if 0
if ( pix & 0x8000 )
{
mode = 5;
@ -922,6 +924,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
{
mode = 1;
}
#endif
}
else
{
@ -932,7 +935,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
pix = m_vdp1.gfx_decode[(patterndata+offsetcnt/2) & 0xfffff];
pix = offsetcnt&1 ? (pix & 0x0f) : ((pix & 0xf0)>>4);
pix = pix+((stv2_current_sprite.CMDCOLR&0xfff0));
mode = 0;
//mode = 0;
transmask = 0xf;
break;
case 0x0008: // mode 1 16 colour lookup table mode (4bits)
@ -943,7 +946,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
((((m_vdp1_vram[(((stv2_current_sprite.CMDCOLR&0xffff)*8)>>2)+((pix2&0xfffe)/2)])) & 0x0000ffff) >> 0):
((((m_vdp1_vram[(((stv2_current_sprite.CMDCOLR&0xffff)*8)>>2)+((pix2&0xfffe)/2)])) & 0xffff0000) >> 16);
mode = 5;
//mode = 5;
transmask = 0xffff;
if ( !spd )
@ -960,7 +963,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
break;
case 0x0010: // mode 2 64 colour bank mode (8bits) (character select portraits on hanagumi)
pix = m_vdp1.gfx_decode[(patterndata+offsetcnt) & 0xfffff];
mode = 2;
//mode = 2;
pix = pix+(stv2_current_sprite.CMDCOLR&0xffc0);
transmask = 0x3f;
break;
@ -968,22 +971,22 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
pix = m_vdp1.gfx_decode[(patterndata+offsetcnt) & 0xfffff];
pix = pix+(stv2_current_sprite.CMDCOLR&0xff80);
transmask = 0x7f;
mode = 3;
//mode = 3;
break;
case 0x0020: // mode 4 256 colour bank mode (8bits) (hanagumi title)
pix = m_vdp1.gfx_decode[(patterndata+offsetcnt) & 0xfffff];
pix = pix+(stv2_current_sprite.CMDCOLR&0xff00);
transmask = 0xff;
mode = 4;
//mode = 4;
break;
case 0x0028: // mode 5 32,768 colour RGB mode (16bits)
pix = m_vdp1.gfx_decode[(patterndata+offsetcnt*2+1) & 0xfffff] | (m_vdp1.gfx_decode[(patterndata+offsetcnt*2) & 0xfffff]<<8) ;
mode = 5;
//mode = 5;
transmask = -1; /* TODO: check me */
break;
default: // other settings illegal
pix = machine().rand();
mode = 0;
//mode = 0;
transmask = 0xff;
popmessage("Illegal Sprite Mode, contact MAMEdev");
}
@ -998,7 +1001,9 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
}
/* MSBON */
// TODO: does this always applies to the frame buffer regardless of the mode?
pix |= stv2_current_sprite.CMDPMOD & 0x8000;
#if 0
if ( mode != 5 )
{
if ( (pix & transmask) || spd )
@ -1007,6 +1012,7 @@ void saturn_state::drawpixel_generic(int x, int y, int patterndata, int offsetcn
}
}
else
#endif
{
if ( (pix & transmask) || spd )
{