#include "driver.h"
#include "taxidrvr.h"
UINT8 *taxidrvr_vram0,*taxidrvr_vram1,*taxidrvr_vram2,*taxidrvr_vram3;
UINT8 *taxidrvr_vram4,*taxidrvr_vram5,*taxidrvr_vram6,*taxidrvr_vram7;
UINT8 *taxidrvr_scroll;
int taxidrvr_bghide;
static int spritectrl[9];
WRITE8_HANDLER( taxidrvr_spritectrl_w )
{
spritectrl[offset] = data;
}
VIDEO_UPDATE( taxidrvr )
{
int offs;
int sx,sy;
if (taxidrvr_bghide)
{
fillbitmap(bitmap,machine->pens[0],cliprect);
/* kludge to fix scroll after death */
taxidrvr_scroll[0] = taxidrvr_scroll[1] = taxidrvr_scroll[2] = taxidrvr_scroll[3] = 0;
spritectrl[2] = spritectrl[5] = spritectrl[8] = 0;
}
else
{
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx(bitmap,machine->gfx[3],
taxidrvr_vram3[offs],
0,
0,0,
(sx*8-taxidrvr_scroll[0])&0xff,(sy*8-taxidrvr_scroll[1])&0xff,
cliprect,TRANSPARENCY_NONE,0);
}
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx(bitmap,machine->gfx[2],
taxidrvr_vram2[offs]+256*taxidrvr_vram2[offs+0x400],
0,
0,0,
(sx*8-taxidrvr_scroll[2])&0xff,(sy*8-taxidrvr_scroll[3])&0xff,
cliprect,TRANSPARENCY_PEN,0);
}
if (spritectrl[2] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-spritectrl[0]-256*(spritectrl[2]&1))&0x1ff;
sy = ((offs/2) / 64-spritectrl[1]-128*(spritectrl[2]&2))&0x1ff;
color = (taxidrvr_vram5[offs/4]>>(2*(offs&3)))&0x03;
if (color)
{
if (sx > 0 && sx < 256 && sy > 0 && sy < 256)
*BITMAP_ADDR16(bitmap, sy, sx) = color;
}
}
}
if (spritectrl[5] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-spritectrl[3]-256*(spritectrl[5]&1))&0x1ff;
sy = ((offs/2) / 64-spritectrl[4]-128*(spritectrl[5]&2))&0x1ff;
color = (taxidrvr_vram6[offs/4]>>(2*(offs&3)))&0x03;
if (color)
{
if (sx > 0 && sx < 256 && sy > 0 && sy < 256)
*BITMAP_ADDR16(bitmap, sy, sx) = color;
}
}
}
if (spritectrl[8] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-spritectrl[6]-256*(spritectrl[8]&1))&0x1ff;
sy = ((offs/2) / 64-spritectrl[7]-128*(spritectrl[8]&2))&0x1ff;
color = (taxidrvr_vram7[offs/4]>>(2*(offs&3)))&0x03;
if (color)
{
if (sx > 0 && sx < 256 && sy > 0 && sy < 256)
*BITMAP_ADDR16(bitmap, sy, sx) = color;
}
}
}
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx(bitmap,machine->gfx[1],
taxidrvr_vram1[offs],
0,
0,0,
sx*8,sy*8,
cliprect,TRANSPARENCY_PEN,0);
}
for (offs = 0;offs < 0x2000;offs++)
{
int color;
sx = (offs/2) % 64;
sy = (offs/2) / 64;
color = (taxidrvr_vram4[offs/4]>>(2*(offs&3)))&0x03;
if (color)
{
*BITMAP_ADDR16(bitmap, sy, sx) = 2 * color;
}
}
}
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx(bitmap,machine->gfx[0],
taxidrvr_vram0[offs],
0,
0,0,
sx*8,sy*8,
cliprect,TRANSPARENCY_PEN,0);
}
return 0;
}