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#include "emu.h"
#include "includes/taxidriv.h"
WRITE8_DEVICE_HANDLER( taxidriv_spritectrl_w )
{
taxidriv_state *state = device->machine().driver_data<taxidriv_state>();
state->m_spritectrl[offset] = data;
}
SCREEN_UPDATE( taxidriv )
{
taxidriv_state *state = screen->machine().driver_data<taxidriv_state>();
int offs;
int sx,sy;
if (state->m_bghide)
{
bitmap_fill(bitmap,cliprect,0);
/* kludge to fix scroll after death */
state->m_scroll[0] = state->m_scroll[1] = state->m_scroll[2] = state->m_scroll[3] = 0;
state->m_spritectrl[2] = state->m_spritectrl[5] = state->m_spritectrl[8] = 0;
}
else
{
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx_opaque(bitmap,cliprect,screen->machine().gfx[3],
state->m_vram3[offs],
0,
0,0,
(sx*8-state->m_scroll[0])&0xff,(sy*8-state->m_scroll[1])&0xff);
}
for (offs = 0;offs < 0x400;offs++)
{
sx = offs % 32;
sy = offs / 32;
drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[2],
state->m_vram2[offs]+256*state->m_vram2[offs+0x400],
0,
0,0,
(sx*8-state->m_scroll[2])&0xff,(sy*8-state->m_scroll[3])&0xff,0);
}
if (state->m_spritectrl[2] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-state->m_spritectrl[0]-256*(state->m_spritectrl[2]&1))&0x1ff;
sy = ((offs/2) / 64-state->m_spritectrl[1]-128*(state->m_spritectrl[2]&2))&0x1ff;
color = (state->m_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 (state->m_spritectrl[5] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-state->m_spritectrl[3]-256*(state->m_spritectrl[5]&1))&0x1ff;
sy = ((offs/2) / 64-state->m_spritectrl[4]-128*(state->m_spritectrl[5]&2))&0x1ff;
color = (state->m_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 (state->m_spritectrl[8] & 4)
{
for (offs = 0;offs < 0x1000;offs++)
{
int color;
sx = ((offs/2) % 64-state->m_spritectrl[6]-256*(state->m_spritectrl[8]&1))&0x1ff;
sy = ((offs/2) / 64-state->m_spritectrl[7]-128*(state->m_spritectrl[8]&2))&0x1ff;
color = (state->m_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_transpen(bitmap,cliprect,screen->machine().gfx[1],
state->m_vram1[offs],
0,
0,0,
sx*8,sy*8,0);
}
for (offs = 0;offs < 0x2000;offs++)
{
int color;
sx = (offs/2) % 64;
sy = (offs/2) / 64;
color = (state->m_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_transpen(bitmap,cliprect,screen->machine().gfx[0],
state->m_vram0[offs],
0,
0,0,
sx*8,sy*8,0);
}
return 0;
}
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