/*******************************************************************************
actfancr - Bryan McPhail, mish@tendril.co.uk
*******************************************************************************/
#include "driver.h"
static UINT8 actfancr_control_1[0x20],actfancr_control_2[0x20];
UINT8 *actfancr_pf1_data,*actfancr_pf2_data,*actfancr_pf1_rowscroll_data;
static tilemap *pf1_tilemap,*pf1_alt_tilemap,*pf2_tilemap;
static int flipscreen;
static TILEMAP_MAPPER( actfancr_scan )
{
/* logical (col,row) -> memory offset */
return (col & 0x0f) + ((row & 0x0f) << 4) + ((col & 0xf0) << 4);
}
static TILEMAP_MAPPER( actfancr_scan2 )
{
/* logical (col,row) -> memory offset */
return (col & 0x0f) + ((row & 0x0f) << 4) + ((row & 0x10) << 4) + ((col & 0x70) << 5);
}
static TILE_GET_INFO( get_tile_info )
{
int tile,color;
tile=actfancr_pf1_data[2*tile_index]+(actfancr_pf1_data[2*tile_index+1]<<8);
color=tile >> 12;
tile=tile&0xfff;
SET_TILE_INFO(
2,
tile,
color,
0);
}
static TILEMAP_MAPPER( triothep_scan )
{
/* logical (col,row) -> memory offset */
return (col & 0x0f) + ((row & 0x0f) << 4) + ((row & 0x10) << 4) + ((col & 0x10) << 5);
}
static TILE_GET_INFO( get_trio_tile_info )
{
int tile,color;
tile=actfancr_pf1_data[2*tile_index]+(actfancr_pf1_data[2*tile_index+1]<<8);
color=tile >> 12;
tile=tile&0xfff;
SET_TILE_INFO(
2,
tile,
color,
0);
}
static TILE_GET_INFO( get_pf2_tile_info )
{
int tile,color;
tile=actfancr_pf2_data[2*tile_index]+(actfancr_pf2_data[2*tile_index+1]<<8);
color=tile>>12;
tile=tile&0xfff;
SET_TILE_INFO(
0,
tile,
color,
0);
}
/******************************************************************************/
static void register_savestate(void)
{
state_save_register_global_array(actfancr_control_1);
state_save_register_global_array(actfancr_control_2);
}
VIDEO_START( actfancr )
{
pf1_tilemap = tilemap_create(get_tile_info,actfancr_scan,TILEMAP_TYPE_PEN,16,16,256,16);
pf1_alt_tilemap = tilemap_create(get_tile_info,actfancr_scan2,TILEMAP_TYPE_PEN,16,16,128,32);
pf2_tilemap = tilemap_create(get_pf2_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,32,32);
tilemap_set_transparent_pen(pf2_tilemap,0);
register_savestate();
}
VIDEO_START( triothep )
{
pf1_tilemap = tilemap_create(get_trio_tile_info,triothep_scan,TILEMAP_TYPE_PEN,16,16,32,32);
pf2_tilemap = tilemap_create(get_pf2_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,8,8,32,32);
tilemap_set_transparent_pen(pf2_tilemap,0);
pf1_alt_tilemap=NULL;
register_savestate();
}
/******************************************************************************/
WRITE8_HANDLER( actfancr_pf1_control_w )
{
actfancr_control_1[offset]=data;
}
WRITE8_HANDLER( actfancr_pf2_control_w )
{
actfancr_control_2[offset]=data;
}
WRITE8_HANDLER( actfancr_pf1_data_w )
{
actfancr_pf1_data[offset]=data;
tilemap_mark_tile_dirty(pf1_tilemap,offset/2);
if (pf1_alt_tilemap) tilemap_mark_tile_dirty(pf1_alt_tilemap,offset/2);
}
READ8_HANDLER( actfancr_pf1_data_r )
{
return actfancr_pf1_data[offset];
}
WRITE8_HANDLER( actfancr_pf2_data_w )
{
actfancr_pf2_data[offset]=data;
tilemap_mark_tile_dirty(pf2_tilemap,offset/2);
}
READ8_HANDLER( actfancr_pf2_data_r )
{
return actfancr_pf2_data[offset];
}
/******************************************************************************/
VIDEO_UPDATE( actfancr )
{
int offs,mult;
int scrollx=(actfancr_control_1[0x10]+(actfancr_control_1[0x11]<<8));
int scrolly=(actfancr_control_1[0x12]+(actfancr_control_1[0x13]<<8));
/* Draw playfield */
flipscreen=actfancr_control_2[0]&0x80;
tilemap_set_flip(ALL_TILEMAPS,flipscreen ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0);
tilemap_set_scrollx( pf1_tilemap,0, scrollx );
tilemap_set_scrolly( pf1_tilemap,0, scrolly );
tilemap_set_scrollx( pf1_alt_tilemap,0, scrollx );
tilemap_set_scrolly( pf1_alt_tilemap,0, scrolly );
if (actfancr_control_1[6]==1)
tilemap_draw(bitmap,cliprect,pf1_alt_tilemap,0,0);
else
tilemap_draw(bitmap,cliprect,pf1_tilemap,0,0);
/* Sprites */
for (offs = 0;offs < 0x800;offs += 8)
{
int x,y,sprite,colour,multi,fx,fy,inc,flash;
y=buffered_spriteram[offs]+(buffered_spriteram[offs+1]<<8);
if ((y&0x8000) == 0) continue;
x = buffered_spriteram[offs+4]+(buffered_spriteram[offs+5]<<8);
colour = ((x & 0xf000) >> 12);
flash=x&0x800;
if (flash && (cpu_getcurrentframe() & 1)) continue;
fx = y & 0x2000;
fy = y & 0x4000;
multi = (1 << ((y & 0x1800) >> 11)) - 1; /* 1x, 2x, 4x, 8x height */
/* multi = 0 1 3 7 */
sprite = buffered_spriteram[offs+2]+(buffered_spriteram[offs+3]<<8);
sprite &= 0x0fff;
x = x & 0x01ff;
y = y & 0x01ff;
if (x >= 256) x -= 512;
if (y >= 256) y -= 512;
x = 240 - x;
y = 240 - y;
sprite &= ~multi;
if (fy)
inc = -1;
else
{
sprite += multi;
inc = 1;
}
if (flipscreen) {
y=240-y;
x=240-x;
if (fx) fx=0; else fx=1;
if (fy) fy=0; else fy=1;
mult=16;
}
else mult=-16;
while (multi >= 0)
{
drawgfx(bitmap,machine->gfx[1],
sprite - multi * inc,
colour,
fx,fy,
x,y + mult * multi,
cliprect,TRANSPARENCY_PEN,0);
multi--;
}
}
tilemap_draw(bitmap,cliprect,pf2_tilemap,0,0);
return 0;
}
VIDEO_UPDATE( triothep )
{
int offs,i,mult;
int scrollx=(actfancr_control_1[0x10]+(actfancr_control_1[0x11]<<8));
int scrolly=(actfancr_control_1[0x12]+(actfancr_control_1[0x13]<<8));
/* Draw playfield */
flipscreen=actfancr_control_2[0]&0x80;
tilemap_set_flip(ALL_TILEMAPS,flipscreen ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0);
if (actfancr_control_2[0]&0x4) {
tilemap_set_scroll_rows(pf1_tilemap,32);
tilemap_set_scrolly( pf1_tilemap,0, scrolly );
for (i=0; i<32; i++)
tilemap_set_scrollx( pf1_tilemap,i, scrollx+(actfancr_pf1_rowscroll_data[i*2] | actfancr_pf1_rowscroll_data[i*2+1]<<8) );
}
else {
tilemap_set_scroll_rows(pf1_tilemap,1);
tilemap_set_scrollx( pf1_tilemap,0, scrollx );
tilemap_set_scrolly( pf1_tilemap,0, scrolly );
}
tilemap_draw(bitmap,cliprect,pf1_tilemap,0,0);
/* Sprites */
for (offs = 0;offs < 0x800;offs += 8)
{
int x,y,sprite,colour,multi,fx,fy,inc,flash;
y=buffered_spriteram[offs]+(buffered_spriteram[offs+1]<<8);
if ((y&0x8000) == 0) continue;
x = buffered_spriteram[offs+4]+(buffered_spriteram[offs+5]<<8);
colour = ((x & 0xf000) >> 12);
flash=x&0x800;
if (flash && (cpu_getcurrentframe() & 1)) continue;
fx = y & 0x2000;
fy = y & 0x4000;
multi = (1 << ((y & 0x1800) >> 11)) - 1; /* 1x, 2x, 4x, 8x height */
/* multi = 0 1 3 7 */
sprite = buffered_spriteram[offs+2]+(buffered_spriteram[offs+3]<<8);
sprite &= 0x0fff;
x = x & 0x01ff;
y = y & 0x01ff;
if (x >= 256) x -= 512;
if (y >= 256) y -= 512;
x = 240 - x;
y = 240 - y;
sprite &= ~multi;
if (fy)
inc = -1;
else
{
sprite += multi;
inc = 1;
}
if (flipscreen) {
y=240-y;
x=240-x;
if (fx) fx=0; else fx=1;
if (fy) fy=0; else fy=1;
mult=16;
}
else mult=-16;
while (multi >= 0)
{
drawgfx(bitmap,machine->gfx[1],
sprite - multi * inc,
colour,
fx,fy,
x,y + mult * multi,
cliprect,TRANSPARENCY_PEN,0);
multi--;
}
}
tilemap_draw(bitmap,cliprect,pf2_tilemap,0,0);
return 0;
}