#include "driver.h"
static int bgcharbank;
static tilemap *bg_tilemap, *fg_tilemap;
WRITE16_HANDLER( tigeroad_videoram_w )
{
COMBINE_DATA(&videoram16[offset]);
tilemap_mark_tile_dirty(fg_tilemap, offset);
}
WRITE16_HANDLER( tigeroad_videoctrl_w )
{
int bank;
if (ACCESSING_MSB)
{
data = (data >> 8) & 0xff;
/* bit 1 flips screen */
if (flip_screen != (data & 0x02))
{
flip_screen_set(data & 0x02);
tilemap_mark_all_tiles_dirty(ALL_TILEMAPS);
}
/* bit 2 selects bg char bank */
bank = (data & 0x04) >> 2;
if (bgcharbank != bank)
{
bgcharbank = bank;
tilemap_mark_all_tiles_dirty(bg_tilemap);
}
/* bits 4-5 are coin lockouts */
coin_lockout_w(0, !(data & 0x10));
coin_lockout_w(1, !(data & 0x20));
/* bits 6-7 are coin counters */
coin_counter_w(0, data & 0x40);
coin_counter_w(1, data & 0x80);
}
}
WRITE16_HANDLER( tigeroad_scroll_w )
{
int scroll = 0;
COMBINE_DATA(&scroll);
switch (offset)
{
case 0:
tilemap_set_scrollx(bg_tilemap, 0, scroll);
break;
case 1:
tilemap_set_scrolly(bg_tilemap, 0, -scroll - 32 * 8);
break;
}
}
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, int priority )
{
UINT16 *source = &buffered_spriteram16[spriteram_size/2] - 4;
UINT16 *finish = buffered_spriteram16;
// TODO: The Track Map should probably be drawn on top of the background tilemap...
// Also convert the below into a for loop!
while (source >= finish)
{
int tile_number = source[0];
if (tile_number != 0xfff) {
int attr = source[1];
int sy = source[2] & 0x1ff;
int sx = source[3] & 0x1ff;
int flipx = attr & 0x02;
int flipy = attr & 0x01;
int color = (attr >> 2) & 0x0f;
if (sx > 0x100) sx -= 0x200;
if (sy > 0x100) sy -= 0x200;
if (flip_screen)
{
sx = 240 - sx;
sy = 240 - sy;
flipx = !flipx;
flipy = !flipy;
}
drawgfx(bitmap, machine->gfx[2],
tile_number,
color,
flipx, flipy,
sx, 240 - sy,
cliprect,
TRANSPARENCY_PEN, 15);
}
source -= 4;
}
}
static TILE_GET_INFO( get_bg_tile_info )
{
UINT8 *tilerom = memory_region(REGION_GFX4);
int data = tilerom[tile_index];
int attr = tilerom[tile_index + 1];
int code = data + ((attr & 0xc0) << 2) + (bgcharbank << 10);
int color = attr & 0x0f;
int flags = (attr & 0x20) ? TILE_FLIPX : 0;
SET_TILE_INFO(1, code, color, flags);
tileinfo->group = (attr & 0x10) ? 1 : 0;
}
static TILE_GET_INFO( get_fg_tile_info )
{
int data = videoram16[tile_index];
int attr = data >> 8;
int code = (data & 0xff) + ((attr & 0xc0) << 2) + ((attr & 0x20) << 5);
int color = attr & 0x0f;
int flags = (attr & 0x10) ? TILE_FLIPY : 0;
SET_TILE_INFO(0, code, color, flags);
}
static TILEMAP_MAPPER( tigeroad_tilemap_scan )
{
/* logical (col,row) -> memory offset */
return 2 * (col % 8) + 16 * ((127 - row) % 8) + 128 * (col / 8) + 2048 * ((127 - row) / 8);
}
VIDEO_START( tigeroad )
{
bg_tilemap = tilemap_create(get_bg_tile_info, tigeroad_tilemap_scan,
TILEMAP_TYPE_PEN, 32, 32, 128, 128);
fg_tilemap = tilemap_create(get_fg_tile_info, tilemap_scan_rows,
TILEMAP_TYPE_PEN, 8, 8, 32, 32);
tilemap_set_transmask(bg_tilemap, 0, 0xffff, 0);
tilemap_set_transmask(bg_tilemap, 1, 0x1ff, 0xfe00);
tilemap_set_transparent_pen(fg_tilemap, 3);
}
VIDEO_UPDATE( tigeroad )
{
tilemap_draw(bitmap, cliprect, bg_tilemap, TILEMAP_DRAW_LAYER1, 0);
draw_sprites(machine, bitmap, cliprect, 0);
tilemap_draw(bitmap, cliprect, bg_tilemap, TILEMAP_DRAW_LAYER0, 1);
//draw_sprites(machine, bitmap, cliprect, 1); draw priority sprites?
tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 2);
return 0;
}
VIDEO_EOF( tigeroad )
{
buffer_spriteram16_w(0,0,0);
}