/* One Shot One Kill Video Hardware */
#include "emu.h"
#include "includes/oneshot.h"
/* bg tilemap */
static TILE_GET_INFO( get_oneshot_bg_tile_info )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
int tileno = state->m_bg_videoram[tile_index * 2 + 1];
SET_TILE_INFO(0, tileno, 0, 0);
}
WRITE16_HANDLER( oneshot_bg_videoram_w )
{
oneshot_state *state = space->machine().driver_data<oneshot_state>();
COMBINE_DATA(&state->m_bg_videoram[offset]);
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
/* mid tilemap */
static TILE_GET_INFO( get_oneshot_mid_tile_info )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
int tileno = state->m_mid_videoram[tile_index * 2 + 1];
SET_TILE_INFO(0, tileno, 2, 0);
}
WRITE16_HANDLER( oneshot_mid_videoram_w )
{
oneshot_state *state = space->machine().driver_data<oneshot_state>();
COMBINE_DATA(&state->m_mid_videoram[offset]);
tilemap_mark_tile_dirty(state->m_mid_tilemap, offset / 2);
}
/* fg tilemap */
static TILE_GET_INFO( get_oneshot_fg_tile_info )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
int tileno = state->m_fg_videoram[tile_index * 2 + 1];
SET_TILE_INFO(0, tileno, 3, 0);
}
WRITE16_HANDLER( oneshot_fg_videoram_w )
{
oneshot_state *state = space->machine().driver_data<oneshot_state>();
COMBINE_DATA(&state->m_fg_videoram[offset]);
tilemap_mark_tile_dirty(state->m_fg_tilemap, offset / 2);
}
VIDEO_START( oneshot )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
state->m_bg_tilemap = tilemap_create(machine, get_oneshot_bg_tile_info, tilemap_scan_rows, 16, 16, 32, 32);
state->m_mid_tilemap = tilemap_create(machine, get_oneshot_mid_tile_info, tilemap_scan_rows, 16, 16, 32, 32);
state->m_fg_tilemap = tilemap_create(machine, get_oneshot_fg_tile_info, tilemap_scan_rows, 16, 16, 32, 32);
tilemap_set_transparent_pen(state->m_bg_tilemap, 0);
tilemap_set_transparent_pen(state->m_mid_tilemap, 0);
tilemap_set_transparent_pen(state->m_fg_tilemap, 0);
}
static void draw_crosshairs( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
//int xpos,ypos;
/* get gun raw coordinates (player 1) */
state->m_gun_x_p1 = (input_port_read(machine, "LIGHT0_X") & 0xff) * 320 / 256;
state->m_gun_y_p1 = (input_port_read(machine, "LIGHT0_Y") & 0xff) * 240 / 256;
/* compute the coordinates for drawing (from routine at 0x009ab0) */
//xpos = state->m_gun_x_p1;
//ypos = state->m_gun_y_p1;
state->m_gun_x_p1 += state->m_gun_x_shift;
state->m_gun_y_p1 -= 0x0a;
if (state->m_gun_y_p1 < 0)
state->m_gun_y_p1 = 0;
/* get gun raw coordinates (player 2) */
state->m_gun_x_p2 = (input_port_read(machine, "LIGHT1_X") & 0xff) * 320 / 256;
state->m_gun_y_p2 = (input_port_read(machine, "LIGHT1_Y") & 0xff) * 240 / 256;
/* compute the coordinates for drawing (from routine at 0x009b6e) */
//xpos = state->m_gun_x_p2;
//ypos = state->m_gun_y_p2;
state->m_gun_x_p2 += state->m_gun_x_shift - 0x0a;
if (state->m_gun_x_p2 < 0)
state->m_gun_x_p2 = 0;
}
static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
oneshot_state *state = machine.driver_data<oneshot_state>();
const UINT16 *source = state->m_sprites;
const UINT16 *finish = source + (0x1000 / 2);
const gfx_element *gfx = machine.gfx[1];
int xpos, ypos;
while (source < finish)
{
int blockx, blocky;
int num = source[1] & 0xffff;
int xsize = (source[2] & 0x000f) + 1;
int ysize = (source[3] & 0x000f) + 1;
ypos = source[3] & 0xff80;
xpos = source[2] & 0xff80;
ypos = ypos >> 7;
xpos = xpos >> 7;
if (source[0] == 0x0001)
break;
xpos -= 8;
ypos -= 6;
for (blockx = 0; blockx < xsize; blockx++)
{
for (blocky = 0; blocky < ysize; blocky++)
{
drawgfx_transpen(
bitmap,
cliprect,
gfx,
num + (blocky * xsize) + blockx,
1,
0,0,
xpos + blockx * 8, ypos + blocky * 8, 0);
drawgfx_transpen(
bitmap,
cliprect,
gfx,
num + (blocky * xsize) + blockx,
1,
0,0,
xpos + blockx * 8 - 0x200, ypos + blocky * 8, 0);
}
}
source += 0x4;
}
}
SCREEN_UPDATE( oneshot )
{
oneshot_state *state = screen->machine().driver_data<oneshot_state>();
bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine()));
tilemap_set_scrollx(state->m_mid_tilemap, 0, state->m_scroll[0] - 0x1f5);
tilemap_set_scrolly(state->m_mid_tilemap, 0, state->m_scroll[1]);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_mid_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
draw_crosshairs(screen->machine(), bitmap, cliprect);
return 0;
}
SCREEN_UPDATE( maddonna )
{
oneshot_state *state = screen->machine().driver_data<oneshot_state>();
bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine()));
tilemap_set_scrolly(state->m_mid_tilemap, 0, state->m_scroll[1]); // other registers aren't used so we don't know which layers they relate to
tilemap_draw(bitmap, cliprect, state->m_mid_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
// popmessage ("%04x %04x %04x %04x %04x %04x %04x %04x", state->m_scroll[0], state->m_scroll[1], state->m_scroll[2], state->m_scroll[3], state->m_scroll[4], state->m_scroll[5], state->m_scroll[6], state->m_scroll[7]);
return 0;
}