/*************************************************************************** Gaelco Type 1 Video Hardware Functions to emulate the video hardware of the machine ***************************************************************************/ #include "emu.h" #include "includes/gaelco.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ /* Tile format ----------- Screen 0 & 1: (32*32, 16x16 tiles) Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- -------x | flip x 0 | -------- ------x- | flip y 0 | xxxxxxxx xxxxxx-- | code 1 | -------- --xxxxxx | color 1 | -------- xx------ | priority 1 | xxxxxxxx -------- | not used */ static TILE_GET_INFO( get_tile_info_gaelco_screen0 ) { gaelco_state *state = machine.driver_data(); int data = state->m_videoram[tile_index << 1]; int data2 = state->m_videoram[(tile_index << 1) + 1]; int code = ((data & 0xfffc) >> 2); tileinfo->category = (data2 >> 6) & 0x03; SET_TILE_INFO(1, 0x4000 + code, data2 & 0x3f, TILE_FLIPYX(data & 0x03)); } static TILE_GET_INFO( get_tile_info_gaelco_screen1 ) { gaelco_state *state = machine.driver_data(); int data = state->m_videoram[(0x1000 / 2) + (tile_index << 1)]; int data2 = state->m_videoram[(0x1000 / 2) + (tile_index << 1) + 1]; int code = ((data & 0xfffc) >> 2); tileinfo->category = (data2 >> 6) & 0x03; SET_TILE_INFO(1, 0x4000 + code, data2 & 0x3f, TILE_FLIPYX(data & 0x03)); } /*************************************************************************** Memory Handlers ***************************************************************************/ WRITE16_HANDLER( gaelco_vram_w ) { gaelco_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_videoram[offset]); tilemap_mark_tile_dirty(state->m_tilemap[offset >> 11], ((offset << 1) & 0x0fff) >> 2); } /*************************************************************************** Start/Stop the video hardware emulation. ***************************************************************************/ VIDEO_START( bigkarnk ) { gaelco_state *state = machine.driver_data(); state->m_tilemap[0] = tilemap_create(machine, get_tile_info_gaelco_screen0, tilemap_scan_rows, 16, 16, 32, 32); state->m_tilemap[1] = tilemap_create(machine, get_tile_info_gaelco_screen1, tilemap_scan_rows, 16, 16, 32, 32); tilemap_set_transmask(state->m_tilemap[0], 0, 0xff01, 0x00ff); /* pens 1-7 opaque, pens 0, 8-15 transparent */ tilemap_set_transmask(state->m_tilemap[1], 0, 0xff01, 0x00ff); /* pens 1-7 opaque, pens 0, 8-15 transparent */ } VIDEO_START( maniacsq ) { gaelco_state *state = machine.driver_data(); state->m_tilemap[0] = tilemap_create(machine, get_tile_info_gaelco_screen0, tilemap_scan_rows, 16, 16, 32, 32); state->m_tilemap[1] = tilemap_create(machine, get_tile_info_gaelco_screen1, tilemap_scan_rows, 16, 16, 32, 32); tilemap_set_transparent_pen(state->m_tilemap[0], 0); tilemap_set_transparent_pen(state->m_tilemap[1], 0); } /*************************************************************************** Sprites ***************************************************************************/ /* Sprite Format ------------- Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- xxxxxxxx | y position 0 | -----xxx -------- | not used 0 | ----x--- -------- | sprite size 0 | --xx---- -------- | sprite priority 0 | -x------ -------- | flipx 0 | x------- -------- | flipy 1 | xxxxxxxx xxxxxxxx | not used 2 | -------x xxxxxxxx | x position 2 | -xxxxxx- -------- | sprite color 3 | -------- ------xx | sprite code (8x8 cuadrant) 3 | xxxxxxxx xxxxxx-- | sprite code */ static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { gaelco_state *state = machine.driver_data(); int i, x, y, ex, ey; const gfx_element *gfx = machine.gfx[0]; static const int x_offset[2] = {0x0,0x2}; static const int y_offset[2] = {0x0,0x1}; for (i = 0x800 - 4 - 1; i >= 3; i -= 4) { int sx = state->m_spriteram[i + 2] & 0x01ff; int sy = (240 - (state->m_spriteram[i] & 0x00ff)) & 0x00ff; int number = state->m_spriteram[i + 3]; int color = (state->m_spriteram[i + 2] & 0x7e00) >> 9; int attr = (state->m_spriteram[i] & 0xfe00) >> 9; int priority = (state->m_spriteram[i] & 0x3000) >> 12; int xflip = attr & 0x20; int yflip = attr & 0x40; int spr_size, pri_mask; /* palettes 0x38-0x3f are used for high priority sprites in Big Karnak */ if (color >= 0x38) priority = 4; switch (priority) { case 0: pri_mask = 0xff00; break; case 1: pri_mask = 0xff00 | 0xf0f0; break; case 2: pri_mask = 0xff00 | 0xf0f0 | 0xcccc; break; case 3: pri_mask = 0xff00 | 0xf0f0 | 0xcccc | 0xaaaa; break; default: case 4: pri_mask = 0; break; } if (attr & 0x04) spr_size = 1; else { spr_size = 2; number &= (~3); } for (y = 0; y < spr_size; y++) { for (x = 0; x < spr_size; x++) { ex = xflip ? (spr_size - 1 - x) : x; ey = yflip ? (spr_size - 1 - y) : y; pdrawgfx_transpen(bitmap,cliprect,gfx,number + x_offset[ex] + y_offset[ey], color,xflip,yflip, sx-0x0f+x*8,sy+y*8, machine.priority_bitmap,pri_mask,0); } } } } /*************************************************************************** Display Refresh ***************************************************************************/ SCREEN_UPDATE( maniacsq ) { gaelco_state *state = screen->machine().driver_data(); /* set scroll registers */ tilemap_set_scrolly(state->m_tilemap[0], 0, state->m_vregs[0]); tilemap_set_scrollx(state->m_tilemap[0], 0, state->m_vregs[1] + 4); tilemap_set_scrolly(state->m_tilemap[1], 0, state->m_vregs[2]); tilemap_set_scrollx(state->m_tilemap[1], 0, state->m_vregs[3]); bitmap_fill(screen->machine().priority_bitmap, cliprect, 0); bitmap_fill(bitmap, cliprect, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], 3, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], 3, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], 2, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], 2, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], 1, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], 1, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], 0, 4); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], 0, 4); draw_sprites(screen->machine(), bitmap, cliprect); return 0; } SCREEN_UPDATE( bigkarnk ) { gaelco_state *state = screen->machine().driver_data(); /* set scroll registers */ tilemap_set_scrolly(state->m_tilemap[0], 0, state->m_vregs[0]); tilemap_set_scrollx(state->m_tilemap[0], 0, state->m_vregs[1] + 4); tilemap_set_scrolly(state->m_tilemap[1], 0, state->m_vregs[2]); tilemap_set_scrollx(state->m_tilemap[1], 0, state->m_vregs[3]); bitmap_fill(screen->machine().priority_bitmap, cliprect, 0); bitmap_fill(bitmap, cliprect, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER1 | 3, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER1 | 3, 0); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER0 | 3, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER0 | 3, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER1 | 2, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER1 | 2, 1); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER0 | 2, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER0 | 2, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER1 | 1, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER1 | 1, 2); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER0 | 1, 4); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER0 | 1, 4); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER1 | 0, 4); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER1 | 0, 4); tilemap_draw(bitmap, cliprect, state->m_tilemap[1], TILEMAP_DRAW_LAYER0 | 0, 8); tilemap_draw(bitmap, cliprect, state->m_tilemap[0], TILEMAP_DRAW_LAYER0 | 0, 8); draw_sprites(screen->machine(), bitmap, cliprect); return 0; }