/*************************************************************************** Atari Bad Lands hardware ***************************************************************************/ #include "emu.h" #include "video/atarimo.h" #include "includes/badlands.h" /************************************* * * Tilemap callbacks * *************************************/ static TILE_GET_INFO( get_playfield_tile_info ) { badlands_state *state = machine.driver_data(); UINT16 data = state->m_playfield[tile_index]; int code = (data & 0x1fff) + ((data & 0x1000) ? (state->m_playfield_tile_bank << 12) : 0); int color = (data >> 13) & 0x07; SET_TILE_INFO(0, code, color, 0); } /************************************* * * Generic video system start * *************************************/ VIDEO_START( badlands ) { static const atarimo_desc modesc = { 1, /* index to which gfx system */ 1, /* number of motion object banks */ 0, /* are the entries linked? */ 1, /* are the entries split? */ 0, /* render in reverse order? */ 0, /* render in swapped X/Y order? */ 0, /* does the neighbor bit affect the next object? */ 0, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x80, /* base palette entry */ 0x80, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0x1f }}, /* mask for the link */ {{ 0 }}, /* mask for the graphics bank */ {{ 0x0fff,0,0,0 }}, /* mask for the code index */ {{ 0 }}, /* mask for the upper code index */ {{ 0,0,0,0x0007 }}, /* mask for the color */ {{ 0,0,0,0xff80 }}, /* mask for the X position */ {{ 0,0xff80,0,0 }}, /* mask for the Y position */ {{ 0 }}, /* mask for the width, in tiles*/ {{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */ {{ 0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0,0,0,0x0008 }}, /* mask for the priority */ {{ 0 }}, /* mask for the neighbor */ {{ 0 }}, /* mask for absolute coordinates */ {{ 0 }}, /* mask for the special value */ 0, /* resulting value to indicate "special" */ 0 /* callback routine for special entries */ }; badlands_state *state = machine.driver_data(); /* initialize the playfield */ state->m_playfield_tilemap = tilemap_create(machine, get_playfield_tile_info, tilemap_scan_rows, 8,8, 64,32); /* initialize the motion objects */ atarimo_init(machine, 0, &modesc); /* save states */ state->save_item(NAME(state->m_playfield_tile_bank)); } /************************************* * * Playfield bank write handler * *************************************/ WRITE16_HANDLER( badlands_pf_bank_w ) { badlands_state *state = space->machine().driver_data(); if (ACCESSING_BITS_0_7) if (state->m_playfield_tile_bank != (data & 1)) { space->machine().primary_screen->update_partial(space->machine().primary_screen->vpos()); state->m_playfield_tile_bank = data & 1; tilemap_mark_all_tiles_dirty(state->m_playfield_tilemap); } } /************************************* * * Main refresh * *************************************/ SCREEN_UPDATE( badlands ) { badlands_state *state = screen->machine().driver_data(); atarimo_rect_list rectlist; bitmap_t *mobitmap; int x, y, r; /* draw the playfield */ tilemap_draw(bitmap, cliprect, state->m_playfield_tilemap, 0, 0); /* draw and merge the MO */ mobitmap = atarimo_render(0, cliprect, &rectlist); for (r = 0; r < rectlist.numrects; r++, rectlist.rect++) for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++) { UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y; UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y; for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++) if (mo[x]) { /* not yet verified */ if ((mo[x] & ATARIMO_PRIORITY_MASK) || !(pf[x] & 8)) pf[x] = mo[x] & ATARIMO_DATA_MASK; /* erase behind ourselves */ mo[x] = 0; } } return 0; }