/*************************************************************************** D-Con video hardware. ***************************************************************************/ #include "emu.h" #include "includes/dcon.h" /******************************************************************************/ READ16_HANDLER( dcon_control_r ) { dcon_state *state = space->machine().driver_data(); return state->m_enable; } WRITE16_HANDLER( dcon_control_w ) { dcon_state *state = space->machine().driver_data(); if (ACCESSING_BITS_0_7) { state->m_enable=data; if ((state->m_enable&4)==4) tilemap_set_enable(state->m_foreground_layer,0); else tilemap_set_enable(state->m_foreground_layer,1); if ((state->m_enable&2)==2) tilemap_set_enable(state->m_midground_layer,0); else tilemap_set_enable(state->m_midground_layer,1); if ((state->m_enable&1)==1) tilemap_set_enable(state->m_background_layer,0); else tilemap_set_enable(state->m_background_layer,1); } } WRITE16_HANDLER( dcon_gfxbank_w ) { dcon_state *state = space->machine().driver_data(); if (data&1) state->m_gfx_bank_select=0x1000; else state->m_gfx_bank_select=0; } WRITE16_HANDLER( dcon_background_w ) { dcon_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_back_data[offset]); tilemap_mark_tile_dirty(state->m_background_layer,offset); } WRITE16_HANDLER( dcon_foreground_w ) { dcon_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_fore_data[offset]); tilemap_mark_tile_dirty(state->m_foreground_layer,offset); } WRITE16_HANDLER( dcon_midground_w ) { dcon_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_mid_data[offset]); tilemap_mark_tile_dirty(state->m_midground_layer,offset); } WRITE16_HANDLER( dcon_text_w ) { dcon_state *state = space->machine().driver_data(); COMBINE_DATA(&state->m_textram[offset]); tilemap_mark_tile_dirty(state->m_text_layer,offset); } static TILE_GET_INFO( get_back_tile_info ) { dcon_state *state = machine.driver_data(); int tile=state->m_back_data[tile_index]; int color=(tile>>12)&0xf; tile&=0xfff; SET_TILE_INFO( 1, tile, color, 0); } static TILE_GET_INFO( get_fore_tile_info ) { dcon_state *state = machine.driver_data(); int tile=state->m_fore_data[tile_index]; int color=(tile>>12)&0xf; tile&=0xfff; SET_TILE_INFO( 2, tile, color, 0); } static TILE_GET_INFO( get_mid_tile_info ) { dcon_state *state = machine.driver_data(); int tile=state->m_mid_data[tile_index]; int color=(tile>>12)&0xf; tile&=0xfff; SET_TILE_INFO( 3, tile|state->m_gfx_bank_select, color, 0); } static TILE_GET_INFO( get_text_tile_info ) { dcon_state *state = machine.driver_data(); int tile = state->m_textram[tile_index]; int color=(tile>>12)&0xf; tile&=0xfff; SET_TILE_INFO( 0, tile, color, 0); } VIDEO_START( dcon ) { dcon_state *state = machine.driver_data(); state->m_background_layer = tilemap_create(machine, get_back_tile_info,tilemap_scan_rows, 16,16,32,32); state->m_foreground_layer = tilemap_create(machine, get_fore_tile_info,tilemap_scan_rows,16,16,32,32); state->m_midground_layer = tilemap_create(machine, get_mid_tile_info, tilemap_scan_rows,16,16,32,32); state->m_text_layer = tilemap_create(machine, get_text_tile_info,tilemap_scan_rows, 8,8,64,32); tilemap_set_transparent_pen(state->m_midground_layer,15); tilemap_set_transparent_pen(state->m_foreground_layer,15); tilemap_set_transparent_pen(state->m_text_layer,15); state->m_gfx_bank_select = 0; } static void draw_sprites(running_machine& machine, bitmap_t *bitmap,const rectangle *cliprect) { dcon_state *state = machine.driver_data(); UINT16 *spriteram16 = state->m_spriteram; int offs,fx,fy,x,y,color,sprite; int dx,dy,ax,ay,inc,pri_mask = 0; for (offs = 0;offs < 0x400;offs += 4) { if ((spriteram16[offs+0]&0x8000)!=0x8000) continue; sprite = spriteram16[offs+1]; switch((sprite>>14) & 3) { case 0: pri_mask = 0xf0; // above foreground layer break; case 1: pri_mask = 0xfc; // above midground layer break; case 2: pri_mask = 0xfe; // above background layer break; case 3: pri_mask = 0; // above text layer break; } sprite &= 0x3fff; y = spriteram16[offs+3]; x = spriteram16[offs+2]; if (x&0x8000) x=0-(0x200-(x&0x1ff)); else x&=0x1ff; if (y&0x8000) y=0-(0x200-(y&0x1ff)); else y&=0x1ff; color = spriteram16[offs+0]&0x3f; fx = spriteram16[offs+0]&0x4000; fy = spriteram16[offs+0]&0x2000; dy=((spriteram16[offs+0]&0x0380)>>7)+1; dx=((spriteram16[offs+0]&0x1c00)>>10)+1; inc = 0; for (ax=0; axmachine().driver_data(); bitmap_fill(screen->machine().priority_bitmap,cliprect,0); /* Setup the tilemaps */ tilemap_set_scrollx( state->m_background_layer,0, state->m_scroll_ram[0] ); tilemap_set_scrolly( state->m_background_layer,0, state->m_scroll_ram[1] ); tilemap_set_scrollx( state->m_midground_layer, 0, state->m_scroll_ram[2] ); tilemap_set_scrolly( state->m_midground_layer, 0, state->m_scroll_ram[3] ); tilemap_set_scrollx( state->m_foreground_layer,0, state->m_scroll_ram[4] ); tilemap_set_scrolly( state->m_foreground_layer,0, state->m_scroll_ram[5] ); if ((state->m_enable&1)!=1) tilemap_draw(bitmap,cliprect,state->m_background_layer,0,0); else bitmap_fill(bitmap,cliprect,15); /* Should always be black, not pen 15 */ tilemap_draw(bitmap,cliprect,state->m_midground_layer,0,1); tilemap_draw(bitmap,cliprect,state->m_foreground_layer,0,2); tilemap_draw(bitmap,cliprect,state->m_text_layer,0,4); draw_sprites(screen->machine(),bitmap,cliprect); return 0; } SCREEN_UPDATE( sdgndmps ) { dcon_state *state = screen->machine().driver_data(); bitmap_fill(screen->machine().priority_bitmap,cliprect,0); /* Gfx banking */ if (state->m_last_gfx_bank!=state->m_gfx_bank_select) { tilemap_mark_all_tiles_dirty(state->m_midground_layer); state->m_last_gfx_bank=state->m_gfx_bank_select; } /* Setup the tilemaps */ tilemap_set_scrollx( state->m_background_layer,0, state->m_scroll_ram[0]+128 ); tilemap_set_scrolly( state->m_background_layer,0, state->m_scroll_ram[1] ); tilemap_set_scrollx( state->m_midground_layer, 0, state->m_scroll_ram[2]+128 ); tilemap_set_scrolly( state->m_midground_layer, 0, state->m_scroll_ram[3] ); tilemap_set_scrollx( state->m_foreground_layer,0, state->m_scroll_ram[4]+128 ); tilemap_set_scrolly( state->m_foreground_layer,0, state->m_scroll_ram[5] ); tilemap_set_scrollx( state->m_text_layer,0, /*state->m_scroll_ram[6] + */ 128 ); tilemap_set_scrolly( state->m_text_layer,0, /*state->m_scroll_ram[7] + */ 0 ); if ((state->m_enable&1)!=1) tilemap_draw(bitmap,cliprect,state->m_background_layer,0,0); else bitmap_fill(bitmap,cliprect,15); /* Should always be black, not pen 15 */ tilemap_draw(bitmap,cliprect,state->m_midground_layer,0,1); tilemap_draw(bitmap,cliprect,state->m_foreground_layer,0,2); tilemap_draw(bitmap,cliprect,state->m_text_layer,0,4); draw_sprites(screen->machine(),bitmap,cliprect); return 0; }