diff options
Diffstat (limited to 'src/mame/video/wc90b.c')
-rw-r--r-- | src/mame/video/wc90b.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/mame/video/wc90b.c b/src/mame/video/wc90b.c new file mode 100644 index 00000000000..e00092377c6 --- /dev/null +++ b/src/mame/video/wc90b.c @@ -0,0 +1,151 @@ +#include "driver.h" + + +UINT8 *wc90b_fgvideoram,*wc90b_bgvideoram,*wc90b_txvideoram; + +UINT8 *wc90b_scroll1x; +UINT8 *wc90b_scroll2x; + +UINT8 *wc90b_scroll1y; +UINT8 *wc90b_scroll2y; + + +static tilemap *tx_tilemap,*fg_tilemap,*bg_tilemap; + + + + +/*************************************************************************** + + Callbacks for the TileMap code + +***************************************************************************/ + +static TILE_GET_INFO( get_bg_tile_info ) +{ + int attr = wc90b_bgvideoram[tile_index]; + int tile = wc90b_bgvideoram[tile_index + 0x800]; + SET_TILE_INFO( + 9 + ((attr & 3) + ((attr >> 1) & 4)), + tile, + attr >> 4, + 0); +} + +static TILE_GET_INFO( get_fg_tile_info ) +{ + int attr = wc90b_fgvideoram[tile_index]; + int tile = wc90b_fgvideoram[tile_index + 0x800]; + SET_TILE_INFO( + 1 + ((attr & 3) + ((attr >> 1) & 4)), + tile, + attr >> 4, + 0); +} + +static TILE_GET_INFO( get_tx_tile_info ) +{ + SET_TILE_INFO( + 0, + wc90b_txvideoram[tile_index + 0x800] + ((wc90b_txvideoram[tile_index] & 0x07) << 8), + wc90b_txvideoram[tile_index] >> 4, + 0); +} + + + +/*************************************************************************** + + Start the video hardware emulation. + +***************************************************************************/ + +VIDEO_START( wc90b ) +{ + bg_tilemap = tilemap_create(get_bg_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 16,16,64,32); + fg_tilemap = tilemap_create(get_fg_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN,16,16,64,32); + tx_tilemap = tilemap_create(get_tx_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 8, 8,64,32); + + tilemap_set_transparent_pen(fg_tilemap,15); + tilemap_set_transparent_pen(tx_tilemap,15); +} + + + +/*************************************************************************** + + Memory handlers + +***************************************************************************/ + +WRITE8_HANDLER( wc90b_bgvideoram_w ) +{ + wc90b_bgvideoram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap,offset & 0x7ff); +} + +WRITE8_HANDLER( wc90b_fgvideoram_w ) +{ + wc90b_fgvideoram[offset] = data; + tilemap_mark_tile_dirty(fg_tilemap,offset & 0x7ff); +} + +WRITE8_HANDLER( wc90b_txvideoram_w ) +{ + wc90b_txvideoram[offset] = data; + tilemap_mark_tile_dirty(tx_tilemap,offset & 0x7ff); +} + + + +/*************************************************************************** + + Display refresh + +***************************************************************************/ + +static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, int priority ){ + int offs; + + /* draw all visible sprites of specified priority */ + for ( offs = spriteram_size - 8;offs >= 0;offs -= 8 ){ + + if ( ( ~( spriteram[offs+3] >> 6 ) & 3 ) == priority ) { + + if ( spriteram[offs+1] > 16 ) { /* visible */ + int code = ( spriteram[offs+3] & 0x3f ) << 4; + int bank = spriteram[offs+0]; + int flags = spriteram[offs+4]; + + code += ( bank & 0xf0 ) >> 4; + code <<= 2; + code += ( bank & 0x0f ) >> 2; + + drawgfx( bitmap,machine->gfx[ 17 ], code, + flags >> 4, /* color */ + bank&1, /* flipx */ + bank&2, /* flipy */ + spriteram[offs + 2], /* sx */ + 240 - spriteram[offs + 1], /* sy */ + cliprect,TRANSPARENCY_PEN,15 ); + } + } + } +} + +VIDEO_UPDATE( wc90b ) +{ + tilemap_set_scrollx(bg_tilemap,0,8 * wc90b_scroll2x[0] + 256); + tilemap_set_scrolly(bg_tilemap,0,wc90b_scroll2y[0] + ((wc90b_scroll2y[0] < 0x10 || wc90b_scroll2y[0] == 0xff) ? 256 : 0)); + tilemap_set_scrollx(fg_tilemap,0,8 * wc90b_scroll1x[0] + 256); + tilemap_set_scrolly(fg_tilemap,0,wc90b_scroll1y[0] + ((wc90b_scroll1y[0] < 0x10 || wc90b_scroll1y[0] == 0xff) ? 256 : 0)); + +// draw_sprites(machine, bitmap,cliprect, 3 ); + tilemap_draw(bitmap,cliprect,bg_tilemap,0,0); + draw_sprites(machine, bitmap,cliprect, 2 ); + tilemap_draw(bitmap,cliprect,fg_tilemap,0,0); + draw_sprites(machine, bitmap,cliprect, 1 ); + tilemap_draw(bitmap,cliprect,tx_tilemap,0,0); + draw_sprites(machine, bitmap,cliprect, 0 ); + return 0; +} |