diff options
Diffstat (limited to 'src/mame/video/sderby.c')
-rw-r--r-- | src/mame/video/sderby.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/mame/video/sderby.c b/src/mame/video/sderby.c new file mode 100644 index 00000000000..c9cc5e5f485 --- /dev/null +++ b/src/mame/video/sderby.c @@ -0,0 +1,142 @@ +#include "driver.h" + +static tilemap *sderby_tilemap; +extern UINT16 *sderby_videoram; + +static tilemap *sderby_md_tilemap; +extern UINT16 *sderby_md_videoram; + +static tilemap *sderby_fg_tilemap; +extern UINT16 *sderby_fg_videoram; + +/* BG Layer */ + +static TILE_GET_INFO( get_sderby_tile_info ) +{ + int tileno,colour; + + tileno = sderby_videoram[tile_index*2]; + colour = sderby_videoram[tile_index*2+1] & 0x0f; + + SET_TILE_INFO(1,tileno,colour,0); +} + +WRITE16_HANDLER( sderby_videoram_w ) +{ + COMBINE_DATA(&sderby_videoram[offset]); + tilemap_mark_tile_dirty(sderby_tilemap,offset/2); +} + +/* MD Layer */ + +static TILE_GET_INFO( get_sderby_md_tile_info ) +{ + int tileno,colour; + + tileno = sderby_md_videoram[tile_index*2]; + colour = sderby_md_videoram[tile_index*2+1] & 0x0f; + + SET_TILE_INFO(1,tileno,colour+16,0); +} + +WRITE16_HANDLER( sderby_md_videoram_w ) +{ + COMBINE_DATA(&sderby_md_videoram[offset]); + tilemap_mark_tile_dirty(sderby_md_tilemap,offset/2); +} + +/* FG Layer */ + +static TILE_GET_INFO( get_sderby_fg_tile_info ) +{ + int tileno,colour; + + tileno = sderby_fg_videoram[tile_index*2]; + colour = sderby_fg_videoram[tile_index*2+1] & 0x0f; + + SET_TILE_INFO(0,tileno,colour+32,0); +} + +WRITE16_HANDLER( sderby_fg_videoram_w ) +{ + COMBINE_DATA(&sderby_fg_videoram[offset]); + tilemap_mark_tile_dirty(sderby_fg_tilemap,offset/2); +} + + +static void draw_sprites(running_machine *machine, mame_bitmap *bitmap,const rectangle *cliprect,int codeshift) +{ + int offs; + int height = machine->gfx[0]->height; + int colordiv = machine->gfx[0]->color_granularity / 16; + + for (offs = 4;offs < spriteram_size/2;offs += 4) + { + int sx,sy,code,color,flipx; + + sy = spriteram16[offs+3-4]; /* -4? what the... ??? */ + if (sy == 0x2000) return; /* end of list marker */ + + flipx = sy & 0x4000; + sx = (spriteram16[offs+1] & 0x01ff) - 16-7; + sy = (256-8-height - sy) & 0xff; + code = spriteram16[offs+2] >> codeshift; + color = (spriteram16[offs+1] & 0x3e00) >> 9; + + drawgfx(bitmap,machine->gfx[1], + code, + color/colordiv+48, + flipx,0, + sx,sy, + cliprect,TRANSPARENCY_PEN,0); + } +} + + +VIDEO_START( sderby ) +{ + sderby_tilemap = tilemap_create(get_sderby_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 16, 16,32,32); + sderby_md_tilemap = tilemap_create(get_sderby_md_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 16, 16,32,32); + + tilemap_set_transparent_pen(sderby_md_tilemap,0); + + sderby_fg_tilemap = tilemap_create(get_sderby_fg_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 8, 8,64,32); + tilemap_set_transparent_pen(sderby_fg_tilemap,0); +} + +VIDEO_UPDATE( sderby ) +{ + tilemap_draw(bitmap,cliprect,sderby_tilemap,0,0); + draw_sprites(machine, bitmap,cliprect,0); + tilemap_draw(bitmap,cliprect,sderby_md_tilemap,0,0); + tilemap_draw(bitmap,cliprect,sderby_fg_tilemap,0,0); + return 0; +} + +VIDEO_UPDATE( pmroulet ) +{ + tilemap_draw(bitmap,cliprect,sderby_tilemap,0,0); + tilemap_draw(bitmap,cliprect,sderby_md_tilemap,0,0); + draw_sprites(machine, bitmap,cliprect,0); + tilemap_draw(bitmap,cliprect,sderby_fg_tilemap,0,0); + return 0; +} + + +WRITE16_HANDLER( sderby_scroll_w ) +{ + static UINT16 scroll[6]; + + + data = COMBINE_DATA(&scroll[offset]); + + switch (offset) + { + case 0: tilemap_set_scrollx(sderby_fg_tilemap,0,data+2);break; + case 1: tilemap_set_scrolly(sderby_fg_tilemap,0,data-8);break; + case 2: tilemap_set_scrollx(sderby_md_tilemap,0,data+4);break; + case 3: tilemap_set_scrolly(sderby_md_tilemap,0,data-8);break; + case 4: tilemap_set_scrollx(sderby_tilemap,0,data+6); break; + case 5: tilemap_set_scrolly(sderby_tilemap,0,data-8); break; + } +} |