diff options
Diffstat (limited to 'src/mame/video/segas16b.c')
-rw-r--r-- | src/mame/video/segas16b.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/mame/video/segas16b.c b/src/mame/video/segas16b.c new file mode 100644 index 00000000000..a8a0fe484ba --- /dev/null +++ b/src/mame/video/segas16b.c @@ -0,0 +1,82 @@ +/*************************************************************************** + + Sega System 16B hardware + +***************************************************************************/ + +#include "driver.h" +#include "segaic16.h" +#include "includes/system16.h" + + + +/************************************* + * + * Video startup + * + *************************************/ + +static void video_start_common(int type) +{ + /* compute palette info */ + segaic16_palette_init(0x800); + + /* initialize the tile/text layers */ + segaic16_tilemap_init(0, type, 0x000, 0, 2); + + /* initialize the sprites */ + segaic16_sprites_init(0, SEGAIC16_SPRITES_16B, 0x400, 0); +} + + +VIDEO_START( system16b ) +{ + video_start_common(SEGAIC16_TILEMAP_16B); +} + + +VIDEO_START( timscanr ) +{ + video_start_common(SEGAIC16_TILEMAP_16B_ALT); +} + + + +/************************************* + * + * Video update + * + *************************************/ + +VIDEO_UPDATE( system16b ) +{ + /* if no drawing is happening, fill with black and get out */ + if (!segaic16_display_enable) + { + fillbitmap(bitmap, get_black_pen(machine), cliprect); + return 0; + } + + /* reset priorities */ + fillbitmap(priority_bitmap, 0, cliprect); + + /* draw background opaquely first, not setting any priorities */ + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 0 | TILEMAP_DRAW_OPAQUE, 0x00); + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 1 | TILEMAP_DRAW_OPAQUE, 0x00); + + /* draw background again, just to set the priorities on non-transparent pixels */ + segaic16_tilemap_draw(machine, 0, NULL, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 0, 0x01); + segaic16_tilemap_draw(machine, 0, NULL, cliprect, SEGAIC16_TILEMAP_BACKGROUND, 1, 0x02); + + /* draw foreground */ + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_FOREGROUND, 0, 0x02); + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_FOREGROUND, 1, 0x04); + + /* text layer */ + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_TEXT, 0, 0x04); + segaic16_tilemap_draw(machine, 0, bitmap, cliprect, SEGAIC16_TILEMAP_TEXT, 1, 0x08); + + /* draw the sprites */ + segaic16_sprites_draw(0, bitmap, cliprect); + return 0; +} |