diff options
Diffstat (limited to 'src/mame/video/funkybee.c')
-rw-r--r-- | src/mame/video/funkybee.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/mame/video/funkybee.c b/src/mame/video/funkybee.c new file mode 100644 index 00000000000..d03834983c9 --- /dev/null +++ b/src/mame/video/funkybee.c @@ -0,0 +1,175 @@ +/*************************************************************************** + + video.c + + Functions to emulate the video hardware of the machine. + +***************************************************************************/ + +#include "driver.h" + +static int gfx_bank; +static tilemap *bg_tilemap; + +PALETTE_INIT( funkybee ) +{ + int i; + + + /* first, the character/sprite palette */ + for (i = 0;i < 32;i++) + { + int bit0,bit1,bit2,r,g,b; + + /* red component */ + bit0 = (*color_prom >> 0) & 0x01; + bit1 = (*color_prom >> 1) & 0x01; + bit2 = (*color_prom >> 2) & 0x01; + r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; + /* green component */ + bit0 = (*color_prom >> 3) & 0x01; + bit1 = (*color_prom >> 4) & 0x01; + bit2 = (*color_prom >> 5) & 0x01; + g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; + /* blue component */ + bit0 = 0; + bit1 = (*color_prom >> 6) & 0x01; + bit2 = (*color_prom >> 7) & 0x01; + b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; + + palette_set_color(machine,i,MAKE_RGB(r,g,b)); + color_prom++; + } +} + +WRITE8_HANDLER( funkybee_videoram_w ) +{ + videoram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +WRITE8_HANDLER( funkybee_colorram_w ) +{ + colorram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +WRITE8_HANDLER( funkybee_gfx_bank_w ) +{ + if (gfx_bank != (data & 0x01)) + { + gfx_bank = data & 0x01; + tilemap_mark_all_tiles_dirty(ALL_TILEMAPS); + } +} + +WRITE8_HANDLER( funkybee_scroll_w ) +{ + tilemap_set_scrollx(bg_tilemap, 0, flip_screen ? -data : data); +} + +WRITE8_HANDLER( funkybee_flipscreen_w ) +{ + flip_screen_set(data & 0x01); +} + +static TILE_GET_INFO( get_bg_tile_info ) +{ + int code = videoram[tile_index] + ((colorram[tile_index] & 0x80) << 1); + int color = colorram[tile_index] & 0x03; + + SET_TILE_INFO(gfx_bank, code, color, 0); +} + +static TILEMAP_MAPPER( funkybee_tilemap_scan ) +{ + /* logical (col,row) -> memory offset */ + return 256 * row + col; +} + +VIDEO_START( funkybee ) +{ + bg_tilemap = tilemap_create(get_bg_tile_info, funkybee_tilemap_scan, + TILEMAP_TYPE_PEN, 8, 8, 32, 32); +} + +static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect) +{ + int offs; + + for (offs = 0x0f; offs >= 0; offs--) + { + int offs2 = offs + 0x1e00; + int attr = videoram[offs2]; + int code = (attr >> 2) | ((attr & 2) << 5); + int color = colorram[offs2 + 0x10]; + int flipx = 0; + int flipy = attr & 0x01; + int sx = videoram[offs2 + 0x10]; + int sy = 224 - colorram[offs2]; + + if (flip_screen) + { + sy += 32; + flipx = !flipx; + } + + drawgfx(bitmap,machine->gfx[2+gfx_bank], + code, color, + flipx, flipy, + sx, sy, + cliprect, TRANSPARENCY_PEN, 0); + } +} + +static void draw_columns(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect) +{ + int offs; + + for (offs = 0x1f;offs >= 0;offs--) + { + int code = videoram[0x1c00 + offs]; + int color = colorram[0x1f10] & 0x03; + int sx = videoram[0x1f10]; + int sy = offs * 8; + + if (flip_screen) + { + sx = 248 - sx; + sy = 248 - sy; + } + + drawgfx(bitmap,machine->gfx[gfx_bank], + code, color, + flip_screen, flip_screen, + sx, sy, + cliprect,TRANSPARENCY_PEN,0); + + code = videoram[0x1d00 + offs]; + color = colorram[0x1f11] & 0x03; + sx = videoram[0x1f11]; + sy = offs * 8; + + if (flip_screen) + { + sx = 248 - sx; + sy = 248 - sy; + } + + drawgfx(bitmap,machine->gfx[gfx_bank], + code, color, + flip_screen, flip_screen, + sx, sy, + cliprect,TRANSPARENCY_PEN,0); + } +} + +VIDEO_UPDATE( funkybee ) +{ + tilemap_mark_all_tiles_dirty(bg_tilemap); + + tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); + draw_sprites(machine, bitmap, cliprect); + draw_columns(machine, bitmap, cliprect); + return 0; +} |