diff options
Diffstat (limited to 'src/mame/video/sauro.c')
-rw-r--r-- | src/mame/video/sauro.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/mame/video/sauro.c b/src/mame/video/sauro.c new file mode 100644 index 00000000000..14715804ab9 --- /dev/null +++ b/src/mame/video/sauro.c @@ -0,0 +1,217 @@ +/*************************************************************************** + + video.c + + Functions to emulate the video hardware of the machine. + +***************************************************************************/ + +#include "driver.h" + +UINT8 *tecfri_videoram; +UINT8 *tecfri_colorram; +UINT8 *tecfri_videoram2; +UINT8 *tecfri_colorram2; + +static tilemap *bg_tilemap, *fg_tilemap; + +/* General */ + +WRITE8_HANDLER( tecfri_videoram_w ) +{ + tecfri_videoram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +WRITE8_HANDLER( tecfri_colorram_w ) +{ + tecfri_colorram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +WRITE8_HANDLER( tecfri_videoram2_w ) +{ + tecfri_videoram2[offset] = data; + tilemap_mark_tile_dirty(fg_tilemap, offset); +} + +WRITE8_HANDLER( tecfri_colorram2_w ) +{ + tecfri_colorram2[offset] = data; + tilemap_mark_tile_dirty(fg_tilemap, offset); +} + +WRITE8_HANDLER( tecfri_scroll_bg_w ) +{ + tilemap_set_scrollx(bg_tilemap, 0, data); +} + +static TILE_GET_INFO( get_tile_info_bg ) +{ + int code = tecfri_videoram[tile_index] + ((tecfri_colorram[tile_index] & 0x07) << 8); + int color = (tecfri_colorram[tile_index] >> 4) & 0x0f; + int flags = tecfri_colorram[tile_index] & 0x08 ? TILE_FLIPX : 0; + + SET_TILE_INFO(0, code, color, flags); +} + +static TILE_GET_INFO( get_tile_info_fg ) +{ + int code = tecfri_videoram2[tile_index] + ((tecfri_colorram2[tile_index] & 0x07) << 8); + int color = (tecfri_colorram2[tile_index] >> 4) & 0x0f; + int flags = tecfri_colorram2[tile_index] & 0x08 ? TILE_FLIPX : 0; + + SET_TILE_INFO(1, code, color, flags); +} + +/* Sauro */ + +static int scroll2_map [8] = {2, 1, 4, 3, 6, 5, 0, 7}; +static int scroll2_map_flip[8] = {0, 7, 2, 1, 4, 3, 6, 5}; + +WRITE8_HANDLER( sauro_scroll_fg_w ) +{ + int *map = (flip_screen ? scroll2_map_flip : scroll2_map); + int scroll = (data & 0xf8) | map[data & 7]; + + tilemap_set_scrollx(fg_tilemap, 0, scroll); +} + +VIDEO_START( sauro ) +{ + bg_tilemap = tilemap_create(get_tile_info_bg, tilemap_scan_cols, + TILEMAP_TYPE_PEN, 8, 8, 32, 32); + + fg_tilemap = tilemap_create(get_tile_info_fg, tilemap_scan_cols, + TILEMAP_TYPE_PEN, 8, 8, 32, 32); + + tilemap_set_transparent_pen(fg_tilemap, 0); +} + +static void sauro_draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect) +{ + int offs,code,sx,sy,color,flipx; + + for (offs = 3;offs < spriteram_size - 1;offs += 4) + { + sy = spriteram[offs]; + if (sy == 0xf8) continue; + + code = spriteram[offs+1] + ((spriteram[offs+3] & 0x03) << 8); + sx = spriteram[offs+2]; + sy = 236 - sy; + color = (spriteram[offs+3] >> 4) & 0x0f; + + // I'm not really sure how this bit works + if (spriteram[offs+3] & 0x08) + { + if (sx > 0xc0) + { + // Sign extend + sx = (signed int)(signed char)sx; + } + } + else + { + if (sx < 0x40) continue; + } + + flipx = spriteram[offs+3] & 0x04; + + if (flip_screen) + { + flipx = !flipx; + sx = (235 - sx) & 0xff; // The &0xff is not 100% percent correct + sy = 240 - sy; + } + + drawgfx(bitmap, machine->gfx[2], + code, + color, + flipx,flip_screen, + sx,sy, + cliprect,TRANSPARENCY_PEN,0); + } +} + +VIDEO_UPDATE( sauro ) +{ + tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); + tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 0); + sauro_draw_sprites(machine, bitmap, cliprect); + return 0; +} + +/* Tricky Doc */ + +WRITE8_HANDLER ( trckydoc_spriteram_mirror_w ) +{ + spriteram[offset] = data; +} + +VIDEO_START( trckydoc ) +{ + bg_tilemap = tilemap_create(get_tile_info_bg, tilemap_scan_cols, + TILEMAP_TYPE_PEN, 8, 8, 32, 32); +} + +static void trckydoc_draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect) +{ + int offs,code,sy,color,flipx,sx; + + /* Weird, sprites entries don't start on DWORD boundary */ + for (offs = 3;offs < spriteram_size - 1;offs += 4) + { + sy = spriteram[offs]; + + if(spriteram[offs+3] & 0x08) + { + /* needed by the elevator cable (2nd stage), balls bouncing (3rd stage) and maybe other things */ + sy += 6; + } + + code = spriteram[offs+1] + ((spriteram[offs+3] & 0x01) << 8); + + sx = spriteram[offs+2]-2; + color = (spriteram[offs+3] >> 4) & 0x0f; + + sy = 236 - sy; + + /* similar to sauro but different bit is used .. */ + if (spriteram[offs+3] & 0x02) + { + if (sx > 0xc0) + { + /* Sign extend */ + sx = (signed int)(signed char)sx; + } + } + else + { + if (sx < 0x40) continue; + } + + flipx = spriteram[offs+3] & 0x04; + + if (flip_screen) + { + flipx = !flipx; + sx = (235 - sx) & 0xff; /* The &0xff is not 100% percent correct */ + sy = 240 - sy; + } + + drawgfx(bitmap, machine->gfx[1], + code, + color, + flipx,flip_screen, + sx,sy, + cliprect,TRANSPARENCY_PEN,0); + } +} + +VIDEO_UPDATE( trckydoc ) +{ + tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); + trckydoc_draw_sprites(machine, bitmap, cliprect); + return 0; +} |