/*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/sauro.h" /* General */ WRITE8_HANDLER( tecfri_videoram_w ) { sauro_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( tecfri_colorram_w ) { sauro_state *state = space->machine().driver_data(); state->m_colorram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( tecfri_videoram2_w ) { sauro_state *state = space->machine().driver_data(); state->m_videoram2[offset] = data; tilemap_mark_tile_dirty(state->m_fg_tilemap, offset); } WRITE8_HANDLER( tecfri_colorram2_w ) { sauro_state *state = space->machine().driver_data(); state->m_colorram2[offset] = data; tilemap_mark_tile_dirty(state->m_fg_tilemap, offset); } WRITE8_HANDLER( tecfri_scroll_bg_w ) { sauro_state *state = space->machine().driver_data(); tilemap_set_scrollx(state->m_bg_tilemap, 0, data); } static TILE_GET_INFO( get_tile_info_bg ) { sauro_state *state = machine.driver_data(); int code = state->m_videoram[tile_index] + ((state->m_colorram[tile_index] & 0x07) << 8); int color = ((state->m_colorram[tile_index] >> 4) & 0x0f) | state->m_palette_bank; int flags = state->m_colorram[tile_index] & 0x08 ? TILE_FLIPX : 0; SET_TILE_INFO(0, code, color, flags); } static TILE_GET_INFO( get_tile_info_fg ) { sauro_state *state = machine.driver_data(); int code = state->m_videoram2[tile_index] + ((state->m_colorram2[tile_index] & 0x07) << 8); int color = ((state->m_colorram2[tile_index] >> 4) & 0x0f) | state->m_palette_bank; int flags = state->m_colorram2[tile_index] & 0x08 ? TILE_FLIPX : 0; SET_TILE_INFO(1, code, color, flags); } /* Sauro */ static const int scroll2_map[8] = {2, 1, 4, 3, 6, 5, 0, 7}; static const int scroll2_map_flip[8] = {0, 7, 2, 1, 4, 3, 6, 5}; WRITE8_HANDLER( sauro_palette_bank_w ) { sauro_state *state = space->machine().driver_data(); state->m_palette_bank = (data & 0x03) << 4; tilemap_mark_all_tiles_dirty_all(space->machine()); } WRITE8_HANDLER( sauro_scroll_fg_w ) { sauro_state *state = space->machine().driver_data(); const int *map = (flip_screen_get(space->machine()) ? scroll2_map_flip : scroll2_map); int scroll = (data & 0xf8) | map[data & 7]; tilemap_set_scrollx(state->m_fg_tilemap, 0, scroll); } VIDEO_START( sauro ) { sauro_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_tile_info_bg, tilemap_scan_cols, 8, 8, 32, 32); state->m_fg_tilemap = tilemap_create(machine, get_tile_info_fg, tilemap_scan_cols, 8, 8, 32, 32); tilemap_set_transparent_pen(state->m_fg_tilemap, 0); state->m_palette_bank = 0; } static void sauro_draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect) { sauro_state *state = machine.driver_data(); UINT8 *spriteram = state->m_spriteram; int offs,code,sx,sy,color,flipx; int flipy = flip_screen_get(machine); for (offs = 3; offs < state->m_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) | state->m_palette_bank; // 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 (flipy) { flipx = !flipx; sx = (235 - sx) & 0xff; // The &0xff is not 100% percent correct sy = 240 - sy; } drawgfx_transpen(bitmap, cliprect, machine.gfx[2], code, color, flipx, flipy, sx,sy,0); } } SCREEN_UPDATE( sauro ) { sauro_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0); sauro_draw_sprites(screen->machine(), bitmap, cliprect); return 0; } /* Tricky Doc */ VIDEO_START( trckydoc ) { sauro_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_tile_info_bg, tilemap_scan_cols, 8, 8, 32, 32); } static void trckydoc_draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect) { sauro_state *state = machine.driver_data(); UINT8 *spriteram = state->m_spriteram; int offs,code,sy,color,flipx,sx; int flipy = flip_screen_get(machine); /* Weird, sprites entries don't start on DWORD boundary */ for (offs = 3; offs < state->m_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 (flipy) { flipx = !flipx; sx = (235 - sx) & 0xff; /* The &0xff is not 100% percent correct */ sy = 240 - sy; } drawgfx_transpen(bitmap, cliprect,machine.gfx[1], code, color, flipx, flipy, sx,sy,0); } } SCREEN_UPDATE( trckydoc ) { sauro_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); trckydoc_draw_sprites(screen->machine(), bitmap, cliprect); return 0; }