// license:BSD-3-Clause // copyright-holders:Zsolt Vasvari /*************************************************************************** sauro.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/sauro.h" /* General */ WRITE8_MEMBER(sauro_state::videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(sauro_state::colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(sauro_state::sauro_videoram2_w) { m_videoram2[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(sauro_state::sauro_colorram2_w) { m_colorram2[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(sauro_state::scroll_bg_w) { m_bg_tilemap->set_scrollx(0, data); } TILE_GET_INFO_MEMBER(sauro_state::get_tile_info_bg) { int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x07) << 8); int color = ((m_colorram[tile_index] >> 4) & 0x0f) | m_palette_bank; int flags = m_colorram[tile_index] & 0x08 ? TILE_FLIPX : 0; SET_TILE_INFO_MEMBER(0, code, color, flags); } TILE_GET_INFO_MEMBER(sauro_state::get_tile_info_fg) { int code = m_videoram2[tile_index] + ((m_colorram2[tile_index] & 0x07) << 8); int color = ((m_colorram2[tile_index] >> 4) & 0x0f) | m_palette_bank; int flags = m_colorram2[tile_index] & 0x08 ? TILE_FLIPX : 0; SET_TILE_INFO_MEMBER(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}; WRITE_LINE_MEMBER(sauro_state::sauro_palette_bank0_w) { if (state) m_palette_bank |= 0x10; else m_palette_bank &= ~0x10; machine().tilemap().mark_all_dirty(); } WRITE_LINE_MEMBER(sauro_state::sauro_palette_bank1_w) { if (state) m_palette_bank |= 0x20; else m_palette_bank &= ~0x20; machine().tilemap().mark_all_dirty(); } WRITE8_MEMBER(sauro_state::sauro_scroll_fg_w) { const int *map = (flip_screen() ? scroll2_map_flip : scroll2_map); int scroll = (data & 0xf8) | map[data & 7]; m_fg_tilemap->set_scrollx(0, scroll); } VIDEO_START_MEMBER(sauro_state,sauro) { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(sauro_state::get_tile_info_bg)), TILEMAP_SCAN_COLS, 8, 8, 32, 32); m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(sauro_state::get_tile_info_fg)), TILEMAP_SCAN_COLS, 8, 8, 32, 32); m_fg_tilemap->set_transparent_pen(0); m_palette_bank = 0; save_item(NAME(m_palette_bank)); } void sauro_state::sauro_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect) { uint8_t *spriteram = m_spriteram; int offs,code,sx,sy,color,flipx; int flipy = flip_screen(); for (offs = 3; offs < m_spriteram.bytes() - 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) | 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; } m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx,sy,0); } } uint32_t sauro_state::screen_update_sauro(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0); sauro_draw_sprites(bitmap, cliprect); return 0; } /* Tricky Doc */ VIDEO_START_MEMBER(sauro_state,trckydoc) { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(sauro_state::get_tile_info_bg)), TILEMAP_SCAN_COLS, 8, 8, 32, 32); } void sauro_state::trckydoc_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect) { uint8_t *spriteram = m_spriteram; int offs,code,sy,color,flipx,sx; int flipy = flip_screen(); /* Weird, sprites entries don't start on DWORD boundary */ for (offs = 3; offs < m_spriteram.bytes() - 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; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx,sy,0); } } uint32_t sauro_state::screen_update_trckydoc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); trckydoc_draw_sprites(bitmap, cliprect); return 0; }