// license:BSD-3-Clause // copyright-holders:Bryan McPhail /******************************************************************************* Seibu Raiden hardware Functions to emulate the video hardware *******************************************************************************/ #include "emu.h" #include "includes/raiden.h" /******************************************************************************/ WRITE16_MEMBER(raiden_state::raiden_background_w) { COMBINE_DATA(&m_back_data[offset]); m_bg_layer->mark_tile_dirty(offset); } WRITE16_MEMBER(raiden_state::raiden_foreground_w) { COMBINE_DATA(&m_fore_data[offset]); m_fg_layer->mark_tile_dirty(offset); } WRITE16_MEMBER(raiden_state::raiden_text_w) { COMBINE_DATA(&m_videoram[offset]); m_tx_layer->mark_tile_dirty(offset); } WRITE8_MEMBER(raiden_state::raiden_control_w) { // d0: back layer disable // d1: fore layer disable // d2: text layer disable // d3: sprite layer disable // d4: unused // d5: unused // d6: flipscreen // d7: toggles, maybe spriteram bank? (for buffering) m_bg_layer_enabled = ~data & 0x01; m_fg_layer_enabled = ~data & 0x02; m_tx_layer_enabled = ~data & 0x04; m_sp_layer_enabled = ~data & 0x08; m_flipscreen = data & 0x40; machine().tilemap().set_flip_all(m_flipscreen ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0); } WRITE8_MEMBER(raiden_state::raidenb_control_w) { // d1: flipscreen // d2: toggles, maybe spriteram bank? (for buffering) // d3: text layer disable (i guess raidenb textlayer isn't part of sei_crtc?) // other bits: unused m_tx_layer_enabled = ~data & 0x08; m_flipscreen = data & 0x02; machine().tilemap().set_flip_all(m_flipscreen ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0); } WRITE16_MEMBER(raiden_state::raidenb_layer_enable_w) { // d0: back layer disable // d1: fore layer disable // d4: sprite layer disable // other bits: unused? (d2-d3 always set, d5-d7 always clear) m_bg_layer_enabled = ~data & 0x01; m_fg_layer_enabled = ~data & 0x02; m_sp_layer_enabled = ~data & 0x10; } /******************************************************************************/ void raiden_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect, int pri_mask) { if (!m_sp_layer_enabled) return; uint16_t *sprites = m_spriteram->buffer(); gfx_element *gfx = m_gfxdecode->gfx(3); for (int offs = 0x1000/2-4; offs >= 0; offs -= 4) { /* Word #0 x------- -------- active -x------ -------- flipy --x----- -------- flipx ---x---- -------- unused ----xxxx -------- color -------- xxxxxxxx y Word #1 x------- -------- ? (set when groundboss explodes) -xxx---- -------- unused ----xxxx xxxxxxxx code Word #2 xx------ -------- priority --xxxxx- -------- unused -------x xxxxxxxx x (signed) Word #3 unused */ if (!(sprites[offs + 0] & 0x8000)) continue; int priority = sprites[offs + 2] >> 14 & 0x3; if ((priority & pri_mask) == 0) continue; int flipy = sprites[offs + 0] & 0x4000; int flipx = sprites[offs + 0] & 0x2000; int color = (sprites[offs + 0] & 0xf00) >> 8; int code = sprites[offs + 1] & 0xfff; int y = sprites[offs + 0] & 0xff; int x = sprites[offs + 2] & 0xff; if (sprites[offs + 2] & 0x100) x = -(0x100 - x); if (m_flipscreen) { x = 240 - x; y = 240 - y; flipy = !flipy; flipx = !flipx; } gfx->transpen(bitmap,cliprect, code, color, flipx, flipy, x, y, 15); } } uint32_t raiden_state::screen_update_common(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, uint16_t *scrollregs) { // set tilemaps scroll m_bg_layer->set_scrollx(0, scrollregs[0]); m_bg_layer->set_scrolly(0, scrollregs[1]); m_fg_layer->set_scrollx(0, scrollregs[2]); m_fg_layer->set_scrolly(0, scrollregs[3]); bitmap.fill(m_palette->black_pen(), cliprect); // back layer if (m_bg_layer_enabled) m_bg_layer->draw(screen, bitmap, cliprect, 0, 0); // draw sprites underneath foreground draw_sprites(bitmap, cliprect, 1); // fore layer if (m_fg_layer_enabled) m_fg_layer->draw(screen, bitmap, cliprect, 0, 0); // rest of sprites draw_sprites(bitmap, cliprect, 2); // text layer if (m_tx_layer_enabled) m_tx_layer->draw(screen, bitmap, cliprect, 0, 0); return 0; } uint32_t raiden_state::screen_update_raiden(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // set up scrollregs // scroll_ram is only 8 bits wide. 4 bytes per scroll, skip uneven ones // 00-03: 28 *0 ** ae - bg layer scroll y // 08-0b: 28 *0 ** b9 - bg layer scroll x // 10-13: 28 *0 ** ae - fg layer scroll y // 18-1b: 28 *0 ** b9 - fg layer scroll x uint16_t scrollregs[4]; scrollregs[0] = ((m_scroll_ram[0x09] & 0xf0) << 4) | ((m_scroll_ram[0x0a] & 0x7f) << 1) | ((m_scroll_ram[0x0a] & 0x80) >> 7); scrollregs[1] = ((m_scroll_ram[0x01] & 0xf0) << 4) | ((m_scroll_ram[0x02] & 0x7f) << 1) | ((m_scroll_ram[0x02] & 0x80) >> 7); scrollregs[2] = ((m_scroll_ram[0x19] & 0xf0) << 4) | ((m_scroll_ram[0x1a] & 0x7f) << 1) | ((m_scroll_ram[0x1a] & 0x80) >> 7); scrollregs[3] = ((m_scroll_ram[0x11] & 0xf0) << 4) | ((m_scroll_ram[0x12] & 0x7f) << 1) | ((m_scroll_ram[0x12] & 0x80) >> 7); return screen_update_common(screen, bitmap, cliprect, scrollregs); } uint32_t raiden_state::screen_update_raidenb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return screen_update_common(screen, bitmap, cliprect, m_raidenb_scroll_ram); } /******************************************************************************/ TILE_GET_INFO_MEMBER(raiden_state::get_back_tile_info) { int tiledata = m_back_data[tile_index]; int tile = tiledata & 0x0fff; int color = tiledata >> 12; SET_TILE_INFO_MEMBER(1, tile, color, 0); } TILE_GET_INFO_MEMBER(raiden_state::get_fore_tile_info) { int tiledata = m_fore_data[tile_index]; int tile = tiledata & 0x0fff; int color = tiledata >> 12; SET_TILE_INFO_MEMBER(2, tile, color, 0); } TILE_GET_INFO_MEMBER(raiden_state::get_text_tile_info) { int tiledata = m_videoram[tile_index]; int tile = (tiledata & 0xff) | ((tiledata >> 6) & 0x300); int color = (tiledata >> 8) & 0x0f; SET_TILE_INFO_MEMBER(0, tile, color, 0); } void raiden_state::video_start() { m_bg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_back_tile_info),this),TILEMAP_SCAN_COLS,16,16,32,32); m_fg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_fore_tile_info),this),TILEMAP_SCAN_COLS,16,16,32,32); m_tx_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_text_tile_info),this),TILEMAP_SCAN_ROWS,8, 8, 32,32); m_fg_layer->set_transparent_pen(15); m_tx_layer->set_transparent_pen(15); save_item(NAME(m_bg_layer_enabled)); save_item(NAME(m_fg_layer_enabled)); save_item(NAME(m_tx_layer_enabled)); save_item(NAME(m_sp_layer_enabled)); save_item(NAME(m_flipscreen)); } VIDEO_START_MEMBER(raiden_state,raidenb) { m_bg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_back_tile_info),this),TILEMAP_SCAN_COLS,16,16,32,32); m_fg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_fore_tile_info),this),TILEMAP_SCAN_COLS,16,16,32,32); m_tx_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(raiden_state::get_text_tile_info),this),TILEMAP_SCAN_COLS,8, 8, 32,32); m_fg_layer->set_transparent_pen(15); m_tx_layer->set_transparent_pen(15); save_item(NAME(m_bg_layer_enabled)); save_item(NAME(m_fg_layer_enabled)); save_item(NAME(m_tx_layer_enabled)); save_item(NAME(m_sp_layer_enabled)); save_item(NAME(m_flipscreen)); save_item(NAME(m_raidenb_scroll_ram)); }