// license:BSD-3-Clause // copyright-holders:Ernesto Corvi #include "emu.h" #include "includes/exprraid.h" void exprraid_state::exprraid_videoram_w(offs_t offset, uint8_t data) { m_videoram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } void exprraid_state::exprraid_colorram_w(offs_t offset, uint8_t data) { m_colorram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } void exprraid_state::exprraid_flipscreen_w(uint8_t data) { if (flip_screen() != (data & 0x01)) { flip_screen_set(data & 0x01); machine().tilemap().mark_all_dirty(); } } void exprraid_state::exprraid_bgselect_w(offs_t offset, uint8_t data) { if (m_bg_index[offset] != data) { m_bg_index[offset] = data; m_bg_tilemap->mark_all_dirty(); } } void exprraid_state::exprraid_scrollx_w(offs_t offset, uint8_t data) { m_bg_tilemap->set_scrollx(offset, data); } void exprraid_state::exprraid_scrolly_w(offs_t offset, uint8_t data) { m_bg_tilemap->set_scrolly(0, data); } TILE_GET_INFO_MEMBER(exprraid_state::get_bg_tile_info) { uint8_t *tilerom = memregion("gfx4")->base(); int data, attr, bank, code, color, flags; int quadrant = 0, offs; int sx = tile_index % 32; int sy = tile_index / 32; if (sx >= 16) quadrant++; if (sy >= 16) quadrant += 2; offs = (sy % 16) * 16 + (sx % 16) + (m_bg_index[quadrant] & 0x3f) * 0x100; data = tilerom[offs]; attr = tilerom[offs + 0x4000]; bank = (2 * (attr & 0x03) + ((data & 0x80) >> 7)) + 2; code = data & 0x7f; color = (attr & 0x18) >> 3; flags = (attr & 0x04) ? TILE_FLIPX : 0; tileinfo.category = ((attr & 0x80) ? 1 : 0); tileinfo.set(bank, code, color, flags); } TILE_GET_INFO_MEMBER(exprraid_state::get_fg_tile_info) { int attr = m_colorram[tile_index]; int code = m_videoram[tile_index] + ((attr & 0x07) << 8); int color = (attr & 0x10) >> 4; tileinfo.set(0, code, color, 0); } void exprraid_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(exprraid_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 32, 32); m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(exprraid_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_bg_tilemap->set_scroll_rows(2); m_fg_tilemap->set_transparent_pen(0); } void exprraid_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; for (offs = 0; offs < m_spriteram.bytes(); offs += 4) { int attr = m_spriteram[offs + 1]; int code = m_spriteram[offs + 3] + ((attr & 0xe0) << 3); int color = (attr & 0x03) + ((attr & 0x08) >> 1); int flipx = (attr & 0x04); int flipy = 0; int sx = ((248 - m_spriteram[offs + 2]) & 0xff) - 8; int sy = m_spriteram[offs]; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); /* double height */ if (attr & 0x10) { m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code + 1, color, flipx, flipy, sx, sy + (flip_screen() ? -16 : 16), 0); } } } uint32_t exprraid_state::screen_update_exprraid(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); m_bg_tilemap->draw(screen, bitmap, cliprect, 1, 0); m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; }