// license:BSD-3-Clause // copyright-holders:Ernesto Corvi #include "emu.h" #include "includes/jailbrek.h" void jailbrek_state::jailbrek_palette(palette_device &palette) const { const uint8_t *color_prom = memregion("proms")->base(); // create a lookup table for the palette for (int i = 0; i < 0x20; i++) { int const r = pal4bit(color_prom[i + 0x00] >> 0); int const g = pal4bit(color_prom[i + 0x00] >> 4); int const b = pal4bit(color_prom[i + 0x20] >> 0); palette.set_indirect_color(i, rgb_t(r, g, b)); } // color_prom now points to the beginning of the lookup table color_prom += 0x40; for (int i = 0; i < 0x100; i++) { uint8_t const ctabentry = (color_prom[i] & 0x0f) | 0x10; palette.set_pen_indirect(i, ctabentry); } for (int i = 0x100; i < 0x200; i++) { uint8_t const ctabentry = color_prom[i] & 0x0f; palette.set_pen_indirect(i, ctabentry); } } WRITE8_MEMBER(jailbrek_state::videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(jailbrek_state::colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } TILE_GET_INFO_MEMBER(jailbrek_state::get_bg_tile_info) { int attr = m_colorram[tile_index]; int code = m_videoram[tile_index] + ((attr & 0xc0) << 2); int color = attr & 0x0f; SET_TILE_INFO_MEMBER(0, code, color, 0); } void jailbrek_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(jailbrek_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 64, 32); } void jailbrek_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = m_spriteram; int i; for (i = 0; i < m_spriteram.bytes(); i += 4) { int attr = spriteram[i + 1]; // attributes = ?tyxcccc int code = spriteram[i] + ((attr & 0x40) << 2); int color = attr & 0x0f; int flipx = attr & 0x10; int flipy = attr & 0x20; int sx = spriteram[i + 2] - ((attr & 0x80) << 1); int sy = spriteram[i + 3]; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(1)->transmask(bitmap,cliprect, code, color, flipx, flipy, sx, sy, m_palette->transpen_mask(*m_gfxdecode->gfx(1), color, 0)); } } uint32_t jailbrek_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int i; // added support for vertical scrolling (credits). 23/1/2002 -BR // bit 2 appears to be horizontal/vertical scroll control if (m_scroll_dir[0] & 0x04) { m_bg_tilemap->set_scroll_cols(32); m_bg_tilemap->set_scroll_rows(1); m_bg_tilemap->set_scrollx(0, 0); for (i = 0; i < 32; i++) m_bg_tilemap->set_scrolly(i, ((m_scroll_x[i + 32] << 8) + m_scroll_x[i])); } else { m_bg_tilemap->set_scroll_rows(32); m_bg_tilemap->set_scroll_cols(1); m_bg_tilemap->set_scrolly(0, 0); for (i = 0; i < 32; i++) m_bg_tilemap->set_scrollx(i, ((m_scroll_x[i + 32] << 8) + m_scroll_x[i])); } m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); return 0; }