// license:BSD-3-Clause // copyright-holders:Curt Coder // thanks-to:Kenneth Lin (original driver author) /*************************************************************************** jackal.cpp Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/jackal.h" void jackal_state::palette(palette_device &palette) const { uint8_t const *const color_prom = memregion("proms")->base(); for (int i = 0; i < 0x100; i++) { uint16_t const ctabentry = i | 0x100; palette.set_pen_indirect(i, ctabentry); } for (int i = 0x100; i < 0x200; i++) { uint16_t const ctabentry = color_prom[i - 0x100] & 0x0f; palette.set_pen_indirect(i, ctabentry); } for (int i = 0x200; i < 0x300; i++) { uint16_t const ctabentry = (color_prom[i - 0x100] & 0x0f) | 0x10; palette.set_pen_indirect(i, ctabentry); } } TILE_GET_INFO_MEMBER(jackal_state::get_bg_tile_info) { int attr = m_videoram[0][tile_index]; int code = m_videoram[0][0x400 + tile_index] + ((attr & 0xc0) << 2) + ((attr & 0x30) << 6); int color = 0;//attr & 0x0f; int flags = ((attr & 0x10) ? TILE_FLIPX : 0) | ((attr & 0x20) ? TILE_FLIPY : 0); tileinfo.set(0, code, color, flags); } void jackal_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(jackal_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_spritebank->configure_entry(0, m_spriteram[0]); m_spritebank->configure_entry(1, m_spriteram[1]); m_scrollbank->configure_entry(0, m_scrollram[0]); m_scrollbank->configure_entry(1, m_scrollram[1]); } void jackal_state::draw_background(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->set_scroll_rows(1); m_bg_tilemap->set_scroll_cols(1); m_bg_tilemap->set_scrolly(0, m_videoctrl[0]); m_bg_tilemap->set_scrollx(0, m_videoctrl[1]); if (m_videoctrl[2] & 0x02) { if (m_videoctrl[2] & 0x08) { m_bg_tilemap->set_scroll_rows(32); for (int i = 0; i < 32; i++) m_bg_tilemap->set_scrollx(i, m_scrollram[0][i]); } if (m_videoctrl[2] & 0x04) { m_bg_tilemap->set_scroll_cols(32); for (int i = 0; i < 32; i++) m_bg_tilemap->set_scrolly(i, m_scrollram[0][i]); } } m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); } #define DRAW_SPRITE(bank, code, sx, sy) m_gfxdecode->gfx(bank)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); void jackal_state::draw_sprites_region(bitmap_ind16 &bitmap, const rectangle &cliprect, const uint8_t *sram, int length, int bank) { for (int offs = 0; offs < length; offs += 5) { int sn1 = sram[offs]; int sn2 = sram[offs + 1]; int sy = sram[offs + 2]; int sx = sram[offs + 3]; int attr = sram[offs + 4]; int flipx = attr & 0x20; int flipy = attr & 0x40; int color = ((sn2 & 0xf0) >> 4); if (attr & 0x01) sx = sx - 256; if (sy > 0xf0) sy = sy - 256; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } if (attr & 0xc) // half-size sprite { int spritenum = sn1 * 4 + ((sn2 & (8 + 4)) >> 2) + ((sn2 & (2 + 1)) << 10); int mod = -8; if (flip_screen()) { sx += 8; sy -= 8; mod = 8; } if ((attr & 0x0c) == 0x0c) { if (flip_screen()) sy += 16; DRAW_SPRITE(bank + 1, spritenum, sx, sy) } if ((attr & 0x0c) == 0x08) { sy += 8; DRAW_SPRITE(bank + 1, spritenum, sx, sy) DRAW_SPRITE(bank + 1, spritenum - 2, sx, sy + mod) } if ((attr & 0x0c) == 0x04) { DRAW_SPRITE(bank + 1, spritenum, sx, sy) DRAW_SPRITE(bank + 1, spritenum + 1, sx + mod, sy) } } else { int spritenum = sn1 + ((sn2 & 0x03) << 8); if (attr & 0x10) { if (flip_screen()) { sx -= 16; sy -= 16; } DRAW_SPRITE(bank, spritenum, flipx ? sx+16 : sx, flipy ? sy+16 : sy) DRAW_SPRITE(bank, spritenum + 1, flipx ? sx : sx+16, flipy ? sy+16 : sy) DRAW_SPRITE(bank, spritenum + 2, flipx ? sx+16 : sx, flipy ? sy : sy+16) DRAW_SPRITE(bank, spritenum + 3, flipx ? sx : sx+16, flipy ? sy : sy+16) } else { DRAW_SPRITE(bank, spritenum, sx, sy) } } } } void jackal_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect) { draw_sprites_region(bitmap, cliprect, &m_spriteram[1][BIT(m_videoctrl[0x03], 3) * 0x800], 0x0f5, 3); draw_sprites_region(bitmap, cliprect, &m_spriteram[0][BIT(m_videoctrl[0x03], 3) * 0x800], 0x500, 1); } uint32_t jackal_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { draw_background(screen, bitmap, cliprect); draw_sprites(bitmap, cliprect); return 0; }