// license:BSD-3-Clause // copyright-holders:Mirko Buffoni /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/bombjack.h" WRITE8_MEMBER(bombjack_state::bombjack_videoram_w) { m_videoram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(bombjack_state::bombjack_colorram_w) { m_colorram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(bombjack_state::bombjack_background_w) { if (m_background_image != data) { m_background_image = data; m_bg_tilemap->mark_all_dirty(); } } WRITE8_MEMBER(bombjack_state::bombjack_flipscreen_w) { if (flip_screen() != (data & 0x01)) { flip_screen_set(data & 0x01); machine().tilemap().mark_all_dirty(); } } TILE_GET_INFO_MEMBER(bombjack_state::get_bg_tile_info) { uint8_t *tilerom = memregion("gfx4")->base(); int offs = (m_background_image & 0x07) * 0x200 + tile_index; int code = (m_background_image & 0x10) ? tilerom[offs] : 0; int attr = tilerom[offs + 0x100]; int color = attr & 0x0f; int flags = (attr & 0x80) ? TILE_FLIPY : 0; SET_TILE_INFO_MEMBER(1, code, color, flags); } TILE_GET_INFO_MEMBER(bombjack_state::get_fg_tile_info) { int code = m_videoram[tile_index] + 16 * (m_colorram[tile_index] & 0x10); int color = m_colorram[tile_index] & 0x0f; SET_TILE_INFO_MEMBER(0, code, color, 0); } void bombjack_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(bombjack_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 16, 16, 16, 16); m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(bombjack_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_fg_tilemap->set_transparent_pen(0); } void bombjack_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) { /* abbbbbbb cdefgggg hhhhhhhh iiiiiiii a use big sprites (32x32 instead of 16x16) bbbbbbb sprite code c x flip d y flip (used only in death sequence?) e ? (set when big sprites are selected) f ? (set only when the bonus (B) materializes?) gggg color hhhhhhhh x position iiiiiiii y position */ int sx,sy,flipx,flipy; sx = m_spriteram[offs + 3]; if (m_spriteram[offs] & 0x80) sy = 225 - m_spriteram[offs + 2]; else sy = 241 - m_spriteram[offs + 2]; flipx = m_spriteram[offs + 1] & 0x40; flipy = m_spriteram[offs + 1] & 0x80; if (flip_screen()) { if (m_spriteram[offs + 1] & 0x20) { sx = 224 - sx; sy = 224 - sy; } else { sx = 240 - sx; sy = 240 - sy; } flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx((m_spriteram[offs] & 0x80) ? 3 : 2)->transpen(bitmap,cliprect, m_spriteram[offs] & 0x7f, m_spriteram[offs + 1] & 0x0f, flipx,flipy, sx,sy,0); } } uint32_t bombjack_state::screen_update_bombjack(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); draw_sprites(bitmap, cliprect); return 0; }