// license:BSD-3-Clause // copyright-holders:Tomasz Slanina /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/ladyfrog.h" WRITE8_MEMBER(ladyfrog_state::ladyfrog_spriteram_w) { m_spriteram[offset] = data; } READ8_MEMBER(ladyfrog_state::ladyfrog_spriteram_r) { return m_spriteram[offset]; } TILE_GET_INFO_MEMBER(ladyfrog_state::get_tile_info) { int pal = m_videoram[tile_index * 2 + 1] & 0x0f; int tile = m_videoram[tile_index * 2] + ((m_videoram[tile_index * 2 + 1] & 0xc0) << 2)+ ((m_videoram[tile_index * 2 + 1] & 0x30) << 6); SET_TILE_INFO_MEMBER(0, tile + 0x1000 * m_tilebank, pal,TILE_FLIPY ); } WRITE8_MEMBER(ladyfrog_state::ladyfrog_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset >> 1); } READ8_MEMBER(ladyfrog_state::ladyfrog_videoram_r) { return m_videoram[offset]; } WRITE8_MEMBER(ladyfrog_state::ladyfrog_palette_w) { if (offset & 0x100) m_palette->write8_ext(space, (offset & 0xff) + (m_palette_bank << 8), data); else m_palette->write8(space, (offset & 0xff) + (m_palette_bank << 8), data); } READ8_MEMBER(ladyfrog_state::ladyfrog_palette_r) { if (offset & 0x100) return m_paletteram_ext[(offset & 0xff) + (m_palette_bank << 8)]; else return m_paletteram[(offset & 0xff) + (m_palette_bank << 8)]; } WRITE8_MEMBER(ladyfrog_state::ladyfrog_gfxctrl_w) { m_palette_bank = (data & 0x20) >> 5; } WRITE8_MEMBER(ladyfrog_state::ladyfrog_gfxctrl2_w) { m_tilebank = ((data & 0x18) >> 3) ^ 3; m_bg_tilemap->mark_all_dirty(); } #ifdef UNUSED_FUNCTION int gfxctrl; READ8_MEMBER(ladyfrog_state::ladyfrog_gfxctrl_r) { return gfxctrl; } #endif READ8_MEMBER(ladyfrog_state::ladyfrog_scrlram_r) { return m_scrlram[offset]; } WRITE8_MEMBER(ladyfrog_state::ladyfrog_scrlram_w) { m_scrlram[offset] = data; m_bg_tilemap->set_scrolly(offset, data); } void ladyfrog_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int i; for (i = 0; i < 0x20; i++) { int pr = m_spriteram[0x9f - i]; int offs = (pr & 0x1f) * 4; { int code, sx, sy, flipx, flipy, pal; code = m_spriteram[offs + 2] + ((m_spriteram[offs + 1] & 0x10) << 4) + m_spritetilebase; pal = m_spriteram[offs + 1] & 0x0f; sx = m_spriteram[offs + 3]; sy = 238 - m_spriteram[offs + 0]; flipx = ((m_spriteram[offs + 1] & 0x40)>>6); flipy = ((m_spriteram[offs + 1] & 0x80)>>7); m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, pal, flipx,flipy, sx,sy,15); if (m_spriteram[offs + 3] > 240) { sx = (m_spriteram[offs + 3] - 256); m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, pal, flipx,flipy, sx,sy,15); } } } } VIDEO_START_MEMBER(ladyfrog_state,ladyfrog_common) { m_spriteram = std::make_unique(160); m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(ladyfrog_state::get_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_paletteram.resize(0x200); m_paletteram_ext.resize(0x200); m_palette->basemem().set(m_paletteram, ENDIANNESS_LITTLE, 1); m_palette->extmem().set(m_paletteram_ext, ENDIANNESS_LITTLE, 1); m_bg_tilemap->set_scroll_cols(32); m_bg_tilemap->set_scrolldy(15, 15); save_pointer(NAME(m_spriteram), 160); save_item(NAME(m_paletteram)); save_item(NAME(m_paletteram_ext)); } void ladyfrog_state::video_start() { // weird, there are sprite tiles at 0x000 and 0x400, but they don't contain all the sprites! m_spritetilebase = 0x800; VIDEO_START_CALL_MEMBER(ladyfrog_common); } VIDEO_START_MEMBER(ladyfrog_state,toucheme) { m_spritetilebase = 0x000; VIDEO_START_CALL_MEMBER(ladyfrog_common); } uint32_t ladyfrog_state::screen_update_ladyfrog(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); return 0; }