// license:BSD-3-Clause // copyright-holders:Manuel Abadia, David Haywood /*************************************************************************** splash.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/splash.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ /* Tile format ----------- Tilemap 0: (64*32, 8x8 tiles) Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- xxxxxxxx | sprite code (low 8 bits) 0 | ----xxxx -------- | sprite code (high 4 bits) 0 | xxxx---- -------- | color Tilemap 1: (32*32, 16x16 tiles) Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- -------x | flip y 0 | -------- ------x- | flip x 0 | -------- xxxxxx-- | sprite code (low 6 bits) 0 | ----xxxx -------- | sprite code (high 4 bits) 0 | xxxx---- -------- | color */ TILE_GET_INFO_MEMBER(splash_state::get_tile_info_tilemap0) { int data = m_videoram[tile_index]; int attr = data >> 8; int code = data & 0xff; SET_TILE_INFO_MEMBER(0, code + ((0x20 + (attr & 0x0f)) << 8), (attr & 0xf0) >> 4, 0); } TILE_GET_INFO_MEMBER(splash_state::get_tile_info_tilemap1) { int data = m_videoram[(0x1000/2) + tile_index]; int attr = data >> 8; int code = data & 0xff; SET_TILE_INFO_MEMBER(1, (code >> 2) + ((0x30 + (attr & 0x0f)) << 6), (attr & 0xf0) >> 4, TILE_FLIPXY(code & 0x03)); } /*************************************************************************** Memory Handlers ***************************************************************************/ WRITE16_MEMBER(splash_state::vram_w) { COMBINE_DATA(&m_videoram[offset]); m_bg_tilemap[offset >> 11]->mark_tile_dirty(((offset << 1) & 0x0fff) >> 1); } void splash_state::draw_bitmap(bitmap_ind16 &bitmap, const rectangle &cliprect) { int colxor = 0; /* splash and some bitmap modes in roldfrog */ int swaps = 0; if (m_bitmap_type == 1) /* roldfrog */ { if (m_bitmap_mode[0] == 0x0000) { colxor = 0x7f; } else if (m_bitmap_mode[0] == 0x0100) { swaps = 1; } else if (m_bitmap_mode[0] == 0x0200) { colxor = 0x55; } else if (m_bitmap_mode[0] == 0x0300) { swaps = 2; colxor = 0x7f; } else if (m_bitmap_mode[0] == 0x0400) { swaps = 3; } else if (m_bitmap_mode[0] == 0x0500) { swaps = 4; } else if (m_bitmap_mode[0] == 0x0600) { swaps = 5; colxor = 0x7f; } else if (m_bitmap_mode[0] == 0x0700) { swaps = 6; colxor = 0x55; } } int count = 0; for (int sy=0;sy<256;sy++) { for (int sx=0;sx<512;sx++) { int color = m_pixelram[count]&0xff; count++; switch (swaps) { case 1: color = bitswap<8>(color,7,0,1,2,3,4,5,6); break; case 2: color = bitswap<8>(color,7,4,6,5,1,0,3,2); break; case 3: color = bitswap<8>(color,7,3,2,1,0,6,5,4); break; case 4: color = bitswap<8>(color,7,6,4,2,0,5,3,1); break; case 5: color = bitswap<8>(color,7,0,6,5,4,3,2,1); break; case 6: color = bitswap<8>(color,7,4,3,2,1,0,6,5); break; } if (sy >= cliprect.min_y && sy <= cliprect.max_y && sx-9 >= cliprect.min_x && sx-9 <= cliprect.max_x) bitmap.pix16(sy, sx-9) = 0x300+(color^colxor); } } } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ void splash_state::video_start() { m_bg_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(splash_state::get_tile_info_tilemap0)), TILEMAP_SCAN_ROWS, 8, 8, 64, 32); m_bg_tilemap[1] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(splash_state::get_tile_info_tilemap1)), TILEMAP_SCAN_ROWS, 16, 16, 32, 32); m_bg_tilemap[0]->set_transparent_pen(0); m_bg_tilemap[1]->set_transparent_pen(0); m_bg_tilemap[0]->set_scrollx(0, 4); } /*************************************************************************** Sprites ***************************************************************************/ /* Sprite Format ------------- Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- xxxxxxxx | sprite number (low 8 bits) 0 | xxxxxxxx -------- | unused 1 | -------- xxxxxxxx | y position 1 | xxxxxxxx -------- | unused 2 | -------- xxxxxxxx | x position (low 8 bits) 2 | xxxxxxxx -------- | unused 3 | -------- ----xxxx | sprite number (high 4 bits) 3 | -------- --xx---- | unknown 3 | -------- -x------ | flip x 3 | -------- x------- | flip y 3 | xxxxxxxx -------- | unused 400| -------- ----xxxx | sprite color 400| -------- -xxx---- | unknown 400| -------- x------- | x position (high bit) 400| xxxxxxxx -------- | unused */ void splash_state::draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect) { int i; gfx_element *gfx = m_gfxdecode->gfx(1); for (i = 0x400-4; i >= 0; i -= 4) { int sx = m_spriteram[i+2] & 0xff; int sy = (240 - (m_spriteram[i+1] & 0xff)) & 0xff; int attr = m_spriteram[i+3] & 0xff; int attr2 = m_spriteram[i+0x400] >> m_sprite_attr2_shift; int number = (m_spriteram[i] & 0xff) + (attr & 0xf)*256; if (attr2 & 0x80) sx += 256; gfx->transpen(bitmap,cliprect,number, 0x10 + (attr2 & 0x0f),attr & 0x40,attr & 0x80, sx-8,sy,0); } } void funystrp_state::funystrp_draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect) { int i; gfx_element *gfx = m_gfxdecode->gfx(1); for (i = 0x400-4; i >= 0; i -= 4) { int sx = m_spriteram[i+2] & 0xff; int sy = (240 - (m_spriteram[i+1] & 0xff)) & 0xff; int attr = m_spriteram[i+3] & 0xff; int attr2 = m_spriteram[i+0x400] >> m_sprite_attr2_shift; int number = (m_spriteram[i] & 0xff) + (attr & 0xf)*256; if (attr2 & 0x80) sx += 256; gfx->transpen(bitmap,cliprect,number, (attr2 & 0x7f),attr & 0x40,attr & 0x80, sx-8,sy,0); } } /*************************************************************************** Display Refresh ***************************************************************************/ uint32_t splash_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { /* set scroll registers */ m_bg_tilemap[0]->set_scrolly(0, m_vregs[0]); m_bg_tilemap[1]->set_scrolly(0, m_vregs[1]); draw_bitmap(bitmap, cliprect); m_bg_tilemap[1]->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); m_bg_tilemap[0]->draw(screen, bitmap, cliprect, 0, 0); return 0; } uint32_t funystrp_state::screen_update_funystrp(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { /* set scroll registers */ m_bg_tilemap[0]->set_scrolly(0, m_vregs[0]); m_bg_tilemap[1]->set_scrolly(0, m_vregs[1]); draw_bitmap(bitmap, cliprect); m_bg_tilemap[1]->draw(screen, bitmap, cliprect, 0, 0); /*Sprite chip is similar but not the same*/ funystrp_draw_sprites(bitmap, cliprect); m_bg_tilemap[0]->draw(screen, bitmap, cliprect, 0, 0); return 0; }