// license:BSD-3-Clause // copyright-holders:Manuel Abadia, Peter Ferrie /*************************************************************************** Gaelco Type 1 Video Hardware Rev B The video hardware it's nearly identical to the previous revision but it can handle more tiles and more sprites Functions to emulate the video hardware of the machine ***************************************************************************/ #include "emu.h" #include "includes/thoop2.h" #include "screen.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ /* Tile format ----------- Screen 0 & 1: (32*32, 16x16 tiles) Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- ------xx | code (high bits) 0 | xxxxxxxx xxxxxx-- | code (low bits) 1 | -------- --xxxxxx | color 1 | -------- xx------ | priority 1 | --xxxxxx -------- | not used 1 | -x------ -------- | flip x 1 | x------- -------- | flip y */ template TILE_GET_INFO_MEMBER(thoop2_state::get_tile_info) { int data = m_videoram[(Layer * 0x1000/2) + (tile_index << 1)]; int data2 = m_videoram[(Layer * 0x1000/2) + (tile_index << 1) + 1]; int code = ((data & 0xfffc) >> 2) | ((data & 0x0003) << 14); tileinfo.category = (data2 >> 6) & 0x03; tileinfo.set(1, code, data2 & 0x3f, TILE_FLIPYX((data2 >> 14) & 0x03)); } /*************************************************************************** Memory Handlers ***************************************************************************/ void thoop2_state::vram_w(offs_t offset, uint16_t data, uint16_t mem_mask) { COMBINE_DATA(&m_videoram[offset]); m_pant[offset >> 11]->mark_tile_dirty(((offset << 1) & 0x0fff) >> 2); } /*************************************************************************** Start/Stop the video hardware emulation. ***************************************************************************/ void thoop2_state::video_start() { m_pant[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(thoop2_state::get_tile_info<0>)), TILEMAP_SCAN_ROWS, 16,16, 32,32); m_pant[1] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(thoop2_state::get_tile_info<1>)), TILEMAP_SCAN_ROWS, 16,16, 32,32); m_pant[0]->set_transmask(0,0xff01,0x00ff); /* pens 1-7 opaque, pens 0, 8-15 transparent */ m_pant[1]->set_transmask(0,0xff01,0x00ff); /* pens 1-7 opaque, pens 0, 8-15 transparent */ } /*************************************************************************** Sprites ***************************************************************************/ /* Sprite Format ------------- Word | Bit(s) | Description -----+-FEDCBA98-76543210-+-------------------------- 0 | -------- xxxxxxxx | y position 0 | -----xxx -------- | not used 0 | ----x--- -------- | sprite size 0 | --xx---- -------- | sprite priority 0 | -x------ -------- | flipx 0 | x------- -------- | flipy 1 | xxxxxxxx xxxxxxxx | not used 2 | -------x xxxxxxxx | x position 2 | -xxxxxx- -------- | sprite color 3 | -------- ------xx | sprite code (high bits) 3 | xxxxxxxx xxxxxx-- | sprite code (low bits) */ void thoop2_state::draw_sprites(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int i, x, y, ex, ey; gfx_element *gfx = m_gfxdecode->gfx(0); static const int x_offset[2] = {0x0,0x2}; static const int y_offset[2] = {0x0,0x1}; for (i = 0x800 - 4 - 1; i >= 3; i -= 4) { int sx = m_spriteram[i+2] & 0x01ff; int sy = (240 - (m_spriteram[i] & 0x00ff)) & 0x00ff; int number = m_spriteram[i+3]; int color = (m_spriteram[i+2] & 0x7e00) >> 9; int attr = (m_spriteram[i] & 0xfe00) >> 9; int priority = (m_spriteram[i] & 0x3000) >> 12; int xflip = attr & 0x20; int yflip = attr & 0x40; int spr_size, pri_mask; /* palettes 0x38-0x3f are used for high priority sprites */ if (color >= 0x38) priority = 4; switch (priority) { case 0: pri_mask = 0xff00; break; case 1: pri_mask = 0xff00 | 0xf0f0; break; case 2: pri_mask = 0xff00 | 0xf0f0 | 0xcccc; break; case 3: pri_mask = 0xff00 | 0xf0f0 | 0xcccc | 0xaaaa; break; default: case 4: pri_mask = 0; break; } number |= ((number & 0x03) << 16); if (attr & 0x04) { spr_size = 1; } else { spr_size = 2; number &= (~3); } for (y = 0; y < spr_size; y++) { for (x = 0; x < spr_size; x++) { ex = xflip ? (spr_size-1-x) : x; ey = yflip ? (spr_size-1-y) : y; gfx->prio_transpen(bitmap,cliprect,number + x_offset[ex] + y_offset[ey], color,xflip,yflip, sx-0x0f+x*8,sy+y*8, screen.priority(),pri_mask,0); } } } } /*************************************************************************** Display Refresh ***************************************************************************/ uint32_t thoop2_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { /* set scroll registers */ m_pant[0]->set_scrolly(0, m_vregs[0]); m_pant[0]->set_scrollx(0, m_vregs[1]+4); m_pant[1]->set_scrolly(0, m_vregs[2]); m_pant[1]->set_scrollx(0, m_vregs[3]); screen.priority().fill(0, cliprect); bitmap.fill(0, cliprect); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 3, 0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 3, 0); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 3, 1); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 3, 1); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 2, 1); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 2, 1); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 2, 2); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 2, 2); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 1, 2); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 1, 2); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 1, 4); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 1, 4); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 0, 4); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 0, 4); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 0, 8); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 0, 8); draw_sprites(screen, bitmap, cliprect); return 0; }