// 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" /*************************************************************************** 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; SET_TILE_INFO_MEMBER(1, code, data2 & 0x3f, TILE_FLIPYX((data2 >> 14) & 0x03)); } /*************************************************************************** Memory Handlers ***************************************************************************/ WRITE16_MEMBER(thoop2_state::vram_w) { 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 */ for (int i = 0; i < 5; i++){ m_sprite_table[i] = std::make_unique(512); save_pointer(NAME(m_sprite_table[i]), 512, i); } save_item(NAME(m_sprite_count)); } /*************************************************************************** Sprites ***************************************************************************/ void thoop2_state::sort_sprites() { m_sprite_count[0] = 0; m_sprite_count[1] = 0; m_sprite_count[2] = 0; m_sprite_count[3] = 0; m_sprite_count[4] = 0; for (int i = 3; i < (0x1000 - 6)/2; i += 4){ int color = (m_spriteram[i+2] & 0x7e00) >> 9; int priority = (m_spriteram[i] & 0x3000) >> 12; /* palettes 0x38-0x3f are used for high priority sprites in Big Karnak */ if (color >= 0x38){ m_sprite_table[4][m_sprite_count[4]] = i; m_sprite_count[4]++; } /* save sprite number in the proper array for later */ m_sprite_table[priority][m_sprite_count[priority]] = i; m_sprite_count[priority]++; } } /* 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(bitmap_ind16 &bitmap, const rectangle &cliprect, int pri) { int j, 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 (j = 0; j < m_sprite_count[pri]; j++){ int i = m_sprite_table[pri][j]; 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 xflip = attr & 0x20; int yflip = attr & 0x40; int spr_size; 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->transpen(bitmap,cliprect,number + x_offset[ex] + y_offset[ey], color,xflip,yflip, sx-0x0f+x*8,sy+y*8,0); } } } } /*************************************************************************** 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]); sort_sprites(); 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); draw_sprites(bitmap,cliprect,3); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 3,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 3,0); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 2,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 2,0); draw_sprites(bitmap,cliprect,2); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 2,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 2,0); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 1,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 1,0); draw_sprites(bitmap,cliprect,1); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 1,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 1,0); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 0,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1 | 0,0); draw_sprites(bitmap,cliprect,0); m_pant[1]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 0,0); m_pant[0]->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0 | 0,0); draw_sprites(bitmap,cliprect,4); return 0; }