// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Food Fight hardware ****************************************************************************/ #include "emu.h" #include "includes/foodf.h" #include "video/resnet.h" /************************************* * * Tilemap callbacks * *************************************/ TILE_GET_INFO_MEMBER(foodf_state::get_playfield_tile_info) { uint16_t data = m_playfield_tilemap->basemem_read(tile_index); int code = (data & 0xff) | ((data >> 7) & 0x100); int color = (data >> 8) & 0x3f; SET_TILE_INFO_MEMBER(0, code, color, m_playfield_flip ? (TILE_FLIPX | TILE_FLIPY) : 0); } /************************************* * * Video system start * *************************************/ void foodf_state::video_start() { static const int resistances[3] = { 1000, 470, 220 }; /* adjust the playfield for the 8 pixel offset */ m_playfield_tilemap->set_scrollx(0, -8); save_item(NAME(m_playfield_flip)); /* compute the color output resistor weights */ compute_resistor_weights(0, 255, -1.0, 3, &resistances[0], m_rweights, 0, 0, 3, &resistances[0], m_gweights, 0, 0, 2, &resistances[1], m_bweights, 0, 0); } /************************************* * * Cocktail flip * *************************************/ void foodf_state::foodf_set_flip(int flip) { if (flip != m_playfield_flip) { m_playfield_flip = flip; m_playfield_tilemap->mark_all_dirty(); } } /************************************* * * Palette RAM write * *************************************/ WRITE16_MEMBER(foodf_state::foodf_paletteram_w) { int newword, r, g, b, bit0, bit1, bit2; COMBINE_DATA(&m_paletteram[offset]); newword = m_paletteram[offset]; /* only the bottom 8 bits are used */ /* red component */ bit0 = (newword >> 0) & 0x01; bit1 = (newword >> 1) & 0x01; bit2 = (newword >> 2) & 0x01; r = combine_weights(m_rweights, bit0, bit1, bit2); /* green component */ bit0 = (newword >> 3) & 0x01; bit1 = (newword >> 4) & 0x01; bit2 = (newword >> 5) & 0x01; g = combine_weights(m_gweights, bit0, bit1, bit2); /* blue component */ bit0 = (newword >> 6) & 0x01; bit1 = (newword >> 7) & 0x01; b = combine_weights(m_bweights, bit0, bit1); m_palette->set_pen_color(offset, rgb_t(r, g, b)); } /************************************* * * Main refresh * *************************************/ uint32_t foodf_state::screen_update_foodf(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { int offs; gfx_element *gfx = m_gfxdecode->gfx(1); bitmap_ind8 &priority_bitmap = screen.priority(); uint16_t *spriteram16 = m_spriteram; /* first draw the playfield opaquely */ m_playfield_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_OPAQUE, 0); /* then draw the non-transparent parts with a priority of 1 */ priority_bitmap.fill(0); m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 1); /* draw the motion objects front-to-back */ for (offs = 0x80-2; offs >= 0x20; offs -= 2) { int data1 = spriteram16[offs]; int data2 = spriteram16[offs+1]; int pict = data1 & 0xff; int color = (data1 >> 8) & 0x1f; int xpos = (data2 >> 8) & 0xff; int ypos = (0xff - data2 - 16) & 0xff; int hflip = (data1 >> 15) & 1; int vflip = (data1 >> 14) & 1; int pri = (data1 >> 13) & 1; gfx->prio_transpen(bitmap,cliprect, pict, color, hflip, vflip, xpos, ypos, priority_bitmap, pri * 2, 0); /* draw again with wraparound (needed to get the end of level animation right) */ gfx->prio_transpen(bitmap,cliprect, pict, color, hflip, vflip, xpos - 256, ypos, priority_bitmap, pri * 2, 0); } return 0; }