// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Cyberball hardware ****************************************************************************/ #include "emu.h" #include "machine/atarigen.h" #include "includes/cyberbal.h" #define SCREEN_WIDTH (42*16) /************************************* * * Tilemap callbacks * *************************************/ TILE_GET_INFO_MEMBER(cyberbal_base_state::get_alpha_tile_info) { uint16_t data = m_alpha->basemem_read(tile_index); int code = data & 0xfff; int color = (data >> 12) & 0x07; SET_TILE_INFO_MEMBER(2, code, color, (data >> 15) & 1); } TILE_GET_INFO_MEMBER(cyberbal_state::get_alpha2_tile_info) { uint16_t data = m_alpha2->basemem_read(tile_index); int code = data & 0xfff; int color = (data >> 12) & 0x07; SET_TILE_INFO_MEMBER(2, code, color, (data >> 15) & 1); } TILE_GET_INFO_MEMBER(cyberbal_base_state::get_playfield_tile_info) { uint16_t data = m_playfield->basemem_read(tile_index); int code = data & 0x1fff; int color = (data >> 11) & 0x0f; SET_TILE_INFO_MEMBER(0, code, color, (data >> 15) & 1); } TILE_GET_INFO_MEMBER(cyberbal_state::get_playfield2_tile_info) { uint16_t data = m_playfield2->basemem_read(tile_index); int code = data & 0x1fff; int color = (data >> 11) & 0x0f; SET_TILE_INFO_MEMBER(0, code, color, (data >> 15) & 1); } /************************************* * * Video system start * *************************************/ const atari_motion_objects_config cyberbal_base_state::s_mob_config = { 1, /* index to which gfx system */ 1, /* number of motion object banks */ 1, /* are the entries linked? */ 0, /* are the entries split? */ 0, /* render in reverse order? */ 0, /* render in swapped X/Y order? */ 1, /* does the neighbor bit affect the next object? */ 1024, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x600, /* base palette entry */ 0x100, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0,0,0x07f8,0 }}, /* mask for the link */ {{ 0x7fff,0,0,0 }}, /* mask for the code index */ {{ 0,0,0,0x000f }}, /* mask for the color */ {{ 0,0,0,0xffc0 }}, /* mask for the X position */ {{ 0,0xff80,0,0 }}, /* mask for the Y position */ {{ 0 }}, /* mask for the width, in tiles*/ {{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */ {{ 0x8000,0,0,0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0 }}, /* mask for the priority */ {{ 0,0,0,0x0010 }}, /* mask for the neighbor */ {{ 0 }}, /* mask for absolute coordinates */ {{ 0 }}, /* mask for the special value */ 0, /* resulting value to indicate "special" */ }; void cyberbal_base_state::video_start() { /* initialize the motion objects */ m_mob->set_slipram(&m_current_slip[0]); /* save states */ save_item(NAME(m_current_slip)); save_item(NAME(m_playfield_palette_bank)); save_item(NAME(m_playfield_xscroll)); save_item(NAME(m_playfield_yscroll)); } void cyberbal_state::video_start() { m_playfield2->set_palette(*m_rpalette); m_alpha2->set_palette(*m_rpalette); cyberbal_base_state::video_start(); m_mob2->set_slipram(&m_current_slip[1]); /* adjust the sprite positions */ m_mob->set_xscroll(4); m_mob2->set_xscroll(4); } void cyberbal2p_state::video_start() { cyberbal_base_state::video_start(); /* adjust the sprite positions */ m_mob->set_xscroll(5); } /************************************* * * Periodic scanline updater * *************************************/ void cyberbal_base_state::scanline_update_one(screen_device &screen, int scanline, int i, tilemap_t &curplayfield, tilemap_device &curalpha) { /* keep in range */ int offset = ((scanline - 8) / 8) * 64 + 47; if (offset < 0) offset += 0x800; else if (offset >= 0x800) return; /* update the current parameters */ uint16_t word = curalpha.basemem_read(offset + 3); if (!(word & 1)) { if (((word >> 1) & 7) != m_playfield_palette_bank[i]) { if (scanline > 0) screen.update_partial(scanline - 1); m_playfield_palette_bank[i] = (word >> 1) & 7; curplayfield.set_palette_offset(m_playfield_palette_bank[i] << 8); } } word = curalpha.basemem_read(offset + 4); if (!(word & 1)) { int newscroll = 2 * (((word >> 7) + 4) & 0x1ff); if (newscroll != m_playfield_xscroll[i]) { if (scanline > 0) screen.update_partial(scanline - 1); curplayfield.set_scrollx(0, newscroll); m_playfield_xscroll[i] = newscroll; } } word = curalpha.basemem_read(offset + 5); if (!(word & 1)) { /* a new vscroll latches the offset into a counter; we must adjust for this */ int newscroll = ((word >> 7) - (scanline)) & 0x1ff; if (newscroll != m_playfield_yscroll[i]) { if (scanline > 0) screen.update_partial(scanline - 1); curplayfield.set_scrolly(0, newscroll); m_playfield_yscroll[i] = newscroll; } } word = curalpha.basemem_read(offset + 7); if (!(word & 1)) { if (m_current_slip[i] != word) { if (scanline > 0) screen.update_partial(scanline - 1); m_current_slip[i] = word; } } i++; } void cyberbal_state::scanline_update(screen_device &screen, int scanline) { scanline_update_one(*m_lscreen, scanline, 0, *m_playfield, *m_alpha); scanline_update_one(*m_rscreen, scanline, 1, *m_playfield2, *m_alpha2); } void cyberbal2p_state::scanline_update(screen_device &screen, int scanline) { scanline_update_one(*m_screen, scanline, 0, *m_playfield, *m_alpha); } /************************************* * * Main refresh * *************************************/ uint32_t cyberbal_base_state::update_one_screen(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, atari_motion_objects_device &curmob, tilemap_t &curplayfield, tilemap_t &curalpha) { // start drawing curmob.draw_async(cliprect); /* draw the playfield */ curplayfield.draw(screen, bitmap, cliprect, 0, 0); /* draw and merge the MO */ bitmap_ind16 &mobitmap = curmob.bitmap(); for (const sparse_dirty_rect *rect = curmob.first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) for (int y = rect->top(); y <= rect->bottom(); y++) { uint16_t *mo = &mobitmap.pix16(y); uint16_t *pf = &bitmap.pix16(y); for (int x = rect->left(); x <= rect->right(); x++) if (mo[x] != 0xffff) { /* not verified: logic is all controlled in a PAL */ pf[x] = mo[x]; } } /* add the alpha on top */ curalpha.draw(screen, bitmap, cliprect, 0, 0); return 0; } uint32_t cyberbal_state::screen_update_cyberbal_left(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return update_one_screen(screen, bitmap, cliprect, *m_mob, *m_playfield, *m_alpha); } uint32_t cyberbal_state::screen_update_cyberbal_right(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return update_one_screen(screen, bitmap, cliprect, *m_mob2, *m_playfield2, *m_alpha2); } uint32_t cyberbal2p_state::screen_update_cyberbal2p(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { return update_one_screen(screen, bitmap, cliprect, *m_mob, *m_playfield, *m_alpha); }