// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Bad Lands hardware ***************************************************************************/ #include "emu.h" #include "video/atarimo.h" #include "includes/badlands.h" /************************************* * * Tilemap callbacks * *************************************/ TILE_GET_INFO_MEMBER(badlands_state::get_playfield_tile_info) { uint16_t data = m_playfield_tilemap->basemem_read(tile_index); int code = (data & 0x1fff) + ((data & 0x1000) ? (m_playfield_tile_bank << 12) : 0); int color = (data >> 13) & 0x07; SET_TILE_INFO_MEMBER(0, code, color, 0); } /************************************* * * Generic video system start * *************************************/ const atari_motion_objects_config badlands_state::s_mob_config = { 1, /* index to which gfx system */ 1, /* number of motion object banks */ 0, /* are the entries linked? */ 1, /* are the entries split? */ 0, /* render in reverse order? */ 0, /* render in swapped X/Y order? */ 0, /* does the neighbor bit affect the next object? */ 0, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x80, /* base palette entry */ 0x80, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0x003f }}, /* mask for the link */ {{ 0x0fff,0,0,0 }}, /* mask for the code index */ {{ 0,0,0,0x0007 }}, /* mask for the color */ {{ 0,0,0,0xff80 }}, /* 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 */ {{ 0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0,0,0,0x0008 }}, /* mask for the priority */ {{ 0 }}, /* mask for the neighbor */ {{ 0 }}, /* mask for absolute coordinates */ {{ 0 }}, /* mask for the special value */ 0, /* resulting value to indicate "special" */ }; VIDEO_START_MEMBER(badlands_state,badlands) { /* save states */ save_item(NAME(m_playfield_tile_bank)); } /************************************* * * Playfield bank write handler * *************************************/ WRITE16_MEMBER( badlands_state::badlands_pf_bank_w ) { if (ACCESSING_BITS_0_7) if (m_playfield_tile_bank != (data & 1)) { m_screen->update_partial(m_screen->vpos()); m_playfield_tile_bank = data & 1; m_playfield_tilemap->mark_all_dirty(); } } /************************************* * * Main refresh * *************************************/ uint32_t badlands_state::screen_update_badlands(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // start drawing m_mob->draw_async(cliprect); // draw the playfield m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 0); // draw and merge the MO bitmap_ind16 &mobitmap = m_mob->bitmap(); for (const sparse_dirty_rect *rect = m_mob->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 yet verified */ if ((mo[x] & atari_motion_objects_device::PRIORITY_MASK) || !(pf[x] & 8)) pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK; } } return 0; }