// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** Atari Klax hardware ****************************************************************************/ #include "emu.h" #include "video/atarimo.h" #include "includes/klax.h" /************************************* * * Tilemap callbacks * *************************************/ TILE_GET_INFO_MEMBER(klax_state::get_playfield_tile_info) { const u16 data1 = m_playfield_tilemap->basemem_read(tile_index); const u16 data2 = m_playfield_tilemap->extmem_read(tile_index) >> 8; const u32 code = data1 & 0x1fff; const u32 color = data2 & 0x0f; SET_TILE_INFO_MEMBER(0, code, color, (data1 >> 15) & 1); } /************************************* * * Video system start * *************************************/ const atari_motion_objects_config klax_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? */ 0, /* does the neighbor bit affect the next object? */ 8, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x000, /* base palette entry */ 0x100, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0x00ff,0,0,0 }}, /* mask for the link */ {{ 0,0x0fff,0,0 }}, /* mask for the code index */ {{ 0,0,0x000f,0 }}, /* mask for the color */ {{ 0,0,0xff80,0 }}, /* mask for the X position */ {{ 0,0,0,0xff80 }}, /* mask for the Y position */ {{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/ {{ 0,0,0,0x0007 }}, /* mask for the height, in tiles */ {{ 0,0,0,0x0008 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0 }}, /* 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" */ }; /************************************* * * Latch write handler * *************************************/ void klax_state::klax_latch_w(u16 data) { } /************************************* * * Main refresh * *************************************/ u32 klax_state::screen_update(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++) { const u16 *mo = &mobitmap.pix16(y); u16 *pf = &bitmap.pix16(y); for (int x = rect->left(); x <= rect->right(); x++) if (mo[x] != 0xffff) { /* verified from schematics: PFPRI if (PFS7-4 == 0 || LBPIX3-0 == 0) */ if ((pf[x] & 0xf0) != 0xf0) pf[x] = mo[x]; } } return 0; }