// license:BSD-3-Clause // copyright-holders:Mike Balfour /*************************************************************************** Atari Night Driver hardware ***************************************************************************/ #include "emu.h" #include "includes/nitedrvr.h" WRITE8_MEMBER(nitedrvr_state::nitedrvr_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } TILE_GET_INFO_MEMBER(nitedrvr_state::get_bg_tile_info) { int code = m_videoram[tile_index] & 0x3f; SET_TILE_INFO_MEMBER(0, code, 0, 0); } void nitedrvr_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(nitedrvr_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 4); } void nitedrvr_state::draw_box(bitmap_ind16 &bitmap, const rectangle &cliprect, int bx, int by, int ex, int ey) { for (int y = by; y < ey; y++) { for (int x = bx; x < ex; x++) if (cliprect.contains(x, y)) bitmap.pix16(y, x) = 1; } } void nitedrvr_state::draw_roadway(bitmap_ind16 &bitmap, const rectangle &cliprect) { for (int roadway = 0; roadway < 16; roadway++) { int bx = m_hvc[roadway]; int by = m_hvc[roadway + 16]; int ex = bx + ((m_hvc[roadway + 32] & 0xf0) >> 4); int ey = by + (16 - (m_hvc[roadway + 32] & 0x0f)); draw_box(bitmap, cliprect, bx, by, ex, ey); } } uint32_t nitedrvr_state::screen_update_nitedrvr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { bitmap.fill(0, cliprect); // don't wrap playfield rectangle clip = cliprect; if (clip.max_y > 31) clip.max_y = 31; m_bg_tilemap->draw(screen, bitmap, clip, 0, 0); draw_roadway(bitmap, cliprect); return 0; }