// license:BSD-3-Clause // copyright-holders:Mike Balfour /*************************************************************************** Atari Canyon Bomber video emulation ***************************************************************************/ #include "emu.h" #include "includes/canyon.h" WRITE8_MEMBER(canyon_state::canyon_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } TILE_GET_INFO_MEMBER(canyon_state::get_bg_tile_info) { uint8_t code = m_videoram[tile_index]; SET_TILE_INFO_MEMBER(0, code & 0x3f, code >> 7, 0); } void canyon_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(canyon_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); } void canyon_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int i; for (i = 0; i < 2; i++) { int x = m_videoram[0x3d0 + 2 * i + 0x1]; int y = m_videoram[0x3d0 + 2 * i + 0x8]; int c = m_videoram[0x3d0 + 2 * i + 0x9]; m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, c >> 3, i, !(c & 0x80), 0, 224 - x, 240 - y, 0); } } void canyon_state::draw_bombs( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int i; for (i = 0; i < 2; i++) { int sx = 254 - m_videoram[0x3d0 + 2 * i + 0x5]; int sy = 246 - m_videoram[0x3d0 + 2 * i + 0xc]; rectangle rect(sx, sx + 1, sy, sy + 1); rect &= cliprect; bitmap.fill(1 + 2 * i, rect); } } uint32_t canyon_state::screen_update_canyon(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); draw_sprites(bitmap, cliprect); draw_bombs(bitmap, cliprect); /* watchdog is disabled during service mode */ m_watchdog->watchdog_enable(!(ioport("IN2")->read() & 0x10)); return 0; }