seperated NULL driver into its own source module (*not* tested yet)

svn-id: r4812

1 files changed, 91 insertions, 0 deletions

diff --git a/backends/null/null.cpp b/backends/null/null.cpp
new file mode 100644
index 0000000000..d48f1be764
--- /dev/null
+++ b/backends/null/null.cpp
@@ -0,0 +1,91 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001/2002 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "stdafx.h"
+#include "scummsys.h"
+#include "system.h"
+
+
+/* NULL video driver */
+class OSystem_NULL : public OSystem {
+public:
+	void set_palette(const byte *colors, uint start, uint num) {}
+	void init_size(uint w, uint h);
+	void copy_rect(const byte *buf, int pitch, int x, int y, int w, int h) {}
+	void update_screen() {}
+	bool show_mouse(bool visible) { return false; }
+	void set_mouse_pos(int x, int y) {}
+	void set_mouse_cursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y) {}
+	void set_shake_pos(int shake_pos) {}
+	uint32 get_msecs();
+	void delay_msecs(uint msecs);
+	void *create_thread(ThreadProc *proc, void *param) { return NULL; }
+	bool poll_event(Event *event) { return false; }
+	bool set_sound_proc(void *param, SoundProc *proc, byte sound) {}
+	void quit() { exit(1); }
+	uint32 property(int param, Property *value) { return 0; }
+	static OSystem *create(int gfx_mode, bool full_screen);
+private:
+
+	uint msec_start;
+
+	uint32 get_ticks();
+};
+
+void OSystem_NULL::init_size(uint w, uint h, byte sound) {
+	msec_start = get_ticks();
+}
+
+uint32 OSystem_NULL::get_ticks() {
+	uint a = 0;
+#ifdef WIN32
+	a = GetTickCount();
+#endif
+#ifdef UNIX
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	a = tv.tv_sec * 1000 + tv.tv_usec/1000;
+#endif
+
+	return a;
+}
+
+void OSystem_NULL::delay_msecs(uint msecs) {
+#ifdef WIN32
+	Sleep(msecs);
+#endif
+#ifdef UNIX
+	usleep(msecs*1000);
+#endif
+}
+
+uint32 OSystem_NULL::get_msecs() {
+	return get_ticks() - msec_start;
+}
+
+OSystem *OSystem_NULL_create() {
+	return new OSystem_NULL();
+}
+#else /* USE_NULL_DRIVER */
+
+OSystem *OSystem_NULL_create() {
+	return NULL;
+}