1 files changed, 93 insertions, 0 deletions
diff --git a/source/gameengine/GamePlayer/common/windows/GPW_System.cpp b/source/gameengine/GamePlayer/common/windows/GPW_System.cpp
new file mode 100644
index 00000000000..ba71e036fc4
--- /dev/null
+++ b/source/gameengine/GamePlayer/common/windows/GPW_System.cpp
@@ -0,0 +1,93 @@
+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ * Timing routine taken and modified from KX_BlenderSystem.cpp
+ */
+
+#include <windows.h>
+
+#include "GPW_System.h"
+
+
+GPW_System::GPW_System(void)
+{
+	m_freq = 0;
+	m_lastCount = 0;
+	m_lastRest = 0;
+	m_lastTime = 0;
+}
+
+
+double GPW_System::GetTimeInSeconds()
+{
+#if 0
+	double secs = ::GetTickCount();
+	secs /= 1000.;
+	return secs;
+#else
+
+	// 03/20/1999 Thomas Hieber: completely redone to get true Millisecond 
+	// accuracy instead of very rough ticks. This routine will also provide
+	// correct wrap around at the end of "long"
+
+	// m_freq was set to -1, if the current Hardware does not support 
+	// high resolution timers. We will use GetTickCount instead then.
+	if (m_freq < 0) {
+		return ::GetTickCount();
+	}
+
+	// m_freq is 0, the first time this function is being called.
+	if (m_freq == 0) {
+		// Try to determine the frequency of the high resulution timer
+		if (!::QueryPerformanceFrequency((LARGE_INTEGER*)&m_freq)) {
+			// There is no such timer....
+			m_freq = -1;
+			return 0;
+		}
+	}
+
+	// Retrieve current count
+	__int64 count = 0;
+	::QueryPerformanceCounter((LARGE_INTEGER*)&count);
+
+	// Calculate the time passed since last call, and add the rest of
+	// those tics that didn't make it into the last reported time.
+	__int64 delta = 1000*(count-m_lastCount) + m_lastRest;
+
+	m_lastTime += (long)(delta/m_freq);	// Save the new value
+	m_lastRest  = delta%m_freq;			// Save those ticks not being counted
+	m_lastCount = count;				// Save last count
+
+	// Return a high quality measurement of time
+	return m_lastTime/1000.0; 
+#endif
+}
+
+