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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+/*
+ * This code is based on Broken Sword 2.5 engine
+ *
+ * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
+ *
+ * Licensed under GNU GPL v2
+ *
+ */
+
+#ifndef SWORD25_FRAMECOUNTER_H
+#define SWORD25_FRAMECOUNTER_H
+
+// Includes
+#include "sword25/kernel/common.h"
+#include "sword25/kernel/bs_stdint.h"
+
+namespace Sword25 {
+
+/**
+ * A simple class that implements a frame counter
+ */
+class Framecounter {
+private:
+ enum {
+ DEFAULT_UPDATE_FREQUENCY = 10
+ };
+
+public:
+ /**
+ * Creates a new BS_Framecounter object
+ * @param UpdateFrequency Specifies how often the frame counter should be updated in a sceond.
+ * The default value is 10.
+ */
+ Framecounter(int UpdateFrequency = DEFAULT_UPDATE_FREQUENCY);
+
+ /**
+ * Determines how often the frame counter should be updated in a second.
+ * @param UpdateFrequency Specifies how often the frame counter should be updated in a second.
+ */
+ inline void SetUpdateFrequency(int UpdateFrequency);
+
+ /**
+ * This method must be called once per frame.
+ */
+ void Update();
+
+ /**
+ * Returns the current FPS value.
+ */
+ int GetFPS() const {
+ return m_FPS;
+ }
+
+private:
+ int m_FPS;
+ int m_FPSCount;
+ int64_t m_LastUpdateTime;
+ uint64_t m_UpdateDelay;
+};
+
+// Inlines
+void Framecounter::SetUpdateFrequency(int UpdateFrequency) {
+ // Frequency in time (converted to microseconds)
+ m_UpdateDelay = 1000000 / UpdateFrequency;
+}
+
+} // End of namespace Sword25
+
+#endif