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engines/tot/chrono.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/system.h"
+
+#include "tot/chrono.h"
+#include "tot/tot.h"
+
+namespace Tot {
+
+ChronoManager::ChronoManager(/* args */) : _lastTick(0) {
+}
+
+ChronoManager::~ChronoManager() {
+}
+
+void ChronoManager::updateChrono() {
+	uint32 currentTime = g_system->getMillis();
+
+	if ((currentTime - _lastTick) >= static_cast<uint32>(kTickMs / _speedMultiplier)) {
+		_gameTick = true;
+		_tickCount++;
+		if (_tickCount == kHalfTickMultiplier) {
+			_tickCount = 0;
+			_gameTickHalfSpeed = true;
+		} else {
+			_gameTickHalfSpeed = false;
+		}
+		_lastTick = currentTime;
+	} else {
+		_gameTick = false;
+	}
+}
+
+void ChronoManager::changeSpeed() {
+	if (_speedMultiplier == 1)
+		_speedMultiplier = 4;
+	else
+		_speedMultiplier = 1;
+}
+
+void ChronoManager::delay(uint32 ms) {
+	uint32 delayStart = g_system->getMillis();
+
+	ms = ms / _speedMultiplier;
+	while ((g_system->getMillis() - delayStart) < ms && !g_engine->shouldQuit()) {
+		g_engine->_events->pollEvent();
+		g_engine->_screen->update();
+	}
+}
+
+} // End of namespace Tot