Initial commit

engines/tetraedge/te/te_frame_anim.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/util.h"
+#include "math/utils.h"
+#include "tetraedge/te/te_frame_anim.h"
+
+namespace Tetraedge {
+
+TeFrameAnim::TeFrameAnim() : _nbFrames(0), _frameRate(25.0f), _reversed(false), _minFrame(0),
+_numFramesToShow(-1), _startTime(0), _endTime(FLT_MAX), _loopCount(0), _lastFrameShown(-1) {
+}
+
+void TeFrameAnim::update(double millis) {
+	int minFrame = MIN(_minFrame, _nbFrames);
+	int maxFrame = MIN(_minFrame + _numFramesToShow, _nbFrames);
+	double frameNo = _frameRate * millis / 1000.0;
+
+	int loopsDone;
+	int framesToPlay = maxFrame - minFrame;
+	if (framesToPlay <= 0 && _nbFrames > 0)
+		framesToPlay = _nbFrames;
+
+	int frameToShow;
+	if (framesToPlay == 0) {
+		frameToShow = 0;
+		loopsDone = -1;
+	} else if (framesToPlay > 0) {
+		loopsDone = (int)((int)frameNo / framesToPlay);
+		if (!_reversed) {
+			frameToShow = (int)frameNo % framesToPlay + minFrame;
+		} else {
+			frameToShow = (maxFrame - 1) - (int)frameNo % framesToPlay;
+		}
+	} else {
+		// else, we don't know the total frames.. just keep asking for higher.
+		loopsDone = -1;
+		frameToShow = (int)frameNo;
+	}
+
+	if (_loopCount == -1 || loopsDone < _loopCount) {
+		if (frameToShow == _lastFrameShown)
+			return;
+
+		_lastFrameShown = frameToShow;
+		if (_frameChangedSignal.call()) {
+			// got signal that we'd finished.
+			if (_nbFrames == 0)
+				_nbFrames = frameToShow;
+		}
+	} else {
+		stop();
+		_onFinishedSignal.call();
+	}
+}
+
+} // end namespace Tetraedge