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engines/mutationofjb/animationdecoder.h

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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/>.
+ *
+ */
+
+#ifndef MUTATIONOFJB_ANIMATIONDECODER_H
+#define MUTATIONOFJB_ANIMATIONDECODER_H
+
+#include "common/rect.h"
+#include "common/path.h"
+#include "common/scummsys.h"
+
+#include "graphics/surface.h"
+#include "mutationofjb/encryptedfile.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace MutationOfJB {
+
+enum {
+	PALETTE_COLORS = 256,
+	PALETTE_SIZE = PALETTE_COLORS * 3,
+	IMAGE_WIDTH = 320,
+	IMAGE_HEIGHT = 200
+};
+
+class AnimationDecoderCallback {
+public:
+	virtual void onFrame(int frameNo, Graphics::Surface &surface) = 0;
+	virtual void onPaletteUpdated(byte palette[PALETTE_SIZE]) = 0;
+	virtual ~AnimationDecoderCallback() {}
+};
+
+class AnimationDecoder {
+public:
+	AnimationDecoder(const Common::Path &fileName);
+	AnimationDecoder(const Common::Path &fileName, const Graphics::Surface &outSurface);
+	~AnimationDecoder();
+	bool decode(AnimationDecoderCallback *callback);
+
+	/**
+	 * Enables partial decoding mode.
+	 *
+	 * @param fromFrame Frame to start decoding on (inclusive).
+	 * @param toFrame Frame to end decoding on (inclusive).
+	 * @param area Output surface will be confined to this area.
+	 * @param threshold Source pixels with color index above this threshold will not be replaced.
+	 */
+	void setPartialMode(int fromFrame, int toFrame, const Common::Rect &area = Common::Rect(), uint8 threshold = 0xFF);
+
+private:
+	void loadPalette(Common::SeekableReadStream &stream);
+	void loadFullFrame(EncryptedFile &file, uint32 size);
+	void loadDiffFrame(EncryptedFile &file, uint32 size);
+
+	Common::Path _fileName;
+	Graphics::Surface _surface;
+	bool _owningSurface;
+	byte _palette[PALETTE_SIZE];
+	int _fromFrame;
+	int _toFrame;
+	Common::Rect _area;
+	uint8 _threshold;
+};
+
+}
+
+#endif