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image/codecs/qtrle.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 IMAGE_CODECS_QTRLE_H
+#define IMAGE_CODECS_QTRLE_H
+
+#include "graphics/pixelformat.h"
+#include "graphics/palette.h"
+#include "image/codecs/codec.h"
+
+namespace Image {
+
+/**
+ * QuickTime Run-Length Encoding decoder.
+ *
+ * Used by PICT/QuickTime.
+ */
+class QTRLEDecoder : public Codec {
+public:
+	QTRLEDecoder(uint16 width, uint16 height, byte bitsPerPixel);
+	~QTRLEDecoder() override;
+
+	const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;
+	Graphics::PixelFormat getPixelFormat() const override;
+
+	bool containsPalette() const override { return _ditherPalette != 0; }
+	const byte *getPalette() override { _dirtyPalette = false; return _ditherPalette.data(); }
+	bool hasDirtyPalette() const override { return _dirtyPalette; }
+	bool canDither(DitherType type) const override;
+	void setDither(DitherType type, const byte *palette) override;
+
+private:
+	byte _bitsPerPixel;
+	Graphics::Surface *_surface;
+	uint16 _width, _height;
+	uint32 _paddedWidth;
+	Graphics::Palette _ditherPalette;
+	bool _dirtyPalette;
+	byte *_colorMap;
+
+	void createSurface();
+
+	void decode1(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void decode2_4(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange, byte bpp);
+	void decode8(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void decode16(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void dither16(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void decode24(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void dither24(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void decode32(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+	void dither32(Common::SeekableReadStream &stream, uint32 rowPtr, uint32 linesToChange);
+};
+
+} // End of namespace Image
+
+#endif