IMAGE: Add support for Cinepak VFW dithering

1 files changed, 18 insertions, 0 deletions

diff --git a/image/codecs/cinepak.h b/image/codecs/cinepak.h
index e9cd437730..ce8451bf9a 100644
--- a/image/codecs/cinepak.h
+++ b/image/codecs/cinepak.h
@@ -72,14 +72,32 @@ public:
 	const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream);
 	Graphics::PixelFormat getPixelFormat() const { return _pixelFormat; }
 
+	bool containsPalette() const { return _ditherPalette != 0; }
+	const byte *getPalette() { _dirtyPalette = false; return _ditherPalette; }
+	bool hasDirtyPalette() const { return _dirtyPalette; }
+	bool canDither() const;
+	void setDither(const byte *palette);
+
 private:
 	CinepakFrame _curFrame;
 	int32 _y;
+	int _bitsPerPixel;
 	Graphics::PixelFormat _pixelFormat;
 	byte *_clipTable, *_clipTableBuf;
 
+	byte *_ditherPalette;
+	bool _dirtyPalette;
+	byte *_rgbLookup;
+	byte *_colorMap;
+
 	void loadCodebook(Common::SeekableReadStream &stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize);
 	void decodeVectors(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
+
+	byte findNearestRGB(int index) const;
+	void ditherVectors(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
+	void ditherCodebookDetail(const CinepakCodebook &codebook, byte *dst) const;
+	void ditherCodebookSmooth(const CinepakCodebook &codebook, byte *dst) const;
+	byte getRGBLookupEntry(uint16 index) const;
 };
 
 } // End of namespace Image