////////////////////////////////////////////////////////////////////////////////
//
//	File: SavePalette.h
//
//	Date: December 1999
//
//	Author: Daniel Switkin
//
//	Copyright 2003 (c) by Daniel Switkin. This file is made publically available
//	under the BSD license, with the stipulations that this complete header must
//	remain at the top of the file indefinitely, and credit must be given to the
//	original author in any about box using this software.
//
////////////////////////////////////////////////////////////////////////////////

#ifndef SAVE_PALETTE_H
#define SAVE_PALETTE_H

#include "SFHash.h"
#include <GraphicsDefs.h>
class BBitmap;

enum {
	WEB_SAFE_PALETTE = 0,
	BEOS_SYSTEM_PALETTE,
	GREYSCALE_PALETTE,
	OPTIMAL_PALETTE
};

enum {
	NO_TRANSPARENCY = 0,
	AUTO_TRANSPARENCY,
	COLOR_KEY_TRANSPARENCY
};

class SavePalette {
	public:
							SavePalette(int mode);
							SavePalette(BBitmap *bitmap,
										int32 maxSizeInBits = 8);
	virtual					~SavePalette();
		
	inline	bool			IsValid() const
								{ return !fFatalError; }

			uint8			IndexForColor(uint8 red, uint8 green,
										  uint8 blue, uint8 alpha = 255);
	inline	uint8			IndexForColor(const rgb_color& color);

	inline	bool			UseTransparent() const
								{ return fTransparentMode > NO_TRANSPARENCY; }

			void			PrepareForAutoTransparency();
	inline	int				TransparentIndex() const
								{ return fTransparentIndex; }
			void			SetTransparentColor(uint8 red,
												uint8 green,
												uint8 blue);

	inline	int				SizeInBits() const
								{ return fSizeInBits; }

	inline	int				BackgroundIndex() const
								{ return fBackgroundIndex; }

			void			GetColors(uint8* buffer, int size) const;

			rgb_color*		pal;

	private:
			int				fSize;
			int				fSizeInBits;
			int				fMode;
			uint32			fTransparentMode;
			int				fTransparentIndex;
			int				fBackgroundIndex;
			bool			fFatalError;
};

// IndexForColor
inline uint8
SavePalette::IndexForColor(const rgb_color& color)
{
	return IndexForColor(color.red, color.green, color.blue, color.alpha);
}


#endif