///////////////////////////// ColorScale.h ////////////////////////////////////
#ifndef _COLOR_SCALE
#define _COLOR_SCALE

typedef unsigned long COLORREF;	// 0 to 0xFFFFFF and 0xFFFFFFFF for transparencies

// Create a 0xRRGGBB from separate 8 bits colors - no error checking
#define MakeRGB(r,g,b) ((r)<<16 | (g)<<8 | (b))

extern COLORREF ColorScaleRGB(const COLORREF Col1, const COLORREF Col2, const float Ratio);
extern COLORREF ColorScaleHSL(const COLORREF Col1, const COLORREF Col2, const float Ratio);

extern COLORREF ColorStepsRGB(const COLORREF Col1, const COLORREF Col2, const float Ratio, const int NbSteps);
extern COLORREF ColorStepsHSL(const COLORREF Col1, const COLORREF Col2, const float Ratio, const int NbSteps);

extern COLORREF ColorScaleRGB3(const COLORREF Col1, const COLORREF Col2, const COLORREF Col3, 
					float Ratio1, float Ratio2, float Ratio3);
extern COLORREF ColorScaleHSL3(const COLORREF Col1, const COLORREF Col2, const COLORREF Col3, 
					float Ratio1, float Ratio2, float Ratio3);

extern void 	RGBtoHLS(const COLORREF rgb, double *H, double *L, double *S );
extern COLORREF	HLStoRGB(const double H, const double L, const double S );


static double _HTemp, _LTemp, _STemp;
#define DARKER(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, Max(0,_LTemp-.1), _STemp))
#define DARKEST(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, Max(0,_LTemp-.2), _STemp))
#define LIGHTER(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, Min(1,_LTemp+.1), _STemp))
#define LIGHTEST(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, Min(1,_LTemp+.2), _STemp))


#define MORE_SATURATED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, _LTemp, Max(0,_STemp+.1)))
#define MOST_SATURATED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, _LTemp, Max(0,_STemp+.2)))
#define LESS_SATURATED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, _LTemp, Max(0,_STemp-.1)))
#define LEAST_SATURATED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(_HTemp, _LTemp, Max(0,_STemp-.2)))


#define MORE_HUED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(Max(0,_HTemp+.1), _LTemp, _STemp))
#define MOST_HUED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(Max(0,_HTemp+.2), _LTemp, _STemp))
#define LESS_HUED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(Max(0,_HTemp-.1), _LTemp, _STemp))
#define LEAST_HUED(c)	(RGBtoHLS((c), &_HTemp, &_LTemp, &_STemp),\
					 HLStoRGB(Max(0,_HTemp-.2), _LTemp, _STemp))

#endif