RU/RU_ColorFunctions.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *
 *      Ondrej Kos
 *      Side Effects
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        RU_ColorFunctions.h
 *
 * COMMENTS:
 *      Various pixel functions for manipulating colors.
 */
#ifndef RU_ColorFunctions_h
#define RU_ColorFunctions_h

#include "RU_API.h"
#include "RU_PixelFunction.h"
     
typedef float (*RU_InterpFunction)(float);

class RU_API RU_ColorReplace : public RU_PixelFunction
{
public:
    RU_ColorReplace( float hmin, float hmax, float hspill,
                     float smin, float smax, float sspill,
                     float lmin, float lmax, float lspill,
                     RU_InterpFunction interp,
                     float hshift, float sscale, float lscale)
    {
        myHueMin = hmin; myHueMax = hmax; myHueSpill = hspill;
        mySatMin = smin; mySatMax = smax; mySatSpill = sspill;
        myLumMin = lmin; myLumMax = lmax; myLumSpill = lspill;

        myInterp = interp;

        myHueShift = hshift; mySatScale = sscale; myLumScale = lscale;
    }

    inline float        hueKey(float hue) const;
    inline float        satKey(float sat) const;
    inline float        lumKey(float lum) const;
protected:
    static void         replacecolor(RU_PixelFunction *f, float **vals,
                                     const bool *scope);

    virtual bool                needAllComponents() const { return true; }
    virtual RUVectorFunc        getVectorFunction() const
                                { return replacecolor; }

private:
    // Source region parameters
    float                       myHueMin;
    float                       myHueMax;
    float                       myHueSpill;
    float                       mySatMin;
    float                       mySatMax;
    float                       mySatSpill;
    float                       myLumMin;
    float                       myLumMax;
    float                       myLumSpill;
    RU_InterpFunction           myInterp;

    // Color transform parameters
    float                       myHueShift;
    float                       mySatScale;
    float                       myLumScale;
};

#endif

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