97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
#pragma once
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// STL includes
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#include <cstdint>
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///
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/// Color transformation to adjust the saturation and value of a RGB color value
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///
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class RgbTransform
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{
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public:
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///
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/// Default constructor
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///
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RgbTransform();
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///
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/// Constructor
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///
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/// @param gammaR The used red gamma
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/// @param gammaG The used green gamma
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/// @param gammab The used blue gamma
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/// @param brightnessLow The used lower brightness
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/// @param brightnessHigh The used higher brightness
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///
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RgbTransform(double gammaR, double gammaG, double gammaB, double brightnessLow, double brightnessHigh);
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///
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/// Destructor
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///
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~RgbTransform();
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/// @return The current red gamma value
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double getGammaR() const;
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/// @return The current green gamma value
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double getGammaG() const;
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/// @return The current blue gamma value
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double getGammaB() const;
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/// @param gamma New gamma value
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void setGamma(double gammaR,double gammaG=-1, double gammaB=-1);
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/// @return The current lower brightness
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double getBrightnessMin() const;
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/// @param gamma New lower brightness
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void setBrightnessMin(double brightness);
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/// @return The current lower brightness
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double getBrightness() const;
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/// @param gamma New lower brightness
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void setBrightness(double brightness);
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///
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/// Apply the transform the the given RGB values.
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///
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/// @param red The red color component
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/// @param green The green color component
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/// @param blue The blue color component
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///
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/// @note The values are updated in place.
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///
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void transform(uint8_t & red, uint8_t & green, uint8_t & blue);
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private:
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///
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/// init
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///
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/// @param gammaR The used red gamma
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/// @param gammaG The used green gamma
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/// @param gammab The used blue gamma
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/// @param brightnessLow The used lower brightness
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/// @param brightnessHigh The used higher brightness
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///
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void init(double gammaR, double gammaG, double gammaB, double brightnessLow, double brightnessHigh);
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/// (re)-initilize the color mapping
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void initializeMapping(); /// The saturation gain
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double _brightnessLow;
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double _brightnessHigh;
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double _sumBrightnessLow;
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double _sumBrightnessHigh;
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double _gammaR;
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double _gammaG;
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double _gammaB;
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/// The mapping from input color to output color
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uint8_t _mappingR[256];
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uint8_t _mappingG[256];
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uint8_t _mappingB[256];
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};
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