Added files via upload

Former-commit-id: 55b74524b06af6f5c443053a56216c0db465fb2f

libsrc/utils/HslTransform.cpp

@@ -0,0 +1,158 @@
+#include <algorithm>
+#include <cmath>
+#include <utils/HslTransform.h>
+
+HslTransform::HslTransform() :
+	_saturationGain(1.0),
+	_luminanceGain(1.0)
+{
+}
+
+HslTransform::HslTransform(double saturationGain, double luminanceGain) :
+	_saturationGain(saturationGain),
+	_luminanceGain(luminanceGain)
+{
+}
+
+HslTransform::~HslTransform()
+{
+}
+
+void HslTransform::setSaturationGain(double saturationGain)
+{
+	_saturationGain = saturationGain;
+}
+
+double HslTransform::getSaturationGain() const
+{
+	return _saturationGain;
+}
+
+void HslTransform::setLuminanceGain(double luminanceGain)
+{
+	_luminanceGain = luminanceGain;
+}
+
+double HslTransform::getLuminanceGain() const
+{
+	return _luminanceGain;
+}
+
+void HslTransform::transform(uint8_t & red, uint8_t & green, uint8_t & blue) const
+{
+	if (_saturationGain != 1.0 || _luminanceGain != 1.0)
+	{
+		uint16_t hue;
+		float saturation, luminance;
+		rgb2hsl(red, green, blue, hue, saturation, luminance);
+		
+		float s = saturation * _saturationGain;
+		if (s > 1.0f)
+			saturation = 1.0f;
+		else
+			saturation = s;
+
+		float l = luminance * _luminanceGain;
+		if (l > 1.0f)
+			luminance = 1.0f;
+		else
+			luminance = l;
+				
+		hsl2rgb(hue, saturation, luminance, red, green, blue);
+	}
+}
+
+void HslTransform::rgb2hsl(uint8_t red, uint8_t green, uint8_t blue, uint16_t & hue, float & saturation, float & luminance)
+{
+	float r = red / 255.0f;
+	float g = green / 255.0f;
+	float b = blue / 255.0f;	
+	
+	float rgbMin = r < g ? (r < b ? r : b) : (g < b ? g : b);
+	float rgbMax = r > g ? (r > b ? r : b) : (g > b ? g : b);
+	float diff = rgbMax - rgbMin;
+		
+	//luminance
+	luminance = (rgbMin + rgbMax) / 2.0f;
+	
+	if (diff ==  0.0f) {
+		saturation = 0.0f;
+		hue        = 0;		
+		return;
+	}	
+	
+	//saturation
+	if (luminance < 0.5f)
+		saturation = diff / (rgbMin + rgbMax);
+	else 
+		saturation = diff / (2.0f - rgbMin - rgbMax);
+	
+	if (rgbMax == r)
+	{
+		// start from 360 to be sure that we won't assign a negative number to the unsigned hue value
+		hue = 360 + 60 * (g - b) / (rgbMax - rgbMin);
+
+		if (hue > 359)
+			hue -= 360;
+	}
+	else if (rgbMax == g)
+	{
+		hue = 120 + 60 * (b - r) / (rgbMax - rgbMin);
+	}
+	else
+	{
+		hue = 240 + 60 * (r - g) / (rgbMax - rgbMin);
+	}
+		
+}
+
+void HslTransform::hsl2rgb(uint16_t hue, float saturation, float luminance, uint8_t & red, uint8_t & green, uint8_t & blue)
+{
+	if (saturation == 0.0f){
+		red = (uint8_t)(luminance * 255.0f);
+		green = (uint8_t)(luminance * 255.0f);
+		blue = (uint8_t)(luminance * 255.0f);
+		return;
+	}
+	
+	float q;
+	
+	if (luminance < 0.5f)
+		q = luminance * (1.0f + saturation);
+	else
+		q = (luminance + saturation) - (luminance * saturation);
+	
+	float p = (2.0f * luminance) - q;	
+	float h = hue / 360.0f;
+	
+	float t[3];
+	
+	t[0] = h + (1.0f / 3.0f);
+	t[1] = h;
+	t[2] = h - (1.0f / 3.0f);
+	
+	for (int i = 0; i < 3; i++) {
+		if (t[i] < 0.0f)
+			t[i] += 1.0f;
+		if (t[i] > 1.0f)
+			t[i] -= 1.0f;
+	}
+	
+	float out[3];
+	
+	for (int i = 0; i < 3; i++) {
+		if (t[i] * 6.0f < 1.0f)
+			out[i] = p + (q - p) * 6.0f * t[i];
+		else if (t[i] * 2.0f < 1.0f)
+			out[i] = q;
+		else if (t[i] * 3.0f < 2.0f)
+			out[i] = p + (q - p) * ((2.0f / 3.0f) - t[i]) * 6.0f;
+		else out[i] = p;
+	}
+	
+	//convert back to 0...255 range
+	red = (uint8_t)(out[0] * 255.0f);
+	green = (uint8_t)(out[1] * 255.0f);
+	blue = (uint8_t)(out[2] * 255.0f);
+
+}

libsrc/utils/RgbChannelCorrection.cpp

@@ -0,0 +1,120 @@
+// STL includes
+#include <cmath>
+
+// Utils includes
+#include <utils/RgbChannelCorrection.h>
+
+RgbChannelCorrection::RgbChannelCorrection() :
+	_correctionR(255),
+	_correctionB(255),
+	_correctionG(255)
+{
+	initializeMapping();
+}
+
+RgbChannelCorrection::RgbChannelCorrection(int correctionR, int correctionG, int correctionB) :
+	_correctionR(correctionR),
+	_correctionG(correctionG),
+	_correctionB(correctionB)
+{
+	initializeMapping();
+}
+
+RgbChannelCorrection::~RgbChannelCorrection()
+{
+}
+
+uint8_t RgbChannelCorrection::getcorrectionR() const
+{
+	return _correctionR;
+}
+
+void RgbChannelCorrection::setcorrectionR(uint8_t correctionR)
+{
+	_correctionR = correctionR;
+	initializeMapping();
+}
+
+uint8_t RgbChannelCorrection::getcorrectionG() const
+{
+	return _correctionG;
+}
+
+void RgbChannelCorrection::setcorrectionG(uint8_t correctionG)
+{
+	_correctionG = correctionG;
+	initializeMapping();
+}
+
+uint8_t RgbChannelCorrection::getcorrectionB() const
+{
+	return _correctionB;
+}
+
+void RgbChannelCorrection::setcorrectionB(uint8_t correctionB)
+{
+	_correctionB = correctionB;
+	initializeMapping();
+}
+
+uint8_t RgbChannelCorrection::correctionR(uint8_t inputR) const
+{
+	return _mappingR[inputR];
+}
+
+uint8_t RgbChannelCorrection::correctionG(uint8_t inputG) const
+{
+	return _mappingG[inputG];
+}
+
+uint8_t RgbChannelCorrection::correctionB(uint8_t inputB) const
+{
+	return _mappingB[inputB];
+}
+
+void RgbChannelCorrection::initializeMapping()
+{
+	// initialize the mapping
+	for (int i = 0; i < 256; ++i)
+	{
+		int outputR = (i * _correctionR) / 255;
+		if (outputR < -255)
+			{
+				outputR = -255;
+			}
+		else if (outputR > 255)
+			{
+				outputR = 255;
+			}
+		_mappingR[i] = outputR;
+	}
+	for (int i = 0; i < 256; ++i)
+	{
+		int outputG = (i * _correctionG) / 255;
+		if (outputG < -255)
+			{
+				outputG = -255;
+			}
+		else if (outputG > 255)
+			{
+				outputG = 255;
+			}
+		_mappingG[i] = outputG;
+	}
+	for (int i = 0; i < 256; ++i)
+	{
+		int outputB = (i * _correctionB) / 255;
+		if (outputB < -255)
+			{
+				outputB = -255;
+			}
+		else if (outputB > 255)
+			{
+				outputB = 255;
+			}
+		_mappingB[i] = outputB;
+	}
+		
+
+}
+