Color class

Color.cpp

/*
 * Color.cpp
 *
 *  Created on: Jun 5, 2012
 *      Author: DEElekgolo
 */


#include "Color.hpp"

const Color Color::Black(0.f, 0.f, 0.f);
const Color Color::White(1.0f, 1.0f, 1.0f);
const Color Color::Red(1.0f, 0, 0);
const Color Color::Green(0, 1.0f, 0);
const Color Color::Blue(0, 0, 1.0f);
const Color Color::Yellow(1.0f, 1.0f, 0);
const Color Color::Magenta(1.0f, 0, 1.0f);
const Color Color::Cyan(0, 1.0f, 1.0f);

Color.hpp

/*
 * Color.hpp
 *
 *  Created on: Jun 5, 2012
 *      Author: DEElekgolo
 */

#ifndef COLOR_HPP_
#define COLOR_HPP_

#include <math.h>
#include <algorithm>



class Color
{
public:
	Color()
	{
		r = g = b = 0;
		a = 1.0f;
	}
	Color( float fr, float fg, float fb, float fa = 1.0f)
	{
		r = fr;
		g = fg;
		b = fb;
		a = fa;
	}
	Color( unsigned char cr, unsigned char cg, unsigned char cb, unsigned char ca = 0xFF)
	{
		r = (int)cr/(float)255;
		g = (int)cg/(float)255;
		b = (int)cb/(float)255;
		a = (int)ca/(float)255;
	}
	Color( unsigned int ir, unsigned int ig, unsigned int ib, unsigned int ia = 0xFF)
	{
		r = (int)ir/(float)255;
		g = (int)ig/(float)255;
		b = (int)ib/(float)255;
		a = (int)ia/(float)255;
	}
	~Color()
	{
	}

	unsigned int ToRGBA() const
	{
		return ((int)(r*255) << 24) |
			((int)(g*255) << 16) |
			((int)(b*255) << 8) |
			(int)(a*255);
	}
#define RGB15(r,g,b)  ((r)|((g)<<5)|((b)<<10))
	unsigned int ToRGB15() const
	{
		return (unsigned int) (RGB15(
				(unsigned char)(r*255)>>3,
				(unsigned char)(g*255)>>3,
				(unsigned char)(b*255)>>3
				));
	}

	float* ToFloatPointer()
	{
		return (float*)this;
	}

	void GammaCorrect(float fGamma)
	{
		r = pow(r,fGamma);
		g = pow(r,fGamma);
		b = pow(r,fGamma);
	}

	void Interpolate(Color cColor, float fAmount)
	{
		r = r + fAmount * (cColor.r - r);
		b = b + fAmount * (cColor.b - b);
		g = g + fAmount * (cColor.g - g);
		a = a + fAmount * (cColor.a - a);
	}
	void Multiply(Color cColor)
	{
		r = r * cColor.r;
		g = g * cColor.g;
		b = b * cColor.b;
	}

	void Darken (Color cColor)
	{
		r = std::min(r,cColor.r);
		g = std::min(g,cColor.g);
		b = std::min(b,cColor.b);
	}
	void ColorBurn(Color cColor)
	{
		r = 1.0f - (1.0f - r)/cColor.r;
		g = 1.0f - (1.0f - g)/cColor.g;
		b = 1.0f - (1.0f - b)/cColor.b;
	}
	void LinearBurn(Color cColor)
	{
		r = r + cColor.r - 1.0f;
		g = g + cColor.g - 1.0f;
		b = b + cColor.b - 1.0f;
	}
	void Lighten(Color cColor)
	{
		r = std::max(r,cColor.r);
		g = std::max(g,cColor.g);
		b = std::max(b,cColor.b);
	}
	void Screen(Color cColor)
	{
		r = 1.0f - (1.0f - r) * (1.0f - cColor.r);
		g = 1.0f - (1.0f - g) * (1.0f - cColor.g);
		b = 1.0f - (1.0f - b) * (1.0f - cColor.b);
	}
	void ColorDodge(Color cColor)
	{
		r = r/(1.0f-cColor.r);
		g = g/(1.0f-cColor.g);
		b = b/(1.0f-cColor.b);
	}
	void Overlay(Color cColor)
	{
		r>0.5f ? r = 1.0f - (1.0f-2.0f*(r-0.5f)) * (1.0f-cColor.r) :
			r = (2.0f * r) * cColor.r;
		g>0.5f ? r = 1.0f - (1.0f-2.0f*(g-0.5f)) * (1.0f-cColor.g) :
			g = (2.0f * g) * cColor.g;
		b>0.5f ? b = 1.0f - (1.0f-2.0f*(b-0.5f)) * (1.0f-cColor.b) :
			b = (2.0f * b) * cColor.b;
	}
	void SoftLight(Color cColor)
	{
		cColor.r > 0.5f ? r = 1.0f - (1.0f - r) * (1.0f - (cColor.r - 0.5f)) :
			r = r * (cColor.r + 0.5f);
		cColor.g > 0.5f ? g = 1.0f - (1.0f - g) * (1.0f - (cColor.g - 0.5f)) :
			g = g * (cColor.g + 0.5f);
		cColor.b > 0.5f ? b = 1.0f - (1.0f - b) * (1.0f - (cColor.b - 0.5f)) :
			b = b * (cColor.b + 0.5f);
	}
	void HardLight(Color cColor)
	{
		cColor.r > 0.5f ? r = 1.0f - (1.0f - r) * (1.0f - 2.0f * (cColor.r - 0.5f)) :
			r = r * (2.0f * cColor.r);
		cColor.g > 0.5f ? g = 1.0f - (1.0f - g) * (1.0f - 2.0f * (cColor.g - 0.5f)) :
			g = g * (2.0f * cColor.g);
		cColor.b > 0.5f ? b = 1.0f - (1.0f - b) * (1.0f - 2.0f * (cColor.b - 0.5f)) :
			b = b * (2.0f * cColor.b);
	}
	void VividLight(Color cColor)
	{
		cColor.r > 0.5f ? r = 1.0f - (1.0f - r)/(2.0f*(cColor.r - 0.5f)) :
			r = r / (1.0f - 2.0f * cColor.r);
		cColor.g > 0.5f ? g = 1.0f - (1.0f - g)/(2.0f*(cColor.g - 0.5f)) :
			g = g / (1.0f - 2.0f * cColor.g);
		cColor.b > 0.5f ? b = 1.0f - (1.0f - b)/(2.0f*(cColor.b - 0.5f)) :
			b = b / (1.0f - 2.0f * cColor.b);
	}
	void LinearLight(Color cColor)
	{
		cColor.r > 0.5f ? r = r + 2.0f*(cColor.r - 0.5f) :
			r = r + 2.0f*(cColor.r - 1.0f);
		cColor.g > 0.5f ? g = g + 2.0f*(cColor.g - 0.5f) :
			g = g + 2.0f*(cColor.g - 1.0f);
		cColor.b > 0.5f ? b = b + 2.0f*(cColor.b - 0.5f) :
			b = b + 2.0f*(cColor.b - 1.0f);
	}
	void PinLight(Color cColor)
	{
		cColor.r > 0.5f ? r = std::max(r,2.0f*(cColor.r-0.5f)) :
			r = r + 2.0f*(cColor.r - 1.0f);
		cColor.g > 0.5f ? g = std::max(r,2.0f*(cColor.g-0.5f)) :
			g = g + 2.0f*(cColor.g - 1.0f);
		cColor.b > 0.5f ? b = std::max(b,2.0f*(cColor.b-0.5f)) :
			b = b + 2.0f*(cColor.b - 1.0f);
	}
	void Difference(Color cColor)
	{
		r = abs(r - cColor.r);
		g = abs(g - cColor.g);
		b = abs(b - cColor.b);
	}
	void Exclusion(Color cColor)
	{
		r = 0.5f - 2.0f*(r-0.5f)*(cColor.r-0.5f);
		g = 0.5f - 2.0f*(g-0.5f)*(cColor.g-0.5f);
		b = 0.5f - 2.0f*(b-0.5f)*(cColor.b-0.5f);
	}


	bool operator ==( const Color& right)
	{
		return (r == right.r) &&
			(g == right.g) &&
			(b == right.b) &&
			(a == right.a);
	}


	bool operator !=( const Color& right)
	{
		return !(*this == right);
	}

	Color operator +( const Color& right)
	{
		return Color(static_cast<unsigned char>(std::min(r + right.r, 1.0f)),
			static_cast<unsigned char>(std::min(g + right.g, 1.0f)),
			static_cast<unsigned char>(std::min(b + right.b, 1.0f)),
			static_cast<unsigned char>(std::min(a + right.a, 1.0f)));
	}

	Color operator -( const Color& right)
	{
		return Color(static_cast<unsigned char>(std::min(r - right.r, 1.0f)),
			static_cast<unsigned char>(std::min(g - right.g, 1.0f)),
			static_cast<unsigned char>(std::min(b - right.b, 1.0f)),
			static_cast<unsigned char>(std::min(a - right.a, 1.0f)));
	}

	Color operator *( const Color& right)
	{
		return Color(static_cast<unsigned char>(r * right.r / 1.0f),
			static_cast<unsigned char>(g * right.g / 1.0f),
			static_cast<unsigned char>(b * right.b / 1.0f),
			static_cast<unsigned char>(a * right.a / 1.0f));
	}

	Color operator /( const Color& right)
	{
		return Color(static_cast<unsigned char>(std::min(r / right.r, 1.0f)),
			static_cast<unsigned char>(std::min(g / right.g, 1.0f)),
			static_cast<unsigned char>(std::min(b / right.b, 1.0f)),
			static_cast<unsigned char>(std::min(a / right.a, 1.0f)));
	}

	Color& operator +=( const Color& right)
	{
		 r += right.r;
		 g += right.g;
		 b += right.b;
		 a += right.a;
		 return *this;
	}

	Color& operator -=( const Color& right)
	{
		r -= right.r;
		g -= right.g;
		b -= right.b;
		a -= right.a;
		return *this;
	}

	Color& operator *=( const Color& right)
	{
		r *= right.r;
		g *= right.g;
		b *= right.b;
		a *= right.a;
		return *this;
	}

	Color& operator /=( const Color& right)
	{
		r /= right.r;
		g /= right.g;
		b /= right.b;
		a /= right.a;
		return *this;
	}



	float r,g,b,a;

	static const Color Black;   /// Black predefined color
	static const Color White;   /// White predefined color
	static const Color Red;     /// Red predefined color
	static const Color Green;   /// Green predefined color
	static const Color Blue;    /// Blue predefined color
	static const Color Yellow;  /// Yellow predefined color
	static const Color Magenta; /// Magenta predefined color
	static const Color Cyan;    /// Cyan predefined color
};


#endif /* COLOR_HPP_ */