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PLib::Color Class Reference

A class for a RGB color. More...

#include <color.h>

List of all members.

Public Methods
	Color (const unsigned char R=0, const unsigned char G=0, const unsigned char B=0)
Color &	operator+= (const Color &a)
Color &	operator-= (const Color &a)
Color &	operator *= (double a)
Color &	operator/= (double a)
Color &	operator= (const Color &a)
void	fromXYZ (double x, double y, double z)
void	toXYZ (double &x, double &y, double &z)
void	fromYIQ (double q, double i, double y)
void	toYIQ (double &q, double &i, double &y)
void	fromHSV (double h, double s, double v)
void	toHSV (double &h, double &s, double &v)
Public Attributes
unsigned char	r
unsigned char	g
unsigned char	b
Friends
Color	operator * (const double d, const Color &a)
Color	operator * (const Color &a, const Color &b)
Color	operator+ (const Color &a, const Color &b)
ostream &	operator<< (ostream &os, const Color &point)
istream &	operator>> (istream &os, Color &point)

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Detailed Description

A class for a RGB color.

Defines a class containing the RGB component of a color pixel. Each component is an unsigned char valid for the range [0..255].

Author:

Philippe Lavoie

Date:

4 October 1996

Definition at line 45 of file color.h.

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Member Function Documentation

void PLib::Color::fromHSV (  double    h, double    s, double    v )  [inline]

from the HSV color space. Parameters: h  hue valid inside [0,360] s  saturation valid inside [0,1] v  value valid inside [0,1] Author: Philippe Lavoie Date: 14 May 1999 Definition at line 255 of file color.h.

void PLib::Color::fromXYZ (  double    x, double    y, double    z )  [inline]

transforms from the XYZ color space to the RGB colorspace. Author: Philippe Lavoie Date: 17 March 1999 Definition at line 196 of file color.h.

void PLib::Color::fromYIQ (  double    y, double    i, double    q )  [inline]

transforms from the YIQ color space to the RGB colorspace. This is the same color space used by NTSC Parameters: y  the luminicance i  the chromacity q  the chromacity Author: Philippe Lavoie Date: 14 May 1999 Definition at line 218 of file color.h.

void PLib::Color::toHSV (  double &    h, double &    s, double &    v )  [inline]

to the HSV color space. Parameters: h  hue valid inside [0,360] s  saturation valid inside [0,1] v  value valid inside [0,1] Author: Philippe Lavoie Date: 14 May 1999 Definition at line 309 of file color.h.

void PLib::Color::toYIQ (  double &    y, double &    i, double &    q )  [inline]

transforms to the YIQ color space to the RGB colorspace. This is the same color space used by NTSC Parameters: y  the luminicance i  the chromacity q  the chromacity Author: Philippe Lavoie Date: 14 May 1999 Definition at line 236 of file color.h.

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Friends And Related Function Documentation

ostream& operator<< (  ostream &    os, const Color &    point )  [friend]

The output operator of a color to an ostream. Parameters: os  the ostream c  the color to output Returns: the ostream with the color $c$. Author: Philippe Lavoie Date: 24 January 1997 Definition at line 168 of file color.h.

istream& operator>> (  istream &    os, Color &    point )  [friend]

the input operator of a color from an istream. Initialize a color from an istream Parameters: os  the input stream c  the color to initialize Returns: the istream without the color Author: Philippe Lavoie Date: 24 January 1997 Definition at line 185 of file color.h.

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The documentation for this class was generated from the following file:

• color.h

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