PLib::Color Class Reference

A class for a RGB color. More...

#include <color.h>

List of all members.

Public Member Functions
	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

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Member Function Documentation

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

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

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

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

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

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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

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

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

• color.h

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