qualpal::colors::HSL Class Reference

HSL (Hue, Saturation, Lightness) color representation. More...

#include <colors.h>

Public Member Functions
	HSL ()
	Default constructor initializes HSL to black (0,0,0)
	HSL (const double h, const double s, const double l)
	Construct HSL from component values.
	HSL (const RGB &rgb)
	Construct HSL from RGB color.
	HSL (const XYZ &xyz)
	Construct HSL from XYZ color.
	HSL (const Lab &lab)
	Construct HSL from Lab color.
	HSL (const LCHab &lch)
	Construct HSL from LCHab color.
bool	operator== (const HSL &other) const
	Equality operator for HSL colors.
bool	operator!= (const HSL &other) const
	Inequality operator for HSL colors.
double	h () const
	Get hue in degrees [0,360)
double	s () const
	Get saturation [0,1].
double	l () const
	Get lightness [0,1].

Detailed Description

HSL (Hue, Saturation, Lightness) color representation.

Represents a color in the HSL color space:

• Hue: [0, 360) degrees (0 = red, 120 = green, 240 = blue)
• Saturation: [0, 1] (0 = gray, 1 = fully saturated)
• Lightness: [0, 1] (0 = black, 1 = white)

Provides conversion constructors for RGB, XYZ, Lab, and LCHab color spaces.

HSL orange(30, 1.0, 0.5);    // Pure orange
HSL gray(0, 0.0, 0.5);       // Medium gray
HSL from_rgb(RGB(0.5, 0.2, 0.7));

See also

RGB, XYZ, Lab, LCHab for conversions.

Definition at line 217 of file colors.h.

Constructor & Destructor Documentation

HSL() [1/5]

qualpal::colors::HSL::HSL	(	const double	h,
		const double	s,
		const double	l
	)

Construct HSL from component values.

Parameters

h	Hue in degrees [0,360)
s	Saturation [0,1]
l	Lightness [0,1]

HSL() [2/5]

qualpal::colors::HSL::HSL

(

const RGB &

rgb

)

Construct HSL from RGB color.

Parameters

rgb	RGB color to convert from

HSL() [3/5]

qualpal::colors::HSL::HSL

(

const XYZ &

xyz

)

Construct HSL from XYZ color.

Parameters

xyz	XYZ color to convert from

HSL() [4/5]

qualpal::colors::HSL::HSL

(

const Lab &

lab

)

Construct HSL from Lab color.

Parameters

lab	Lab color to convert from

HSL() [5/5]

qualpal::colors::HSL::HSL

(

const LCHab &

lch

)

Construct HSL from LCHab color.

Parameters

lch	LCHab color to convert from

Member Function Documentation

h()

double qualpal::colors::HSL::h ( ) const

inline

Get hue in degrees [0,360)

Definition at line 281 of file colors.h.

l()

double qualpal::colors::HSL::l ( ) const

inline

Get lightness [0,1].

Definition at line 285 of file colors.h.

operator!=()

bool qualpal::colors::HSL::operator!= ( const HSL &  other ) const

inline

Inequality operator for HSL colors.

Parameters

other

Other HSL color to compare with

Returns

true if HSL colors are not equal, false otherwise

Definition at line 278 of file colors.h.

operator==()

bool qualpal::colors::HSL::operator== ( const HSL &  other ) const

inline

Equality operator for HSL colors.

Parameters

other

Other HSL color to compare with

Returns

true if both HSL colors are equal, false otherwise

Definition at line 267 of file colors.h.

s()

double qualpal::colors::HSL::s ( ) const

inline

Get saturation [0,1].

Definition at line 283 of file colors.h.

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

• include/qualpal/colors.h