lab.h File Reference

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Data Structures
struct	rgb_struct
struct	xyz_struct
struct	lab_struct

Typedefs
typedef struct rgb_struct	color_rgb
typedef struct xyz_struct	color_xyz
typedef struct lab_struct	color_lab

Functions
color_xyz	RGB2XYZ (color_rgb color)
color_rgb	XYZ2RGB (color_xyz color)
color_lab	RGB2LAB (color_rgb color)
void	LAB2RGB_real_01 (double *color)
color_rgb	LAB2RGB (color_lab color)
color_rgb	color_rgb_init (double r, double g, double b)
color_xyz	color_xyz_init (double x, double y, double z)
color_lab	color_lab_init (double l, double a, double b)
QuadTree	lab_gamut_quadtree (const int *lightness, int max_qtree_level)
	construct a quadtree of the LAB gamut points
double *	lab_gamut (const int *lightness, int *n)
double *	color_blend_rgb2lab (const char *color_list, const int maxpoints)

Typedef Documentation

color_lab

typedef struct lab_struct color_lab

Definition at line 26 of file lab.h.

color_rgb

typedef struct rgb_struct color_rgb

Definition at line 16 of file lab.h.

color_xyz

typedef struct xyz_struct color_xyz

Definition at line 21 of file lab.h.

Function Documentation

color_blend_rgb2lab()

double * color_blend_rgb2lab	(	const char *	color_list,
		const int	maxpoints
	)

derive around maxpoints from a color list

Parameters

color_list	List of the form "#ff0000,#00ff00,..."
maxpoints	Maximum number of points to return

Returns

An array of size [maxpoints*3] of the form {{l,a,b},...}

Definition at line 212 of file lab.c.

References lab_struct::a, rgb_struct::b, lab_struct::b, color_palettes_get(), free(), rgb_struct::g, gv_calloc(), lab_struct::l, lab_dist(), lab_interpolate(), MAX, NULL, rgb_struct::r, RGB2LAB(), and Verbose.

Referenced by node_distinct_coloring().

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color_lab_init()

color_lab color_lab_init	(	double	l,
		double	a,
		double	b
	)

Definition at line 36 of file lab.c.

References lab_struct::a, lab_struct::b, and lab_struct::l.

Referenced by node_distinct_coloring_internal2(), and RGB2LAB().

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color_rgb_init()

color_rgb color_rgb_init	(	double	r,
		double	g,
		double	b
	)

Definition at line 23 of file lab.c.

References rgb_struct::b, rgb_struct::g, and rgb_struct::r.

Referenced by XYZ2RGB().

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color_xyz_init()

color_xyz color_xyz_init	(	double	x,
		double	y,
		double	z
	)

Definition at line 29 of file lab.c.

References xyz_struct::x, xyz_struct::y, xyz_struct::z, and z.

Referenced by LAB2RGB(), RGB2LAB(), and RGB2XYZ().

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LAB2RGB()

color_rgb LAB2RGB

(

color_lab

color

)

Definition at line 87 of file lab.c.

References rgb_struct::b, color(), color_xyz_init(), xyz_struct::x, XYZ2RGB(), XYZEpsilon, XYZKappa, xyz_struct::y, xyz_struct::z, and z.

Referenced by LAB2RGB_real_01(), and node_distinct_coloring_internal2().

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LAB2RGB_real_01()

void LAB2RGB_real_01

(

double *

color

)

Definition at line 74 of file lab.c.

References lab_struct::a, rgb_struct::b, lab_struct::b, color(), rgb_struct::g, lab_struct::l, LAB2RGB(), and rgb_struct::r.

Referenced by node_distinct_coloring_internal2().

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lab_gamut()

double * lab_gamut	(	const int *	lightness,
		int *	n
	)

give a list of n points in the file defining the LAB color gamut

Definition at line 144 of file lab.c.

References gv_calloc(), lab_gamut_data, lab_gamut_data_size, PRISIZE_T, and Verbose.

Referenced by lab_gamut_quadtree().

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lab_gamut_quadtree()

QuadTree lab_gamut_quadtree	(	const int *	lightness,
		int	max_qtree_level
	)

Definition at line 186 of file lab.c.

References dim, free(), lab_gamut(), NULL, and QuadTree_new_from_point_list().

Referenced by node_distinct_coloring().

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RGB2LAB()

color_lab RGB2LAB

(

color_rgb

color

)

Definition at line 62 of file lab.c.

References A, B, color(), color_lab_init(), color_xyz_init(), L, MAX, PivotXYZ(), RGB2XYZ(), xyz_struct::x, xyz_struct::y, xyz_struct::z, and z.

Referenced by color_blend_rgb2lab(), and node_distinct_coloring_internal2().

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RGB2XYZ()

color_xyz RGB2XYZ

(

color_rgb

color

)

Definition at line 55 of file lab.c.

References color(), color_xyz_init(), and PivotRgb().

Referenced by RGB2LAB().

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XYZ2RGB()

color_rgb XYZ2RGB

(

color_xyz

color

)

Definition at line 112 of file lab.c.

References color(), color_rgb_init(), MAX, MIN, and z.

Referenced by LAB2RGB().

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