cairo_colors.h File Reference

#include <cairo.h>
#include "color.h"

Go to the source code of this file.

Functions
void	cairo_set_source_color (cairo_t *cr, bl_color c)
void	cairo_set_source_grey (cairo_t *cr, double g)
void	cairo_set_source_white (cairo_t *cr)
void	cairo_set_source_black (cairo_t *cr)
void	cairo_set_source_hsv (cairo_t *cr, double h, double s, double v)
void	cairo_set_source_random_rgb (cairo_t *cr)
void	cairo_set_source_random_grey (cairo_t *cr)
void	cairo_clear_rgba (cairo_t *cr, double r, double g, double b, double a)
void	cairo_clear_rgb (cairo_t *cr, double r, double g, double b)
void	cairo_clear_color (cairo_t *cr, bl_color c)
void	cairo_clear_grey (cairo_t *cr, double g)
void	cairo_clear_white (cairo_t *cr)
void	cairo_clear_black (cairo_t *cr)
void	cairo_clear_hsv (cairo_t *cr, double h, double s, double v)
void	cairo_clear_random_rgb (cairo_t *cr)
void	cairo_clear_random_grey (cairo_t *cr)

Function Documentation

cairo_clear_black()

void cairo_clear_black

(

cairo_t *

cr

)

Clears the cairo context to black.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_clear_black(cr);

cairo_clear_color()

void cairo_clear_color	(	cairo_t *	cr,
		bl_color	c
	)

Clears the cairo context to a color specified by an instance of bl_color.

Parameters

cairo_t	*cr The cairo context.
bl_color	c The color to use.

Examples

bl_color c = bl_color_hsv(90, 1, 0.5);
cairo_clear_color(cr, c);

cairo_clear_grey()

void cairo_clear_grey	(	cairo_t *	cr,
		double	g
	)

Clears the cairo context to a shade of grey.

Parameters

cairo_t	*cr The cairo context.
double	g A value from 0 to 1 representing a shade of grey.

Examples

cairo_clear_grey(cr, 0.5);

cairo_clear_hsv()

void cairo_clear_hsv	(	cairo_t *	cr,
		double	h,
		double	s,
		double	v
	)

Clears the cairo context to color specified with hue, saturation and value.

Parameters

cairo_t	*cr The cairo context.
double	h The hue.
double	s The saturation.
double	v The value.

Examples

cairo_clear_hsv(cr, 90, 1, 0.5);

cairo_clear_random_grey()

void cairo_clear_random_grey

(

cairo_t *

cr

)

Clears the cairo context to a random shade of grey.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_clear_random_grey(cr);

cairo_clear_random_rgb()

void cairo_clear_random_rgb

(

cairo_t *

cr

)

Clears the cairo context to a random rgb color.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_clear_random_rgb(cr);

cairo_clear_rgb()

void cairo_clear_rgb	(	cairo_t *	cr,
		double	r,
		double	g,
		double	b
	)

Clears the cairo context to an rgb color value.

Parameters

cairo_t	*cr The cairo context.
double	r The red value.
double	g The green value.
double	b The blue value.

Examples

cairo_clear_rgb(cr, 1, 1, 1);

cairo_clear_rgba()

void cairo_clear_rgba	(	cairo_t *	cr,
		double	r,
		double	g,
		double	b,
		double	a
	)

Clears the cairo context to an rgba color value.

Parameters

cairo_t	*cr The cairo context.
double	r The red value.
double	g The green value.
double	b The blue value.
double	a The alpha value.

Examples

cairo_clear_rgba(cr, 1, 1, 1, 0.5);

cairo_clear_white()

void cairo_clear_white

(

cairo_t *

cr

)

Clears the cairo context to white.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_clear_white(cr);

cairo_set_source_black()

void cairo_set_source_black

(

cairo_t *

cr

)

Sets the drawing source color to black.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_set_source_black(cr);

cairo_set_source_color()

void cairo_set_source_color	(	cairo_t *	cr,
		bl_color	c
	)

Sets the drawing source color using an instance of bl_color.

Parameters

cairo_t	*cr The cairo context.
bl_color	c The color to use.

Examples

bl_color c = bl_color_hsv(90, 1, 0.5);
cairo_set_source_color(cr, c);

cairo_set_source_grey()

void cairo_set_source_grey	(	cairo_t *	cr,
		double	g
	)

Sets the drawing source color to a shade of grey.

Parameters

cairo_t	*cr The cairo context.
double	g A value from 0 to 1 representing a shade of grey.

Examples

cairo_set_source_grey(cr, 0.5);

cairo_set_source_hsv()

void cairo_set_source_hsv	(	cairo_t *	cr,
		double	h,
		double	s,
		double	v
	)

Sets the drawing source color using hue, saturation and value.

Parameters

cairo_t	*cr The cairo context.
double	h The hue.
double	s The saturation.
double	v The value.

Examples

cairo_set_source_hsv(90, 1, 0.5);

cairo_set_source_random_grey()

void cairo_set_source_random_grey

(

cairo_t *

cr

)

Sets the drawing source color to a random shade of grey.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_set_source_random_grey(cr);

cairo_set_source_random_rgb()

void cairo_set_source_random_rgb

(

cairo_t *

cr

)

Sets the drawing source color to a random rgb value.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_set_source_random_rgb(cr);

cairo_set_source_white()

void cairo_set_source_white

(

cairo_t *

cr

)

Sets the drawing source color to white.

Parameters

cairo_t

*cr The cairo context.

Examples

cairo_set_source_white(cr);