gimp_rgb_set ()

void
gimp_rgb_set (GimpRGB *rgb,
              gdouble red,
              gdouble green,
              gdouble blue);

Sets the red, green and blue components of rgb and leaves the alpha component unchanged. The color values should be between 0.0 and 1.0 but there is no check to enforce this and the values are set exactly as they are passed in.

gimp_rgb_set_alpha ()

void
gimp_rgb_set_alpha (GimpRGB *rgb,
                    gdouble alpha);

Sets the alpha component of rgb and leaves the RGB components unchanged.

gimp_rgb_set_uchar ()

void
gimp_rgb_set_uchar (GimpRGB *rgb,
                    guchar red,
                    guchar green,
                    guchar blue);

Sets the red, green and blue components of rgb from 8bit values (0 to 255) and leaves the alpha component unchanged.

gimp_rgb_get_uchar ()

void
gimp_rgb_get_uchar (const GimpRGB *rgb,
                    guchar *red,
                    guchar *green,
                    guchar *blue);

gimp_rgb_parse_name ()

gboolean
gimp_rgb_parse_name (GimpRGB *rgb,
                     const gchar *name,
                     gint len);

Attempts to parse a color name. This function accepts SVG 1.0 color keywords.

This function does not touch the alpha component of rgb .

Since: GIMP 2.2

gimp_rgb_parse_hex ()

gboolean
gimp_rgb_parse_hex (GimpRGB *rgb,
                    const gchar *hex,
                    gint len);

Attempts to parse a string describing an RGB color in hexadecimal notation (optionally prefixed with a '#').

This function does not touch the alpha component of rgb .

Since: GIMP 2.2

gimp_rgb_parse_css ()

gboolean
gimp_rgb_parse_css (GimpRGB *rgb,
                    const gchar *css,
                    gint len);

Attempts to parse a string describing an RGB color in CSS notation. This can be either a numerical representation (rgb(255,0,0) or rgb(100%,0%,0%)) or a hexadecimal notation as parsed by gimp_rgb_parse_hex() (#ff0000) or a color name as parsed by gimp_rgb_parse_name() (red).

This function does not touch the alpha component of rgb .

Since: GIMP 2.2

gimp_rgb_list_names ()

gint
gimp_rgb_list_names (const gchar ***names,
                     GimpRGB **colors);

Allows to retrieve the list of SVG 1.0 color keywords that is used by gimp_rgb_parse_name().

The returned strings are const and must not be freed. Only the two arrays are allocated dynamically. You must call g_free() on the names and colors arrays when they are not any longer needed.

Since: GIMP 2.2

gimp_rgb_add ()

void
gimp_rgb_add (GimpRGB *rgb1,
              const GimpRGB *rgb2);

gimp_rgb_subtract ()

void
gimp_rgb_subtract (GimpRGB *rgb1,
                   const GimpRGB *rgb2);

gimp_rgb_multiply ()

void
gimp_rgb_multiply (GimpRGB *rgb1,
                   gdouble factor);

gimp_rgb_distance ()

gdouble
gimp_rgb_distance (const GimpRGB *rgb1,
                   const GimpRGB *rgb2);

gimp_rgb_max ()

gdouble
gimp_rgb_max (const GimpRGB *rgb);

gimp_rgb_min ()

gdouble
gimp_rgb_min (const GimpRGB *rgb);

gimp_rgb_clamp ()

void
gimp_rgb_clamp (GimpRGB *rgb);

gimp_rgb_gamma ()

void
gimp_rgb_gamma (GimpRGB *rgb,
                gdouble gamma);

gimp_rgb_luminance ()

gdouble
gimp_rgb_luminance (const GimpRGB *rgb);

Since: GIMP 2.4

gimp_rgb_luminance_uchar ()

guchar
gimp_rgb_luminance_uchar (const GimpRGB *rgb);

Since: GIMP 2.4

gimp_rgb_intensity ()

gdouble
gimp_rgb_intensity (const GimpRGB *rgb);

This function is deprecated! Use gimp_rgb_luminance() instead.

gimp_rgb_intensity_uchar ()

guchar
gimp_rgb_intensity_uchar (const GimpRGB *rgb);

This function is deprecated! Use gimp_rgb_luminance_uchar() instead.

gimp_rgb_composite ()

void
gimp_rgb_composite (GimpRGB *color1,
                    const GimpRGB *color2,
                    GimpRGBCompositeMode mode);

gimp_rgba_set ()

void
gimp_rgba_set (GimpRGB *rgba,
               gdouble red,
               gdouble green,
               gdouble blue,
               gdouble alpha);

Sets the red, green, blue and alpha components of rgb . The values should be between 0.0 and 1.0 but there is no check to enforce this and the values are set exactly as they are passed in.

gimp_rgba_set_uchar ()

void
gimp_rgba_set_uchar (GimpRGB *rgba,
                     guchar red,
                     guchar green,
                     guchar blue,
                     guchar alpha);

Sets the red, green, blue and alpha components of rgb from 8bit values (0 to 255).

gimp_rgba_get_uchar ()

void
gimp_rgba_get_uchar (const GimpRGB *rgba,
                     guchar *red,
                     guchar *green,
                     guchar *blue,
                     guchar *alpha);

gimp_rgba_parse_css ()

gboolean
gimp_rgba_parse_css (GimpRGB *rgba,
                     const gchar *css,
                     gint len);

Similar to gimp_rgb_parse_css() but handles RGB colors with alpha channel in the numerical CSS notation (rgba(255,0,0,255) or rgba(100%,0%,0%,1000%)).

It doesn't handle the hexadecimal notation or color names because they leave the alpha channel unspecified.

Since: GIMP 2.2

gimp_rgba_add ()

void
gimp_rgba_add (GimpRGB *rgba1,
               const GimpRGB *rgba2);

gimp_rgba_subtract ()

void
gimp_rgba_subtract (GimpRGB *rgba1,
                    const GimpRGB *rgba2);

gimp_rgba_multiply ()

void
gimp_rgba_multiply (GimpRGB *rgba,
                    gdouble factor);

gimp_rgba_distance ()

gdouble
gimp_rgba_distance (const GimpRGB *rgba1,
                    const GimpRGB *rgba2);

GIMP_RGB_LUMINANCE()

#define             GIMP_RGB_LUMINANCE(r,g,b)

GIMP_RGB_INTENSITY()

#define             GIMP_RGB_INTENSITY(r,g,b)

gimp_param_spec_rgb ()

GParamSpec *
gimp_param_spec_rgb (const gchar *name,
                     const gchar *nick,
                     const gchar *blurb,
                     gboolean has_alpha,
                     const GimpRGB *default_value,
                     GParamFlags flags);

Creates a param spec to hold an GimpRGB value. See g_param_spec_internal() for more information.

Since: GIMP 2.4

gimp_param_spec_rgb_has_alpha ()

gboolean
gimp_param_spec_rgb_has_alpha (GParamSpec *pspec);

Since: GIMP 2.4

GIMP_VALUE_HOLDS_RGB()

#define GIMP_VALUE_HOLDS_RGB(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GIMP_TYPE_RGB))

gimp_value_get_rgb ()

void
gimp_value_get_rgb (const GValue *value,
                    GimpRGB *rgb);

gimp_value_set_rgb ()

void
gimp_value_set_rgb (GValue *value,
                    const GimpRGB *rgb);

struct GimpRGB

struct GimpRGB {
  gdouble r, g, b, a;
};

Used to keep RGB and RGBA colors. All components are in a range of [0.0..1.0].

enum GimpRGBCompositeMode

GIMP_RGB_LUMINANCE_RED

#define GIMP_RGB_LUMINANCE_RED    (0.2126)

GIMP_RGB_LUMINANCE_GREEN

#define GIMP_RGB_LUMINANCE_GREEN  (0.7152)

GIMP_RGB_LUMINANCE_BLUE

#define GIMP_RGB_LUMINANCE_BLUE   (0.0722)

GIMP_RGB_INTENSITY_RED

#define GIMP_RGB_INTENSITY_RED    (0.30)

GIMP_RGB_INTENSITY_GREEN

#define GIMP_RGB_INTENSITY_GREEN  (0.59)

GIMP_RGB_INTENSITY_BLUE

#define GIMP_RGB_INTENSITY_BLUE   (0.11)

GIMP_TYPE_RGB

#define GIMP_TYPE_RGB               (gimp_rgb_get_type ())

GIMP_TYPE_PARAM_RGB

#define GIMP_TYPE_PARAM_RGB           (gimp_param_rgb_get_type ())