GimpCMYK

GimpCMYK — Definitions and Functions relating to CMYK colors.

Synopsis

struct              GimpCMYK;
void                gimp_cmyk_set                       (GimpCMYK *cmyk,
                                                         gdouble cyan,
                                                         gdouble magenta,
                                                         gdouble yellow,
                                                         gdouble black);
void                gimp_cmyk_set_uchar                 (GimpCMYK *cmyk,
                                                         guchar cyan,
                                                         guchar magenta,
                                                         guchar yellow,
                                                         guchar black);
void                gimp_cmyk_get_uchar                 (const GimpCMYK *cmyk,
                                                         guchar *cyan,
                                                         guchar *magenta,
                                                         guchar *yellow,
                                                         guchar *black);
void                gimp_cmyka_set                      (GimpCMYK *cmyka,
                                                         gdouble cyan,
                                                         gdouble magenta,
                                                         gdouble yellow,
                                                         gdouble black,
                                                         gdouble alpha);
void                gimp_cmyka_set_uchar                (GimpCMYK *cmyka,
                                                         guchar cyan,
                                                         guchar magenta,
                                                         guchar yellow,
                                                         guchar black,
                                                         guchar alpha);
void                gimp_cmyka_get_uchar                (const GimpCMYK *cmyka,
                                                         guchar *cyan,
                                                         guchar *magenta,
                                                         guchar *yellow,
                                                         guchar *black,
                                                         guchar *alpha);
#define             GIMP_TYPE_CMYK

Description

Definitions and Functions relating to CMYK colors.

Details

struct GimpCMYK

struct GimpCMYK {
  gdouble c, m, y, k, a;
};

Used to keep CMYK and CMYKA colors. All components are in a range of [0.0..1.0]. An alpha value is somewhat useless in the CMYK colorspace, but we keep one around anyway so color conversions going to CMYK and back can preserve alpha.

gdouble c;

 the cyan component

gdouble m;

 the magenta component

gdouble y;

 the yellow component

gdouble k;

 the black component

gdouble a;

 the alpha component

gimp_cmyk_set ()

void                gimp_cmyk_set                       (GimpCMYK *cmyk,
                                                         gdouble cyan,
                                                         gdouble magenta,
                                                         gdouble yellow,
                                                         gdouble black);

Very basic initialiser for the internal GimpCMYK structure. Channel values are doubles in the range 0 to 1.

cmyk :

 A GimpCMYK structure which will hold the specified CMYK value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

gimp_cmyk_set_uchar ()

void                gimp_cmyk_set_uchar                 (GimpCMYK *cmyk,
                                                         guchar cyan,
                                                         guchar magenta,
                                                         guchar yellow,
                                                         guchar black);

The same as gimp_cmyk_set(), except that channel values are unsigned chars in the range 0 to 255.

cmyk :

 A GimpCMYK structure which will hold the specified CMYK value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

gimp_cmyk_get_uchar ()

void                gimp_cmyk_get_uchar                 (const GimpCMYK *cmyk,
                                                         guchar *cyan,
                                                         guchar *magenta,
                                                         guchar *yellow,
                                                         guchar *black);

Retrieve individual channel values from a GimpCMYK structure. Channel values are pointers to unsigned chars in the range 0 to 255.

cmyk :

 A GimpCMYK structure which will hold the specified CMYK value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

gimp_cmyka_set ()

void                gimp_cmyka_set                      (GimpCMYK *cmyka,
                                                         gdouble cyan,
                                                         gdouble magenta,
                                                         gdouble yellow,
                                                         gdouble black,
                                                         gdouble alpha);

Initialiser for the internal GimpCMYK structure. Channel values are doubles in the range 0 to 1.

cmyka :

 A GimpCMYK structure which will hold the specified CMYKA value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

alpha :

 The Alpha channel

gimp_cmyka_set_uchar ()

void                gimp_cmyka_set_uchar                (GimpCMYK *cmyka,
                                                         guchar cyan,
                                                         guchar magenta,
                                                         guchar yellow,
                                                         guchar black,
                                                         guchar alpha);

The same as gimp_cmyka_set(), except that channel values are unsigned chars in the range 0 to 255.

cmyka :

 A GimpCMYK structure which will hold the specified CMYKA value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

alpha :

 The Alpha channel

gimp_cmyka_get_uchar ()

void                gimp_cmyka_get_uchar                (const GimpCMYK *cmyka,
                                                         guchar *cyan,
                                                         guchar *magenta,
                                                         guchar *yellow,
                                                         guchar *black,
                                                         guchar *alpha);

Retrieve individual channel values from a GimpCMYK structure. Channel values are pointers to unsigned chars in the range 0 to 255.

cmyka :

 A GimpCMYK structure which will hold the specified CMYKA value.

cyan :

 The Cyan channel of the CMYK value

magenta :

 The Magenta channel

yellow :

 The Yellow channel

black :

 The blacK channel

alpha :

 The Alpha channel

GIMP_TYPE_CMYK

#define GIMP_TYPE_CMYK       (gimp_cmyk_get_type ())

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