## GimpCMYK GimpCMYK — Definitions and Functions relating to CMYK colors. |

## Synopsis

                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);

## Description

Definitions and Functions relating to CMYK colors.

## Details

### GimpCMYK

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

### 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