## 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