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GimpColorProfile

GimpColorProfile — Definitions and Functions relating to LCMS.

Functions

GimpColorProfile * gimp_color_profile_new_rgb_srgb ()
GimpColorProfile * gimp_color_profile_new_rgb_srgb_linear ()
GimpColorProfile * gimp_color_profile_new_rgb_adobe ()
GimpColorProfile * gimp_color_profile_new_d65_gray_srgb_trc ()
GimpColorProfile * gimp_color_profile_new_d65_gray_linear ()
GimpColorProfile * gimp_color_profile_new_d50_gray_lab_trc ()
GimpColorProfile * gimp_color_profile_new_srgb_trc_from_color_profile ()
GimpColorProfile * gimp_color_profile_new_linear_from_color_profile ()
GimpColorProfile * gimp_color_profile_new_from_file ()
GimpColorProfile * gimp_color_profile_new_from_icc_profile ()
GimpColorProfile * gimp_color_profile_new_from_lcms_profile ()
gboolean gimp_color_profile_save_to_file ()
const guint8 * gimp_color_profile_get_icc_profile ()
gpointer gimp_color_profile_get_lcms_profile ()
const gchar * gimp_color_profile_get_description ()
const gchar * gimp_color_profile_get_manufacturer ()
const gchar * gimp_color_profile_get_model ()
const gchar * gimp_color_profile_get_copyright ()
const gchar * gimp_color_profile_get_label ()
const gchar * gimp_color_profile_get_summary ()
gboolean gimp_color_profile_is_equal ()
gboolean gimp_color_profile_is_rgb ()
gboolean gimp_color_profile_is_gray ()
gboolean gimp_color_profile_is_cmyk ()
gboolean gimp_color_profile_is_linear ()
const Babl * gimp_color_profile_get_space ()
const Babl * gimp_color_profile_get_format ()
const Babl * gimp_color_profile_get_lcms_format ()

Description

Definitions and Functions relating to LCMS.

Functions

gimp_color_profile_new_rgb_srgb ()

GimpColorProfile *
gimp_color_profile_new_rgb_srgb (void);

This function is a replacement for cmsCreate_sRGBProfile() and returns an sRGB profile that is functionally the same as the ArgyllCMS sRGB.icm profile. "Functionally the same" means it has the same red, green, and blue colorants and the V4 "chad" equivalent of the ArgyllCMS V2 white point. The profile TRC is also functionally equivalent to the ArgyllCMS sRGB.icm TRC and is the same as the LCMS sRGB built-in profile TRC.

The actual primaries in the sRGB specification are red xy: {0.6400, 0.3300, 1.0} green xy: {0.3000, 0.6000, 1.0} blue xy: {0.1500, 0.0600, 1.0}

The sRGB primaries given below are "pre-quantized" to compensate for hexadecimal quantization during the profile-making process. Unless the profile-making code compensates for this quantization, the resulting profile's red, green, and blue colorants will deviate slightly from the correct XYZ values.

LCMS2 doesn't compensate for hexadecimal quantization. The "pre-quantized" primaries below were back-calculated from the ArgyllCMS sRGB.icm profile. The resulting sRGB profile's colorants exactly matches the ArgyllCMS sRGB.icm profile colorants.

Returns

the sRGB GimpColorProfile.

Since: 2.10


gimp_color_profile_new_rgb_srgb_linear ()

GimpColorProfile *
gimp_color_profile_new_rgb_srgb_linear
                               (void);

This function creates a profile for babl_model("RGB"). Please somebody write something smarter here.

Returns

the linear RGB GimpColorProfile.

Since: 2.10


gimp_color_profile_new_rgb_adobe ()

GimpColorProfile *
gimp_color_profile_new_rgb_adobe (void);

This function creates a profile compatible with AbobeRGB (1998).

Returns

the AdobeRGB-compatible GimpColorProfile.

Since: 2.10


gimp_color_profile_new_d65_gray_srgb_trc ()

GimpColorProfile *
gimp_color_profile_new_d65_gray_srgb_trc
                               (void);

This function creates a grayscale GimpColorProfile with an sRGB TRC. See gimp_color_profile_new_rgb_srgb().

Returns

the sRGB-gamma grayscale GimpColorProfile.

Since: 2.10


gimp_color_profile_new_d65_gray_linear ()

GimpColorProfile *
gimp_color_profile_new_d65_gray_linear
                               (void);

gimp_color_profile_new_d50_gray_lab_trc ()

GimpColorProfile *
gimp_color_profile_new_d50_gray_lab_trc
                               (void);

This function creates a grayscale GimpColorProfile with the D50 ICC profile illuminant as the profile white point and the LAB companding curve as the TRC.

Returns

a gray profile with the D50 ICC profile illuminant as the profile white point and the LAB companding curve as the TRC. as the TRC.

Since: 2.10


gimp_color_profile_new_srgb_trc_from_color_profile ()

GimpColorProfile *
gimp_color_profile_new_srgb_trc_from_color_profile
                               (GimpColorProfile *profile);

This function creates a new RGB GimpColorProfile with a sRGB gamma TRC and profile 's RGB chromacities and whitepoint.

Parameters

profile

a GimpColorProfile

 

Returns

the new GimpColorProfile, or NULL if profile is not an RGB profile or not matrix-based.

Since: 2.10


gimp_color_profile_new_linear_from_color_profile ()

GimpColorProfile *
gimp_color_profile_new_linear_from_color_profile
                               (GimpColorProfile *profile);

This function creates a new RGB GimpColorProfile with a linear TRC and profile 's RGB chromacities and whitepoint.

Parameters

profile

a GimpColorProfile

 

Returns

the new GimpColorProfile, or NULL if profile is not an RGB profile or not matrix-based.

Since: 2.10


gimp_color_profile_new_from_file ()

GimpColorProfile *
gimp_color_profile_new_from_file (GFile *file,
                                  GError **error);

This function opens an ICC color profile from file .

Parameters

file

a GFile

 

error

return location for GError

 

Returns

the GimpColorProfile, or NULL. On error, NULL is returned and error is set.

Since: 2.10


gimp_color_profile_new_from_icc_profile ()

GimpColorProfile *
gimp_color_profile_new_from_icc_profile
                               (const guint8 *data,
                                gsize length,
                                GError **error);

This function opens an ICC color profile from memory. On error, NULL is returned and error is set.

Parameters

data

pointer to memory containing an ICC profile

 

length

length of the profile in memory, in bytes

 

error

return location for GError

 

Returns

the GimpColorProfile, or NULL.

Since: 2.10


gimp_color_profile_new_from_lcms_profile ()

GimpColorProfile *
gimp_color_profile_new_from_lcms_profile
                               (gpointer lcms_profile,
                                GError **error);

This function creates a GimpColorProfile from a cmsHPROFILE. On error, NULL is returned and error is set. The passed lcms_profile pointer is not retained by the created GimpColorProfile.

Parameters

lcms_profile

an LCMS cmsHPROFILE pointer

 

error

return location for GError

 

Returns

the GimpColorProfile, or NULL.

Since: 2.10


gimp_color_profile_save_to_file ()

gboolean
gimp_color_profile_save_to_file (GimpColorProfile *profile,
                                 GFile *file,
                                 GError **error);

This function saves profile to file as ICC profile.

Parameters

profile

a GimpColorProfile

 

file

a GFile

 

error

return location for GError

 

Returns

TRUE on success, FALSE if an error occurred.

Since: 2.10


gimp_color_profile_get_icc_profile ()

const guint8 *
gimp_color_profile_get_icc_profile (GimpColorProfile *profile,
                                    gsize *length);

This function returns profile as ICC profile data. The returned memory belongs to profile and must not be modified or freed.

Parameters

profile

a GimpColorProfile

 

length

return location for the number of bytes

 

Returns

a pointer to the IIC profile data.

Since: 2.10


gimp_color_profile_get_lcms_profile ()

gpointer
gimp_color_profile_get_lcms_profile (GimpColorProfile *profile);

This function returns profile 's cmsHPROFILE. The returned value belongs to profile and must not be modified or freed.

Parameters

profile

a GimpColorProfile

 

Returns

a pointer to the cmsHPROFILE.

Since: 2.10


gimp_color_profile_get_description ()

const gchar *
gimp_color_profile_get_description (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

a string containing profile 's description. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_get_manufacturer ()

const gchar *
gimp_color_profile_get_manufacturer (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

a string containing profile 's manufacturer. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_get_model ()

const gchar *
gimp_color_profile_get_model (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

a string containing profile 's model. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_get_copyright ()

const gchar *
gimp_color_profile_get_copyright (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

a string containing profile 's copyright. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_get_label ()

const gchar *
gimp_color_profile_get_label (GimpColorProfile *profile);

This function returns a string containing profile 's "title", a string that can be used to label the profile in a user interface.

Unlike gimp_color_profile_get_description(), this function always returns a string (as a fallback, it returns "(unnamed profile)").

Parameters

profile

a GimpColorProfile

 

Returns

the profile 's label. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_get_summary ()

const gchar *
gimp_color_profile_get_summary (GimpColorProfile *profile);

This function return a string containing a multi-line summary of profile 's description, model, manufacturer and copyright, to be used as detailed information about the profile in a user interface.

Parameters

profile

a GimpColorProfile

 

Returns

the profile 's summary. The returned value belongs to profile and must not be modified or freed.

Since: 2.10


gimp_color_profile_is_equal ()

gboolean
gimp_color_profile_is_equal (GimpColorProfile *profile1,
                             GimpColorProfile *profile2);

Compares two profiles.

Parameters

profile1

a GimpColorProfile

 

profile2

a GimpColorProfile

 

Returns

TRUE if the profiles are equal, FALSE otherwise.

Since: 2.10


gimp_color_profile_is_rgb ()

gboolean
gimp_color_profile_is_rgb (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

TRUE if the profile's color space is RGB, FALSE otherwise.

Since: 2.10


gimp_color_profile_is_gray ()

gboolean
gimp_color_profile_is_gray (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

TRUE if the profile's color space is grayscale, FALSE otherwise.

Since: 2.10


gimp_color_profile_is_cmyk ()

gboolean
gimp_color_profile_is_cmyk (GimpColorProfile *profile);

Parameters

profile

a GimpColorProfile

 

Returns

TRUE if the profile's color space is CMYK, FALSE otherwise.

Since: 2.10


gimp_color_profile_is_linear ()

gboolean
gimp_color_profile_is_linear (GimpColorProfile *profile);

This function determines is the ICC profile represented by a GimpColorProfile is a linear RGB profile or not, some profiles that are LUTs though linear will also return FALSE;

Parameters

profile

a GimpColorProfile

 

Returns

TRUE if the profile is a matrix shaping profile with linear TRCs, FALSE otherwise.

Since: 2.10


gimp_color_profile_get_space ()

const Babl *
gimp_color_profile_get_space (GimpColorProfile *profile,
                              GimpColorRenderingIntent intent,
                              GError **error);

This function returns the Babl space of profile , for the specified intent .

Parameters

profile

a GimpColorProfile

 

intent

a GimpColorRenderingIntent

 

error

return location for GError

 

Returns

the new Babl space.

Since: 2.10.6


gimp_color_profile_get_format ()

const Babl *
gimp_color_profile_get_format (GimpColorProfile *profile,
                               const Babl *format,
                               GimpColorRenderingIntent intent,
                               GError **error);

This function takes a GimpColorProfile and a Babl format and returns a new Babl format with profile 's RGB primaries and TRC, and format 's pixel layout.

Parameters

profile

a GimpColorProfile

 

format

a Babl format

 

intent

a GimpColorRenderingIntent

 

error

return location for GError

 

Returns

the new Babl format.

Since: 2.10


gimp_color_profile_get_lcms_format ()

const Babl *
gimp_color_profile_get_lcms_format (const Babl *format,
                                    guint32 *lcms_format);

This function takes a Babl format and returns the lcms format to be used with that format . It also returns a Babl format to be used instead of the passed format , which usually is the same as format , unless lcms doesn't support format .

Note that this function currently only supports RGB, RGBA, R'G'B', R'G'B'A, Y, YA, Y', Y'A and the cairo-RGB24 and cairo-ARGB32 formats.

Parameters

format

a Babl format

 

lcms_format

return location for an lcms format

 

Returns

the Babl format to be used instead of format , or NULL if the passed format is not supported at all.

Since: 2.10

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