GimpColorProfile *
gimp_color_config_get_gray_color_profile (GimpColorConfig *config,
GError **error)
{
GimpColorProfile *profile = NULL;
g_return_val_if_fail (GIMP_IS_COLOR_CONFIG (config), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (config->gray_profile)
{
GFile *file = g_file_new_for_path (config->gray_profile);
profile = gimp_color_profile_new_from_file (file, error);
if (profile && ! gimp_color_profile_is_gray (profile))
{
g_object_unref (profile);
profile = NULL;
g_set_error (error, GIMP_CONFIG_ERROR, 0,
_("Color profile '%s' is not for GRAY color space."),
gimp_file_get_utf8_name (file));
}
g_object_unref (file);
}
return profile;
}
/**
* gimp_color_profile_is_linear:
* @profile: a #GimpColorProfile
*
* 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;
*
* Return value: %TRUE if the profile is a matrix shaping profile with linear
* TRCs, %FALSE otherwise.
*
* Since: 2.10
**/
gboolean
gimp_color_profile_is_linear (GimpColorProfile *profile)
{
cmsHPROFILE prof;
cmsToneCurve *curve;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
prof = profile->priv->lcms_profile;
if (! cmsIsMatrixShaper (prof))
return FALSE;
if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_INPUT))
return FALSE;
if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_OUTPUT))
return FALSE;
if (gimp_color_profile_is_rgb (profile))
{
curve = cmsReadTag(prof, cmsSigRedTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
curve = cmsReadTag (prof, cmsSigGreenTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
curve = cmsReadTag (prof, cmsSigBlueTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
}
else if (gimp_color_profile_is_gray (profile))
{
curve = cmsReadTag(prof, cmsSigGrayTRCTag);
if (curve == NULL || ! cmsIsToneCurveLinear (curve))
return FALSE;
}
else
{
return FALSE;
}
return TRUE;
}
gboolean
gimp_image_validate_color_profile (GimpImage *image,
GimpColorProfile *profile,
gboolean *is_builtin,
GError **error)
{
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (gimp_image_get_base_type (image) == GIMP_GRAY)
{
if (! gimp_color_profile_is_gray (profile))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("ICC profile validation failed: "
"Color profile is not for GRAY color space"));
return FALSE;
}
}
else
{
if (! gimp_color_profile_is_rgb (profile))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("ICC profile validation failed: "
"Color profile is not for RGB color space"));
return FALSE;
}
}
if (is_builtin)
{
GimpColorProfile *builtin;
builtin = gimp_image_get_builtin_color_profile (image);
*is_builtin = gimp_color_profile_is_equal (profile, builtin);
}
return TRUE;
}
static void
gimp_color_config_set_gray_profile (GimpColorConfig *config,
const gchar *filename,
GError **error)
{
gboolean success = TRUE;
if (filename)
{
GimpColorProfile *profile;
GFile *file = g_file_new_for_path (filename);
profile = gimp_color_profile_new_from_file (file, error);
if (profile)
{
if (! gimp_color_profile_is_gray (profile))
{
g_set_error (error, GIMP_CONFIG_ERROR, 0,
_("Color profile '%s' is not for GRAY color space."),
gimp_file_get_utf8_name (file));
success = FALSE;
}
g_object_unref (profile);
}
else
{
success = FALSE;
}
g_object_unref (file);
}
if (success)
{
g_free (config->gray_profile);
config->gray_profile = g_strdup (filename);
}
}
static GimpColorProfile *
gimp_color_profile_new_from_color_profile (GimpColorProfile *profile,
gboolean linear)
{
GimpColorProfile *new_profile;
cmsHPROFILE target_profile;
GimpMatrix3 matrix = { 0, };
cmsCIEXYZ *whitepoint;
cmsToneCurve *curve;
const gchar *model;
gchar *new_model;
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
if (gimp_color_profile_is_rgb (profile))
{
if (! gimp_color_profile_get_rgb_matrix_colorants (profile, &matrix))
return NULL;
}
else if (! gimp_color_profile_is_gray (profile))
{
return NULL;
}
whitepoint = cmsReadTag (profile->priv->lcms_profile,
cmsSigMediaWhitePointTag);
target_profile = cmsCreateProfilePlaceholder (0);
cmsSetProfileVersion (target_profile, 4.3);
cmsSetDeviceClass (target_profile, cmsSigDisplayClass);
cmsSetPCS (target_profile, cmsSigXYZData);
cmsWriteTag (target_profile, cmsSigMediaWhitePointTag, whitepoint);
if (linear)
{
/* linear light */
curve = cmsBuildGamma (NULL, 1.00);
gimp_color_profile_set_tag (target_profile, cmsSigProfileDescriptionTag,
"linear TRC variant generated by GIMP");
}
else
{
cmsFloat64Number srgb_parameters[5] =
{ 2.4, 1.0 / 1.055, 0.055 / 1.055, 1.0 / 12.92, 0.04045 };
/* sRGB curve */
curve = cmsBuildParametricToneCurve (NULL, 4, srgb_parameters);
gimp_color_profile_set_tag (target_profile, cmsSigProfileDescriptionTag,
"sRGB TRC variant generated by GIMP");
}
if (gimp_color_profile_is_rgb (profile))
{
cmsCIEXYZ red;
cmsCIEXYZ green;
cmsCIEXYZ blue;
cmsSetColorSpace (target_profile, cmsSigRgbData);
red.X = matrix.coeff[0][0];
red.Y = matrix.coeff[0][1];
red.Z = matrix.coeff[0][2];
green.X = matrix.coeff[1][0];
green.Y = matrix.coeff[1][1];
green.Z = matrix.coeff[1][2];
blue.X = matrix.coeff[2][0];
blue.Y = matrix.coeff[2][1];
blue.Z = matrix.coeff[2][2];
cmsWriteTag (target_profile, cmsSigRedColorantTag, &red);
cmsWriteTag (target_profile, cmsSigGreenColorantTag, &green);
cmsWriteTag (target_profile, cmsSigBlueColorantTag, &blue);
cmsWriteTag (target_profile, cmsSigRedTRCTag, curve);
cmsWriteTag (target_profile, cmsSigGreenTRCTag, curve);
cmsWriteTag (target_profile, cmsSigBlueTRCTag, curve);
}
else
{
cmsSetColorSpace (target_profile, cmsSigGrayData);
cmsWriteTag (target_profile, cmsSigGrayTRCTag, curve);
}
cmsFreeToneCurve (curve);
model = gimp_color_profile_get_model (profile);
if (model && g_str_has_prefix (model, "Generated from '"))
{
/* don't add multiple "Generated from 'foo'" */
new_model = g_strdup (model);
}
else
{
new_model = g_strdup_printf ("Generated from '%s'",
gimp_color_profile_get_description (profile));
}
gimp_color_profile_set_tag (target_profile, cmsSigDeviceMfgDescTag,
"GIMP");
gimp_color_profile_set_tag (target_profile, cmsSigDeviceModelDescTag,
new_model);
gimp_color_profile_set_tag (target_profile, cmsSigCopyrightTag,
"Public Domain");
g_free (new_model);
new_profile = gimp_color_profile_new_from_lcms_profile (target_profile, NULL);
cmsCloseProfile (target_profile);
return new_profile;
}
