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improve docs for icc_*

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note use of _get_typeof() to spot embedded profiles, see

https://github.com/jcupitt/libvips/issues/511
This commit is contained in:
John Cupitt 2016-09-04 06:13:54 +01:00
parent 881f340610
commit e971a50700
1 changed files with 12 additions and 1 deletions
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13
libvips/colour/icc_transform.c
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@ -1265,7 +1265,11 @@ vips_icc_ac2rc( VipsImage *in, VipsImage **out, const char *profile_filename )
*
* If @embedded is set, the input profile is taken from the input image
* metadata. If there is no embedded profile,
* @input_profile_filename is used as a fall-back.
* @input_profile_filename is used as a fall-back.
* You can test for the
* presence of an embedded profile with
* vips_image_get_typeof() with #VIPS_META_ICC_NAME as an argument. This will
* return %GType 0 if there is no profile.
*
* If @embedded is not set, the input profile is taken from
* @input_profile. If @input_profile is not supplied, the
@ -1342,11 +1346,18 @@ vips_icc_export( VipsImage *in, VipsImage **out, ... )
* If @embedded is set, the input profile is taken from the input image
* metadata, if present. If there is no embedded profile,
* @input_profile is used as a fall-back.
* You can test for the
* presence of an embedded profile with
* vips_image_get_typeof() with #VIPS_META_ICC_NAME as an argument. This will
* return %GType 0 if there is no profile.
*
* If @embedded is not set, the input profile is taken from
* @input_profile. If @input_profile is not supplied, the
* metadata profile, if any, is used as a fall-back.
*
* The output image has the output profile attached to the #VIPS_META_ICC_NAME
* field.
*
* Use vips_icc_import() and vips_icc_export() to do either the first or
* second half of this operation in isolation.
*