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update doc

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John Cupitt 2018-01-26 15:34:52 +00:00
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doc/Using-vipsthumbnail.xml
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@ -270,7 +270,27 @@ $ ls -l tn_shark.jpg
It’ll look identical to a user, but be almost half the size.
</para>
<para>
You can also specify a fallback input profile to use if the image has no embedded one, but this is less useful.
You can also specify a fallback input profile to use if the image has no embedded one. This can often happen with CMYK images, producing an error message like:
</para>
<programlisting>
$ vipsthumbnail kgdev.jpg
vipsthumbnail: unable to thumbnail kgdev.jpg
vips_colourspace: no known route from 'cmyk' to 'srgb'
</programlisting>
<para>
If you supply a CMYK profile, it will be able to convert the image, for example:
</para>
<programlisting>
$ vipsthumbnail kgdev.jpg --iprofile /usr/share/color/icc/colord/FOGRA28L_webcoated.icc
</programlisting>
<para>
I’ve had good results with this profile:
</para>
<para>
https://github.com/jcupitt/nip2/blob/master/share/nip2/data/cmyk.icm
</para>
<para>
It makes nice-looking images from most CMYK files, and is completely free.
</para>
</refsect3>
<refsect3 id="auto-rotate">