From: Nikolai Grigoriev (grig@renderx.com)
Date: Fri Dec 05 2003 - 15:10:34 PST
Andrzej,
> Is there any way to control the colour spaces used in a PDF
> generated by XEP?
There are rules, but there are no checks :-). You can predict what
comes out of XEP; but we have neither color conversion facilities
nor postprocessing checks to ensure that all colors match given
criteria. XEP does not (yet? :-)) replace a preflight tool.
The rules are as follows:
For images: XEP preserves the original color space.
- CMYK images remain CMYK (more precisely, /DeviceCMYK);
- RGB ones become /DeviceGRB;
- grayscales become /DeviceGray, and
- palette-based ones become /Indexed with underlying /DeviceRGB.
For colors specified directly on XSL-FO elements, rules are described
in the docs: http://xep.xattic.com/xep/doc/spec.html#Color_Specifiers.
> For example, we would like to be able to generate our PDF's where all
inline
> images are in the CMYK-SWOP colour space to get optimal colour rendition
> on our printers.
The best thing we can do is /DeviceCMYK. No calibrated color models are
currently supported: we can make CMYK but cannot embed an ICC profile.
To ensure your document is all CMYK, you will have to ensure that all your
images are originally CMYK (using CMYK TIFFs or JPEGs), and specify
all XSL-FO colors using rgb-icc() function.
Regards,
Nikolai Grigoriev
RenderX
----- Original Message -----
From: "Andrzej Jan Taramina" <andrzej@chaeron.com>
To: <xep-support@renderx.com>
Cc: "ben Clark" <bclark@digitas.com>
Sent: Saturday, December 06, 2003 1:08 AM
Subject: [xep-support] Colour spaces with XEP?
> Gentlemen:
>
> Is there any way to control the colour spaces used in a PDF generated by
XEP?
>
> For example, we would like to be able to generate our PDF's where all
inline
> images are in the CMYK-SWOP colour space to get optimal colour rendition
on
> our printers.
>
> Acrobat lets you adjust these setting on output, and we are looking for a
> similar capability within XEP.
>
> Many thanks.
>
>
> Andrzej Jan Taramina
> Chaeron Corporation: Enterprise System Solutions
> http://www.chaeron.com
>
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