[argyllcms] Re: hplip printer driver and color management

Graeme Gill wrote:
> From the PDF 1.7 spec:
>> Note: PDF has no equivalent of the PostScript color rendering
>> dictionary. The means by
>> which a device profile is associated with a consumer application’s
>> output device are
>> implementation-dependent and cannot be specified in a PDF file.
>> Typically, this is done
>> through a color management system (CMS) that is provided by the
>> operating system.
>> Beginning with PDF 1.4, a PDF document can also specify one or more
>> output intents
>> providing possible profiles that might be used to process the
>> document (see Section
>> 10.10.4, “Output Intents”). 
> So I guess Ghostscript is lacking an obvious way of specifying the
> output profile.

The PDF spec does not seem to insist that the device profile must be
stringently an ICC profile. Ghostscript's implementation-dependent way
is currently to use a PostScript CRD, even when rasterizing PDF documents.

You can mix PS and PDF files and call gs for instance like

    gs [...options...] prologue.ps document.pdf

where prologue.ps sets up the CRD and other color-related stuff.

Regards,
Gerhard

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