[poppler] Color Management

Leonard Rosenthol leonardr at pdfsages.com
Sat Aug 9 20:19:42 PDT 2008

On Aug 7, 2008, at 10:28 PM, Hal V. Engel wrote:
> Isn't the use of ICC Profiles in PDFs an integral part of the PDF  
> specification?

	Yes.  In fact, the new ISO 32000 makes the use of ICC profiles  
mandatory for correct rendering by a "conforming viewer".

> If I have an image with a BetaRGB profile embedded into the image  
> (this has a wide gamut and unless color managed will not be  
> displayed correctly) as part of a PDF how does poppler transform  
> that image to the monitor color space?

	It uses the alternate colorspace - which I'll assume to be DeviceRGB  
in this case.

> I notice in GfxState that there is logic for deciding if an object  
> uses an ICC based color space (IE. virtual GfxColorSpaceMode  
> getMode() { return csICCBased; }).   If there is no color management  
> support what is being done with this information?

	Informational and also to know if it has to fall back to the alternate.


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