[Printing-architecture] Make use of extended color spaces on IPP printers
msweet at msweet.org
Sun May 9 20:32:08 UTC 2021
> On May 9, 2021, at 10:03 AM, Solomon Peachy <pizza at shaftnet.org> wrote:
> On Sun, May 09, 2021 at 09:41:38AM -0400, Michael Sweet wrote:
>> So printers that support device RGB and device gray also support the
>> "printer-icc-profiles" attribute, which allows you to determine which
>> profile to use for a particular combination of Job Template
>> attributes. In some cases a single profile is reported that
>> represents the printer's internal working color space.
> Forgive my ignorance here, but am I correct in my understanding that
> this attribute provides a URI for clients to retrieve the profile?
Yes. It's actually a set (array) of profiles with any associated Job Template attributes (color mode, resolution, etc.) that might influence the profile that should be used.
> So ideally, the client should retrieve the profile and transform the
> colorspace into the appropriate DeviceXXX space, and tag the
> raster/document as such?
> Otherwise, the client should submit the document tagged with a standard
> (eg sRGB or AdobeRGB) colorspace, and let the printer do any necessary
Right. And also that the Client can use the closest matching standard color space when generating raster - use sRGB for sRGB images and AdobeRGB for AdobeRGB images, but transform to AdobeRGB for some other RGB color space to give yourself the most headroom.
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