[Openicc] Questions about... QT and colormanagement

[Cyrille Berger]

On Thursday 31 January 2008, Jan-Peter Homann wrote:
> Hello Cyrill, hello list,
> Did I understand, that QT is able e.g. to handle Images and
> Vectorgraphics in the CMYK colorspace and to rasterize an esemble of
> this objects to a CMYK bytemap file. (Same as for RGB).
No, it's limited to color input. And I suspect that it just converted to RGB 
internally. Qt doesn't have proper color management. Nor as Cairo (even if I 
think that some work has started in Cairo for that).

> Would it be e.g. possible to create some kind of " virtual output
> device" for QT Which buffers the rasterized bytemap. For displaying the
> virtual bytemap on the monitor, a source profile is assigned to the
> bytemap and from this it will be transformed to the monitor profile.
Yes that's more or less how we work currently when using Qt. Except to one 
point, it's a bad idea performance wise to raster to a bytemap instead 
directly on screen, so you usually want to do the color transformation before 
using Qt.

-- 
Cyrille Berger