[Qgis-developer] CMYK implementation in QGIS?

Alexandre Neto senhor.neto at gmail.com
Wed Dec 17 14:54:02 PST 2014

Thank you Nyall.

I will report back to the interested folks in the qgis pt user group. And
we will try to see if it's possible to target sponsor qt to unblock those
limitations in the future.

Best regards,

Em 17/12/2014 22:22, "Nyall Dawson" <nyall.dawson at gmail.com> escreveu:

> On 18 December 2014 at 01:31, Alexandre Neto <senhor.neto at gmail.com>
> wrote:
> >
> > Hello everyone,
> >
> > Does anyone know if there are any plans for implementing CMYK color mode
> in
> > QGIS?
> I did a bit of research yesterday and it looks like we're out of luck
> until the underlying Qt libraries (QPainter, QPrinter, QtSvg) gain
> support for CMYK. We could add support for selecting CMYK colours into
> the new colour picker, but currently all of the export options
> available in Qt convert colours back to RGB prior to export.
> > If there are no plans for that, can someone give me anideia of what would
> > need to be done?
> It would need to be implemented in Qt, but I can't find much
> information about whether this is planned or not. Here's a couple of
> relevant reports (with almost zero activity):
> https://bugreports.qt-project.org/browse/QTBUG-896
> https://bugreports.qt-project.org/browse/QTBUG-86
> https://bugreports.qt-project.org/browse/QTBUG-21276
> I'm also not sure if Qt has a culture of sponsored targeted
> development, or who you could get to tackle this... I'm interested to
> know any findings you have though, as there's a number of similar Qt
> limitations which really hold us back:
> https://bugreports.qt-project.org/browse/QTBUG-28636
> https://bugreports.qt-project.org/browse/QTBUG-36302
> https://bugreports.qt-project.org/browse/QTBUG-6582
> (also there's a report that I can't find right now about allowing
> editing of PDF metadata)
> Nyall
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