Why is QImage even a GUI type? 99% of what I do with QImage is not for GUI. I can understand that QPixmap is GUI, but to me QImage is i/o and pixel/metadata manipulation (using scanline() where appropriate) . Yes, occasionally I use a QPainter on one, but that does not beed to be bound to a windowing system. A non-GUI raster painter would be sufficient.
I (Qt?) uses QPixmap whenever it has to display an image. > Sent: Sunday, May 20, 2018 at 11:54 AM > From: "Thiago Macieira" <thiago.macie...@intel.com> > To: interest@qt-project.org > Subject: Re: [Interest] QDatastream, QMap, QImage serialization > > On Sunday, 20 May 2018 07:26:47 -03 Konstantin Shegunov wrote: > > On Thu, May 17, 2018 at 5:58 PM, Thiago Macieira <thiago.macie...@intel.com> > > wrote: > > > On Thursday, 17 May 2018 05:01:18 PDT Jean-Michaël Celerier wrote: > > > > Is there a reason why calling qRegisterStreamOperators<QImage>() would't > > > > work ? > > > > > > Because the vector containng the list of function pointers doesn't exist > > > for > > > metatypes < QMetaType::User. > > > > Is this by design, or just an unfortunate legacy? > > It's by design that the vector starts at QMetaType::User. > > > I would've expected > > (obviously wrongly) that the core classes provide and support all the > > functionalities of properly registered custom types. > > Except where it was too hard and we haven't done it. Serialisation appears to > be one such case. > > > And a follow up question: I'm not intimate with the internals, so is it > > feasible to actually bring this to consistency and have the stream > > operators registered in the meta-type system for the core classes? > > Yes. Patch accepted. See qguivariant.cpp: the two save and load functions are > currently null pointers. Replace with actual functions that save QtGui types > to a QDataStream and properly loaded back. > > -- > Thiago Macieira - thiago.macieira (AT) intel.com > Software Architect - Intel Open Source Technology Center > > > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
