[Interest] QDatastream, QMap, QImage serialization

[Christoph Feck]

On 21.05.2018 16:36, Murphy, Sean wrote:
>>> Why is QImage even a GUI type?
>>
>> "Has pixels" is the simplest defintiion of GUI.
>
> As a counter to that: QImage be safely used outside of the GUI thread which
> is not true for most classes that are considered GUI classes...

But doesn't QImage need PNG to serialize data? I wouldn't want a libpng 
dependency in command line applications.

Maybe for Qt6 we could have a thin QtGuiCore library, which manipulates 
image data and colors, but does not have a dependency on GUI servers 
(OpenGL, X11, etc.)