@arsinte_andrei said in Loading images or draw them?? witch one is faster?:
hmm... that is bed news for me... I do prefer to design things in Krita or Inkscape... but to draw them in C++... that is another story.. how can I draw a moon?? what to use to do it?? just a normal white moon-shape
It sounds like there may have been a miscommunication if you feel that you've gotten bad news. The act of taking an image loaded into memory and putting it on screen is called "painting" and you use QPainter to do it. Regardless of whether you are drawing lines and circles using the API, or copying a buffer from a pixmap that started out as a PNG image.
As for the fastest way to do it... Just start with the simplest way, and see if that's fast enough. Only worry about solving the problems you have. A Raspberry Pi is obviously a lot slower than a desktop system so you are more likely to run into performance problems there. But it makes more sense to start with a simple prototype, and profile what the slow parts are, rather than worry about things you imagine could potentially be slow and spend your time working on stuff that may not actually have been a problem.
