CODEWITHSUNDEEP
c++qtoff-screen
SPlatten
SPlatten

Reputation: 5760

Qt create offscreen image then copy parts to onscreen?

I'm using Qt5.5, I want to create an offscreen image then copy specific parts of the offscreen image back to onscreen (visible) area.

Can anyone point me to a good example on how to create an offscreen image of a specific size, draw something on it, then copy a specific part of it (rectangle) from the offscreen image to the visible area.

Upvotes: 0

Views: 662

Answers (1)

Morix Dev
Morix Dev

Reputation: 2724

I think you can create a QPixmap and then draw your image using a QPainter built on it...

Something like:

  QPixmap pix(500,500);    
  QPainter paint(&pix);
  paint.setPen(QPen(QColor(255,34,255,255)));
  paint.drawRect(15,15,100,100);

Then, you can draw a QPixmap on the screen as usual (in QML or Widget-based application).

Upvotes: 1

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