How To Render A Part Of QGraphicsScene And Save It As Image File PyQt5

Suppose I have QGraphicsPixmapItem from loaded image which is added to QGraphicsScene. And suppose I'll add several QGraphicsPolygonItem's on scene. How I can render a part of the

Solution 1:

Untested, but using QGraphicsScene::render you should be able to do something like...

def _save_image(self):

    # Get region of scene to capture from somewhere.
    area = get_QRect_to_capture_from_somewhere()

    # Create a QImage to render to and fix up a QPainter for it.
    image = QImage(area.size(), QImage.Format_ARGB32_Premultiplied)
    painter = QPainter(image)

    # Render the region of interest to the QImage.
    self.scene.render(painter, image.rect(), area)
    painter.end()

    # Save the image to a file.
    image.save("capture.png")

Solution 2:

I wanted to add that render requires the QRectF object for the image.area() and area parameters, otherwise it throws a TypeError.

I did:

QtCore.QRectF(image.rect()) 

and created a QRectF object for the area parameter.