You can draw to a temporary pixmap and only update the pixmap with the last created segment of the path. Then when the user releases the mouse, either draw the pixmap to the destination image or restroke the path directly.
The "Q"
Re: Optimizing the painting on a custom QGraphicsItem
You can draw to a temporary pixmap and only update the pixmap with the last created segment of the path. Then when the user releases the mouse, either draw the pixmap to the destination image or restroke the path directly.
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