I plot a graph with high amount of data points connected with lines on embedded device(DART-6UL). Problem is that zooming and dragging is unacceptably slow. Cpu does not have hardware graphic acceleration so no OpenGL support. As a solution i thought about caching plot pixmap.
Is it possible to plot graph on e.g. 10 times bigger pixmap than display size cache it with QPixmapCache Class and show cached graph to increase zooming and dragging performance?