[PyQt] QImage, transparent.

[Grzegorz Adam Hankiewicz]

El 19/01/2009, a las 21:20, Matt Smith escribió:

> I want to be able to draw lines on an image, without modifying the
> image.  More specifically I want two images one with the lines and  
> then
> the original image below it.  Can somebody recommend some classes,
> preferable I would like to use 2 QImages, but I don't know if I can
> display one on top of the other.


You can draw a QImage on top of another with QPainter if it has alpha  
channel. But anyway you will be drawing on one of them, so possibly  
you need to create a third one with the result of the combination, if  
you want to keep the two other intact.