[Qt-interest] fastest way to draw everchanging pixels

[Brad Howes]

On Mar 23, 2009, at 11:26 AM, Oliver.Knoll at comit.ch wrote:

> Still, I would like to give you another approach which is still  
> pixel-based and similar to your approach. But instead of callling a  
> method for (potentially) each pixel, you do your own address  
> arithmetic and calculate the pixel values. The basic idea is that  
> you first draw into a QImage which gives you direct pixel access,  
> using some easy pointer arithmetic, and then let the QPainter draw  
> this QImage (which will automatically be converted to a QPixmap for  
> fast drawing).


That was my first thought as well. I too would be interested in  
learning about any timing results people may have WRT the two  
approaches.

Brad

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Brad Howes
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