On Monday 05 May 2008 09:24:42 pm G Jones wrote:
> Hello,
> Attached is a script that when run from ipython --pylab with your
> backend setup for 'QtAgg' reproduces a bug I am seeing. If you run the
> plot, you'll see a line plotted in blue as expected. Then when the
> same figure is updated by blitting, the line turns red. I tried this
> with green and it stayed green, but yellow went to cyan. It seems that
> the byteswapping that is necessary for displaying colors correctly in
> Qt is happening during a normal plot, but not when blitting. I tried
> going through the code to determine the problem, I can only guess that
> it lies somewhere in the FigureCanvasQTAgg.paintEvent, since that's
> where I see to_ARGB etc.
> Sorry I couldn't locate the bug precisely, I find it very difficult to
> thread my way through all the backend classes.

I did track down the source of the bug a while back: 
http://sourceforge.net/mailarchive/message.php?msg_id=200803121528.30565.darren.dale%40cornell.edu

Mike D. suggested that BufferRegion might need a byte-swapped version of 
to_string(), but unfortunately I am not an experienced c programmer and am 
short of time to try to work my way through it right now. I added a bug 
report at SF.

Darren

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