Hello everyone,

I just committed some accelerator-related updates to the WXAgg  
backend.  I have fixed the problem with the way I was calling the  
wxBitmap constructor in _wxagg.src.  More importantly, I written  
another set of the agg-to-wx.Bitmap conversion routines that uses the  
new BitmapFromBufferRGBA() function in wxPython 2.8.  The blit()  
routine also got a bit faster after I realized it was more efficient  
to just convert the whole buffer and blit part of it instead of  
clipping during conversion.

I have tested these changes with wxPython 2.8.1.1 under OSX 10.4.8.   
My goal is that none of the changes break compatibility with wxPython  
2.4 or 2.6.  I'd really appreciate it if someone could test and  
benchmark those versions using `examples/animation_blit_wx.py'.

Ken

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