[wxPython-users] using wxImage in C++ python extension

[Christopher Barker]

Robin Dunn wrote:
> OTOH, if you don't mind an extra data copy then your extension could 
> just provide the image data as a string or RGB bytes and then you can 
> create the wx.Image from Python using that string and the 
> wx.ImageFromData constructor.

Why does that have to create a copy? It looks like the C++ 
wx.ImageSetData() method is expecting a pointer to the data. Couldn't 
the wxPython version pass the pointer through from the buffer object? Or 
better yet, from a nd-array (from the numpy array protocol).

I partly ask this because there is a thread on the matplotlib list about 
how to make the wx back-end pure Python, rather than having them depend 
on the right wx-devel stuff being installed, and after building, being 
as version specific as they are. Being able to pass data into a wxImage 
(or better yet, a wxBitmap) without copying would be a great help.

-Chris







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Christopher Barker, Ph.D.
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