[wxPython-users] speed up display of image data from 3rd party C++ extension

[Christopher Barker]

F. Oliver Gathmann wrote:
> I would like to speed up the process of getting image data from my
> custom C++ image processing extension into my wxPython image viewer
> widget. So far, I have been taking the rather cumbersome route
> 
> C++ image -> Python string -> wx.Image -> wx.Bitmap
> 
> which is then blitted to the screen, but I would rather do
> 
> C++ image -> wx.Bitmap
> 
> directly using code similar to the recently added BitmapFromBuffer
> functions. Does this make sense?

It sure does -- that's what it's there for.

> And if it does - I would much rather
> use the wxPython API from within my extension than the other way around,

I'm not sure I quite follow this -- are you saying you want to create a 
wxBitmap in your C++ code? I can't help with that, but...

If you make your "C++ Image" follow the Python buffer protocol:

http://docs.python.org/api/abstract-buffer.html

then you should be able to do the wx.BitmapFromBuffer call in Python.

You might also want to consider taking a look at the numpy array 
interface/ndarray object spec. It could be handy to make your Images 
manipulatable with numpy anyway.

I wish I could help more, but please do report back how it works out for 
you, and how you did it.

-Chris

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Christopher Barker, Ph.D.
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