Thanks to Armin and Maciej. I will try to build a OpenCV-PyPy prototype with cffi first.
Regards, Sun 2015-06-21 19:04 GMT+08:00 Armin Rigo <ar...@tunes.org>: > Hi Boxiang, > > On 21 June 2015 at 01:33, Boxiang Sun <daetalu...@gmail.com> wrote: > > Does it mean if wrap OpenCV in PyPy > > with cffi. OpenCV-PyPy could not use ndarray? > > I don't know OpenCV myself, but writing a CFFI module accessing it > should be easy, even if there are functions that take numpy arrays. > You can do: > > ffi.from_buffer(some_ndarray) > > which returns a ffi ``char *`` pointer, pointing to the data from the > ndarray. You can pass this raw pointer to C functions from OpenCV. > There is no copy of the data; if the C function modifies the data, it > will be modified in the numpy array too. > > > A bientôt, > > Armin. >
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