Hi Boxiang,
On 21 June 2015 at 01:33, Boxiang Sun <[email protected]> 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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