Travis Oliphant wrote: > Christopher Barker wrote: >> HI all, >> >> File >> "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", >> line 2814, in SetDataBuffer >> return _core_.Image_SetDataBuffer(*args, **kwargs) >> TypeError: non-character array cannot be interpreted as character buffer >> >> If I try to pass in a numpy array, while it works great with a >> numarray array. > > This error sounds like wx is using the *wrong* buffer protocol. Don't > use bf_getcharbuffer as it is of uncertain utility. It is slated for > removal from Python 3000. It was meant to be used as a way to determine > buffers that were supposed to contain characters (not arbitrary data). > > Just use bf_getreadbuffer and bf_getwritebuffer from tp_as_buffer.
I'm using PyArg_Parse($input, "t#", ...) to get the buffer pointer and size. Is there another format specifier to use for the buffer pointer using the other slots or do I need to drop down to a lower level API to get it? I didn't realize there was a distinction between buffer and character buffer. Another read of the PyArg_Parse docs with that new fact makes things a little more clear. Looking at the code I guess "s#" will do it, I guess I thought it would try to coerce the object to a PyString like some other APIs do, which I was trying to avoid, but it doesn't appear to do that, (only encoding a unicode object if that is passed.) I think I'll take a shot at using tp_as_buffer directly to avoid any confusion in the future and avoid the arg parse overhead... Any other suggestions? BTW Chris, try using buffer(RGB) and buffer(Alpha) in your sample, I expect that will work with the current code. -- Robin Dunn Software Craftsman http://wxPython.org Java give you jitters? Relax with wxPython! ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
