Re: wx_4.0.0a1 : demo->PDFViewer

The version of wx/lib/pdfviewer/viewer.py in wxPython-4.0.0a1 was tested 
using PyMuPDF 1.92 and Python 3.4 on both Windows 10 and OS X in July 2016. 
The Windows machine has since been rebuilt with the March 2017 release of 
Windows 10 and has Python 3.6. I have just installed the pre-built Windows 
version of PyMuPDF 1.10.0.0 there from 
https://github.com/JorjMcKie/PyMuPDF-optional-material which has the 
associated comment "Defaulting alpha=True b/o backward compatibility" and 
the pdf viewer works fine with it. On the line you refer to, in the call to 
wx.Bitmap.FromBufferRGBA(pix.width, pix.height, pix.samples) the len of 
pix.samples is width * height * 4.

Maybe your version of PyMuPDF is not compatible with the MuPDF you have 
built. The dialogue going on at https://github.com/rk700/PyMuPDF/issues/90 
might be relevant.

Regards
David Hughes


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