NaturalHistoryMuseum/zbar-python-patched

Name: zbar-python-patched

Owner: Natural History Museum

Description: Python wrapper for ZBar bar code library, patched for OS X, and with a wheel for 32-bit Python on Windows

Created: 2016-01-14 07:56:07.0

Updated: 2016-09-27 22:21:54.0

Pushed: 2016-01-14 19:47:25.0

Homepage:

Size: 39

Language: C

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README

ZBar

ZBar is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports many popular symbologies (types of bar codes) including EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 and QR Code.

The purpose of this repository

This repository is forked from the ZBar python wrapper download at PyPI, and only contains the python wrapper for the C library. For the full C library source, installation directions, etc., check out the ZBar homepage.

The Natural History Museum's fork adds a wheel build for Windows 32-bit.

Fixes implemented

Patches imagescanner.c to fix crashing (segmentation fault 11) issues with import zbar on OS X.

Patch taken from http://launchpadlibrarian.net/134768014/zbar_0.10+doc-7build3_0.10+doc-8.diff.gz.

Installing on Mac OS X

• Install zbar using homebrew:

   install zbar
  

• Install the extension module

  install https://github.com/NaturalHistoryMuseum/zbar-python-patched/archive/v0.10.tar.gz
  

Installing on Windows 32-bit

Install a release from this repo, e.g.:

install https://github.com/NaturalHistoryMuseum/zbar-python-patched/releases/download/v0.10/zbar-0.10-cp27-none-win_win32.whl

Building for Windows 32-bit

You should only need to build if you want to release a new version.

• Download and install Miniconda-latest-Windows-x86.exe.

• Download MinGW, install to C:\MinGW, and run

  inGW\bin\mingw-get.exe install gcc
  

• Create libpython27.a from python27.dll, for the benefit of the MinGW linker

  Following this advice.

  inGW\bin\mingw-get install pexports
  /F %a IN ('python -c "import sys; print(sys.exec_prefix)"') DO cd %a
  inGW\bin\pexports.exe python27.dll > python27.def
  inGW\bin\dlltool --dllname python27.dll --def python27.def --output-lib libs\libpython27.a
  

• Download zbar-0.10-setup.exe and install to c:\zbar

• Build the zbar Python extension module and a wheel

  where you cloned this repo>
  PATH=c:\MinGW\bin;%PATH%
  INCLUDE=C:\ZBar\include;%INCLUDE%
  LIB=C:\ZBar\lib;%LIB%
  LIBPATH=C:\ZBar\lib;%LIBPATH%
  PATH=c:\MinGW\bin;%PATH%
  d.bat
  

The dist directory will contain a wheel.