[Image-SIG] Natty: Python Imaging Library in a virtualenv - no JPEG or PNG support

[George V. Reilly]

I'm unable to build PIL with JPEG and PNG support in Ubuntu 11.04. I
posted this to http://ubuntuforums.org/showthread.php?t=1751455 on
Friday but have received no responses.

We build our Python webservices in a virtualenv with all external
packages stored locally. This gives us reproducible results on a
variety of Linux distros, Mac, and Windows, both for developer
machines and production boxes.

Here's a repro case in a clean virtual machine.

$ sudo apt-get install python-virtualenv
$ virtualenv --no-site-packages ~/venv
$ source ~/venv/bin/activate

$ mkdir -p ~/PIL ~/temp/site-packages
$ export PYTHONPATH=~/temp/site-packages/
$ cd ~/PIL
$ wget http://effbot.org/downloads/Imaging-1.1.7.tar.gz

$ sudo apt-get build-dep python-imaging
# sets up zlib1g-dev, libfreetype6-dev, libjpeg62-dev, liblcms1-dev, ...

$ easy_install -v --install-dir ~/temp/site-packages --find-links ~/PIL\
  --allow-hosts=None --always-unzip Imaging

...
--------------------------------------------------------------------
PIL 1.1.7 SETUP SUMMARY
--------------------------------------------------------------------
version       1.1.7
platform      linux2 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24)
              [GCC 4.5.2]
--------------------------------------------------------------------
--- TKINTER support available
*** JPEG support not available
*** ZLIB (PNG/ZIP) support not available
*** FREETYPE2 support not available
--- LITTLECMS support available
--------------------------------------------------------------------

$ identify basketball.png flowers.jpg logo.gif
basketball.png PNG 340x340 340x340+0+0 8-bit DirectClass 157KB 0.000u 0:00.000
flowers.jpg[1] JPEG 500x333 500x333+0+0 8-bit DirectClass 66.5KB 0.020u 0:00.019
logo.gif[2] GIF 276x110 276x110+0+0 8-bit PseudoClass 256c 8.56KB
0.000u 0:00.000

$ python
Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24)
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import Image
>>> img = Image.open('basketball.png')
>>> img.load()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/georger/temp/site-packages/PIL-1.1.7-py2.7-linux-i686.egg/ImageFile.py",
line 189, in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/home/georger/temp/site-packages/PIL-1.1.7-py2.7-linux-i686.egg/Image.py",
line 385, in _getdecoder
    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder zip not available
>>> img = Image.open('flowers.jpg')
>>> img.load()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/georger/temp/site-packages/PIL-1.1.7-py2.7-linux-i686.egg/ImageFile.py",
line 189, in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/home/georger/temp/site-packages/PIL-1.1.7-py2.7-linux-i686.egg/Image.py",
line 385, in _getdecoder
    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available

Ideas?
--
/George V. Reilly  george at reilly.org  Twitter: @georgevreilly
http://www.georgevreilly.com/blog  http://blogs.cozi.com/tech