Attachment 838889 Details for Bug 1044939 – steps to reproduce, and to patch the problem

steps to reproduce, and to patch the problem

Pb_python-pillow.txt (text/plain), 3.88 KB, created by a.thiaville on 2013-12-19 09:28:29 UTC

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Creator: a.thiaville

Created: 2013-12-19 09:28:29 UTC

Size: 3.88 KB

patch

obsolete

># python code to reproduce :
>from PIL import Image
>i = Image.open("/home/Alain/digik/rx100/DSC00003.JPEG") # ANY JPEG file
>i.load() # IOError 
>
>############## end python code to reproduce ###############################################################
>
># direct import (outside of Image.py)
>[Alain@alix ~]$ python
>Python 2.7.5 (default, Nov 12 2013, 16:18:42) 
>[GCC 4.8.2 20131017 (Red Hat 4.8.2-1)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>> import _imaging as core
>>>> dir(core)
>['DEFAULT_STRATEGY', 'FILTERED', 'FIXED', 'HUFFMAN_ONLY', 'RLE', '__doc__', '__file__', '__name__', '__package__', 'alpha_composite', 'bit_decoder', 'blend', 'convert', 'copy', 'crc32', 'draw', 'effect_mandelbrot', 'effect_noise', 'eps_encoder', 'fill', 'fli_decoder', 'font', 'getcodecstatus', 'getcount', 'gif_decoder', 'gif_encoder', 'group3_decoder', 'group3_encoder', 'group4_decoder', 'group4_encoder', 'hex_decoder', 'hex_encoder', 'jpeg_decoder', 'jpeg_encoder', 'jpeglib_version', 'linear_gradient', 'map_buffer', 'msp_decoder', 'new', 'open_ppm', 'outline', 'packbits_decoder', 'path', 'pcd_decoder', 'pcx_decoder', 'pcx_encoder', 'radial_gradient', 'raw_decoder', 'raw_encoder', 'sun_rle_decoder', 'tga_rle_decoder', 'tiff_ccitt_decoder', 'tiff_ccitt_encoder', 'tiff_lzw_decoder', 'tiff_raw_16_decoder', 'tiff_raw_16_encoder', 'wedge', 'xbm_decoder', 'xbm_encoder', 'zip_decoder', 'zip_encoder', 'zlib_version']
>>>> 
>## IT'S OK : the jpeg attribute/methods are accessible : jpeg_decoder, jpeg_encoder, jpeglib_version
>############# end direct import _imaging outside Image.py #####################################################
>
># same code in pdb session: 
>[Alain@alix ~]$ python pyima.py
>> /home/Alain/pyima.py(2)<module>()
>-> from PIL import Image
>(Pdb) b /usr/lib64/python2.7/site-packages/PIL/Image.py:56
>Breakpoint 1 at /usr/lib64/python2.7/site-packages/PIL/Image.py:56
>(Pdb) c
>> /usr/lib64/python2.7/site-packages/PIL/Image.py(56)<module>()
>-> import _imaging as core
>(Pdb) s
>> /usr/lib64/python2.7/site-packages/PIL/Image.py(69)<module>()
>-> try:
>(Pdb) w
>  /home/Alain/pyima.py(2)<module>()
>-> from PIL import Image
>> /usr/lib64/python2.7/site-packages/PIL/Image.py(69)<module>()
>-> try:
>(Pdb) dir(core)
>['DEFAULT_STRATEGY', 'FILTERED', 'FIXED', 'HUFFMAN_ONLY', 'PILLOW_VERSION', 'RLE', '__doc__', '__file__', '__name__', '__package__', 'alpha_composite', 'bit_decoder', 'blend', 'convert', 'copy', 'crc32', 'draw', 'effect_mandelbrot', 'effect_noise', 'eps_encoder', 'fill', 'fli_decoder', 'font', 'getcodecstatus', 'getcount', 'gif_decoder', 'gif_encoder', 'hex_decoder', 'hex_encoder', 'linear_gradient', 'map_buffer', 'msp_decoder', 'new', 'open_ppm', 'outline', 'packbits_decoder', 'path', 'pcd_decoder', 'pcx_decoder', 'pcx_encoder', 'radial_gradient', 'raw_decoder', 'raw_encoder', 'sun_rle_decoder', 'tga_rle_decoder', 'tiff_lzw_decoder', 'wedge', 'xbm_decoder', 'xbm_encoder', 'zip_decoder', 'zip_encoder', 'zlib_version']
>(Pdb) c
>Traceback (most recent call last):
>  File "pyima.py", line 4, in <module>
>    i.load()
>  File "/usr/lib64/python2.7/site-packages/PIL/ImageFile.py", line 192, in load
>    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
>  File "/usr/lib64/python2.7/site-packages/PIL/Image.py", line 381, in _getdecoder
>    raise IOError("decoder %s not available" % decoder_name)
>IOError: decoder jpeg not available
>#####  !!! BAD =>  JPEG attribute/methods ABSENT (cf dir(core)) !!!!
>
>##### TO PATCH the PROBLEM :
>[Alain@alix ~]$ cat pyima-patch.py
>from PIL import Image
>i = Image.open("/home/Alain/digik/rx100/DSC00003.JPEG")
># patch begins                                                                                                       import _imaging                                                                                                      Image.core = _imaging    # !!! overwrite Image.core for missing JPEG
># patch ends
>i.load()
>#  END OF ATTACHMENT Pb_python-pillow.txt
>

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