/Lib/plat-irix5/torgb.py
http://unladen-swallow.googlecode.com/ · Python · 102 lines · 82 code · 13 blank · 7 comment · 20 complexity · 1f4b6b241108e304d4abb10cad21bdcc MD5 · raw file
- # Convert "arbitrary" image files to rgb files (SGI's image format).
- # Input may be compressed.
- # The uncompressed file type may be PBM, PGM, PPM, GIF, TIFF, or Sun raster.
- # An exception is raised if the file is not of a recognized type.
- # Returned filename is either the input filename or a temporary filename;
- # in the latter case the caller must ensure that it is removed.
- # Other temporary files used are removed by the function.
- from warnings import warnpy3k
- warnpy3k("the torgb module has been removed in Python 3.0", stacklevel=2)
- del warnpy3k
- import os
- import tempfile
- import pipes
- import imghdr
- table = {}
- t = pipes.Template()
- t.append('fromppm $IN $OUT', 'ff')
- table['ppm'] = t
- t = pipes.Template()
- t.append('(PATH=$PATH:/ufs/guido/bin/sgi; exec pnmtoppm)', '--')
- t.append('fromppm $IN $OUT', 'ff')
- table['pnm'] = t
- table['pgm'] = t
- table['pbm'] = t
- t = pipes.Template()
- t.append('fromgif $IN $OUT', 'ff')
- table['gif'] = t
- t = pipes.Template()
- t.append('tifftopnm', '--')
- t.append('(PATH=$PATH:/ufs/guido/bin/sgi; exec pnmtoppm)', '--')
- t.append('fromppm $IN $OUT', 'ff')
- table['tiff'] = t
- t = pipes.Template()
- t.append('rasttopnm', '--')
- t.append('(PATH=$PATH:/ufs/guido/bin/sgi; exec pnmtoppm)', '--')
- t.append('fromppm $IN $OUT', 'ff')
- table['rast'] = t
- t = pipes.Template()
- t.append('djpeg', '--')
- t.append('(PATH=$PATH:/ufs/guido/bin/sgi; exec pnmtoppm)', '--')
- t.append('fromppm $IN $OUT', 'ff')
- table['jpeg'] = t
- uncompress = pipes.Template()
- uncompress.append('uncompress', '--')
- class error(Exception):
- pass
- def torgb(filename):
- temps = []
- ret = None
- try:
- ret = _torgb(filename, temps)
- finally:
- for temp in temps[:]:
- if temp != ret:
- try:
- os.unlink(temp)
- except os.error:
- pass
- temps.remove(temp)
- return ret
- def _torgb(filename, temps):
- if filename[-2:] == '.Z':
- (fd, fname) = tempfile.mkstemp()
- os.close(fd)
- temps.append(fname)
- sts = uncompress.copy(filename, fname)
- if sts:
- raise error, filename + ': uncompress failed'
- else:
- fname = filename
- try:
- ftype = imghdr.what(fname)
- except IOError, msg:
- if type(msg) == type(()) and len(msg) == 2 and \
- type(msg[0]) == type(0) and type(msg[1]) == type(''):
- msg = msg[1]
- if type(msg) is not type(''):
- msg = repr(msg)
- raise error, filename + ': ' + msg
- if ftype == 'rgb':
- return fname
- if ftype is None or not table.has_key(ftype):
- raise error, '%s: unsupported image file type %r' % (filename, ftype)
- (fd, temp) = tempfile.mkstemp()
- os.close(fd)
- sts = table[ftype].copy(fname, temp)
- if sts:
- raise error, filename + ': conversion to rgb failed'
- return temp