mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
100 lines
2.4 KiB
Python
Executable file
100 lines
2.4 KiB
Python
Executable 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.
|
|
|
|
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 = `msg`
|
|
raise error, filename + ': ' + msg
|
|
if ftype == 'rgb':
|
|
return fname
|
|
if ftype is None or not table.has_key(ftype):
|
|
raise error, \
|
|
filename + ': unsupported image file type ' + `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
|