mirror of
https://github.com/kovidgoyal/calibre.git
synced 2026-01-27 14:17:07 -05:00
67 lines
2.4 KiB
Python
67 lines
2.4 KiB
Python
## Copyright (C) 2007 Kovid Goyal kovid@kovidgoyal.net
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License along
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## with this program; if not, write to the Free Software Foundation, Inc.,
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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import ctypes, os, sys
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from libprs500 import iswindows, isosx
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class WandException(Exception):
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pass
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_lib_name = 'CORE_RL_wand_.dll' if iswindows else 'libWand.dylib' if isosx else 'libWand.so'
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if iswindows and hasattr(sys, 'frozen'):
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im_dir = os.path.join(os.path.dirname(sys.executable), 'ImageMagick')
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os.putenv('PATH', im_dir + ';' + os.environ['PATH'])
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_libwand = None
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try:
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_libwand = ctypes.cdll.LoadLibrary(_lib_name)
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except:
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pass
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class Severity(ctypes.c_long):
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pass
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class String(ctypes.c_char_p):
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def __del__(self):
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_libwand.MagickRelinquishMemory(self)
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def __str__(self):
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return self.value
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if _libwand is not None:
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_libwand.MagickGetException.argtypes = [ctypes.c_void_p, ctypes.POINTER(Severity)]
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_libwand.MagickGetException.restype = String
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def get_exception(wand):
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severity = Severity()
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desc = _libwand.MagickGetException(wand, ctypes.byref(severity))
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return str(desc)
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def convert(source, dest):
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if _libwand is None:
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raise WandException('Could not find ImageMagick library')
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if not _libwand.MagickWandGenesis():
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raise WandException('Unable to initialize Image Magick')
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wand = _libwand.NewMagickWand()
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if wand <= 0:
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raise WandException('Unable to initialize Image Magick. Cannot create wand.')
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if not _libwand.MagickReadImage(wand, source):
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raise WandException('Cannot read image %s: %s'%(source, get_exception(wand)))
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if not _libwand.MagickWriteImage(wand, dest):
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raise WandException('Cannot write image to file %s: %s'%(source, get_exception(wand)))
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_libwand.DestroyMagickWand(wand)
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_libwand.MagickWandTerminus() |