Abstracted out library configuration into separate config module. #71
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jevans
parent
73cdb5d586
commit
a9ef89fbf0
3 changed files with 128 additions and 135 deletions
124
glymur/lib/config.py
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124
glymur/lib/config.py
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"""
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Configure glymur to use installed libraries if possible.
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"""
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import ctypes
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from ctypes.util import find_library
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import os
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import platform
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import sys
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if sys.hexversion <= 0x03000000:
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from ConfigParser import SafeConfigParser as ConfigParser
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else:
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from configparser import ConfigParser
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def glymurrc_fname():
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"""Return the path to the configuration file.
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Search order:
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1) current working directory
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2) environ var XDG_CONFIG_HOME
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3) $HOME/.config/glymur/glymurrc
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"""
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# Current directory.
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fname = os.path.join(os.getcwd(), 'glymurrc')
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if os.path.exists(fname):
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return fname
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# Either GLYMURCONFIGDIR/glymurrc or $HOME/.glymur/glymurrc
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confdir = get_configdir()
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if confdir is not None:
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fname = os.path.join(confdir, 'glymurrc')
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if os.path.exists(fname):
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return fname
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# didn't find a configuration file.
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return None
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def get_openjpeg_config():
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libopenjpeg_path = find_library('openjpeg')
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# If we could not find it, then look in some likely locations.
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if libopenjpeg_path is None:
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if platform.system() == 'Darwin':
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path = '/opt/local/lib/libopenjpeg.dylib'
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if os.path.exists(path):
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libopenjpeg_path = path
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elif os.name == 'nt':
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path = os.path.join('C:\\', 'Program files', 'OpenJPEG 1.5',
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'bin', 'openjpeg.dll')
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if os.path.exists(path):
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libopenjpeg_path = path
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try:
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if os.name == "nt":
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openjpeg_lib = ctypes.windll.LoadLibrary(libopenjpeg_path)
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else:
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openjpeg_lib = ctypes.CDLL(libopenjpeg_path)
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except OSError:
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openjpeg_lib = None
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if openjpeg_lib is not None:
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# Must be at least 1.5.0
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openjpeg_lib.opj_version.restype = ctypes.c_char_p
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v = openjpeg_lib.opj_version()
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v = v.decode('utf-8')
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major, minor, patch = v.split('.')
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if minor != '5':
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openjpeg_lib = None
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return openjpeg_lib
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def get_openjp2_config():
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filename = glymurrc_fname()
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if filename is not None:
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# Read the configuration file for the library location.
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parser = ConfigParser()
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parser.read(filename)
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libopenjp2_path = parser.get('library', 'openjp2')
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else:
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# No help from the config file, try to find it ourselves.
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libopenjp2_path = find_library('openjp2')
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if libopenjp2_path is None:
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return None
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try:
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if os.name == "nt":
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openjp2_lib = ctypes.windll.LoadLibrary(libopenjp2_path)
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else:
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openjp2_lib = ctypes.CDLL(libopenjp2_path)
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except OSError:
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msg = '"Library {0}" could not be loaded. Operating in degraded mode.'
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msg = msg.format(libopenjp2_path)
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warnings.warn(msg, UserWarning)
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openjp2_lib = None
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return openjp2_lib
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def glymur_config():
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"""Try to ascertain locations of openjp2, openjpeg libraries.
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"""
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openjp2_lib = get_openjp2_config()
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openjpeg_lib = get_openjpeg_config()
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return openjp2_lib, openjpeg_lib
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def get_configdir():
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"""Return string representing the configuration directory.
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Default is $HOME/.config/glymur. You can override this with the
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XDG_CONFIG_HOME environment variable.
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"""
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if 'XDG_CONFIG_HOME' in os.environ:
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return os.path.join(os.environ['XDG_CONFIG_HOME'], 'glymur')
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if 'HOME' in os.environ:
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return os.path.join(os.environ['HOME'], '.config', 'glymur')
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if 'USERPROFILE' in os.environ:
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# Windows?
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return os.path.join(os.environ['USERPROFILE'], 'Application Data', 'glymur')
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@ -2,134 +2,11 @@
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Wraps individual functions in openjp2 library.
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"""
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import ctypes
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import platform
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from ctypes.util import find_library
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def glymurrc_fname():
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"""Return the path to the configuration file.
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Search order:
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1) current working directory
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2) environ var XDG_CONFIG_HOME
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3) $HOME/.config/glymur/glymurrc
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"""
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# Current directory.
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fname = os.path.join(os.getcwd(), 'glymurrc')
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if os.path.exists(fname):
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return fname
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# Either GLYMURCONFIGDIR/glymurrc or $HOME/.glymur/glymurrc
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confdir = get_configdir()
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if confdir is not None:
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fname = os.path.join(confdir, 'glymurrc')
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if os.path.exists(fname):
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return fname
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# didn't find a configuration file.
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return None
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def get_openjpeg_config():
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libopenjpeg_path = find_library('openjpeg')
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# If we could not find it, then look in some likely locations.
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if libopenjpeg_path is None:
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if platform.system() == 'Darwin':
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path = '/opt/local/lib/libopenjpeg.dylib'
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if os.path.exists(path):
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libopenjpeg_path = path
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elif os.name == 'nt':
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path = os.path.join('C:\\', 'Program files', 'OpenJPEG 1.5',
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'bin', 'openjpeg.dll')
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if os.path.exists(path):
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libopenjpeg_path = path
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try:
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if os.name == "nt":
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OPENJPEG = ctypes.windll.LoadLibrary(libopenjpeg_path)
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else:
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OPENJPEG = ctypes.CDLL(libopenjpeg_path)
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except OSError:
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OPENJPEG = None
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if OPENJPEG is not None:
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# Must be at least 1.5.0
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OPENJPEG.opj_version.restype = ctypes.c_char_p
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v = OPENJPEG.opj_version()
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v = v.decode('utf-8')
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major, minor, patch = v.split('.')
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if minor != '5':
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OPENJPEG = None
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return OPENJPEG
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def get_openjp2_config():
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filename = glymurrc_fname()
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if filename is not None:
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# Read the configuration file for the library location.
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parser = ConfigParser()
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parser.read(filename)
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libopenjp2_path = parser.get('library', 'openjp2')
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else:
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# No help from the config file, try to find it ourselves.
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libopenjp2_path = find_library('openjp2')
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if libopenjp2_path is None:
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return None
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try:
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if os.name == "nt":
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OPENJP2 = ctypes.windll.LoadLibrary(libopenjp2_path)
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else:
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OPENJP2 = ctypes.CDLL(libopenjp2_path)
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except OSError:
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msg = '"Library {0}" could not be loaded. Operating in degraded mode.'
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msg = msg.format(libopenjp2_path)
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warnings.warn(msg, UserWarning)
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OPENJP2 = None
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return OPENJP2
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def config():
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"""Read configuration file.
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"""
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OPENJP2 = get_openjp2_config()
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OPENJPEG = get_openjpeg_config()
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return OPENJP2, OPENJPEG
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def get_configdir():
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"""Return string representing the configuration directory.
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Default is $HOME/.config/glymur. You can override this with the
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XDG_CONFIG_HOME environment variable.
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"""
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if 'XDG_CONFIG_HOME' in os.environ:
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return os.path.join(os.environ['XDG_CONFIG_HOME'], 'glymur')
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if 'HOME' in os.environ:
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return os.path.join(os.environ['HOME'], '.config', 'glymur')
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if 'USERPROFILE' in os.environ:
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return os.path.join(os.environ['USERPROFILE'], 'Application Data', 'glymur')
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import os
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import warnings
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import sys
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if sys.hexversion <= 0x03000000:
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from ConfigParser import SafeConfigParser as ConfigParser
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else:
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from configparser import ConfigParser
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OPENJP2, OPENJPEG = config()
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if OPENJP2 is None and OPENJPEG is None:
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wmsg = "Neither the glymur configuration file could not be located "
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wmsg += "nor could openjpeg 1.5.1 be located. Glymur can only "
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wmsg += "operate under extremely degraded conditions."
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warnings.warn(wmsg, UserWarning)
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from .config import glymur_config
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OPENJP2, OPENJPEG = glymur_config()
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# Progression order
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LRCP = 0
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@ -6,19 +6,11 @@ from ctypes.util import find_library
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import platform
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import os
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if os.name == "nt":
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path = os.path.join('C:\\', 'Program files', 'OpenJPEG 1.5',
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'bin', 'openjpeg.dll')
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OPENJPEG = ctypes.windll.LoadLibrary(path)
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else:
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if platform.system() == 'Darwin':
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OPENJPEG = ctypes.CDLL('/opt/local/lib/libopenjpeg.dylib')
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elif platform.system() == 'Linux':
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OPENJPEG = ctypes.CDLL(find_library('openjpeg'))
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from .config import glymur_config
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_, OPENJPEG = glymur_config()
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PATH_LEN = 4096 # maximum allowed size for filenames
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class event_mgr_t(ctypes.Structure):
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"""Message handler object.
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"""
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