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"""
Python bindings for GLFW.
"""
from __future__ import print_function
from __future__ import division
from __future__ import unicode_literals
import ctypes
import os
import glob
import sys
import subprocess
import textwrap
def _find_library_candidates(library_names,
library_file_extensions,
library_search_paths):
"""
Finds and returns filenames which might be the library you are looking for.
"""
candidates = set()
for library_name in library_names:
for search_path in library_search_paths:
glob_query = os.path.join(search_path, '*'+library_name+'*')
for filename in glob.iglob(glob_query):
filename = os.path.realpath(filename)
if filename in candidates:
continue
basename = os.path.basename(filename)
if basename.startswith('lib'+library_name):
basename_end = basename[len('lib'+library_name):]
elif basename.startswith(library_name):
basename_end = basename[len(library_name):]
else:
continue
for file_extension in library_file_extensions:
if basename_end.startswith(file_extension):
if basename_end[len(file_extension):][:1] in ('', '.'):
candidates.add(filename)
if basename_end.endswith(file_extension):
basename_middle = basename_end[:-len(file_extension)]
if all(c in '0123456789.' for c in basename_middle):
candidates.add(filename)
return candidates
def _load_library(library_names, library_file_extensions,
library_search_paths, version_check_callback):
"""
Finds, loads and returns the most recent version of the library.
"""
candidates = _find_library_candidates(library_names,
library_file_extensions,
library_search_paths)
library_versions = []
for filename in candidates:
version = version_check_callback(filename)
if version is not None and version >= (3, 0, 0):
library_versions.append((version, filename))
if not library_versions:
return None
library_versions.sort()
return ctypes.CDLL(library_versions[-1][1])
def _glfw_get_version(filename):
"""
Queries and returns the library version tuple or None by using a
subprocess.
"""
version_checker_source = '''
import sys
import ctypes
def get_version(library_handle):
"""
Queries and returns the library version tuple or None.
"""
major_value = ctypes.c_int(0)
major = ctypes.pointer(major_value)
minor_value = ctypes.c_int(0)
minor = ctypes.pointer(minor_value)
rev_value = ctypes.c_int(0)
rev = ctypes.pointer(rev_value)
if hasattr(library_handle, 'glfwGetVersion'):
library_handle.glfwGetVersion(major, minor, rev)
version = (major_value.value,
minor_value.value,
rev_value.value)
return version
else:
return None
try:
input_func = raw_input
except NameError:
input_func = input
filename = input_func().strip()
try:
library_handle = ctypes.CDLL(filename)
except OSError:
pass
else:
version = get_version(library_handle)
print(version)
'''
args = [sys.executable, '-c', textwrap.dedent(version_checker_source)]
process = subprocess.Popen(args, universal_newlines=True,
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
out = process.communicate(filename)[0]
out = out.strip()
if out:
return eval(out)
else:
return None
def _get_library_search_paths():
"""
Returns a list of library search paths, considering of the current working
directory, default paths and paths from environment variables.
"""
package_path = os.path.abspath(os.path.dirname(__file__))
search_paths = [
'',
package_path,
sys.prefix + '/lib',
'/usr/lib64',
'/usr/local/lib64',
'/usr/lib', '/usr/local/lib',
'/opt/homebrew/lib',
'/run/current-system/sw/lib',
'/usr/lib/x86_64-linux-gnu/',
'/usr/lib/aarch64-linux-gnu/',
'/usr/lib/arm-linux-gnueabihf',
]
if sys.platform != 'darwin':
# manylinux2014 wheels contain libraries built for X11 and Wayland
if os.environ.get('XDG_SESSION_TYPE') == 'wayland':
search_paths.insert(1, os.path.join(package_path, 'wayland'))
else:
# X11 is the default, even if XDG_SESSION_TYPE is not set
search_paths.insert(1, os.path.join(package_path, 'x11'))
if sys.platform == 'darwin':
path_environment_variable = 'DYLD_LIBRARY_PATH'
else:
path_environment_variable = 'LD_LIBRARY_PATH'
if path_environment_variable in os.environ:
search_paths.extend(os.environ[path_environment_variable].split(':'))
return search_paths
if os.environ.get('PYGLFW_LIBRARY', ''):
try:
glfw = ctypes.CDLL(os.environ['PYGLFW_LIBRARY'])
except OSError:
glfw = None
elif sys.platform == 'win32':
glfw = None # Will become `not None` on success.
# try Windows default search path
try:
glfw = ctypes.CDLL('glfw3.dll')
except OSError:
pass
# try package directory
if glfw is None:
try:
if sys.maxsize > 2**32:
# load Microsoft Visual C++ 2012 runtime on 64-bit systems
msvcr = ctypes.CDLL(os.path.join(os.path.abspath(os.path.dirname(__file__)), 'msvcr110.dll'))
else:
# load Microsoft Visual C++ 2010 runtime on 32-bit systems
msvcr = ctypes.CDLL(os.path.join(os.path.abspath(os.path.dirname(__file__)), 'msvcr100.dll'))
glfw = ctypes.CDLL(os.path.join(os.path.abspath(os.path.dirname(__file__)), 'glfw3.dll'))
except OSError:
pass
# try conda's default location on Windows
if glfw is None:
try:
glfw = ctypes.CDLL(os.path.join(sys.prefix, 'Library', 'bin', 'glfw3.dll'))
except OSError:
pass
else:
glfw = _load_library(['glfw', 'glfw3'], ['.so', '.dylib'],
_get_library_search_paths(), _glfw_get_version)
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