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import unittest
import os
import sys
import test.support
from ctypes import *
from ctypes.util import find_library
# On some systems, loading the OpenGL libraries needs the RTLD_GLOBAL mode.
class Test_OpenGL_libs(unittest.TestCase):
@classmethod
def setUpClass(cls):
lib_gl = lib_glu = lib_gle = None
if sys.platform == "win32":
lib_gl = find_library("OpenGL32")
lib_glu = find_library("Glu32")
elif sys.platform == "darwin":
lib_gl = lib_glu = find_library("OpenGL")
else:
lib_gl = find_library("GL")
lib_glu = find_library("GLU")
lib_gle = find_library("gle")
## print, for debugging
if test.support.verbose:
print("OpenGL libraries:")
for item in (("GL", lib_gl),
("GLU", lib_glu),
("gle", lib_gle)):
print("\t", item)
cls.gl = cls.glu = cls.gle = None
if lib_gl:
cls.gl = CDLL(lib_gl, mode=RTLD_GLOBAL)
if lib_glu:
cls.glu = CDLL(lib_glu, RTLD_GLOBAL)
if lib_gle:
try:
cls.gle = CDLL(lib_gle)
except OSError:
pass
def test_gl(self):
if self.gl is None:
self.skipTest('lib_gl not available')
self.gl.glClearIndex
def test_glu(self):
if self.glu is None:
self.skipTest('lib_glu not available')
self.glu.gluBeginCurve
def test_gle(self):
if self.gle is None:
self.skipTest('lib_gle not available')
self.gle.gleGetJoinStyle
# On platforms where the default shared library suffix is '.so',
# at least some libraries can be loaded as attributes of the cdll
# object, since ctypes now tries loading the lib again
# with '.so' appended of the first try fails.
#
# Won't work for libc, unfortunately. OTOH, it isn't
# needed for libc since this is already mapped into the current
# process (?)
#
# On MAC OSX, it won't work either, because dlopen() needs a full path,
# and the default suffix is either none or '.dylib'.
@unittest.skip('test disabled')
@unittest.skipUnless(os.name=="posix" and sys.platform != "darwin",
'test not suitable for this platform')
class LoadLibs(unittest.TestCase):
def test_libm(self):
import math
libm = cdll.libm
sqrt = libm.sqrt
sqrt.argtypes = (c_double,)
sqrt.restype = c_double
self.assertEqual(sqrt(2), math.sqrt(2))
if __name__ == "__main__":
unittest.main()
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