import unittest
import os.path
import sys
from test import test_support
from ctypes import *
from ctypes.util import find_library
from ctypes.test import is_resource_enabled

if sys.platform == "win32":
    lib_gl = find_library("OpenGL32")
    lib_glu = find_library("Glu32")
    lib_gle = None
elif sys.platform == "darwin":
    lib_gl = lib_glu = find_library("OpenGL")
    lib_gle = None
else:
    lib_gl = find_library("GL")
    lib_glu = find_library("GLU")
    lib_gle = find_library("gle")

## print, for debugging
if is_resource_enabled("printing"):
    if lib_gl or lib_glu or lib_gle:
        print "OpenGL libraries:"
        for item in (("GL", lib_gl),
                     ("GLU", lib_glu),
                     ("gle", lib_gle)):
            print "\t", item


# On some systems, loading the OpenGL libraries needs the RTLD_GLOBAL mode.
class Test_OpenGL_libs(unittest.TestCase):
    def setUp(self):
        self.gl = self.glu = self.gle = None
        if lib_gl:
            try:
                self.gl = CDLL(lib_gl, mode=RTLD_GLOBAL)
            except OSError:
                pass
        if lib_glu:
            try:
                self.glu = CDLL(lib_glu, RTLD_GLOBAL)
            except OSError:
                pass
        if lib_gle:
            try:
                self.gle = CDLL(lib_gle)
            except OSError:
                pass

    def tearDown(self):
        self.gl = self.glu = self.gle = None

    @unittest.skipUnless(lib_gl, 'lib_gl not available')
    def test_gl(self):
        if self.gl:
            self.gl.glClearIndex

    @unittest.skipUnless(lib_glu, 'lib_glu not available')
    def test_glu(self):
        if self.glu:
            self.glu.gluBeginCurve

    @unittest.skipUnless(lib_gle, 'lib_gle not available')
    def test_gle(self):
        if self.gle:
            self.gle.gleGetJoinStyle

    def test_shell_injection(self):
        result = find_library('; echo Hello shell > ' + test_support.TESTFN)
        self.assertFalse(os.path.lexists(test_support.TESTFN))
        self.assertIsNone(result)

if __name__ == "__main__":
    unittest.main()