surface_test.py 文件源码

def test_image_convert_bug_131(self):
        # Bitbucket bug #131: Unable to Surface.convert(32) some 1-bit images.
        # https://bitbucket.org/pygame/pygame/issue/131/unable-to-surfaceconvert-32-some-1-bit

        # Skip test_image_convert_bug_131 for headless tests.
        if os.environ.get('SDL_VIDEODRIVER') == 'dummy':
            return

        pygame.display.init()
        pygame.display.set_mode((640,480))

        im  = pygame.image.load(example_path(os.path.join("data", "city.png")))
        im2 = pygame.image.load(example_path(os.path.join("data", "brick.png")))

        self.assertEquals( im.get_palette(),  ((0, 0, 0, 255), (255, 255, 255, 255)) )
        self.assertEquals( im2.get_palette(), ((0, 0, 0, 255), (0, 0, 0, 255)) )

        self.assertEqual(repr(im.convert(32)),  '<Surface(24x24x32 SW)>')
        self.assertEqual(repr(im2.convert(32)), '<Surface(469x137x32 SW)>')

        # Ensure a palette format to palette format works.
        im3 = im.convert(8)
        self.assertEqual(repr(im3), '<Surface(24x24x8 SW)>')
        self.assertEqual(im3.get_palette(), im.get_palette())

        # It is still an error when the target format really does have
        # an empty palette (all the entries are black).
        self.assertRaises(pygame.error, im2.convert, 8)
        self.assertEqual(pygame.get_error(), "Empty destination palette")