surface_test.py 文件源码

def test_fill_negative_coordinates(self):

        # negative coordinates should be clipped by fill, and not draw outside the surface.
        color = (25, 25, 25, 25)
        color2 = (20, 20, 20, 25)
        fill_rect = pygame.Rect(-10, -10, 16, 16)

        s1 = pygame.Surface((32,32), pygame.SRCALPHA, 32)
        r1 = s1.fill(color, fill_rect)
        c = s1.get_at((0,0))
        self.assertEqual(c, color)

        # make subsurface in the middle to test it doesn't over write.
        s2 = s1.subsurface((5, 5, 5, 5))
        r2 = s2.fill(color2, (-3, -3, 5, 5))
        c2 = s1.get_at((4,4))
        self.assertEqual(c, color)

        # rect returns the area we actually fill.
        r3 = s2.fill(color2, (-30, -30, 5, 5))
        # since we are using negative coords, it should be an zero sized rect.
        self.assertEqual(tuple(r3), (0, 0, 0, 0))