surface_test.py 文件源码

def todo_test_blit__SRCALPHA_to_SRCALPHA_non_zero(self): #TODO
        # " There is no unit test for blitting a SRCALPHA source with non-zero
        #   alpha to a SRCALPHA destination with non-zero alpha " LL

        w,h = size = 32,32

        s = pygame.Surface(size, pygame.SRCALPHA, 32)
        s2 = s.copy()

        s.fill((32,32,32,111))
        s2.fill((32,32,32,31))

        s.blit(s2, (0,0))

        # TODO:
        # what is the correct behaviour ?? should it blend? what algorithm?

        self.assertEquals(s.get_at((0,0)), (32,32,32,31))