surface_test.py 文件源码

def test_blend_rgba(self):
        bitsizes = [16, 32]
        blends = ['BLEND_RGBA_ADD',
                  'BLEND_RGBA_SUB',
                  'BLEND_RGBA_MULT',
                  'BLEND_RGBA_MIN',
                  'BLEND_RGBA_MAX']
        for bitsize in bitsizes:
            surf = self._make_surface(bitsize, srcalpha=True)
            comp = self._make_surface(bitsize, srcalpha=True)
            for blend in blends:
                self._fill_surface(surf)
                self._fill_surface(comp)
                comp.blit(surf, (3, 0),
                          special_flags=getattr(pygame, blend))
                surf.blit(surf, (3, 0),
                          special_flags=getattr(pygame, blend))
                self._assert_same(surf, comp)