}

		// Check that the actual results equal the expected results.
		if !c.r0.Eq(r) {
			t.Errorf("%s: clip rectangle want %v got %v", c.desc, c.r0, r)
			continue
		}
		if !c.sp0.Eq(sp) {
			t.Errorf("%s: sp want %v got %v", c.desc, c.sp0, sp)
			continue
		}
		if !c.nilMask {
			if !c.mp0.Eq(mp) {
				t.Errorf("%s: mp want %v got %v", c.desc, c.mp0, mp)
				continue
			}
		}