1uniform half unknownInput; // 1 2 3half4 main(float2 coords) { 4 bool b = bool(unknownInput); 5 bool4 b4 = b.xxxx; 6 b4 = b.xx01; 7 b4 = b.0x10; 8 b4 = b.0x0x; 9 10 return half4(b4); 11} 12