1uniform float unknownInput; 2 3void main() { 4 half value = 0.0; 5 switch (0) { 6 case 0: 7 value = 0.0; 8 if (unknownInput == 2) { 9 sk_FragColor = value.xxxx; 10 break; 11 } 12 case 1: 13 value = 1.0; 14 } 15} 16