1 2out vec4 sk_FragColor; 3uniform float unknownInput; 4vec4 main() { 5 vec4 color = vec4(0.0); 6 if (unknownInput == 1.0) color.y = 1.0; 7 if (unknownInput == 2.0) ; else color.w = 1.0; 8 return color; 9} 10