out vec4 sk_FragColor; uniform vec4 inputVal; uniform vec4 expected; uniform vec4 colorGreen; uniform vec4 colorRed; vec4 main() { return ((((((log(inputVal.x) == expected.x && log(inputVal.xy) == expected.xy) && log(inputVal.xyz) == expected.xyz) && log(inputVal) == expected) && 0.0 == expected.x) && vec2(0.0, 0.0) == expected.xy) && vec3(0.0, 0.0, 0.0) == expected.xyz) && vec4(0.0, 0.0, 0.0, 0.0) == expected ? colorGreen : colorRed; }