third_party/skia/resources/sksl/shared/SwizzleScalarBool.sksl

uniform half unknownInput; // 1

half4 main(float2 coords) {
    bool b = bool(unknownInput);
    bool4 b4 = b.xxxx;
    b4 = b.xx01;
    b4 = b.0x10;
    b4 = b.0x0x;

    return half4(b4);
}