uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    bool ok = true;
    ok = ok && (half4(int4(0, 0, 1, 2)) == half4(int4(half4(0.01, 0.99, 1.49, 2.75))));
    ok = ok && (half4(int4(0, 0, -1, -2)) == half4(int4(half4(-0.01, -0.99, -1.49, -2.75))));

    return ok ? colorGreen : colorRed;
}