/*#pragma settings ForceHighPrecision*/
// ForceHighPrecision is set by DawnGraphicsPipeline when shader-f16 feature is not present
uniform float unknownInput;
void main() {
    half x = half(unknownInput);
    half4 y = half4(x);
    half4 z = dFdx(y); // dpdx is always high-precision, this should avoid casts now
    sk_FragColor = z;
}