xref: /aosp_15_r20/external/skia/resources/sksl/folding/CastFolding.rts (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)

uniform half4 colorRed, colorGreen;

bool test() {
    const float floatOne = 1;
    const int intOne = 1;
    const half4 half4One = half4(1);
    const int4 int4One = int4(1);

    bool ok = true;

    // Typecasting a constant scalar variable should fold away.
    ok = ok && (int(floatOne) == intOne);
    ok = ok && (float(intOne) == floatOne);

    // Typecasting a constant vector variable should fold away.
    ok = ok && (int4(half4One) == int4One);
    ok = ok && (half4(int4One) == half4One);

    // More complex cases should also fold.
    ok = ok && (int4(half4One) == int4(intOne));            // cast(vector) == splat(scalar)
    ok = ok && (half4(int4One) == half4(half(floatOne)));   // cast(vector) == splat(cast(scalar))
    ok = ok && (half4(intOne) == half4(float4(floatOne)));  // splatcast(sclr) == cast(splat(sclr))

    return ok;
}

half4 main(float2 coords) {
    return test() ? colorGreen : colorRed;
}