skia2/resources/sksl/shared/VectorScalarMath.sksl

uniform half4 colorRed, colorGreen;
uniform half  unknownInput;

bool test_half() {
    bool ok = true;
    half4 inputRed   = colorRed;
    half4 inputGreen = colorGreen;

    // Vector op scalar
    half4 x = inputRed + 2;
    ok = ok && (x == half4(3, 2, 2, 3));
    x = inputGreen.garb - 2;
    ok = ok && (x == half4(-1, -1, -2, -2));
    x = inputRed + inputGreen.g;
    ok = ok && (x == half4(2, 1, 1, 2));
    x.xyz = inputGreen.aga * 9;
    ok = ok && (x == half4(9, 9, 9, 2));
    x.xy = x.zw / 0.5;
    ok = ok && (x == half4(18, 4, 9, 2));

    // (Vector op scalar).swizzle
    x = (inputRed * 5).yxwz;
    ok = ok && (x == half4(0, 5, 5, 0));

    // Scalar op vector
    x = 2 + inputRed;
    ok = ok && (x == half4(3, 2, 2, 3));
    x = 10 - inputGreen.garb;
    ok = ok && (x == half4(9, 9, 10, 10));
    x = inputRed.r + inputGreen;
    ok = ok && (x == half4(1, 2, 1, 2));
    x.xyz = 9 * inputGreen.aga;
    ok = ok && (x == half4(9, 9, 9, 2));
    x.xy = 36 / x.zw;
    ok = ok && (x == half4(4, 18, 9, 2));

    // (Scalar op vector).swizzle
    x = (36 / x).yxwz;
    ok = ok && (x == half4(2, 9, 18, 4));

    // X op= scalar.
    x += 2;
    x *= 2;
    x -= 4;
    x /= 2;
    ok = ok && (x == half4(2, 9, 18, 4));

    // X = X op scalar.
    x  = x + 2;
    x  = x * 2;
    x  = x - 4;
    x  = x / 2;
    ok = ok && (x == half4(2, 9, 18, 4));

    return ok;
}

bool test_int() {
    bool ok = true;
    int4 inputRed   = int4(colorRed);
    int4 inputGreen = int4(colorGreen);

    // Vector op scalar
    int4 x = inputRed + 2;
    ok = ok && (x == int4(3, 2, 2, 3));
    x = inputGreen.garb - 2;
    ok = ok && (x == int4(-1, -1, -2, -2));
    x = inputRed + inputGreen.g;
    ok = ok && (x == int4(2, 1, 1, 2));
    x.xyz = inputGreen.aga * 9;
    ok = ok && (x == int4(9, 9, 9, 2));
    x.xy = x.zw / 3;
    ok = ok && (x == int4(3, 0, 9, 2));

    // (Vector op scalar).swizzle
    x = (inputRed * 5).yxwz;
    ok = ok && (x == int4(0, 5, 5, 0));

    // Scalar op vector
    x = 2 + inputRed;
    ok = ok && (x == int4(3, 2, 2, 3));
    x = 10 - inputGreen.garb;
    ok = ok && (x == int4(9, 9, 10, 10));
    x = inputRed.r + inputGreen;
    ok = ok && (x == int4(1, 2, 1, 2));
    x.xyz = 9 * inputGreen.aga;
    ok = ok && (x == int4(9, 9, 9, 2));
    x.xy = 36 / x.zw;
    ok = ok && (x == int4(4, 18, 9, 2));

    // (Scalar op vector).swizzle
    x = (36 / x).yxwz;
    ok = ok && (x == int4(2, 9, 18, 4));

    // X op= scalar.
    x += 2;
    x *= 2;
    x -= 4;
    x /= 2;
    ok = ok && (x == int4(2, 9, 18, 4));

    // X = X op scalar.
    x  = x + 2;
    x  = x * 2;
    x  = x - 4;
    x  = x / 2;
    ok = ok && (x == int4(2, 9, 18, 4));

    return ok;
}

half4 main(float2 coords) {
    return test_half() && test_int() ? colorGreen : colorRed;
}