mx_image_vector4.osl

#include "$fileTransformUv"

void mx_image_vector4(string file, string layer, vector4 default_value, vector2 texcoord, string uaddressmode, string vaddressmode, string filtertype, string framerange, int frameoffset, string frameendaction, output vector4 out)
{
    if (file == "" ||
        (uaddressmode == "constant" && (texcoord.x<0.0 || texcoord.x>1.0)) ||
        (vaddressmode == "constant" && (texcoord.y<0.0 || texcoord.y>1.0)))
    {
        out = default_value;
        return;
    }

    color missingColor = color(default_value.x, default_value.y, default_value.z);
    float missingAlpha = default_value.w;
    vector2 st = mx_transform_uv(texcoord);
    float alpha;
    color rgb = texture(file, st.x, st.y, "alpha", alpha, "subimage", layer,
                        "missingcolor", missingColor, "missingalpha", missingAlpha, "swrap", uaddressmode, "twrap", vaddressmode);

    out = vector4(rgb[0], rgb[1], rgb[2], alpha);
}