Function HPDF_LoadRawImageFromFile 

pub unsafe extern "C" fn HPDF_LoadRawImageFromFile(
    pdf: HPDF_Doc,
    filename: *const c_char,
    width: HPDF_UINT,
    height: HPDF_UINT,
    color_space: HPDF_ColorSpace,
) -> HPDF_Image