Function igImageButtonEx 

pub unsafe extern "C" fn igImageButtonEx(
    id: ImGuiID,
    tex_ref: ImTextureRef_c,
    image_size: ImVec2_c,
    uv0: ImVec2_c,
    uv1: ImVec2_c,
    bg_col: ImVec4_c,
    tint_col: ImVec4_c,
    flags: ImGuiButtonFlags,
) -> bool