Function igImageButtonEx 

pub unsafe extern "C" fn igImageButtonEx(
    id: ImGuiID,
    tex_ref: ImTextureRef,
    image_size: ImVec2,
    uv0: ImVec2,
    uv1: ImVec2,
    bg_col: ImVec4,
    tint_col: ImVec4,
    flags: ImGuiButtonFlags,
) -> bool