Method resize

plugins/rendermax/renderer_opengl.hpp:101–105

        copy_from_inner();
    };
    virtual void resize(int32_t w, int32_t h) {
        copy_to_inner();
        parent->resize(w,h);
        copy_from_inner();
    };
    virtual void grid_resize(int32_t w, int32_t h) {
        copy_to_inner();
        parent->grid_resize(w,h);