Gtkmm Show Image MainFoo

#include <gtkmm.h>

#include <iostream>
#include <cstring>
#include <vector>

int main (int argc, char *argv[])
{
    Glib::RefPtr<Gtk::Application> app = Gtk::Application::create();

    Gtk::Window main_window;

    main_window.set_title ("Show Image");
    main_window.set_position (Gtk::WIN_POS_CENTER);

    Glib::RefPtr<Gdk::Pixbuf> ref_orig = Gdk::Pixbuf::create_from_file ("./image.png");

    const guint8* raw = ref_orig->get_pixels();
    const std::vector<guint8> image_pixels (raw, raw + ref_orig->get_byte_length());

    Glib::RefPtr<Gdk::Pixbuf> ref_dest =
        Gdk::Pixbuf::create_from_data (
            image_pixels.data(), Gdk::COLORSPACE_RGB,
            ref_orig->get_has_alpha(), ref_orig->get_bits_per_sample(),
            ref_orig->get_width(), ref_orig->get_height(), ref_orig->get_rowstride());

    Gtk::Image image;
    image.set (ref_dest);

    main_window.add (image);

    main_window.show_all_children();

    return app->run (main_window);
}