Solved.
The routine below does the job.
(Sorry for wasting your time)
// Class "scene" inherits from Gtk::GL::DrawingArea).
void
scene::save_image()
{
// First, get the Config
Glib::RefPtr< Gdk::GL::Config > glconfig;
glconfig = get_gl_config();
// Second, create a Gdk::Pixmap
Glib::RefPtr< Gdk::Pixmap > pixmap;
pixmap = Gdk::Pixmap::create( get_window(),
get_width(),
get_height(),
glconfig->get_depth()
);
// Create a Gdk::Drawable from pixmap
Glib::RefPtr< Gdk::Drawable > drawable( pixmap );
// Now create the Gdk::Pixbuf
Glib::RefPtr< Gdk::Pixbuf > pixbuf;
pixbuf = Gdk::Pixbuf::create( drawable,0,0,get_width(),get_height()
);
// And finally save the image
pixbuf->save( "image.jpg", "jpeg" );
}
On Thu, Mar 24, 2011 at 5:31 PM, Samuel Pelaez <[email protected]>wrote:
> Hi,
>
> I am developing a GUI for data visualization using OpenGL. This is done
> through the gtkglextmm library, using the Gtk::GL::DrawingArea widget.
>
> Now I want to add the "Save image" feature. As far as I understand, saving
> images in gtk is done through Gdk::Pixbuf objects, which can be instantiated
> from a Gdk::Drawable, but NOT from a Gdk::GL::Drawable.
>
> My problem is: How do I create an instance of Gdk::Pixbuf if all I have is
> a Gdk::GL::Drawable (or Gdk::GL::DrawingArea)??
>
> Any suggestions will be highly appreciated.
> Best regards,
> Samuel.
>
>
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