Hi; On 24 October 2015 at 21:01, Rudolf Walter Kiss Szakacs <rudolf.wg@xxxxxxxxx> wrote: > I read that I can tweak context creation in a handler of the > "create-context" signal of GtkGLArea. GdkGLContext does have the > "shared-context" construct-only property. However, I also read that I > need to call the gdk_window_create_gl_context function to create a > context for a widget (or rather, the gdk window of the widget). Using > that, there is no way for me to specify that I want the context to > share data with an existing one. Correct; the shared context is meant to be used internally by GTK+ to ensure that the GL context you create shares resources with the paint context created by GDK. GDK cannot really let you override this behaviour, otherwise the GL drawing may break — as you can't create a GL context that shares resources with more than one context. Instead of creating a new context for all GtkGLArea widgets you can reuse the same context for all of them — when the first GtkGLArea widget is created, take its GdkGLContext and store it in some global state object; then, for every new GtkGLArea widget, override the create_context() vfunc (either by connecting to the GtkGLArea::create-context signal or by subclassing GtkGLArea itself) return the global GdkGLContext instead of creating a new instance. Ciao, Emmanuele. -- https://www.bassi.io [@] ebassi [@gmail.com] _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gtk-list
