Replying to myself:
Talked to Emmanuele on IRC...the gist is:
* no, this won't work
* GtkOffscreenWindow shouldn't be used in general
* The desired effect can be achieved by using a GtkWindow, not showing it,
and explicitly mapping the widget
Rob
________________________________
From: gtk-list <gtk-list-boun...@gnome.org> on behalf of Rob Conde
<rob.co...@ai-solutions.com>
Sent: Thursday, October 4, 2018 8:17:59 AM
To: gtk-list@gnome.org
Subject: GtkGLArea with GtkOffscreenWindow
Hello,
Consider the following program:
int main()
{
gtk_init(nullptr,nullptr);
auto window = gtk_offscreen_window_new();
auto gl_area = gtk_gl_area_new();
gtk_container_add(GTK_CONTAINER(window),gl_area);
gtk_widget_realize(gl_area);
gtk_widget_show_all(window);
auto glContext = gtk_gl_area_get_context(GTK_GL_AREA(gl_area));
std::cout << "Context is " << glContext << std::endl;
gtk_main();
}
The glContext is null. Can GtkGLArea work with GtkOffscreenWindow?
Thanks,
Rob Conde
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