6 static gboolean expose_start(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
8 GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
9 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
11 if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext)) {
12 g_assert_not_reached();
16 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
19 /* Plugins run stuff here */
20 static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
22 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
24 if (gdk_gl_drawable_is_double_buffered(gldrawable))
25 gdk_gl_drawable_swap_buffers(gldrawable);
29 gdk_gl_drawable_gl_end(gldrawable);
33 static gboolean configure_start(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
35 GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
36 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
38 if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
39 g_assert_not_reached();
42 glViewport(0, 0, da->allocation.width, da->allocation.height);
44 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
45 //glEnable(GL_ALPHA_TEST);
46 //glAlphaFunc(GL_EQUAL, 0);
47 double scale = 500*1000; // 500 km
48 glOrtho(-scale,scale,-scale,scale,0,10000);
52 static gboolean configure_end(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
54 GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
55 gdk_gl_drawable_gl_end(gldrawable);
59 gboolean opengl_init(GtkDrawingArea *drawing, GtkNotebook *config)
61 /* Set up OpenGL Stuff */
62 g_signal_connect (drawing, "configure-event", G_CALLBACK(configure_start), NULL);
63 g_signal_connect_after(drawing, "configure-event", G_CALLBACK(configure_end), NULL);
64 g_signal_connect (drawing, "expose-event", G_CALLBACK(expose_start), NULL);
65 g_signal_connect_after(drawing, "expose-event", G_CALLBACK(expose_end), NULL);