+#include <config.h>
+#include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
+#include <GL/gl.h>
+
+static gboolean expose_start(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+{
+ GdkGLContext *glcontext = gtk_widget_get_gl_context (da);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (da);
+
+ if (!gdk_gl_drawable_gl_begin (gldrawable, glcontext)) {
+ g_assert_not_reached ();
+ }
+
+ /* draw in here */
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+/* Plugins run stuff here */
+static gboolean expose_end(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+{
+ GdkGLContext *glcontext = gtk_widget_get_gl_context (da);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (da);
+
+ if (gdk_gl_drawable_is_double_buffered (gldrawable))
+ gdk_gl_drawable_swap_buffers (gldrawable);
+ else
+ glFlush ();
+
+ gdk_gl_drawable_gl_end (gldrawable);
+
+ return FALSE;
+}
+static gboolean configure(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
+{
+ GdkGLContext *glcontext = gtk_widget_get_gl_context (da);
+ GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (da);
+
+ if (!gdk_gl_drawable_gl_begin (gldrawable, glcontext))
+ g_assert_not_reached ();
+
+ glLoadIdentity();
+ glViewport (0, 0, da->allocation.width, da->allocation.height);
+ glOrtho (-10,10,-10,10,-20050,10000);
+ glEnable (GL_BLEND);
+ glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+ glScalef (10., 10., 10.);
+
+ gdk_gl_drawable_gl_end (gldrawable);
+
+ return TRUE;
+}
+
+gboolean opengl_init(GtkDrawingArea *drawing, GtkNotebook *config)
+{
+ /* Set up OpenGL Stuff */
+ g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), NULL);
+
+ //g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
+ g_signal_connect (drawing, "expose-event", G_CALLBACK(expose_start), NULL);
+ g_signal_connect_after(drawing, "expose-event", G_CALLBACK(expose_end), NULL);
+}