--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gtkglext-test.c	Fri May 14 00:21:49 2010 +0200
@@ -0,0 +1,82 @@
+/* This file is part of mingw-cross-env.       */
+/* See doc/index.html for further information. */
+
+#include <gtk/gtk.h>
+#include <gtk/gtkgl.h>
+#include <GL/gl.h>
+
+static gboolean eventExpose(GtkWidget *gl, GdkEventExpose *e, gpointer userData)
+{
+    GdkGLContext *ctx = gtk_widget_get_gl_context(gl);
+    GdkGLDrawable *drawable = gtk_widget_get_gl_drawable(gl);
+
+    gdk_gl_drawable_gl_begin(drawable, ctx);
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    if (!gdk_gl_drawable_is_double_buffered(drawable))
+        glFinish();
+    else
+        gdk_gl_drawable_swap_buffers(drawable);
+
+    gdk_gl_drawable_gl_end(drawable);
+
+    return TRUE;
+}
+
+static gboolean eventConfigure(GtkWidget *gl, GdkEventConfigure *e, gpointer userData)
+{
+    const guint width = gl->allocation.width;
+    const guint height = gl->allocation.height;
+
+    glLoadIdentity();
+    glViewport(0, 0, width, height);
+    glOrtho(-3.5, 3.5, -3.5 * (GLfloat)height / (GLfloat)width,
+        3.5 * (GLfloat)height / (GLfloat)width, -3.5, 3.5);
+
+    return TRUE;
+}
+
+int main(int argc, char *argv[])
+{
+    GtkWidget* window;
+    GtkWidget* gl;
+    GdkGLConfig* glConfig;
+
+    gtk_init(&argc, &argv);
+    gtk_gl_init(&argc, &argv);
+
+    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+    gl = gtk_drawing_area_new();
+    gtk_container_add(GTK_CONTAINER(window), gl);
+
+    gtk_widget_set_events(gl, GDK_EXPOSURE_MASK);
+
+    glConfig = gdk_gl_config_new_by_mode(
+        GDK_GL_MODE_RGB |
+        GDK_GL_MODE_ALPHA |
+        GDK_GL_MODE_DEPTH |
+        GDK_GL_MODE_DOUBLE);
+
+    gtk_widget_set_gl_capability(gl, glConfig,
+        NULL, TRUE, GDK_GL_RGBA_TYPE);
+
+    g_signal_connect_swapped(
+        G_OBJECT(window), "destroy",
+        G_CALLBACK(gtk_main_quit), G_OBJECT(window));
+
+    g_signal_connect(
+        G_OBJECT(window), "destroy",
+        G_CALLBACK(gtk_main_quit), NULL);
+
+    g_signal_connect(gl, "configure-event",
+        G_CALLBACK(eventConfigure), NULL);
+
+    g_signal_connect(gl, "expose-event",
+        G_CALLBACK(eventExpose), NULL);
+
+    gtk_widget_show_all(window);
+
+    gtk_main();
+    return 0;
+}