+ GisPluginEnv *env = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
+ env->viewer = g_object_ref(viewer);
+
+ /* Create objects */
+ GisCallback *callback = gis_callback_new(expose, env);
+ GisTile *background = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
+ glGenTextures(1, &env->tex);
+ background->data = &env->tex;