int main (int argc, char* argv[])
{
GtkWidget* window;
GtkWidget* drawarea;
GdkGLConfig* glconfig;
gtk_init (&argc, &argv);
gdk_gl_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
drawarea = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawarea, 400, 300);
gtk_container_add (GTK_CONTAINER (window), drawarea);
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_set_events (drawarea, GDK_EXPOSURE_MASK);
glconfig = gdk_gl_config_new_by_mode (GDK_GL_MODE_RGB | GDK_GL_MODE_DEPTH | GDK_GL_MODE_DOUBLE);
gtk_widget_set_gl_capability (drawarea, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE);
gtk_signal_connect (GTK_OBJECT (drawarea), "expose-event", G_CALLBACK (display), NULL);
gtk_signal_connect (GTK_OBJECT (drawarea), "configure-event", G_CALLBACK (reshape), NULL);
g_idle_add (idle, drawarea);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
int
main (int argc,
char *argv[])
{
gint major, minor;
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *drawing_area;
GtkWidget *button;
/*
* Init GTK.
*/
gtk_init (&argc, &argv);
/*
* Init GdkGLExt.
*/
gdk_gl_init (&argc, &argv);
/*
* Query OpenGL extension version.
*/
gdk_gl_query_version (&major, &minor);
g_print ("\nOpenGL extension version - %d.%d\n",
major, minor);
/*
* Configure OpenGL-capable visual.
*/
/* Try double-buffered visual */
glconfig = gdk_gl_config_new (&config_attributes[0]);
if (glconfig == NULL)
{
g_print ("*** Cannot find the double-buffered visual.\n");
g_print ("*** Trying single-buffered visual.\n");
/* Try single-buffered visual */
glconfig = gdk_gl_config_new (&config_attributes[1]);
if (glconfig == NULL)
{
g_print ("*** No appropriate OpenGL-capable visual found.\n");
exit (1);
}
}
examine_gl_config_attrib (glconfig);
/*
* Top-level window.
*/
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "low-level");
/*
* If window manager doesn't watch the WM_COLORMAP_WINDOWS property on
* the top-level window, we have to set OpenGL window's colormap to the
* top-level window.
*/
gtk_widget_set_colormap (window,
gdk_gl_config_get_colormap (glconfig));
/* Get automatically redrawn if any of their children changed allocation. */
gtk_container_set_reallocate_redraws (GTK_CONTAINER (window), TRUE);
g_signal_connect (G_OBJECT (window), "delete_event",
G_CALLBACK (gtk_main_quit), NULL);
/*
* VBox.
*/
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_widget_show (vbox);
/*
* Drawing area for drawing OpenGL scene.
*/
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, 200, 200);
/* Set OpenGL-capable colormap. */
gtk_widget_set_colormap (drawing_area,
gdk_gl_config_get_colormap (glconfig));
/* Disable backing store feature of the widget. */
gtk_widget_set_double_buffered (drawing_area, FALSE);
g_signal_connect_after (G_OBJECT (drawing_area), "realize",
G_CALLBACK (realize), NULL);
g_signal_connect (G_OBJECT (drawing_area), "size_allocate",
G_CALLBACK (size_allocate), NULL);
g_signal_connect (G_OBJECT (drawing_area), "configure_event",
G_CALLBACK (configure_event), NULL);
g_signal_connect (G_OBJECT (drawing_area), "expose_event",
G_CALLBACK (expose_event), NULL);
g_signal_connect (G_OBJECT (drawing_area), "unrealize",
G_CALLBACK (unrealize), NULL);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_widget_show (drawing_area);
/*
* Simple quit button.
*/
button = gtk_button_new_with_label ("Quit");
g_signal_connect (G_OBJECT (button), "clicked",
G_CALLBACK (gtk_main_quit), NULL);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
/*
* Show window.
*/
gtk_widget_show (window);
/*
* Main loop.
*/
/* Destroy the GLX context explicitly when application is terminated. */
gtk_quit_add_destroy (gtk_main_level () + 1,
GTK_OBJECT (drawing_area));
gtk_main ();
return 0;
}
