/**
* gdk_window_set_gl_capability:
* @window: the #GdkWindow to be used as the rendering area.
* @glconfig: a #GdkGLConfig.
* @attrib_list: this must be set to NULL or empty (first attribute of None).
*
* Set the OpenGL-capability to the @window.
* This function creates a new #GdkGLWindow held by the @window.
* attrib_list is currently unused. This must be set to NULL or empty
* (first attribute of None).
*
* Return value: the #GdkGLWindow used by the @window if it is successful,
* NULL otherwise.
**/
GdkGLWindow *
gdk_window_set_gl_capability (GdkWindow *window,
GdkGLConfig *glconfig,
const int *attrib_list)
{
GdkGLWindow *glwindow;
GDK_GL_NOTE_FUNC ();
g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
g_return_val_if_fail (GDK_IS_GL_CONFIG (glconfig), NULL);
if (quark_gl_window == 0)
quark_gl_window = g_quark_from_static_string (quark_gl_window_string);
/* If already set */
glwindow = g_object_get_qdata (G_OBJECT (window), quark_gl_window);
if (glwindow != NULL)
return glwindow;
/*
* Create GdkGLWindow
*/
glwindow = gdk_gl_window_new (glconfig, window, attrib_list);
if (glwindow == NULL)
{
g_warning ("cannot create GdkGLWindow\n");
return NULL;
}
g_object_set_qdata_full (G_OBJECT (window), quark_gl_window, glwindow,
(GDestroyNotify) g_object_unref);
/*
* Set a background of "None" on window to avoid AIX X server crash
*/
GDK_GL_NOTE (MISC,
g_message (" - window->bg_pixmap = %p",
(void*)gdk_window_get_background_pattern (window)));
gdk_window_set_background_pattern (window, NULL);
GDK_GL_NOTE (MISC,
g_message (" - window->bg_pixmap = %p",
(void*)gdk_window_get_background_pattern (window)));
return glwindow;
}
static void
realize (GtkWidget *widget,
gpointer data)
{
GLUquadricObj *qobj;
static GLfloat light_diffuse[] = {1.0, 0.0, 0.0, 1.0};
static GLfloat light_position[] = {1.0, 1.0, 1.0, 0.0};
/*
* Create GdkGLWindow for widget->window.
*/
glwindow = gdk_gl_window_new (glconfig,
widget->window,
NULL);
/* Set a background of "None" on window to avoid AIX X server crash */
gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
/*
* Create OpenGL rendering context.
*/
if (glcontext == NULL)
{
glcontext = gdk_gl_context_new (GDK_GL_DRAWABLE (glwindow),
NULL,
TRUE,
GDK_GL_RGBA_TYPE);
if (glcontext == NULL)
{
g_print ("Connot create the OpenGL rendering context\n");
exit (1);
}
g_print ("The OpenGL rendering context is created\n");
}
/*** OpenGL BEGIN ***/
if (!gdk_gl_drawable_gl_begin (GDK_GL_DRAWABLE (glwindow), glcontext))
return;
qobj = gluNewQuadric ();
gluQuadricDrawStyle (qobj, GLU_FILL);
glNewList (1, GL_COMPILE);
gluSphere (qobj, 1.0, 20, 20);
glEndList ();
glLightfv (GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv (GL_LIGHT0, GL_POSITION, light_position);
glEnable (GL_LIGHTING);
glEnable (GL_LIGHT0);
glEnable (GL_DEPTH_TEST);
glClearColor (1.0, 1.0, 1.0, 1.0);
glClearDepth (1.0);
glViewport (0, 0,
widget->allocation.width, widget->allocation.height);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
gluPerspective (40.0, 1.0, 1.0, 10.0);
glMatrixMode (GL_MODELVIEW);
glLoadIdentity ();
gluLookAt (0.0, 0.0, 3.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0);
glTranslatef (0.0, 0.0, -3.0);
gdk_gl_drawable_gl_end (GDK_GL_DRAWABLE (glwindow));
/*** OpenGL END ***/
}
