/***
*** The "realize" signal handler. All the OpenGL initialization
*** should be performed here, such as default background colour,
*** certain states etc.
***/
static void
realize (GtkWidget *widget,
gpointer data)
{
void (APIENTRY *PolygonOffset)(GLfloat, GLfloat) = NULL;
/*** OpenGL BEGIN ***/
if (!gtk_widget_begin_gl (widget))
return;
/* glPolygonOffsetEXT */
PolygonOffset = (void (APIENTRY *)(GLfloat, GLfloat))gdk_gl_get_proc_address ("glPolygonOffsetEXT");
if (PolygonOffset == NULL)
{
/* glPolygonOffset */
PolygonOffset = (void (APIENTRY *)(GLfloat, GLfloat))gdk_gl_get_proc_address ("glPolygonOffset");
if (PolygonOffset == NULL)
{
g_print ("Sorry, glPolygonOffset() is not supported by this renderer.\n");
exit (1);
}
}
glEnable (GL_DEPTH_TEST);
glDepthFunc (GL_LEQUAL);
glClearColor (0.0, 0.0, 0.0, 0.0);
PolygonOffset (1.0, 1.0);
glEnable (GL_CULL_FACE);
glHint (GL_LINE_SMOOTH_HINT, GL_NICEST);
glHint (GL_POLYGON_SMOOTH_HINT, GL_NICEST);
glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable (GL_COLOR_MATERIAL);
glColorMaterial (GL_FRONT, GL_DIFFUSE);
glLightfv (GL_LIGHT0, GL_POSITION, lightPosition);
glEnable (GL_LIGHT0);
glShadeModel (GL_FLAT);
glDisable (GL_LIGHTING);
resetWireframe ();
gtk_widget_end_gl (widget, FALSE);
/*** OpenGL END ***/
return;
}
PolygonOffset *PolygonOffset::getOrCreate(GLfloat factor, GLfloat units)
{
return getOrCreateImpl(PolygonOffset(factor, units));
}
