+#elif defined(SYS_MAC)
+#include <gdk/gdkquartz.h>
+void gtk_gl_enable(GtkWidget *widget)
+{
+ g_debug("GtkGl: enable");
+
+ /* Create context */
+ NSOpenGLPixelFormatAttribute attribs[] = {
+ NSOpenGLPFAColorSize, 24,
+ NSOpenGLPFAAlphaSize, 8,
+ NSOpenGLPFADepthSize, 1,
+ NSOpenGLPFADoubleBuffer,
+ 0
+ };
+ NSOpenGLPixelFormat *pix = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
+ NSOpenGLContext *ctx = [[NSOpenGLContext alloc] initWithFormat:pix shareContext:nil];
+
+ /* Attach to widget */
+ gtk_widget_set_double_buffered(widget, FALSE);
+
+ /* Save context */
+ g_object_set_data(G_OBJECT(widget), "glcontext", ctx);
+}
+
+void gtk_gl_begin(GtkWidget *widget)
+{
+ g_debug("GtkGl: begin");
+ GtkAllocation alloc;
+ gdk_window_ensure_native(gtk_widget_get_window(widget));
+ gtk_widget_get_allocation(widget, &alloc);
+
+ NSOpenGLContext *ctx = g_object_get_data(G_OBJECT(widget), "glcontext");
+ GdkWindow *win = gtk_widget_get_window(widget);
+ NSView *view = gdk_quartz_window_get_nsview(win);
+ NSRect rect = NSMakeRect(alloc.x, alloc.y, alloc.width, alloc.height);
+
+ [ctx setView:view];
+ [ctx makeCurrentContext];
+ [ctx update];
+ [view setFrame:rect];
+}
+
+void gtk_gl_end(GtkWidget *widget)
+{
+ g_debug("GtkGl: end");
+ NSOpenGLContext *ctx = g_object_get_data(G_OBJECT(widget), "glcontext");
+ [ctx flushBuffer];
+}
+
+void gtk_gl_disable(GtkWidget *widget)
+{
+ g_debug("GtkGl: disable");
+}