public GLArea(int[] attrlist)
{
DoubleBuffered = false;
dpy = gdk_x11_display_get_xdisplay (Gdk.Display.Default.Handle);
Gdk.Visual visual = ChooseVisual (attrlist);
XVisualInfo vi_template = new XVisualInfo ();
vi_template.visual = gdk_x11_visual_get_xvisual (visual.Handle);
vi_template.visualid = XVisualIDFromVisual (vi_template.visual);
GdkVisual gvisual = Marshal.PtrToStructure(visual.Handle, typeof(GdkVisual)) as GdkVisual;
Console.WriteLine (gvisual.depth);
//vi_template.depth = (uint)GdkWindow.Depth; //TODO: correct?
vi_template.depth = 16; //TODO: don't hardcode
vi_template.screen = Gdk.Display.Default.DefaultScreen.Number;
int nret = 0;
XVisualInfo vi = XGetVisualInfo (dpy, (int) (VisualMask.IDMask | VisualMask.DepthMask | VisualMask.ScreenMask), vi_template, out nret);
if (vi == null || nret != 1)
Console.WriteLine ("Error");
ctx = glXCreateContext (dpy, vi, IntPtr.Zero, false);
}
internal static extern XVisualInfo XGetVisualInfo(IntPtr display, int vinfo_mask, XVisualInfo vinfo_template, out int nitems_return);
internal static extern IntPtr glXCreateContext(IntPtr dpy, XVisualInfo vis, IntPtr shareList, bool direct);