Re: [Vala] OpenGL and gtkglext Bindings!!!

["Matías De la Puente" <mfpuente ar gmail com>]

Hi Everyone:

I updated the opengl vapi files, they have some writing errors but they work fine...

I made a glx binding but still testing ...

Zeeshan: I make the parameter nullable but the other think I can't make it work. I think it is a vala bug...

here is an example to test:

using GLib;
using Gtk;
using Gdk;
using GL;

public class Simple : Gtk.Window
{

    private bool on_configure_event (Gtk.DrawingArea widget, Gdk.EventConfigure event)
    {
        Gdk.GL.Context glcontext = Gtk.GL.GtkWidgetExtension.get_gl_context (widget);
        Gdk.GL.Drawable gldrawable = Gtk.GL.GtkWidgetExtension.get_gl_drawable (widget);

        if (!(bool)gldrawable.gl_begin (glcontext))
            return false;

        GL.Viewport (0, 0, (GLsizei)widget.allocation.width, (GLsizei)widget.allocation.height);

        gldrawable.gl_end ();
        return true;
    }

    private bool on_expose_event (Gtk.DrawingArea widget, Gdk.EventExpose event)
    {
        Gdk.GL.Context glcontext = Gtk.GL.GtkWidgetExtension.get_gl_context (widget);
        Gdk.GL.Drawable gldrawable = Gtk.GL.GtkWidgetExtension.get_gl_drawable (widget);

        if (!(bool)gldrawable.gl_begin (glcontext))
            return false;

        GL.Clear (GL.Consts.COLOR_BUFFER_BIT);
       
        GL.Begin (GL.Consts.TRIANGLES);
            GL.Indexi (0);
            GL.Color3f (1.0f, 0.0f, 0.0f);
            GL.Vertex2i (0, 1);
            GL.Indexi (0);
            GL.Color3f (0.0f, 1.0f, 0.0f);
            GL.Vertex2i (-1, -1);
            GL.Indexi (0);
            GL.Color3f (0.0f, 0.0f, 1.0f);
            GL.Vertex2i (1, -1);
        GL.End ();

        if (gldrawable.is_double_buffered ())
            gldrawable.swap_buffers ();
        else
            GL.Flush ();

        gldrawable.gl_end ();
        return true;
    }

    construct
    {
        title = "simple";
        set_reallocate_redraws (true);
        destroy += Gtk.main_quit;
       
        Gdk.GL.Config glconfig = new Gdk.GL.Config.by_mode (Gdk.GL.ConfigMode.RGB | Gdk.GL.ConfigMode.DOUBLE);
       
        Colormap colormap = glconfig.get_colormap ();
       
        DrawingArea drawing_area = new DrawingArea ();
        drawing_area.set_size_request (200, 200);

        Gtk.GL.GtkWidgetExtension.set_gl_capability (drawing_area, glconfig, null, true, Gdk.GL.RenderType.RGBA_TYPE);
       
        drawing_area.configure_event += on_configure_event;
        drawing_area.expose_event += on_expose_event;
       
        add (drawing_area);
    }

    public static void main (string[] args)
    {
        Gtk.init (ref args);
        Gtk.GL.init (ref args);
       
        var simple = new Simple    ();
        simple.show_all ();
       
        Gtk.main ();
    }
}