OpenTK.Platform.Egl.Egl.ChooseConfig C# (CSharp) Метод

        public static extern bool ChooseConfig(EGLDisplay dpy, int[] attrib_list, [In, Out] EGLConfig[] configs, int config_size, out int num_config);
        [DllImportAttribute("libEGL.dll", EntryPoint = "eglGetConfigAttrib")]

        public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil,
                                               int samples, ColorFormat accum, int buffers, bool stereo,
                                               RenderableFlags renderable_flags)
        {
            IntPtr[] configs    = new IntPtr[1];
            int[]    attribList = new int[]
            {
                //Egl.SURFACE_TYPE, Egl.WINDOW_BIT,
                Egl.RENDERABLE_TYPE, (int)renderable_flags,

                Egl.RED_SIZE, color.Red,
                Egl.GREEN_SIZE, color.Green,
                Egl.BLUE_SIZE, color.Blue,
                Egl.ALPHA_SIZE, color.Alpha,

                Egl.DEPTH_SIZE, depth > 0 ? depth : 0,
                Egl.STENCIL_SIZE, stencil > 0 ? stencil : 0,

                Egl.SAMPLE_BUFFERS, samples > 0 ? 1 : 0,
                Egl.SAMPLES, samples > 0 ? samples : 0,

                Egl.NONE,
            };

            // Todo: what if we don't wish to use the default display?
            IntPtr display = Egl.GetDisplay(IntPtr.Zero);
            int    major, minor;

            if (!Egl.Initialize(display, out major, out minor))
            {
                throw new GraphicsModeException(String.Format("Failed to initialize display connection, error {0}", Egl.GetError()));
            }

            int num_configs;

            if (!Egl.ChooseConfig(display, attribList, configs, configs.Length, out num_configs) || num_configs == 0)
            {
                throw new GraphicsModeException(String.Format("Failed to retrieve GraphicsMode, error {0}", Egl.GetError()));
            }

            // See what we really got
            IntPtr active_config = configs[0];
            int    r, g, b, a;

            Egl.GetConfigAttrib(display, active_config, Egl.RED_SIZE, out r);
            Egl.GetConfigAttrib(display, active_config, Egl.GREEN_SIZE, out g);
            Egl.GetConfigAttrib(display, active_config, Egl.BLUE_SIZE, out b);
            Egl.GetConfigAttrib(display, active_config, Egl.ALPHA_SIZE, out a);
            int d, s;

            Egl.GetConfigAttrib(display, active_config, Egl.DEPTH_SIZE, out d);
            Egl.GetConfigAttrib(display, active_config, Egl.STENCIL_SIZE, out s);
            int sample_buffers;

            Egl.GetConfigAttrib(display, active_config, Egl.SAMPLES, out sample_buffers);
            Egl.GetConfigAttrib(display, active_config, Egl.SAMPLES, out samples);

            return(new GraphicsMode(active_config, new ColorFormat(r, g, b, a), d, s, sample_buffers > 0 ? samples : 0, 0, 2, false));
        }