OpenTK Structure

The OpenTK solution provides the following public namespaces:

• OpenTK: contains classes to create windows (GameWindow, NativeWindow), perform 3d math, interact with the monitor (DisplayDevice, DisplayResolution) as well as query the platform configuration.
• OpenTK.Graphics: contains bindings for OpenGL and OpenGL|ES.
• OpenTK.Audio: contains bindings for OpenAL.
• OpenTK.Compute: contains bindings for OpenCL.
• OpenTK.Input: contains classes to interact with input devices (Keyboard, Mouse, Joystick).
• OpenTK.Platform: contains classes to extend OpenTK or interact with the underlying platform.

The public API of OpenTK is completely cross-platform. All platform-specific code is contained in internal interfaces under the OpenTK.Platform namespace. In that sense, most public classes act as façades that forward method calls to the correct platform-specific implementation.

public class Foo : IFoo
{
    IFoo implementation;
 
    public Foo()
    {
        implementation = OpenTK.Platform.Factory.Default.CreateFoo();
    }
 
    #region IFoo Members
 
    public void Bar()
    {
        implementation.Bar();
    }
 
    #endregion
}

This pattern is used in all public OpenTK classes that need platform-specific code to operate: DisplayDevice, DisplayResolution, GraphicsContext, GraphicsMode, NativeWindow and the various input classes.

Classes that do not rely on platform-specific code and classes that contain performance-sensitive code do not use this pattern: the various math classes, the OpenGL, OpenCL and OpenAL bindings, the AudioContext and AudioCapture classes all fall into these categories.