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This project contains precompiled versions of various optional dependencies for OpenTK. These are meant for your convenience and are completely optional to use.

The folder structure is split by CPU architecture: Dependencies/license - license files Dependencies/managed - .Net assemblies compiled for AnyCPU Dependencies/android - compiled with android-ndk Dependencies/x86/ - compiled for 32bit Intel and AMD processors Dependencies/x64/ - compiled for 64bit Intel and AMD processors

To deploy a dependency, simply copy it to your application directory, along with the relevant license file.

Detailed instructions follow.

[SDL2.dll] [libSDL2.dylib] []

The Simple DirectMedia Library compiled for Windows, Mac OS X and Android. Copy to your application directory in order to enable the SDL2 platform backend for OpenTK.

"Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D."


  • improved stability
  • improved joystick support
  • support for Macbook Retina displays
  • support for Steam "Big Picture" controller configuration


  • does not support OpenTK.GLControl (fix in progress)
  • does not support multiple mice or keyboards
  • partial support for DisplayResolution.ChangeResolution

It is highly recommended that you use the SDL2 backend on Mac OS X.


OpenAL Soft compiled for Windows. Copy this to your application directory in order to use OpenAL on Windows.

"OpenAL Soft is an LGPL-licensed, cross-platform, software implementation of the OpenAL 3D audio API."

This is required in order to use OpenAL on Windows platforms. Linux and Mac OS X support OpenAL out of the box.

[libEGL.dll] [libGLESv2.dll] [d3dcompiler_46.dll]

ANGLE Project compiled for Windows. Copy these to your application directory in order to use OpenGL ES 2.0 on Windows.

"The goal of ANGLE is to allow Windows users to seamlessly run WebGL and other OpenGL ES 2.0 content by translating OpenGL ES 2.0 API calls to DirectX 9 or DirectX 11 API calls."

These are required if you wish to publish an OpenGL ES application to the Windows Store. You can also use these in order to port or test OpenGL ES code from and to mobile devices (Android, iPhone).


Mono Linker project. Use this to reduce the size of OpenTK.dll.

"The linker is a tool one can use to only ship the minimal possible set of functions that a set of programs might require to run as opposed to the full libraries."

Execute as follows:

monolinker.exe -a YourApplication.exe

where "YourApplication.exe" is the name of your application binary. This command will create a new folder "output/" with a copy of your application and optimized version of OpenTK.dll and any other dll your application is using.


Optional (but useful) dependencies for OpenTK



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