NatRender is a lightweight graphics utility library for Unity Engine. Features include:

• High performance pixel buffer readbacks from the GPU on iOS and Android (including OpenGL ES3).
• Running delegates on Unity's render thread.

NatShare should be installed using the Unity Package Manager. In your manifest.json file, add the following dependency:

{
  "dependencies": {
    "com.natsuite.natrender": "git+https://github.com/natsuite/NatRender"
  }
}

NatRender provides lightweight primitives for performing pixel buffer readbacks from textures on the GPU. This is exposed through implementations the IReadback interface. Currently, NatRender provides the following implementations:

• GLESReadback for Android when rendering with OpenGL ES3.
• MTLReadback for iOS when rendering with Metal.
• AsyncReadback for platforms that support Unity's async readbacks.
• SyncReadback for all platforms. Note that this implementation has the worst performance.

Once you create a readback, you can request the pixel data by calling the Readback method:

// Starting with some texture you want to readback
var texture = ...;
// Create readback
var readback = new GLESReadback(...) or new MLTReadback(...) or ...;
// Issue request
readback.Request(texture, (NativeArray<byte> pixelBuffer) => {
    // Do stuff with pixel buffer
});
// And when you're done remember to dispose
readback.Dispose();

NatRender also provides a way to run an Action on Unity's render thread. This is useful for performing native rendering or doing anything that requires being on the primary render thread:

RenderThread.Run(() => {
    // We're on Unity's render thread
    Debug.Log("Hello from the render thread");
});

• Unity 2019.2+
• Android API level 24+
• iOS 13+

• NatRender Documentation
• NatSuite Framework on GitHub
• Email Support

Thank you very much!