How to convert an Open GL ES 2.0 application to a Live Wallpaper?

Question

I have a class which implements GLSurfaceView.Renderer and uses Open GL ES 2.0, and works perfectly as a standard application.

However I'd like to expand this so that its a live wallpaper. Naturyally I've got a service class which exteds WallPaperservice, and in turn a engine class which extends WallpaperService.Engine.

In the normal version of the code I can just do

mGLSView = new GLSurfaceView(this); // in the engine this becomes 'new GLSurfaceView(getBaseContext());'
mGLSView.setEGLContextClientVersion(2);
mGLSView.setRenderer(new myRenderer());
setContentView(mGLSView);

However in the 'Engine' you cannot call setContentView. Presumably I need to pass the surface into the GLSurfaceView somehow, but I really cant see how. Every example or tutorial that I've found uses OpenGL 1, and because I'm quite new to this I cant quite figure out how to adapt them for 2.0.

So does anyone know of a simple example of a live wallpaper using OpenGL ES 2.0? Or a good pointer on where to readup?

Thanks,

Answer 1

Ok, got it! If you use the source from http://www.rbgrn.net/content/354-glsurfaceview-adapted-3d-live-wallpapers (And thank you very much to Robert Green for this!!)

For whatever reason I had to fix a few syntax errors, I suspect this is from having a newer version of Eclipse or whatever since the original was written.

To enable OpenGL ES 2.0 though, you need to make two changes. In the constructor of ComponentSizeChooser add

EGL10.EGL_RENDERABLE_TYPE, 4, 

To the super call. Also in createContext in DefaultContextFactory replace the null with

new int[] { 0x3098, 2, EGL10.EGL_NONE }

And that should have you enabled for GL ES 2.0.

Also, additionally, on his webpage, he has 'setRenderMode(RENDERMODE_WHEN_DIRTY);' I suspect most will want this to be 'setRenderMode(RENDERMODE_CONTINUOUSLY);'

Full code is available Here.