Example of android fingerpaint in opengl?

I need to implement free form drawing in a paint app. I started with the canvas method (fingerpain开发者_开发知识库t example in android) but the performance is extremely slow.

I'm now switching to openGL. If any one can point to good tutorials how I can proceed, it will help me a lot.

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SpriteMethodTest from Chris Pruett is a good start to proceed: https://github.com/mitchellhislop/apps-for-android/tree/master/SpriteMethodTest