GLESOffScreenRenderingDemo

a simple demo to show how to use OpenGLES off-screen rendering in android

It illustrated how to used eglCreatePbufferSurface to create a new surface and set it as the current surface for OpenGL rendering, and used glReadPixels to retrieve the pixels from the render result, store it in the bitmap.

this project is based on googlesamples/android-ndk/hello-gl2, and used latest Gradle 2.5 experiment version, which provide support for ndk project