artilla's blog

https://github.com/mattdesl/lwjgl-basics/wiki/GLSL-Versions http://www.shaderific.com/blog/2014/3/13/tutorial-how-to-update-a-shader-for-opengl-es-30 shaders & glsl in swift http://www.swiftgl.org/learn/01-shaders.html

http://stackoverflow.com/questions/17878645/glsurfaceview-how-to-make-translucent-background don't forget to set   SurfaceView.setZOrderOnTop(true)

https://github.com/CyberAgent/android-gpuimage https://github.com/chrisbatt/AndroidFastImageProcessing https://github.com/kkucherenkov/FxCameraApp