In the code snippet section you can see how to setup OpenGL ES View and use it for applying filter to an image. To use this application just get the source code by commenting and get source code in your email and then open the project and build the project.use Slider to apply a filter and each filter is applied at a time. The Source codes the following Resource files. View Controller.h View Controller.m These Controllers Redraws the image when any filter is applied or as a result UI Actions. EagleView.h EagleView.m This Class Wraps this layer class for CoreAnimation into UIView Subclass. Debug.h Debug.c Debug Class Debugs the real time errors.