Some time ago I mentioned the excellent GPUImage library that eliminates the need for most of the OpenGL ES 2.0 boilerplate code making image and video filters easier on the iOS platform.
Apple made it much easier to create image filters with Core Image, but there are tremendous speed gains to be had by using OpenGL ES 2.0 directly.
Here’s a video demonstrating the filter you’ll create with the tutorial:
You can find the tutorial on Jake Gundersen’s website here.
Definitely a huge time savings by using GPUImage over coding OpenGL ES 2.0 shaders without GPUImage.
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