Intercepting OpenGL API calls
Sometimes, it is very desirable to intercept OpenGL API calls for debugging purposes or, for example, to manipulate the underlying OpenGL state before passing API calls into the real OpenGL system. You can do this to simulate mobile OpenGL on top of a desktop OpenGL implementation or vice versa. Manually writing wrappers for each and every API function is a tedious and thankless job. In this recipe, you will learn how to quickly make custom OpenGL hooks and use them in your applications.
Getting ready
This recipe uses a Python script to parse glcorearb.h and generate all the necessary scaffolding code for the wrapper functions. The complete source code for this recipe can be found in this book's source code bundle, under the name Chapter3/GL01_APIWrapping.
How to do it...
Let's write a small OpenGL application that prints all the GL API functions that have been used, along with their parameters, in the console window while the application...
