Getting debug messages
Prior to recent versions of OpenGL, the traditional way to get debug information was to call glGetError. Unfortunately, that is an exceedingly tedious method for debugging a program. The glGetError function returns an error code if an error has occurred at some point previous to the time the function was called. This means that if we're chasing down a bug, we essentially need to call glGetError after every function call to an OpenGL function, or do a binary search-like process where we call it before and after a block of code, and then move the two calls closer to each other until we determine the source of the error. What a pain!
Thankfully, as of OpenGL 4.3, we now have support for a more modern method for debugging. Now ...
Get OpenGL – Build high performance graphics now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
