September 2018
Intermediate to advanced
472 pages
15h 36m
English
Content preview from OpenGL 4 Shading Language Cookbook - Third Edition
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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 to debug a program. The glGetError function returns an error code if an error has occurred at some point before 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, we can register ...
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