. Unlike older versions that relied on the "fixed-function pipeline" (think basic shapes and simple lighting), the 9th edition focuses almost entirely on the programmable pipeline Why this edition is the "Gold Standard": Shader Mastery:
While the convenience of a digital PDF is undeniable, it is important to respect the work of the authors—Dave Shreiner, Graham Sellers, and John Kessenich. These experts defined the standards we use today. opengl programming guide 9th edition pdf exclusive