Preface

In 2014, Apple announced a game-changing innovation that shook up 30 years of established paradigms and caused general excitement in the field of computing. Then, 10 minutes later, it introduced Swift.

If you ask most Cocoa developers what the most exciting development was of 2014, they will overwhelmingly mention Swift. But Swift was not the only innovation Apple announced that year—the game-changer it announced was Metal, a new GPU programming framework. For decades, the default low-level graphics framework on iOS was OpenGL ES. OpenGL had grown very limited and crufty over the years. It did not take full advantage of the GPU. It did not allow general-purpose GPU programming as the newer APIs and frameworks did. Rather than adopt of ...

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