What I will say is that writing this method felt very strangepic.twitter.com/WJNSDLxJK3
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I’m not gonna tell you I spent all day writing a buggy, incomplete implementation of OpenGL ES 1.0 on top of Metal, but I’m also not going to tell you I didn’t do that.
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If we evaluate such things by their ability to replicate NeHe lessons, I’d say we’re at Level 2pic.twitter.com/Gq8CyJDpxM
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Lesson 4. Getting back to the basics is so therapeutic (even when you make embarrassing mistakes like reversing the order of transformation matrices…)pic.twitter.com/5q23Xq0uEm
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I can tell you from experience that a less-buggy, nearly-complete implementation of OpenGL ES 1.1 on top of another API (say, ES 2) takes 2 to 3 months.
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After today’s experience, I believe you.
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Before, we would say “Try writing a software renderer to learn graphics”. But will it become “Try writing an implicit API”? Is this what progress feels like?
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Yes, and, there’s value in dissecting and understanding (from an implementor’s perspective) any layer of abstraction in any stack upon which you rely.
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Just FYI, the iPhone 8 and X actually feature a system-level GLES-on-Metal layer, presumably because they didn't want to write a native GLES driver for their custom-designed GPU but still needed to maintain compatibility ¯\_(ツ)_/¯
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see also MoltenGL btw - https://moltengl.com . it wasn't part of our work with Brenwill to OSS MoltenVK partly because -ES but partly, well, none of us knew GL would get hard deprecated soon.
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No, you’re going to do both.
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