Скачать или смотреть From Pure ISO C++20 To Compute Shaders - Koen Samyn - CppCon 2025

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From Pure ISO C++20 To Compute Shaders - Koen Samyn - CppCon 2025
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Modern graphics and compute projects still force developers to write every kernel twice—once in C++ for CPU debugging and again in GLSL/HLSL for the GPU.  This session shows how entirely standard C++20 can unify those worlds. C++ features such as constexpr, user defined literals and templates are used to write C++ source code that can be transpiled easily into GLSL or HLSL.

Attendees will learn three reusable techniques:

Metadata as templates, not attributes – e.g. resources like Buffer＜float,0,2＞ encode set & binding in ordinary non‑type parameters, so any ISO‑compliant compiler accepts the code and tooling can reflect it without macros or vendor keywords.

CPU work‑group emulation – std::execution::par_unseq plus a per‑group std::barrier faithfully reproduces compute shader parallellism, enabling single‑step debugging in a familiar debugger.

AST‑driven transpile & reflection – a lightweight Clang LibTooling pass converts the same source file to GLSL, inserts #line mappings for error reporting, and emits a JSON descriptor table that engines can consume automatically.

If you want to dive into the world of compute shading without leaving the familiarity of C++, this is the talk for you.

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Slides: https://github.com/CppCon/CppCon2025/...

Work at Hudson River Trading (HRT): https://tinyurl.com/safxfctf
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Koen Samyn

Koen is a senior software engineer and lecturer at digital art and entertainment whose primary focus is bringing modern C++ to GPU-driven game technology. Over the past decade he has built and optimized compute-shader pipelines for lighting, physics, and inverse kinematics. In the classroom Koen mentors future developers on topics such as C++20/23 concurrency, data-oriented design, and the nuances of dispatching workloads across CPU and GPU.
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