Presenting Edgehog: A method for doing fractal rectangle checking quickly on multiple ARM Neon cores. The output is rendered by a GPU using the Depth First Algorithm (DFA) described in the article "GPU Hacks" (Corneliusen 2016, 2017). This makes it possible to render 1080p60 depth 256 fractals on a dainty NVidia Jetson Nano. Full source code included.
Introducing a fast Lanczos-2 image scaler for ARM Neon written in C and intrinsics. It uses a unique method for applying separable filters described in the article "Exploiting the Cache: Faster Separable Filters" (Corneliusen 2018). An ARMv7 Neon Assembler implementation from 2014 gets a makeover. Full source code included.
(PDF, 368KB) It's been two years since the launch of the discordant book Real Programming. This 10-page article sums up all the main themes and looks at what has happened since then.
The Xmas Demo 2022 for the NVidia Jetson AGX Orin Developer Kit. Shader code available for download. A more polished version of last year's demo that exploits the extra power in the Orin.
The Xmas Demo 2021 for the NVidia Jetson AGX Xavier. Full source code available. It demonstrates Sjur's new 3D engine called V73D and has animated objects using inverse kinematics. And a bunch of recycled and optimized shaders and stuff, and some music too.
A book about programming, programmers, programs, and pop culture. Co-authored with Sjur Julin. Tired of crap books promising to teach you the latest programming fad in 21 days? This one is the polar opposite! It contains a lot of real code written in real programming languages like C and assembler. A recurring theme is criticism of modern development methods, software management, languages, and compilers.
The Xmas Demo 2020 is an updated version of the one from 2017. The source code from 2017 was revised to run on any graphics card and CPU. It still runs on the target NVidia Tegra X2 in 60 fps. Full source code available. Music and graphics by Sjur.
