Building a GPU-accelerated screen recorder in Rust with wgpu (opens in new tab)

I record a lot of product demos. Screen Studio on macOS made "smoothly zoom toward the cursor, then glide back" feel effortless. On Linux, where I live, nothing did it well. So I built the zoom engine myself in Rust, on top of wgpu. It now powers Screenix, a polished screen recorder for Linux (here is how it compares to Screen Studio). This post is the full writeup of the real engine, not a toy example. If you have ever wanted to do real-time GPU image processing in Rust, or you care about ho...