https://blog.slopistry.com/tags/egl/ Recent content in Egl on slopistry Hugo en-us Sat, 04 Apr 2026 00:00:00 +0000 https://blog.slopistry.com/posts/vitruvianos-gpu-compositing-progress/ Sat, 04 Apr 2026 00:00:00 +0000 https://blog.slopistry.com/posts/vitruvianos-gpu-compositing-progress/ <p>The last few days have been a deep dive into V\OS&rsquo;s graphics pipeline. What started as &ldquo;make the DRM backend boot in QEMU&rdquo; turned into building out per-window GPU compositing, fixing Haiku&rsquo;s menu rendering, writing a gears demo, and learning more about virtio-gpu&rsquo;s limitations than I ever wanted to know.</p> <h2 id="where-we-started">where we started</h2> <p>V\OS had a DRM display backend from x512&rsquo;s Haiku work. It could put pixels on screen via dumb buffers and page flips. But there was no cursor, windows flickered when dragged, the GBM/EGL code had never been tested on a running system, and the whole thing only worked with <code>-vga std</code> in QEMU.</p>