iiinova — where your digital self keeps evolving

Geolm @geolm.bsky.social · 09/10/2026

my new lib bc_packed is out! currently BC1 only, 1.47:1 average compression ratio, CPU/GPU parallel decompression (15300 MiB/s on my M5 Pro GPU), rice encoding with static rank tables. lossless and no dependencies! github.com/Geolm/bc_pac...

github.com

GitHub - Geolm/bc_packed: An asymmetric lossless compressor for already-compressed BC textures, designed for full GPU decompression.

An asymmetric lossless compressor for already-compressed BC textures, designed for full GPU decompression. - Geolm/bc_packed

020

Geolm @geolm.bsky.social · 06/10/2026

I'm about to archive my bc_crunch library as I will release soon its successor that focuses on high-speed decompression. Latest test gives 2650.8 MiB/s on CPU but the decoder is designed to run on the GPU. I hope I can share some GPU numbers soon...

120

Geolm @geolm.bsky.social · 25/09/2026

it's weird but somehow my native webgpu version of onedraw (github.com/Geolm/onedra...) is less popular than the Metal's one. Are you all on macOS? ;) By the way, I'm still adding some features (I'm guilty of having too many projects at the same time).

github.com

GitHub - Geolm/onedraw-webgpu: WebGPU tile-based 2d renderer with compute-driven binning and indirect draws

WebGPU tile-based 2d renderer with compute-driven binning and indirect draws - Geolm/onedraw-webgpu

010

Geolm @geolm.bsky.social · 14/06/2026

Forgot to mention: my GPU-driven 2D WebGPU renderer is now public: github.com/Geolm/onedra... Not an official release yet, but it's usable. One .c file to integrate, tested on Win32 and macOS. More features coming once the heat wave stops melting me.

github.com

GitHub - Geolm/onedraw-webgpu: WebGPU tile-based 2d renderer with compute-driven binning and indirect draws

WebGPU tile-based 2d renderer with compute-driven binning and indirect draws - Geolm/onedraw-webgpu

030

Reposted by Geolm

Markus Schütz @m-schuetz.bsky.social · 24/04/2026

New Paper🙂 Nanite has shown that small triangles can be rendered fast in compute, we're exploring how fast for large meshes with up to 18.9 billion triangles, without the need to precompute LOD structures. Paper: github.com/m-schuetz/Cu... Source: github.com/m-schuetz/Cu...

26820

Geolm @geolm.bsky.social · 31/03/2026

Some news about my WebGPU gpu-driven 2d port: The GPU binning phase is working, but there are still issues with culling, likely related to AABB tests. Debugging WebGPU in Xcode is a nightmare: a lot of passes unneeded, no way to inspect shader source or code easily, no stepping in shaders...

000

Geolm @geolm.bsky.social · 20/03/2026

I’m porting my 2D SDF GPU-driven renderer (onedraw) from Metal to the WebGPU API. A few observations so far: - Pure C API, no more Objective-C or metal-cpp 👍 - WGSL :( - A lot more boilerplate for bind group and pipeline setup - ~30 MB executable just to clear the backbuffer

011

Geolm @geolm.bsky.social · 23/01/2026

As people asked for better decompression speed in my bc_crunch lib, I started experimenting with Huffman coding. First results look promising: compression ratio is still better than zlib (~1.52:1) and decompression reaches ~144 MB/s. github.com/Geolm/bc_cru... (BC1 only for now)

github.com

GitHub - Geolm/bc_crunch at huffman

tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~1000 LoC) - GitHub - Geolm/bc_crunch at huffman

040

Geolm @geolm.bsky.social · 07/01/2026

I didn't had the luxury to work on my personal projects during the holidays season but here's a video of my attempt to animate my creature using position based dynamics (distance/angle/elbow constraint + ik).

010

Geolm @geolm.bsky.social · 12/12/2025

People kept asking me to compare bc_crunch with zlib, so I finally ran the tests. Overall, bc_crunch comes out ahead. More details are available on the GitHub page. bc_crunch BC1: 1.580368 vs zlib: 1.436144 bc_crunch BC4: 1.327702 vs zlib: 1.104125 I used miniz with the highest compression setting

010

Geolm @geolm.bsky.social · 10/12/2025

Hey, I thought I was done with bc_crunch, but I tried one last idea: Inter-channel differential coding. It works pretty well. The average compression ratio for BC1 went from 1.494:1 to 1.580:1, finally breaking the 1.5× barrier. It's already available here: github.com/Geolm/bc_cru...

github.com

GitHub - Geolm/bc_crunch: tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~800 LoC)

tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~800 LoC) - Geolm/bc_crunch

140

Reposted by Geolm

Walaber @walaber.com · 04/12/2025

Haven't done a camera analysis in a while! Here's a quick look at the camera for Metroid Dread 🎥

5437102

Geolm @geolm.bsky.social · 03/12/2025

Experimenting with a new control: a knob :) It should land in the public leanUI library soon. And yes, I’m working on a synth… stay tuned (pun intended).

100

Geolm @geolm.bsky.social · 27/11/2025

Needed a simple way to spawn 2D objects (grass blades, stones, etc.) in composite shapes or along splines, so I wrote this: github.com/Geolm/spawn2d. It’s minimal, single-file, and easy to drop into any project.

github.com

GitHub - Geolm/spawn2d: Uniform sampling in combined shapes with overlap handling and distance constraints. (~300 LOC, C11)

Uniform sampling in combined shapes with overlap handling and distance constraints. (~300 LOC, C11) - Geolm/spawn2d

131

Geolm @geolm.bsky.social · 26/11/2025

Uniform Catmull–Rom spline sampling with disc collision and exclusion zones. Poisson-like, but curve-specific.

020

Geolm @geolm.bsky.social · 26/11/2025

Working on a uniform sampler with dynamic exclusion zones for procedural gen. Solid results so far, code release is possible once it’s cleaner.

010

Geolm @geolm.bsky.social · 21/11/2025

Just released a single-file C99 library to create MJPEG AVI videos from an RGBA framebuffer. github.com/Geolm/mjpegw Like jo_mpeg, but MJPEG gives higher quality (larger files). • 3-function API • No dependencies • No audio • Plays in ffmpeg & VLC Huge thanks to Tiny-JPEG for the JPEG part.

github.com

GitHub - Geolm/mjpegw: Tiny C99 library for creating MJPEG AVI files. No external dependencies

Tiny C99 library for creating MJPEG AVI files. No external dependencies - Geolm/mjpegw

130

Geolm @geolm.bsky.social · 19/11/2025

Some optimizations news: NEON + decoder table in bc_crunch → decrunch ~1.5× faster, crunch ~1.3× faster. No plans for more performance tweaks right now, but I left some ideas in the README. Ping me if you want to chat about them!

100

Geolm @geolm.bsky.social · 18/11/2025

Hi everyone! Thanks for the interest in my library bc_crunch. Quick update: I’m currently working on optimizations. Two major bottlenecks have been identified, and fixes are on the way. I’ll share some performance numbers soon and add a profiling test to the repo.

020

Geolm @geolm.bsky.social · 15/11/2025

Just released bc_crunch: a tiny (~700 LOC), C99 library for lossless BC1/BC4/BC3/BC5 compression. One .c/.h pair, no deps, no malloc GPU-ready output Zigzag + delta + popcount/dictionary tricks Tested Perfect for games, procedural assets, streaming textures. github.com/Geolm/bc_cru...

github.com

GitHub - Geolm/bc_crunch: tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~700 LoC)

tiny dependency-free lossless compressor for BC/DXT texture streams (C99, ~700 LoC) - Geolm/bc_crunch

3408

Geolm @geolm.bsky.social · 12/11/2025

Hey everyone! I’m working on bc_crunch, a lossless BC1 (DXT) texture compressor/decompressor in C99 (~500 LOC, no dependencies). It compresses and decompresses textures bit-for-bit. Thinking of sharing it publicly, along with a doc on techniques tried—anyone interested?

000

Geolm @geolm.bsky.social · 07/11/2025

Big thanks to @flohofwoe.bsky.social for sokol_app — made it easy to keep github.com/Geolm/onedraw examples small and clean, no extra dependencies. Super smooth setup. Only thing I couldn’t find was a way to create sRGB backbuffer on macOS (did I miss that in the docs?).

github.com

GitHub - Geolm/onedraw: GPU driven 2d sdf renderer drop-in library

GPU driven 2d sdf renderer drop-in library. Contribute to Geolm/onedraw development by creating an account on GitHub.

171

Geolm @geolm.bsky.social · 04/11/2025

Excuse the coder art — this GIF shows the tile culling debug mode. Blue tiles are the ones that make it to the rasterizer. Notice how the interior of hollow shapes is efficiently skipped. You can have look at the code and documentation here: github.com/Geolm/onedraw

000

Geolm @geolm.bsky.social · 03/11/2025

Testing an approach to break a quadratic bezier into small SDFs: Blue: straight lines (oriented box SDF) Green: “pie” caps connecting lines Red: arcs Faster than a full bezier SDF, though tricky with large stroke widths. All done with my open-source GPU renderer github.com/Geolm/onedraw

240

Geolm @geolm.bsky.social · 03/11/2025

Hello everyone, I wrote an extensive documentation on the GPU‑driven 2D renderer I’ve been working on. Check out the overview here: github.com/Geolm/onedra... If you're interested, here's the repo URL: github.com/Geolm/onedraw #GPU #2DGraphics #OpenSource #Metal #Rendering

160

Geolm @geolm.bsky.social · 01/11/2025

Calling macOS (Apple Silicon) devs Looking for early testers for onedraw, my GPU-driven 2D renderer built with Metal. Feedback before release would be super appreciated 🙏 github.com/Geolm/onedraw #Metal #GPUDriven

github.com

000

Geolm @geolm.bsky.social · 24/10/2025

Another test for my upcoming 2D GPU-driven renderer: 5000 oriented, rounded boxes with transparency. All alpha blending is computed in-shader. Everything on screen (UI, text, shapes, etc.) is drawn in a single pass, writing only opaque pixels. 1440p @ 5.43 ms on an M1 Pro #Metal #Rendering #SDF

030

Geolm @geolm.bsky.social · 22/10/2025

Testing the smoothmin operator (iquilezles.org/articles/smin) in my 2D GPU-driven renderer. Performance takes a small hit, but the k-value has to be considered for binning — high k lets circles blend even when they don’t touch.

100

Geolm @geolm.bsky.social · 15/10/2025

Just released a side-quest project: leanUI — a super-lightweight, dependency-free immediate-mode UI library in C99. Animated widgets and sleak design github.com/Geolm/leanUI #C99 #gamedev #opensource #UI #leanUI

2193

Geolm @geolm.bsky.social · 03/03/2025

Few months ago I've started a hobby project : a 2d sdf editor. I wanted to sculpt a sdf without writting shader code. It's still the very beginning but you can have a look at the github page github.com/Geolm/Toodee... I'll try to post videos and screenshots in the future

github.com

GitHub - Geolm/ToodeeSculpt: a 2D sdf combiner editor

a 2D sdf combiner editor. Contribute to Geolm/ToodeeSculpt development by creating an account on GitHub.

000