WASM + WebGL texture flag trick enables fast per-pixel updates in browser
YishengJiang · x · 2026-09-04
Replying to a question about his in-browser demo, yacineMTB confirmed it runs on WASM and shared the key implementation detail: a specific WebGL texture flag allows updating just one pixel at a time, making updates much faster than re-uploading the whole texture.
The trick is useful for any browser-based app that needs high-frequency updates to small regions — live previews, simulators, or agent visualization panels.
Related event: Dev Demonstrates Pure C Running in the Browser via WASM(4 posts)→
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