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Race The Beam Renderer

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Raph Levien builds JIT renderer for proportional bitmap fonts on RP2350 chips

Developer Raph Levien has described a new technique for rendering proportional, kerned bitmap text at high speed on microcontrollers like the RP2350, built for his vic-2350 project that reimagines an 1980s home computer. The method generates optimized machine code on the fly for each string using a just-in-time compiler, avoiding the fixed-character-cell limitations common in microcontroller text rendering. Levien says the approach integrates with his 'race-the-beam' renderer but would also work for writing to a standard framebuffer.