Raph Levien's JIT bitmap text rendering for the RP2350 microcontroller
What happened
Raph Levien's vic-2350 project on the RP2350 microcontroller generates optimized rendering code per string, using a race-the-beam scanline fill at about 6 cycles per pixel. The renderer is written in his own symbolasm language. To limit memory pressure from double buffering, text objects in the display list store only the string, a font pointer and foreground and background colors.
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- Hacker News front pageJIT bitmap text rendering for microcontrollers
Raph Levien 在 RP2350 微控制器项目 vic-2350 中提出一种 JIT 位图文字渲染技术，为每个字符串动态生成高度优化的渲染代码。该方案采用逐扫描线填充的 race-the-beam 方式，每像素预算约 6 个周期，渲染器用其自创的 symbolasm 语言编写。文字对象在显示列表中仅存字符串、字体指针和前景/背景色，以控制双缓冲带来的内存压力。
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