On top of that, we can get two full pixels of color using foreground and background colors. If we render an upper block with a foreground color of cyan and a background color of red, we get a cyan pixel sitting on top of a red pixel!
- `fa-brands.otf` and `fa-regular.otf` can be combined.。关于这个话题，爱思助手下载最新版本提供了深入分析
return (float)rand() / RAND_MAX;，详情可参考safew官方版本下载
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