Take a look at SDL_draw. This library draws on an SDL surface, but you should be able to easily adapt it to draw on the screen of your embedded device. The license is GPL, not sure if that works for you.
openCV might be worth a look. It's more designed for manipulating and diagnosing images rather than to draw them yourself from scratch, but it's open-source, and fairly easy to use.
It's quite fast, so an extra point for embedded systems.
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查看 SDL_draw。该库在 SDL 表面上绘制，但您应该能够轻松地调整它以在您的屏幕上绘制嵌入式设备。许可证是 GPL，不确定这是否适合您。
Take a look at SDL_draw. This library draws on an SDL surface, but you should be able to easily adapt it to draw on the screen of your embedded device. The license is GPL, not sure if that works for you.
我在嵌入式设备中使用了Cairo 图形库。不过我们并不太担心记忆力。
I've used the Cairo graphics library in an embedded device. We weren't too worried about memory though.
我不知道它与您来自的地方相比如何，但 allegro（主要用于游戏）是免费、简单且得到良好支持的：
http://www.talula.demon.co.uk/allegro/
编辑：我错过了嵌入部分。我怀疑你想要快板。对不起。
I don't know how it compares to where you come from, but allegro (mostly for games) is free, easy, and pretty well-supported:
http://www.talula.demon.co.uk/allegro/
Edit: I missed the embedded part. I doubt you want allegro then. Sorry.
openCV 可能值得一看。它更适合操作和诊断图像，而不是自己从头开始绘制图像，但它是开源的，并且相当易于使用。
它的速度相当快，因此对于嵌入式系统来说是一个额外的优点。
openCV might be worth a look. It's more designed for manipulating and diagnosing images rather than to draw them yourself from scratch, but it's open-source, and fairly easy to use.
It's quite fast, so an extra point for embedded systems.