Bitmap.SetPixel（X，Y，颜色）太慢 [英] Bitmap.SetPixel(x,y, Color) too slow

问题描述

所以，目前我创建一个1000×1000的位图，它的支出约0.3秒简单地调用Bitmap.SetPixel（）函数。

So currently I'm creating a 1000x1000 bitmap and it's spending about .3 seconds simply calling the Bitmap.SetPixel() function.

实际上，我只画大概50％的像素，因此它更像是500000呼叫setpixel。虽然这似乎想了很多电话，OTOH视频游戏做了很多更，推动许多许多像素（其中一些procedureally生成）。

I'm actually only drawing probably 50% of the pixels so it's more like 500,000 call to setpixel. While that does seem like a lot of calls, OTOH video games are do alot more and push many many more pixels (some of them procedureally generated).

显然Bitmap.SetPixel速度不是最优化的，但如果我需要更新的位图20-30次，第二次拿到像样的动画，这是方法要慢，所以我有哪些选择？

Obviously Bitmap.SetPixel isn't optimized for speed, but if I needed to update a bitmap 20-30 times a second to get decent animation, this is way to slow, so what are my options?

推荐答案

鲍勃·鲍威尔拥有一支优秀的教程有关访问像素直接映射到内存中。

Bob Powell has an excellent tutorial on accessing pixel maps directly in memory.

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