ImageMagick 与 Cairo 关于矢量图形光栅化的比较
我正在开发一个项目，需要将绘图光栅化为图像文件。我已经使用 GDI+ 让它工作了。想要创建一个便携式解决方案，我也在研究其他解决方案并发现了两个 - cairo 和 imagemagick。我对两者都很陌生，但 ImageMagick 似乎可以做几乎所有的事情 - 绘制线条、弧线、圆形、文本等......以及许多位图操作。
然而，开罗在网站中被称为 GDI+ 的竞争对手。 ImageMagick 从未被提及用于此目的。
我没有时间投资这两个图书馆。我需要决定哪一个值得。 我更喜欢 ImageMagick，因为它看起来更强大。
您对这两个图形库有何看法？
I am working on a project that needs rasterizing of drawings into image files. I have already got it work using GDI+. Wanting to create a portable solution, I am also looking into other solutions and found two - cairo and imagemagick. I am new to both, but it seems that ImageMagick can do almost all the stuff - drawing lines, arcs, circles, text etc.. plus many bitmap manipulation.
However, Cairo is mentioned as competitor to GDI+ in web sites. ImageMagick is never mentioned for this purpose.
I do not have time to invest on both libraries. I need to decide which one is worthy.
I prefer to ImageMagick, as it seems much more powerful.
What's your opinion on the two graphic libs?
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Cairo 本身在位图操作方面不能做太多事情 - 至少在 ImageMagick 可以的意义上是这样。然而，它是一个非常强大的矢量图像库，并且几乎可以完成 GDI+ 可以完成的所有任务，甚至可以说它实际上是 DirectDraw 2D 的合适替代品。它还可以生成和使用位图图像，并直接支持PNG图像格式。
另一方面，ImageMagick 是一个位图图像库。与 Cairo 相比，它较少关注矢量图形，而是直接生成矢量图形的位图表示。另一方面，它还可以完成很多 Cairo 本身无法完成的工作，包括文本光栅化； IM 还支持几乎所有人类已知的图像格式，并且可以相对轻松地导入和导出它们。
如果您需要制作可缩放矢量图形，请使用 Cairo。
如果您要输出位图或光栅格式，请使用 ImageMagick。
Cairo by itself can't do very much in the way of bitmap manipulation - at least in the sense that ImageMagick can. It is, however, a very powerful vector imaging library, and can do almost everything that GDI+ can do, up to the point where it's practically a suitable replacement for DirectDraw 2D. It can also produce and use bitmap images, and directly supports the PNG image format.
ImageMagick, on the other hand, is a bitmap image library. It has less of a focus on vector graphics than Cairo does, and instead directly produces bitmap representations of vector shapes. On the other hand, it also does a lot Cairo can't do natively, including text rasterization; IM also supports virtually every image format known to Man, and can import and export them with relative ease.
Use Cairo if you need to do scalable vector graphics.
Use ImageMagick if you are ouputting to bitmap or raster formats.