Javascript 我应该使用哪个库来处理 Node.JS 上的服务器端图像？
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Which library should I use for server-side image manipulation on Node.JS?
提问by Andrew Андрей Листочкин
I found a quite large list of available librarieson Node.JS wiki but I'm not sure which of those are more mature and provide better performance. Basically I want to do the following:
我在 Node.JS wiki 上找到了相当多的可用库列表，但我不确定其中哪些更成熟并提供更好的性能。基本上我想做以下事情：
- load some images to a server from external sources
- put them onto one big canvas
- crop and mask them a bit
- apply a filter or two
- Resize the final image and give a link to it
- 从外部资源加载一些图像到服务器
- 把它们放在一张大画布上
- 裁剪并稍微掩盖它们
- 应用一两个过滤器
- 调整最终图像的大小并提供链接
Big plus if the node package works on both Linux and Windows.
如果 node 包在 Linux和 Windows上都可以工作，那么大加分。
回答by Andrew Андрей Листочкин
Answering my own question
回答我自己的问题
I spent two days digging through Node.js graphics libraries.
我花了两天时间研究 Node.js 图形库。
- I tried it first since I'm quite familiar with
<canvas>API. It's a huge plus for a library. - it requires Cairo which doesn't have an easy Windows download. I found it in GTK+ distribution though.
- moreover it needs native library binding code to be compiled on module installation. It uses Node-Waf which hasn't being ported to Windows yet.
- 我首先尝试了它，因为我对
<canvas>API非常熟悉。这对图书馆来说是一个巨大的优势。 - 它需要没有简单的 Windows 下载的开罗。我在 GTK+ 发行版中找到了它。
- 此外，它需要在模块安装时编译本机库绑定代码。它使用尚未移植到 Windows 的 Node-Waf。
- mature
- runs on Windows smoothly
- docs are okbut not thorough: I had to look up into source code to figure out what API is available
- unfortunately there's no easy way to combine images with gm. Maybe there's some way to achieve that but I haven't found one after two hours spent with it.
- 成熟
- 在 Windows 上流畅运行
- 文档是好的，但不彻底：我不得不寻找到源代码，以弄清楚什么API可用
- 不幸的是，没有简单的方法将图像与 gm 结合起来。也许有某种方法可以实现这一目标，但在花了两个小时之后我还没有找到。
- The official repo has very few basic ImageMagick commands covered but I used this fork(good thing that NPM can pull libraries directly from git repositories). It has bindings for
montagewhich does exactly what I need. - ImageMagick is quite slow, though it works on Windows.
- 官方存储库几乎没有涵盖基本的 ImageMagick 命令，但我使用了这个 fork（NPM 可以直接从 git 存储库中提取库）。它具有
montage完全符合我需要的绑定。 - ImageMagick 速度很慢，但它可以在 Windows 上运行。
- Huge plus: it uses an incredible VIPS librarywhich I'm familiar with. VIPS is very fast and optimized for large images. It's very smart about utilizing hardware resources: if your machine has a lot of RAM it'll do all processing in memory but will switch to hard-drive caches if memory is scarce or required for other applications.
- same as node-canvas it requires Node-Waf so it's not available for Windows yet.
- 巨大的优势：它使用了一个我熟悉的令人难以置信的VIPS 库。VIPS 速度非常快，并且针对大图像进行了优化。利用硬件资源非常聪明：如果您的机器有大量 RAM，它将在内存中完成所有处理，但如果内存不足或其他应用程序需要内存，则会切换到硬盘缓存。
- 与 node-canvas 一样，它需要 Node-Waf，所以它目前不适用于 Windows。
I also looked at other libraries from the list but most of them are either very immature or do not suit my use case. I would really like to try migrating to either Node-Canvas or Node-Vips when Node-Waf gets ported to Windows but until then I'll stick to node-imagemagick.
我还查看了列表中的其他库，但其中大多数要么非常不成熟，要么不适合我的用例。当 Node-Waf 被移植到 Windows 时，我真的很想尝试迁移到 Node-Canvas 或 Node-Vips，但在那之前我会坚持使用 node-imagemagick。
