如何在node.js服务器中实现-toDataURL()函数? [英] How to implement -toDataURL() function in node.js server?

问题描述

我是一个使用webgl实现作为我项目的依赖模块的新手.我正在尝试在服务器端使用node-webgl包装器使用.toDataURL()函数.但是我遇到了一个错误站.toDataURL()是未定义的.有关更多详细信息，请查看以下链接:

I am a newbie using webgl implementation as a dependent module for my project. I am trying to use .toDataURL() function using node-webgl wrapper at server side. But I get an error station .toDataURL() is undefined. For more detail, please have a look at this link: canvas.toDataURL() is not a function - error node-webGL wrapper

目前的帖子肯定不是重复的.在帖子中(共享以前的链接)，我试图找到一种替代方法来访问canvas的数据.本篇文章的目标是实现.toDataURL()函数.我是这些webgl的新手.您能否分享一些有关如何实现此小功能的链接或过程.还是可以访问浏览器实现的相同功能(在此处复制)，在哪里可以得到?

Well the current post is definitely not a duplicate. In the post(earlier link shared) I am trying to find an alternative way to access the data of canvas. The goal of this current post is to implement the .toDataURL() function. I am novice in these webgl. Could you please share some links or procedure on how to implement this small function. or Could I access the same function of browser implementation(copy it here), where can I get that?

任何建议肯定会有所帮助.

Any suggestions will definitely be helpful.

谢谢.

推荐答案

数据URI包括:

data:[<media type>][;base64],<data>

您需要做的就是连接:

1. 字符串"data:"
2. 一种媒体类型-例如"image/jpeg"
3. 字符串";base64,"
4. 数据的Base64表示形式

1. a string "data:"
2. a media type - e.g. "image/jpeg"
3. a string ";base64,"
4. Base64 representation of your data

有关更多信息，请参见:

For more info see:

• https://en.wikipedia.org/wiki/Data_URI_scheme
• https://en.wikipedia.org/wiki/Base64

• https://en.wikipedia.org/wiki/Data_URI_scheme
• https://en.wikipedia.org/wiki/Base64

npm上有几个模块可以帮助您生成Base64:

There are several modules on npm that can help you generate Base64:

• https://www.npmjs.com/search?q=base64

基本上，这是实现toDataURL()功能所需的所有知识.

This is basically everything that you need to know to implement toDataURL() function.

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