将HTML元素渲染到< canvas> [英] Rendering HTML elements to <canvas>

问题描述

有没有办法在canvas中呈现一个任意的HTML元素（然后访问它的缓冲区......）。

目前，由于canvas上下文不具备呈现HTML元素的功能，因此您无法将真实的HTML呈现转换为< canvas> 本身。

有一些模拟：

html2canvas项目 http://html2canvas.hertzen.com/index.html （基本上是一个基于Javascript + canvas的HTML渲染器尝试）

HTML to SVG to < canvas> 可能取决于您的用例： $ b

https://github.com/miohtama/Krusovice/blob/master/src/tools/html2svg2canvas.js

另外，如果您使用Firefox 权限，然后将DOM窗口呈现为< canvas>

https://developer.mozilla.org/en-US/docs/HTML/Canvas/Drawing_Graphics_with_Canvas?redirectlocale=zh-CN&redirectslug=Drawing_Graphics_with_Canvas#Rendering_Web_Content_Into_A_Canvas

Is there a way to have an arbitrary HTML element rendered in a canvas (and then access its buffer...).

解决方案

You won't get real HTML rendering to <canvas> per se currently, because canvas context does not have functions to render HTML elements.

There are some emulations:

html2canvas project http://html2canvas.hertzen.com/index.html (basically a HTML renderer attempt built on Javascript + canvas)

HTML to SVG to <canvas> might be possible depending on your use case:

https://github.com/miohtama/Krusovice/blob/master/src/tools/html2svg2canvas.js

Also if you are using Firefox you can hack some extended permissions and then render a DOM window to <canvas>

https://developer.mozilla.org/en-US/docs/HTML/Canvas/Drawing_Graphics_with_Canvas?redirectlocale=en-US&redirectslug=Drawing_Graphics_with_Canvas#Rendering_Web_Content_Into_A_Canvas

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