在javascript中将png/jpg转换为.ico

本文介绍了在javascript中将png/jpg转换为.ico的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

所以我想要一个可以从jpg/png生成 .ico 文件的工具.我使用以下代码从画布上生成了jpg:

So i want a tool that generates a .ico file from a jpg/png. I have generated the jpg from a canvas using this code:

var img = c.toDataURL("image/png"); document.write('<img src="'+img+'"/>');

从这张画布上提取的是

<canvas id="myCanvas" width="16" height="16">

问题在于；是否可以将生成的png转换为ico?

So the qustion is; is it possible to convert the generated png to a ico?

推荐答案

在Firefox中，您可以直接从画布上完成此操作:

In Firefox you can do this directly from canvas:

// Make ICO files (Firefox only) var ctx = c.getContext("2d"); ctx.arc(c.width>>1, c.height>>1, c.width>>1, 0, 6.28); ctx.fill(); c.toBlob(function(blob) { console.log(blob) }, 'image/vnd.microsoft.icon', '-moz-parse-options:format=bmp;bpp=32');

<canvas id=c width=32 height=32></canvas>

否则，要支持其他浏览器，您将必须手动构建ico文件.请参见格式说明，例如，有关如何操作的答案.

otherwise, to support other browsers you will have to build the ico file manually. See format description and for example this answer on how you can do that.