blocks|key|1254443|text|该页面使用excanvas+--一个使用IE的VML渲染器模拟canvas元素的JS库。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1254444|请注意，在Internet+Explorer9中，the+canvas+tag+is+supported+natively！有关详细信息，请参阅MSDN+docs+...|1254445|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/explorercanvas/|1|http://msdn.microsoft.com/en-us/ie/hh410106#_HTML5_canvas|2|http://msdn.microsoft.com/library/ff975062.aspx^0|5|8|0|0|P|10|1|20|9|2|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]|$A|Z|B|10|1|11]]|C|$]]|$1|F|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]|P|$5|I|J|K|C|$L|Q]]]]

The page is using <a href="http://code.google.com/p/explorercanvas/" rel="noreferrer">excanvas</a> - a JS library that simulates the canvas element using IE's VML renderer.

Note that in Internet Explorer 9, <a href="http://msdn.microsoft.com/en-us/ie/hh410106#_HTML5_canvas" rel="noreferrer">the canvas tag is supported natively</a>! See <a href="http://msdn.microsoft.com/library/ff975062.aspx" rel="noreferrer">MSDN docs</a> for details...

blocks|key|1469157|text|你可以为IE使用新发布的Chrome+Frame插件，但它要求HTML5网站包含启用该插件的特殊meta标签。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1469158|http://code.google.com/chrome/chromeframe/|offset|length|1469159|Chrome+Frame似乎使用了Explore+Canvas+(excanvas.js)。|1469160|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|16|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

You could use the newly released Chrome Frame plugin for IE, but it requires that the HTML 5 website includes the special meta tag that enables the plugin.

<a href="http://code.google.com/chrome/chromeframe/" rel="nofollow noreferrer">http://code.google.com/chrome/chromeframe/</a>

Chrome Frame seems to use Explore Canvas (excanvas.js).

blocks|key|1254563|text|目前，ExplorerCanvas是为IE6、7和8模拟HTML5+canvas的唯一选择。您对其性能的判断也是对的，它的性能相当差。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1254564|我发现了一个粒子模拟器，可以对Google+Chrome、Safari和Firefox中真正的HTML5画布处理与IE中的ExplorerCanvas进行基准测试。结果表明，支持canvas标签的主要浏览器的运行速度比使用ExplorerCanvas的IE中的模拟HTML5快20到30倍。|1254565|我怀疑任何人都会努力创建一个替代方案，因为1)+excanvas.js的代码尽可能简洁，2)当IE9发布时，所有主要的浏览器都将最终支持canvas对象。希望我们能在一年内得到IE9|1254566|邮箱:+Eric+@+www.webkrunk.com|1254567|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Currently, ExplorerCanvas is the only option to emulate HTML5 canvas for IE6, 7, and 8. You're also right about its performance, which is pretty poor. 

I found a particle simulatior that benchmarks the difference between true HTML5 canvas handling in Google Chrome, Safari, and Firefox, vs ExplorerCanvas in IE. The results show that the major browsers that do support the canvas tag run about 20 to 30 times faster than the emulated HTML5 in IE with ExplorerCanvas.

I doubt that anyone will go through the effort of creating an alternative because 1) excanvas.js is about as cleanly coded as it gets and 2) when IE9 is released all of the major browsers will finally support the canvas object. Hopefully, We'll get IE9 within a year

Eric @ www.webkrunk.com

blocks|key|1469257|text|你可以试试fxCanvas：https://code.google.com/p/fxcanvas/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1469258|它在flash+shim中实现了几乎所有的Canvas+API。|1469259|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/fxcanvas/^0|E|Z|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

You can try fxCanvas: <a href="https://code.google.com/p/fxcanvas/" rel="nofollow noreferrer">https://code.google.com/p/fxcanvas/</a>

It implements almost all Canvas API within flash shim.

blocks|key|1469289|text|我刚刚使用了flashcanvas，并且我让它工作了。如果您遇到问题，请务必阅读警告和诸如此类的内容。特别是，如果您动态创建画布元素，则需要显式地初始化它们：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1469290|if+(typeof+FlashCanvas+!=+"undefined")+{
++++FlashCanvas.initElement(canvas);
}|code-block|syntax|javascript|1469291|entityMap|0|LINK|mutability|MUTABLE|url|http://flashcanvas.net/^0|6|B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

I just used <a href="http://flashcanvas.net" rel="nofollow">flashcanvas</a>, and I got that working. If you encounter problems, just make sure to read the caveats and whatnot. Particularly, if you create canvas elements dynamically, you need to initialize them explicitly:

<pre><code>if (typeof FlashCanvas != "undefined") {
 FlashCanvas.initElement(canvas);
}
</code></pre>

I am trying to use the HTML5 canvas element to draw some arcs and circles - this works perfectly in FF but IE8 does not seem to support it.

Now, there exist Javascript libraries which seem to make IE8 work well with Canvas. <a href="http://thejit.org/static/v20/Jit/Examples/Hypertree/example1.html" rel="noreferrer">An example can be found here</a>.

I have read their entire source but I cannot understand how they are making Canvas work with IE8. Can somebody please throw some light on the method used?

How can I use the HTML5 canvas element in IE?

我正在尝试使用HTML5画布元素来绘制一些圆弧和圆-这在FF中工作得很好，但是IE8似乎不支持它。现在，有一些Javascript库似乎可以让IE8与Canvas很好地协同工作。。我已经阅读了他们的全部源代码，但我不明白他们是如何让Canvas与IE8一起工作的。有没有人能解释一下所用的方法？

问如何在IE中使用HTML5 canvas元素？
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