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fanvas's Introduction

项目目前是存档状态,感谢您对腾讯开源项目的关注!您可以继续fork后更新迭代,感谢理解和支持;如果您有其他疑问,建议请发送邮件:[email protected] 与我们联系


什么是Fanvas?

Fanvas是一个把swf转为html5 canvas动画的系统,由两部分组成:Actionscript实现的解析器、js运行库。

Flash做动画是最成熟最高效的方式,但由于终端基本不支持Flash播放,这给终端的动画制作带来了不少麻烦。

Fanvas是Flash和Canvas的完美结合,可以把swf(包括矢量和位图)完美地转化为canvas动画,让美术妹子一次制作,到处运行。。。

嘿嘿~~~让美术妹子也搭上H5的快车。

Fanvas的技术难点?

1、兼容swf的各种格式,主要是各种矢量命令和多种多样的图片格式;

2、实现高效的html5运行库,自主实现了位图缓存、自动脏区识别、脏区重绘等技术。

Fanvas的优势?

能转化swf为H5动画的工具,除了Fanvas还有大名鼎鼎的google和adobe的产品——swiffy和flashcc。 对比之下,Fanvas有如下优势:

1、从swf文件直接转化为Html5动画(google的swiffy和adobe的flashcc都不支持,两个产品都需要通过fla源文件处理);

2、精简编排的JSON数据,使swf转化后的js数据文件非常小,普遍比flashcc导出的要小20%到50%;

3、精简的运行库,混淆后只有35k,gzip后只有10k左右。而swiffy和flashcc的运行库混淆后都超过100K;

4、开源,可供使用者二次开发(请保留Fanvas字样或版权声明)。

如何使用?

只需要一键导入swf,转化完成后一键导出canvas动画js。

具体请参考bin目录的《使用说明》

源代码说明

exporter是as3.0实现的swf文件解析器,解析后输出json数据;

runtime是js运行库,用于解析json数据,转化为最终canvas动画。

DEMO

http://kenkozheng.github.io/fanvas/magicEmotion/demo1/

http://kenkozheng.github.io/fanvas/magicEmotion/demo2/

http://kenkozheng.github.io/fanvas/magicEmotion/demo3/

http://kenkozheng.github.io/fanvas/magicEmotion/demo4/

fanvas's People

Contributors

iazrael avatar kenkofox avatar kenkozheng avatar tencent-adm avatar

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fanvas's Issues

导出data.js如何导出

看了使用说明,打开flashplayer_14_sa_debug.exe,导入swf文件,之后导出data.js,但是flashplayer没有导出的按钮,这个要如何导出

报错:Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0.

我用fanvas转换某个swf后,得到如下错误:
Uncaught DOMException: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0.
fanvas
错误定位到fanvas3-all.js的1263行代码的drawImage。使用如下方式可以规避问题:

cacheCanvas.width = cacheCanvas.width || 1;
cacheCanvas.height = cacheCanvas.height || 1;
ctx.drawImage(cacheCanvas, offX, offY, cacheCanvas.width/scale, cacheCanvas.height/scale);

能请问导致这个问题的原因是什么吗?

如何让导出的canvas动画透明?

有开发者提出,导出后的canvas动画默认使用了flash中的舞台颜色,如何实现透明,跟web其他元素叠加?

方法:
fanvas暂时没有加背景透明的配置,不过,大家可以在导出的swfData中,找到bgColor这个属性,删除或者设置为null,就能实现透明背景。
建议实际实现,可以在传入fanvas.play前,使用swfData.bgColor = null,这样的方式。

使用工具报错?

@kenkozheng

报错信息如下:

fanvas3-min.js:14 Uncaught TypeError: Failed to execute 'createPattern' on 'CanvasRenderingContext2D': The provided value is not of type '(HTMLImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap)'

按照项目中的Demo把script标签都放到了head标签中,同时写了定时器

查询错误之后发现可能是图片还没有加载结束就调用函数的原因,但是不知道该如何解决。求教

请问我可以认为 frameActionList 的长度就是动画的实际帧数吗?

UPDATE:
刚发现有这个: totalFrames 。

我想在动画播放结束后做一些操作,但目前没有对应的参数。唯一的回调就是 onFrame . 如果 frameActionList 的长度就是实际的总帧数,我就可以:

onFrame: function() {
  if (frame >= frameActionList.length) {
    // ...
  }
}

谢谢。

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