目前flash矢量图形到html5的转换，一般有两种方式： 1.转换为位图，例如：png，jpg。 2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。 LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点……
目前flash矢量图形到html5的转换，一般有两种方式：
1.转换为位图，例如：png，jpg。
2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。
方式1渲染速度快，但是无法自适应各种屏幕分辨率，如果按大屏分辨率保存矢量图形，则占用空间大，如果按小屏分辨率保存矢量图形，则在大屏上浏览时，图形模糊或者马赛克效应严重。如果一个矢量图形在游戏中有缩放行为，由于图像是按固定分辨率保存的，所以无法做到清晰缩放。而且位图格式相比矢量格式占用空间巨大，下载到客户端消耗的流量也就大很多。
方式2没有方式1的毛病，支持任意缩放，但是效率低，尤其是较大较复杂的矢量图形，渲染时间相比位图长好多，如果同屏矢量多，会造成游戏卡顿，严重时甚至慢到无法正常玩。
LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点。
看看这个例子：逃出发明家的房子，点击图形可运行。
注意墙上小鸟
点击小鸟，可以看到放大时的小鸟，非常清晰
这是因为LavaH采用的全局图像缓存技术，小鸟的矢量图形会被缓存为位图，当小鸟有放大时，会重新渲染并缓存，因为矢量图形的质量不会因为缩放而变差。
博文最后更新时间：
评论
发表评论
个人资料
姓名：李杰。
爱好：编程，慢跑。
2001年来北京发展，从事软件开发17年。
文曲星Lava语言的创造者。
Iava&LavaX跨平台语言的发明者。
Mirage引擎之父。
手机拳皇97高清版主程序。
It's a bad line http://tuberating.online/wifelovers.html voyeurweb One user, SmethwickBelle, writes: “I'd say there are others more worthy of your ire; may I suggest the apple crunchers, yoghurt slurpers, banana munchers, snorers, coughers, sniffers and my least favourite, the CRISP EATERS. At least applying yoghurt doesn't make an irritating noise or a smell.”
Can I call you back? http://tubeadvisor.online/freeones.html lobstertube Selly's two looks raise some interesting questions: are you going to cop her reasonably priced style? Is Forever 21 her favorite store? What F21 item will she wear next? And, finally (and most importantly), could Selena be any more like us?
I'm sorry, I'm not interested https://beeg.x.fc2.com/ sextube In February, North Korea set an immediate challenge to incoming South Korean President Park Geun-hye by staging its third nuclear test in response to stricter sanctions imposed by the United Nations after a long-range missile test by the North.
Canada>Canada https://beeg.x.fc2.com/wifelovers.html lamalinks Despite his plans to purchase more imported wheat andincrease local production, Abu Shadi did not reveal any parallelplans to clamp down on waste and losses in the supply systemthat could help to plug a budget deficit that has balloonedsince the 2011 uprising.
The manager https://beeg.x.fc2.com/fatmomtube.html fatmomtube Majority Leader Eric Cantor, the driving force behind the legislation, said it was "wrong for working, middle-class people to pay" for abuse of the program, whose costs have skyrocketed in recent years.
Sorry, I ran out of credit https://beeg.x.fc2.com/ampland.html myvidster "It may be politically embarrassing," said Maya Lester, aLondon-based lawyer who represents companies and individuals inlitigation concerning European sanctions, including the Iraniancentral bank and the country's main tanker company, NITC.