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。
Have you got a telephone directory? https://contraloria.bcs.gob.mx/stmap_18qnetae.html?levitra.sumatriptan.cytoxan pant minoxidil panvel Alfa has acheived 215bhp/tonne with the 4C's 237bhp 1.7-litre turbocharged engine, meaning a 0-62mph sprint time of 5.0 seconds and a top speed of 160mph. The engine is mated to the latest generation of Alfa's dry twin-clutch transmission. Up to 80 per cent of the car's 258lb/ft of torque is available from 1800rpm, something that Alfa says underlines the flexible nature of the new engine. Rumours still persist that a V6-engined option will also become available in the future. Alfa's DNA driver select system is also incorporated, and now also features a new 'race' mode.
Can I call you back? http://www.kodiakmetalworks.com/stmap_24wriwom.html?sleepwell.cialis.lioresal.isordil intimax oral jelly "It's kind of crazy," Webb, 24, told the Daily News. "A year ago I never would have imagined it. To be a part of the legacy and to know how nationally known the commercial is is so cool and so neat, I have trouble believing that it's me."
Go travelling http://allphotobangkok.com/stmap_24pkcjjq.html?labetalol.cialis.acillin.ondansetron hoodia max plus BlackBerryâs saving grace has been its strong enterprise and government credentials, but putting aside anything to do with security or privacy on the platform, if you were an IT admin, would you be looking to roll out a fleet of £500 high-end handsets or that batch of £150 android devices? Exactly, its lack of a mid-range device isnât just hindering it in consumer, it could also potentially threaten BlackBerryâs survival as a handset maker to its core.
I work here https://pjreporters.com/stmap_24wriwom.html?carafate.cialis.dipivoxil aspirin oder ibuprofen gegen kater Z-Ben's Zhang estimates the fund, which offers investors variable returns, is on track to top 20 billion yuan in new capital by the end of this month. Tianhong will report the fund's assets under management by mid-October.
What university do you go to? https://www.canadabusinessdirectorylistings.com/stmap_24pkcjjq.html?ponstel.lincocin.levitra para que sirve meloxicam 7 5 mg Jordan has been concerned that al-Qaida-linked militants in Syria may use its territory as a haven as they escape attacks from the Syrian army. There is also concern that the militants may try to smuggle in weapons to use in attacks to destabilize the pro-U.S. kingdom, one of two Arabs states with a signed peace treaty with Israel.
It's OK http://www.dethstruck.com/stmap_18qnetae.html?mentat.cialis.famciclovir nolvadex and clomid pct dosage reddit Greenberg argued that voters are paying attention to "mayhem, gridlock and extremism in Washington," and many are blaming the GOP. He said that "By 64 to 30 percent, voters in Republican "battleground" districts' [where Greenberg considers GOP legislators to be vulnerable] off-year voters want their member to work with the president – up five points from October and 10 points from last summer."