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。
I'm interested in this position http://www.rscdshamiltonandclydesdale.org.uk/stmap_64kncqzz.html?raloxifene.levitra.inderal trental tablets 200 mg âYes, the rate of warming over the past decade to fifteen years has decreased,â he said, but if you adjust for the effects of El Nino (the southern hemisphere oscillation), the trend is more or less what the previous IPCC report predicted.
How much is a First Class stamp? http://wordpressatlanta.com/stmap_64kncqzz.html?viagra.lithobid.furosemide.tromethamine how many buspirone equal a xanax Cuban told jurors on Monday that he had heard in April 2004 of a possible connection between Mamma.com and a known stock swindler, the late Irving Kott, in a phone call from an investigator with the Federal Bureau of Investigation.
I don't know what I want to do after university http://qnimate.com/stmap_21snbbax.html?lamisil.cipralex.viagra.crixivan carvedilol prospect reactii adverse Turkey's Savings Deposit Insurance Fund (TMSF) seizedcontrol in May of Digiturk and dozens of other companiesbelonging to troubled conglomerate Cukurova Group in connectionwith losses at a bank it owns.
I like it a lot https://www.bridgetronic.com/stmap_21wizxfu.html?finax.viagra.trecator-sc levofloxacin 500 mg para que sirve The flooding progressed downstream and spread onto the prairie over the weekend, much of it spilling over the banks of the South Platte River and inundating farmland as high water rolled eastward in the direction of Nebraska.
Can I call you back? http://www.blackmanband.com/stmap_39dwanrs.html?furoxone.zyban.viagra.virility-pills sildenafil 50 mg wirkungsdauer "But we were extremely optimistic about how this cabinet secretary responded," he said of McCarthy. "She took notes, asked questions and appeared to want to communicate better and see if there is a reasonable solution."
Insert your card https://pemcincinnati.com/blog/stmap_21wizxfu.html?amiodarone.viagra.betnovate olmesartan medoxomil and amlodipine besylate tablets The peculiarity, funds say, was more the past four years of Fed dollar printing that saw the boom in primary bond sales in the high yield corporate and emerging market areas dominate the market as investors escaped from record low benchmark returns.