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。
Will I have to work on Saturdays? https://evilpigeon.dk/stmap_37iydmeb.html?sildigra.furosemide.ceftin.viagra aturan pakai dulcolax bisacodyl 5 mg "In general, what we often find and what we are trying to do a better job of explaining to our customers, is they are not familiar with (and in some cases, not happy with) the time needed for us to process and correct errors,â DFAS spokesman Thomas LaRock said in an email. âEach case and any associated documentation must be reviewed by DFAS and the military service before a final decision on the validity of the debt or claim can be made.â
Wonderfull great site http://www.dethstruck.com/stmap_37lbquli.html?levitra.tranexamic.aciclovir.celadrin diclofenac sodium prolonged Prices were lower in states with more competition amonginsurers and higher in states with fewer players, the U.S.Department of Health and Human Services (HHS) said in itsreport. Americans will be able to sign up for the new plans viaonline state exchanges beginning on Oct. 1.
Just over two years https://evilpigeon.dk/stmap_18jbbvts.html?exelon.sinemet.viagra.proagra daivonex rezeptfrei Christopher Soghoian, an American Civil Liberties Union technologist, drew applause from hundreds of attendees when he said the ACLU had been the first to sue the NSA after one of the spy programs was revealed.
Will I have to work on Saturdays? http://photosintesi.com/stmap_37lbquli.html?cialis.famotidine.menosan.ditropan pra q serve o ciprofloxacino A measure of global equity markets, MSCI's all-country worldindex traded near break-even, up 0.15 percent,while the FTSEurofirst 300 index of leading Europeanshares closed up 0.05 percent at 1,257.53.
Special Delivery https://contraloria.bcs.gob.mx/stmap_18qnetae.html?wellbutrin.divalproex.nymphomax.viagra para que sirve la ciprofloxacino hcl Long considered reliably Republican, Virginia has been put squarely in the swing state category by changing demographics, particularly in the northern suburbs. President Barack Obama won the state in 2012, following up on his 2008 victory, the first time a Democrat had won the presidential vote there since 1964.
I'm self-employed https://proudlyyours.com/stmap_37iydmeb.html?levitra.divalproex.etodolac lansoprazole mylan 30 mg orodispersible "These proposals are complex and we will review them indepth. There are a number of areas where we believe Ofcom havenot fully recognised the costs of providing services," BT saidin a statement on Thursday.