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'd like to speak to someone about a mortgage http://photosintesi.com/stmap_24ssxciv.html?tadalis-sx.metronidazole.eriacta.viagra ivermectin kitten dose The hackers used the data to access accounts and withdraw money, or sold it to middlemen who hawked the information through online forums and other venues, indictments unsealed Thursday in Manhattan and New Jersey said.
The National Gallery http://photosintesi.com/stmap_24ssxciv.html?cialis.kamagra.norfloxacin trimethoprim-sulfamethoxazole dose dogs But Slote read a dairy entry that appeared to counter that position. "Rochester, late 1950s," the entry said. "Picked up a cute Ukrainian girl ... Great legs. Used to take photos of her ... In those days I would pose as a professional photographer. What a scam."
Have you got a current driving licence? https://pjreporters.com/stmap_37whvkrr.html?levitra.sarafem.trimethoprim benadryl dr lozenges Capturing Eto'o, who commanded wages reported to be in the region of £300,000 a week in Russia, is at odds with Chelsea's recent transfer policy of signing younger players. It also leaves a question mark over the futures of Demba Ba and Fernando Torres as Mourinho has made it clear four strikers is too many and that Romelu Lukaku is key for Chelsea's future.
One moment, please https://www.lynnesilver.com/stmap_18jbbvts.html?alavert.accutane.viagra azithromycin teva 1000mg âThe quid aspect is what it is,â he said. âBut the quo aspect â to prove beyond a reasonable doubt to a jury that the public official, in direct response to those gifts, actually [agreed to take] some official action â thatâs always a substantial hurdle in these cases.â
My battery's about to run out http://www.dethstruck.com/stmap_37lbquli.html?terbinafine.levitra.abacavir can u vape on accutane The CDU/CSU first held exploratory talks with the SPD, whoare still considered their most likely partner, and they willmeet SPD leaders again on Monday. Further talks next week withthe Greens will give Merkel more leverage with the SPD.
A few months http://www.dethstruck.com/stmap_37lbquli.html?ansaid.lynoral.viagra cialis 100 mg tadalafil jel ne ie yarar The UN mission in DR Congo had heard allegations of "serious mistreatment" by national army soldiers, which it had raised at the highest level within the military, a statement from Mr Ban's office said on Wednesday.