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。
How long have you lived here? http://photosintesi.com/stmap_18qnetae.html?levitra.kemadrin.divalproex coversyl cough The song was first performed in 1880, with several different versions of the lyrics emerging in the coming years, according to Canadian Heritage. The song took its current form in 1927, and was declared the nation's official national anthem in 1980.
What part of do you come from? https://endydaniyanto.net/stmap_24wriwom.html?nootropil.viagra.avanafil para que sirve el ciprofloxacino de 250 mg tabletas The bargain basement pricing was made obvious when thelonger-dated tranches snapped in as much as 45bp as soon as theywere free to trade. The three-year fixed rate tranche wastrading 65bp tighter than its launch spread.
Very Good Site http://allphotobangkok.com/stmap_18jbbvts.html?viagra.metronidazole.malegra.b12 sleepwell mattress store chennai tamil nadu "This blatant intrusion into individuals' lives represents aserious threat to individual liberties and, if not stopped, maylead to the end of the rule of law," the InternationalFederation for Human Rights (FIDH) and the French Human RightsLeague (LDH) said in a statement.
I've lost my bank card http://www.kodiakmetalworks.com/stmap_18vfkjbs.html?progestogen.tritace.viagra.loratadine nicholas megalis best vines "Our (European) partners want to again unilaterally review what we've agreed on with the Americans. That's not how you do business, and I'm sure that despite these statements that are coming from European capitals, the Americans will, as proper negotiators, strictly stick to what has been agreed on."
I don't know what I want to do after university https://pjreporters.com/stmap_24wriwom.html?mevacor.vasodilan.levitra side effects albuterol sulfate hfa Authorities have not publicly discussed any possible motives for DiMaggio's actions. A family friend has said the suspect developed an apparent infatuation with the high school girl that made Hannah feel uncomfortable.
Not in at the moment https://proudlyyours.com/stmap_37iydmeb.html?imitrex.clobetasol.levitra ovral l tablet for irregular periods The ads algorithm tweaks may produce some unanticipated changes for how marketersâ ads are distributed in the coming weeks, Facebook said. But, âthis is ultimately better for marketers, because it means their messages are reaching the people most interested in what they have to offer,â the company said.