javascript - CreateJS filter performance -


i have been developing game using createjs , noticed significant performance drop when filter applied image. created small test case showcase problem:

var isinitialized = false;  function start(preload) {      egg = preload.getresult("kiausinis");      center = new vector(stage.canvas.width/2,stage.canvas.height/2);      eggimg = new createjs.bitmap(egg);     stage.addchild(eggimg);     eggimg.x = center.x-300;     eggimg.y = center.y;     centerorigin(eggimg);     eggimg.on("click",applyfilters);      eggimg2 = new createjs.bitmap(egg);     stage.addchild(eggimg2);     eggimg2.x = center.x;     eggimg2.y = center.y;     centerorigin(eggimg2);      eggimg3 = new createjs.bitmap(egg);     stage.addchild(eggimg3);     eggimg3.x = center.x+300;     eggimg3.y = center.y;     centerorigin(eggimg3);      fpslabel = new createjs.text("fps:","150px verdana","black");     fpslabel.linewidth = 200;     fpslabel.textalign = "center";     fpslabel.x = center.x;     fpslabel.y = center.y;     stage.addchild(fpslabel);      isinitialized = true;  }  function update(){      if(!isinitialized) return;      fpslabel.text= "fps: " + math.round(createjs.ticker.getmeasuredfps(3));     stage.update();  }  function centerorigin(img){      img.regx = img.getbounds().width/2;     img.regy = img.getbounds().height/2;  }  function applyfilters(){      changeimgcolor(eggimg,1,0.8,0.7,1);     changeimgcolor(eggimg2,1,0.8,0.7,1);     changeimgcolor(eggimg3,1,0.8,0.7,1);  }  function changeimgcolor(img, r, g, b, a){      img.filters = [          new createjs.colorfilter(r, g, b, a)      ];      img.cache(0,0,img.getbounds().width,img.getbounds().height);     img.updatecache();  }

code shows primitive set up. add 3 images stage , when 1 of them clicked apply color filter of them. before applying filter arround 200fps on desktop , mobile. after filter applied instantly drops around 5fps on mobile. though framerate drops 5fps counter still shows 200fps (you can tell framerate dropped because fps counter refreshes now).

a live demo can seen here: http://spaceout.bugs3.com/performancetest/

what happening here? doing wrong? has else encountered similar problems?

thank you.


-

Comments

Post a Comment

Popular posts from this blog

c# - Binding a comma separated list to a List<int> in asp.net web api -

the default binder in web api expecst http://url.com/webapi/report/?pageids=3243&pageids=2365 to bind public ihttpactionresult report(list<int> pageids){ // exciting webapi code} i wish bind http://url.com/webapi/report/?pageids=3243,2365 as running out of space in url get . i have created class public class commaseparatedmodelbinder : system.web.http.modelbinding.imodelbinder { public bool bindmodel(httpactioncontext actioncontext, modelbindingcontext bindingcontext) { //binding in here } } and registered in webapiconfig.cs var provider = new simplemodelbinderprovider( typeof(list<int>), new commaseparatedmodelbinder()); config.services.insert(typeof(modelbinderprovider), 0, provider); i have altered method signature use model binder so public ihttpactionresult report( [modelbinder] list<int> pageids){ // exciting webapi code} however break point in binder not being
Read more

Delphi 7 and decode UTF-8 base64 -

in delphi 7, have widestring encoded base64(that received web service widestring result) : pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg== when decoded it, result not utf-8: <?xml version="1.0"?> <string>طھط³طھ</string> but when decoded base64decode.org, result true : <?xml version="1.0"?> <string>تست</string> i have use encddecd unit decodestring function. the problem have using decodestring . function, in delphi 7, treats decoded binary data being ansi encoded. , problem text utf-8 encoded. to continue encddecd unit have couple of options. can switch decodestream . instance, code produce utf-8 encoded text file data: {$apptype console} uses classes, encddecd; const data = 'pd94bwwgdmvyc2lvbj0ims4wij8+dqo8c3ryaw5nptiq2lpyqjwvc3ryaw5npg=='; var input: tstringstream; output: tfilestream; begin input := tstringstream.create(data); try output := tfilestream.
Read more

html - Is there any way to exclude a single element from the style? (Bootstrap) -

so, have img logo, overlaid on div styled background-image: url("...") , , both elements inside 2 div classes .to-color , .to-overlay respectively, black transparent overlay. is there way exclude logo style given these 2 classes? here's jsfiddle example: link html , css example: - html - <div class="to-color"> <div class="to-overlay"> <div class="respo"> <div class="row"> <div class="col-xs-4 col-xs-offset-4 text-center"> <img src="http://ansonalex.com/wp-content/uploads/2011/06/google-logo-768x260.png" alt="..." class="img-responsive"> </div> </div> </div> </div> </div> - css - .to-color { background-color: #000; } .to-overlay { opacity : 0.5; } .respo { background-image: url("https://source.unsplash.com/category/objects/1600x900"); background-position: center center;
Read more