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[HTML canvas createimagedata create kaleidoscope effects] Canvas drawing properties Createimagedata Properties Explain and create kaleidoscope effects

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1<! DOCTYPE html>234<title>insert you title</title>5<meta name= ' description ' content= ' This is my page ' >6<meta name= ' keywords ' content= ' keyword1,keyword2,keyword3 ' >7<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">8<link rel= ' stylesheet ' type= ' text/css ' href= './css/index.css '/>9<script type= ' text/javascript ' src= './js/jquery-1.12.1.min.js ' ></script>Ten<style type= ' text/css ' > One Html,body,canvas { Amargin:0; padding:0; - } -  the HTML { -height:100%; - } -  + Body { -Background: #000; + } A  at #can { -Background: #FFF/*url ('./images/index.jpg ') no-repeat Center; Backgrond-size:cover*/; -Display:block; MARGIN:25PX Auto; border-radius:2px; cursor:pointer; - } -</style> -<script type= ' Text/javascript ' > in$(function(){ -         varcan = $ (' #can '). Get (0 ); to         varOcan = Can.getcontext (' 2d ' ); +         varOimg =NewImage (); -OIMG.SRC = './images/index.jpg '; the         varGimg = Ocan.getimagedata (50, 30, 100, 150);/*The reason for this is that the number of reads in the Loop*/ *Oimg.onload =function(){ $             varnum = 0;Panax Notoginseng             varLength =gImg.data.length; -             varimg = ocan.createimagedata (100, 100 ); the              for(vari = 0; i < length; i++ ){ +num = i% 4;/*0 1 2 3*/ A                 Switch(num) { the                      Case0 : +num = 0; -img.data[I] =getrandomnum (); $                      Break; $                      Case1 : -num = 255; -img.data[I] =getrandomnum (); the                      Break; -                      Case2 :Wuyinum = 0; theimg.data[I] =getrandomnum (); -                      Break; Wu                      Case3 : -num =getrandomnum (); Aboutimg.data[I] =num; $                      Break; -                 } -             } -Ocan.putimagedata (IMG, 10, 20 ); A         }; +         functionGetrandomnum () { the             returnMath.ceil (Math.random () * 255);/*0--255*/ -         } $         //alert (Getrandomnum ()); the     } ); the</script> the the<body> -<canvas id= ' can ' width= ' height= ' 168 ' > detects that your browser version is too low please upgrade your browser version for a better user experience ...</canvas> in</body> the

[HTML canvas createimagedata create kaleidoscope effects] Canvas drawing properties Createimagedata Properties Explain and create kaleidoscope effects

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