用Canvas 加载一个图片_Jerry

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用Canvas 加载一个图片

(2013-05-13 17:21:48)

分类： CanvasDrow

(function(){

var myCanvas = document.getElementById_x("myCanvas");

myCanvas.width = 3000;

myCanvas.height = 3000;

var context = myCanvas.getContext("2d");

var getImage = function(src,cb){

var that = this;

var img = document.createElement_x("img");

img.src = src;

img.addEventListener("load",function(){

cb.call(that,img);

});

}

var img = getImage("waterfall/waterfall/pic/a.jpg",function(img){

context.drawImage(img,0,0);

context.save();

context.scale(1,1);

context.drawImage(img,10,10);

context.scale(1,1);

context.drawImage(img,10,10);

context.scale(1,1);

context.drawImage(img,10,10);

//context.clearRect(0,0,3000,3000);

});

})()

});

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