HTML5 canvas 9绘制图片实例详解

2019-11-20 09:03:38

字体：大中小

来源：转载

供稿：网友

绘制图片

Var image=new Image();

image.src=” http://img4.duitang.com/uploads/item/201406/25/20140625182321_4MTau.thumb.700_0.jpeg”;

image.onload=function(){}

Context.drawImage(image,x,y);

Context.drawImage(image,x,y,w,h);

Context.drawIamge(image,sx,sy,sw,sh,dx,dy,dw,dh);

图片平铺

Var pat= context.createPattern(image,”repeat”);

Context.fillStyle=pat;

Context.fillRect(0,0,400,300);

图片裁剪

先绘制好路径

Context.clip();

<html> <head> <meta charset="UTF-8"> <title>绘制图片</title> <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" /> </head> <body> <canvas id="canvas" width="500" height="500"></canvas>  <script type="text/javascript">  var oCanvas = document.getElementById("canvas");  var context = oCanvas.getContext("2d");  context.fillStyle = "#ededed";  context.fillRect(0, 0, 500, 500);  //绘制图片  var img = new Image(); //创建  img.src = "img/01.jpg"; //图片地址  img.onload = function() { //检测所有图像信息载入页面里  context.drawImage(img, 0, 0); // img对象;0,0:img坐标起点  }; </script> </body></html>

上一篇：jquery validate表单验证插件

下一篇：js 获取元素所有兄弟节点的实现方法