日期:2014-05-17  浏览次数:20692 次

html5中往矩形中贴图片

分两步:


1. 画布大小就是矩形的大小

<body onload="drawRect();">
   <canvas id="canvas" width="100" height="500">
    aaa
    </canvas>
</body>



2. 画到矩形上的代码
 <script>
    var IMG_SRC = "./1.jpg";
     function drawRect() {
        var canvas = document.getElementById("canvas");
        var context = canvas.getContext("2d");
        //context.strokeRect(50, 50, 120, 120);

        var img=new Image();
         //图像被装入后触发
         img.onload=function(){
         context.drawImage(img,0,0);
         }
         img.src=IMG_SRC;
     }
 </script>

全部代码:

<!DOCTYPE HTML>
<html>
<head>
<title>HTML5 Canvas Sample</title>

 <script>
    var IMG_SRC = "./1.jpg";
     function drawRect() {
        var canvas = document.getElementById("canvas");
        var context = canvas.getContext("2d");
        //context.strokeRect(50, 50, 120, 120);

        var img=new Image();
         //图像被装入后触发
         img.onload=function(){
         context.drawImage(img,0,0);
         }
         img.src=IMG_SRC;
     }
 </script>
</head>

<body onload="drawRect();">
   <canvas id="canvas" width="100" height="500">
    aaa
    </canvas>
   <canvas id="canvas1" width="500" height="500">
    bbb
    </canvas>

</body>

</html>