tryhtml5_canvas_createpattern 在线代码实例

 <p>图片应用:</p>
<img src="/upload2/statics/images/lamp.jpg" id="lamp">
<p>画布:</p>
<button onclick="draw('repeat')">重复</button> 
<button onclick="draw('repeat-x')">重复-x</button> 
<button onclick="draw('repeat-y')">重复-y</button> 
<button onclick="draw('no-repeat')">不重复</button>     
<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
您的浏览器不支持 HTML5 canvas 标签。
</canvas>
<script>
function draw(direction){
	var c=document.getElementById("myCanvas");
	var ctx=c.getContext("2d");
	ctx.clearRect(0,0,c.width,c.height); 
	var img=document.getElementById("lamp")
	var pat=ctx.createPattern(img,direction);
	ctx.rect(0,0,220,128);
	ctx.fillStyle=pat;
	ctx.fill();
}
</script>