繪制圖片
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);
圖片平鋪
Var pat= context.createPattern(image,”repeat”);
Context.fillStyle=pat;
Context.fillRect(0,0,400,300);
圖片裁剪
先繪制好路徑
Context.clip();
繪制圖片代碼
<html>
<head>
<meta charset="UTF-8">
<title>繪制圖片</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);
//繪制圖片
var img = new Image(); //創建
img.src = "img/01.jpg"; //圖片地址
img.onload = function() { //檢測所有圖像信息載入頁面里
context.drawImage(img, 0, 0); // img對象;0,0:img坐標起點
};
</script>
</body>
</html>
圖片平鋪代碼
1 <!DOCTYPE html> 2 <html> 3 4 <head> 5 <meta charset="UTF-8"> 6 <title>圖片平鋪</title> 7 <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" /> 8 9 </head> 10 11 <body> 12 <canvas id="canvas" width="500" height="500"></canvas> 13 <script type="text/javascript"> 14 var oCanvas = document.getElementById("canvas"); 15 var context = oCanvas.getContext("2d"); 16 context.fillStyle = "#ededed"; 17 context.fillRect(0, 0, 500, 500); 18 //平鋪 19 20 var img = new Image(); //創建 21 img.src = "01.jpg"; //圖片地址 22 img.onload = function() { 23 var pat = context.createPattern(img, "repeat"); 24 context.fillStyle = pat; 25 context.fillRect(0, 0, 500, 500); 26 } 27 </script> 28 </body> 29 30 </html>
圖片裁剪代碼
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>圖片裁剪</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);
var img = new Image(); //創建
img.src = "04.jpg"; //圖片地址
img.onload = function() { //檢測所有圖像信息載入頁面里
// context.arc(100,100,60,0,2*Math.PI); //畫圓
context.fillRect(100,100,40,40);
context.strokeRect(100,100,40,40);
context.clip();//裁
context.drawImage(img,40,40);//
};
</script>
</body>
</html>