html5 canvas用图案填充形状
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>用图案填充形状</title> <script src="js/modernizr.js"></script> </head> <body> <script type="text/javascript"> window.addEventListener(‘load‘,eventWindowLoaded,false); function eventWindowLoaded(){ canvasApp(); } function canvasSupport(){ return Modernizr.canvas; } function canvasApp(){ if(!canvasSupport()){ return; }else{ var theCanvas = document.getElementById(‘canvas‘) var context = theCanvas.getContext("2d") } drawScreen(); function drawScreen(){ var fillImg=new Image(); fillImg.src=‘fill_20x20.png‘; fillImg.onload=function(){
//简单的onload
//图片填充的4种类型:repeat,no-repeat,repeat-x,repeat-y;
//createPattern()填充图像函数,一个图像的实例,一个填充的类型
var fillPattern = context.createPattern(fillImg,‘repeat-x‘); var fillPattern1 = context.createPattern(fillImg,‘repeat-y‘); var fillPattern2 = context.createPattern(fillImg,‘repeat‘); context.fillStyle=fillPattern; context.fillRect(0,0,100,20); context.fillStyle=fillPattern1; context.fillRect(0,10,100,20); context.fillStyle=fillPattern2; context.fillRect(0,60,100,10); } } } </script> <canvas id="canvas" width="500" height="500"> 你的浏览器无法使用canvas 如有疑问加QQ:1035417613;小白童鞋;你的支持是我最大的快乐!! </canvas> </body> </html>
注意图片的路径!!!其他就和css的background感觉差不多
//图片填充的4种类型:repeat,no-repeat,repeat-x,repeat-y;
//createPattern()填充图像函数,一个图像的实例,一个填充的类型
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