<html>
<head>
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no" />
<script src="js/jquery.js"></script>
</head>
<body>
<div style="display:none">
<img id="starImg" style="height:100%; width:100%;" src="img/invitation.png" />
</div>
<canvas id="main" height="730" width="420" style="border:1px solid #d3d3d3;"></canvas>
<input type="text" id="desc" onblur="hechen()" value="" />
<button onclick="saveImageInfo()">确认生成</button>
<script>
$(function(){
hechen();
});
function hechen(){
var mydate = new Date();
var date = mydate.getFullYear()+'-'+(mydate.getMonth()+1)+'-'+mydate.getDate();
var mainCtx = getCanvasContext('main');
var maxWidth = mainCtx.width;
var maxHeight = mainCtx.height;
mainCtx.clearRect(0,0,1000,1000);
//因为没法直接读取本地图片 所以做了这部操作
var starImg = new Image();
starImg.src=$('#starImg').attr('src');
starImg.onload=function(){
//先把图片绘制在这里
mainCtx.drawImage(starImg,0,0,420,730);
//读取用户的文本
if($('#desc').val()){
mainCtx.font = "small-caps bold 18px STXinwei";
//设置用户文本填充颜色
mainCtx.fillStyle = "black";
//从坐标点(50,50)开始绘制文字
mainCtx.fillText($('#desc').val(),108,335);
//设置时间填充颜色
mainCtx.font = "small-caps bold 16px STXinwei";
mainCtx.fillText(date,326,447);
}
};
}
function getCanvasContext(id){
return document.getElementById(id).getContext("2d");
}
function saveImageInfo() {
var mycanvas = document.getElementById("main");
var image = mycanvas.toDataURL("image/jpg");
var w=window.open('about:blank','image from canvas');
w.document.write("<img src='"+image+"' alt='from canvas'/>");
}
function saveAsLocalImage(){
var myCanvas = document.getElementById("main");
var image = myCanvas.toDataURL("image/jpg").replace("image/jpg", "image/octet-stream");
window.location.href=image;
}
</script>
</body>
</html>
Canvas画布图片文字拼接合成，生成图片
4星 · 超过85%的资源 需积分: 50 8 浏览量
2016-11-19
17:29:09
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邀请函图文合成demo.zip （3个子文件） 
invitation img 
invitation.png 162KB
index.html 2KB js 
jquery.js 91KB
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