<html> <head> <meta charset="utf-8"> </head> <style type="text/css" name="文字盖章"> .seal-content{ width: 300px; min-height: 60px; vertical-align: bottom; word-wrap: break-word; position: relative; } .seal-result{ width: 60px; height: 60px; transform: rotate(30deg); border: solid 2px green; border-radius: 100%; text-align: center; color: green; font-size: 16px; font-weight: bold; line-height: 60px; right: 5px; bottom: 0px; position: absolute; background-color: rgba(255,255,255,0.8) } .seal-result-fail{ border-color: red; color: red; } </style> <body> <canvas id="canvas" width="200" height="200"></canvas> </body> <script name="自定义印章"> var canvas = document.getElementById("canvas"); var context = canvas.getContext('2d'); var text = "XXX专用章"; var companyName = "XXX科技股份有限公司"; // 绘制印章边框 var width = canvas.width / 2; var height = canvas.height / 2; context.lineWidth = 5; context.strokeStyle = "#f00"; context.beginPath(); context.arc(width, height, 90, 0, Math.PI * 2);//宽、高、半径 context.stroke(); //画五角星 create5star(context,width,height,25,"#f00",0); // 绘制印章名称 context.font = '20px 宋体'; context.textBaseline = 'middle';//设置文本的垂直对齐方式 context.textAlign = 'center'; //设置文本的水平对对齐方式 context.lineWidth=1; context.strokeStyle = '#f00'; context.strokeText(text,width,height+60); // 绘制印章单位 context.translate(width,height);// 平移到此位置, context.font = '23px 宋体'; var count = companyName.length;// 字数 var angle = 4*Math.PI/(3*(count - 1));// 字间角度 var chars = companyName.split(""); var c; for (var i = 0; i < count; i++) { c = chars[i];// 需要绘制的字符 if (i == 0) { context.rotate(5 * Math.PI / 6); } else{ context.rotate(angle); } context.save(); context.translate(70, 0);// 平移到此位置,此时字和x轴垂直，公司名称和最外圈的距离 context.rotate(Math.PI / 2);// 旋转90度,让字平行于x轴 context.strokeText(c, 0, 0);// 此点为字的中心点 context.restore(); } //绘制五角星 function create5star(context, sx, sy, radius, color, rotato) { context.save(); context.fillStyle = color; context.translate(sx, sy);//移动坐标原点 context.rotate(Math.PI + rotato);//旋转 context.beginPath();//创建路径 var x = Math.sin(0); var y = Math.cos(0); var dig = Math.PI / 5 * 4; for (var i = 0; i < 5; i++) {//画五角星的五条边 var x = Math.sin(i * dig); var y = Math.cos(i * dig); context.lineTo(x * radius, y * radius); } context.closePath(); context.stroke(); context.fill(); context.restore(); } </script> </html>
<template> <div class="page"> <div id="main" class="main"> <canvas id="canvas" width="200" height="200"></canvas> </div> </div> </template> <script> export default { name: "Home", data() { return { orgName: '长沙市第一中学' } }, components: {}, created() { }, mounted() { var canvas = document.getElementById('canvas'); var context = canvas.getContext('2d'); // 绘制印章边框 var width = canvas.width / 2; var height = canvas.height / 2; context.lineWidth = 3; context.strokeStyle = "#f00"; context.beginPath(); // 圆圈大小 context.arc(width, height, 80, 0, Math.PI * 2); context.stroke(); //画五角星 this.create5star(context, width, height, 15, "#f00", 0); // 绘制印章名称 context.font = '16px Helvetica'; context.textBaseline = 'middle';//设置文本的垂直对齐方式 context.textAlign = 'center'; //设置文本的水平对对齐方式 context.lineWidth = 1; context.fillStyle = '#f00'; let name = "验收专用章" context.fillText(name, width, height + 45); // 绘制印章单位 context.translate(width, height);// 平移到此位置, context.font = '16px Helvetica' var count = this.orgName.length;// 字数 var angle = 4 * Math.PI / (3 * (count - 1));// 字间角度 var chars = this.orgName.split(""); var c; for (var i = 0; i < count; i++) { c = chars[i];// 需要绘制的字符 if (i == 0) context.rotate(5 * Math.PI / 6); else context.rotate(angle); context.save(); // 文字位置调整 context.translate(70, 0);// 平移到此位置,此时字和x轴垂直 context.rotate(Math.PI / 2);// 旋转90度,让字平行于x轴 context.fillText(c, 0, 5);// 此点为字的中心点 context.restore(); } }, methods: { //绘制五角星 /** * 创建一个五角星形状. 该五角星的中心坐标为(sx,sy),中心到顶点的距离为radius,rotate=0时一个顶点在对称轴上 * rotate:绕对称轴旋转rotate弧度 */ create5star(context, sx, sy, radius, color, rotato) { context.save(); context.fillStyle = color; context.translate(sx, sy);//移动坐标原点 context.rotate(Math.PI + rotato);//旋转 context.beginPath();//创建路径 var x = Math.sin(0); var y = Math.cos(0); var dig = Math.PI / 5 * 4; for (var i = 0; i < 5; i++) {//画五角星的五条边 var x = Math.sin(i * dig); var y = Math.cos(i * dig); context.lineTo(x * radius, y * radius); } context.closePath(); context.stroke(); context.fill(); context.restore(); } } } </script> <style scoped> </style>