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FXQ.js
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FXQ.js
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"use strict";
var FXQ = {
//签章颜色定义
colors: ['red','blue','#000'],
//签章字体定义
fonts: ['SimSun','YouYuan','KaiTi'],
baseConf: {
color: null,
font: null,
},
commonMethod: function(cType,fType) {
var color = null;
color = this.colors[cType];
if (color === undefined || color == 'undefined') {
color = this.colors[0];
}
var font = this.fonts[fType];
if (font === undefined || font == 'undefined') {
font = this.fonts[0];
}
this.baseConf.color = color;
this.baseConf.font = font;
},
/**
*
* @param company 公司名称
* @param cType 颜色 0.红 1. 蓝色 2.其他
* @param fType 字体 0.宋体
* @param sType 签章类型 0.公章 1.合同专用章
* @param seaNo 这个是签章的序列号
*/
companySeal: function (company,cType,fType,sType,seaNo) {
//获取canvans doc对象
// var canvas = document.getElementById('canvas');
var canvas = document.createElement("canvas");
var context = canvas.getContext('2d');
canvas.width = 300;
canvas.height = 300;
this.commonMethod(cType,fType);
var width = canvas.width/2;
var height = canvas.height/2;
//画圆方法
drawCircle()
draw5Start(30,0)
drawTitle();
writeSerNo(seaNo)
writeFont(company)
//返回图片base64
return canvas.toDataURL();
/**
* 画圆的方法
* color : 圆边框的颜色
* lineWidth: 线条宽度
*/
function drawCircle() {
context.translate(0,0);
context.lineWidth = 5;
context.strokeStyle=FXQ.baseConf.color;
context.beginPath();
context.arc(width,height,110,0,Math.PI*2);
context.stroke();
context.save();
var data = canvas.toDataURL("image/jpeg")
console.log(canvas);
}
/**
* 绘制五角星
* @param sx
* @param sy
* @param radius
* @param color
* @param rotato
*/
function draw5Start() {
context.save();
context.fillStyle=FXQ.baseConf.color;
//移动坐标原点 中心点开始绘制
context.translate(width,height);
//旋转
context.rotate(Math.PI);
context.beginPath();
var dig = Math.PI/5*4
for (var i = 0; i < 5; i++) {
var x = Math.sin(i*dig);
var y = Math.cos(i*dig);
context.lineTo(x*30,y*30);
}
context.closePath();
context.stroke();
context.fill();
context.restore();
}
/**
* 绘制公章标题
*/
function drawTitle() {
var title = '';
if (sType != 0) {
title = '合同专用章';
}
// 绘制印章名称
context.font = 'bolder 20px '+FXQ.baseConf.font;
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 = FXQ.baseConf.color;
context.fillText(title,width,height+65);
}
/**
* 绘制公司名称
*/
function writeFont() {
context.font = 'bolder 30px '+FXQ.baseConf.font;
var count = company.length;// 字数
var angle = -4*Math.PI/(3*(count - 1));// 字间角度
var chars = company.split("");
var trueChars = chars.reverse();
var c;
for (var i = 0; i < count; i++){
c = trueChars[i];// 需要绘制的字符
if(i==0)
context.rotate(5*Math.PI/6.1);
else
context.rotate(angle);
context.save();
context.translate(95, 0);// 平移到此位置,此时字和x轴垂直,第一个参数是与圆外边的距离,越大距离越近
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();
}
}
/**
* 绘制签章序列号
* @param serNo
*/
function writeSerNo(serNo) {
context.translate(width, height);
context.font = 'bolder 8px '+FXQ.baseConf.font;
var count = serNo.length;// 字数
var angle = -2 * Math.PI / (6 * (count - 1));// 字间角度
var chars = serNo.split("");
for (var i = 0; i < count; i++) {
var c = chars[i];// 需要绘制的字符
if (i == 0)
context.rotate(10 * Math.PI / 5.95);
else
context.rotate(angle);
context.save();
context.translate(-95, 5);// 平移到此位置,此时字和x轴垂直,第一个参数是与圆外边的距离,越大距离越近
context.rotate(Math.PI / 2);// 旋转90度,让字平行于x轴
context.fillStyle = FXQ.baseConf.color;
context.fillText(c, 0, 5);// 此点为字的中心点
context.restore();
}
}
},
/**
* 绘制个人签章
* @param name 姓名
* @param cType 字体颜色
* @param fType 字体
* @param type 类型
*/
personal: function (name,cType,fType,type,border) {
this.commonMethod(cType,fType);
var color = FXQ.baseConf.color;
var font = FXQ.baseConf.font;
//获取canvans doc对象
//var canvas = document.getElementById('canvas');
var canvas = document.createElement("canvas");
var context = canvas.getContext('2d');
canvas.width = 120;
canvas.height = 120;
var length = name.length;
//长方形前面
if (type == 0) {
console.log(context.width)
//要边框
if (border == 0) {
context.rect(5, 5, 100, 50);
context.strokeStyle = color;
context.lineWidth = 4
context.stroke();
}
// 绘制印章名称
context.font = '30px '+font;
if (length > 3)
{
context.font = '24px '+font;
}
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 = color;
context.textAlign = 'center'; //设置文本的水平对对齐方式
context.fillText(name,55,30);
} else {//正方形
var personal = '';
switch (name.length) {
case 3:
name += '印';
break;
case 2:
name += '之印';
default:
break;
}
var names = name.split('');
personal = names[2]+names[0]+names[3]+names[1];
//要边框
if (border == 0) {
context.rect(2,2,108,108);
context.strokeStyle=color;
context.lineWidth=2
context.stroke();
}
// 绘制印章名称
context.font = '40px '+font;
context.fillStyle = color;
this.wrapText(context,personal,8,45,80,40)
}
//返回图片base64
return canvas.toDataURL();
},
//椭圆签章
companyEllipse: function (company,serNo,fType,cType) {
//椭圆长轴半径
var radiusX = 140;
//短轴半径
var radiusY = 90;
this.commonMethod(cType,fType);
var color = FXQ.baseConf.color;
var font = FXQ.baseConf.font;
//var canvas = document.getElementById('canvas');
var canvas = document.createElement("canvas");
canvas.width = 300;
canvas.height = 300;
canvas.width = 2 * radiusX + 5;
canvas.height = 2 * radiusY + 5;
var context = canvas.getContext('2d');
writeFont(true,company);
writeFont(false,serNo);
writeTitle();
drawEllipse();
function writeFont(isTop,words) {
var totalArcAng = 180;
font = "20px "+font
//字体长度
if (!isTop) {
totalArcAng = 60;
font = "10px "+font
}
var fontTextLen = words.length;
var radiusWidth = radiusX + context.lineWidth;
var radiusHeight = radiusY + context.lineWidth;
//从边线向中心的移动因子
var minRat = 0.9;
//起始角度
var startAngle = isTop == true ? -90 -totalArcAng/2 : 90 - totalArcAng/2;
var step = 0.5;
var alCount = Math.ceil(totalArcAng / step) + 1;
var angleArr = new Array(alCount);
var arcLenArr = new Array(alCount);
var num = 0;
var accArcLen = 0;
angleArr[num] = startAngle;
arcLenArr[num] = accArcLen;
num++;
var angR = startAngle * Math.PI / 180;
var lastX = radiusX * Math.cos(angR) + radiusWidth;
var lastY = radiusY * Math.sin(angR) + radiusHeight;
for (var i = startAngle + step; num < alCount; i+=step) {
angR = i * Math.PI / 180;
var x = radiusX * Math.cos(angR) + radiusWidth;
var y = radiusY * Math.sin(angR) + radiusHeight;
accArcLen += Math.sqrt((lastX - x) * (lastX - x) + (lastY - y) * (lastY - y));
angleArr[num] = i;
arcLenArr[num] = accArcLen;
lastX = x;
lastY = y;
num++;
}
var arcPer = accArcLen / fontTextLen;
for (var i = 0; i < fontTextLen; i++) {
var arcL = i * arcPer + arcPer / 2;
var ang = 0;
for (var p = 0; p < arcLenArr.length - 1; p++) {
if (arcLenArr[p] <= arcL && arcL <= arcLenArr[p + 1]) {
ang = (arcL >= ((arcLenArr[p] + arcLenArr[p + 1]) /2)) ? angleArr[p + 1] : angleArr[p];
break;
}
}
angR = (ang * Math.PI / 180);
var x = radiusX * Math.cos(angR) + radiusX;
var y = radiusY * Math.sin(angR) + radiusY;
var qxang = Math.atan2(radiusY * Math.cos(angR),-radiusX * Math.sin(angR));
var fxang = qxang + Math.PI / 2;
var subIndex = isTop == true ? i : fontTextLen - 1 -i;
var c = words[subIndex];
var w = 25; var h = 31;
if (!isTop) {
w = 2; h = 10;
}
x += (h * minRat) * Math.cos(fxang);
y += (h * minRat) * Math.sin(fxang);
if (isTop) {
x += -w / 2 * Math.cos(qxang);
y += -w / 2 * Math.sin(qxang);
} else {
x += w / 2 * Math.cos(qxang);
y += w / 2 * Math.sin(qxang);
}
context.save()
context.translate(x,y);
if (isTop == true) {
context.rotate((fxang * 180 / Math.PI - 90) * Math.PI / 180)
} else {
context.rotate((fxang * 180 / Math.PI + 180 -90)* Math.PI / 180)
}
context.translate(-x,-y)
context.fillStyle = color;
context.font = font;
context.fillText(c,x,y);
context.restore();
}
}
function writeTitle() {
context.fillStyle = color;
context.font = '20px SimSun';
context.textAlign = 'center';
context.fillText('合同专用章',radiusX,radiusY+20);
context.restore();
}
function drawEllipse() {
context.ellipse(radiusX + context.lineWidth+1,radiusY + context.lineWidth+1,radiusX,radiusY,0,0,Math.PI*2);
//背景透明
context.fillStyle = "rgba(255, 255, 255, 0)";
context.strokeStyle = color;
context.lineWidth = 3;
context.fill();
context.stroke();
}
//返回图片base64
return canvas.toDataURL();
},
/**
* 字体换行
* */
wrapText: function (ctx,text, x, y, maxWidth, lineHeight) {
if (typeof text != 'string' || typeof x != 'number' || typeof y != 'number') {
return;
}
var context = ctx;
var canvas = context.canvas;
if (typeof maxWidth == 'undefined') {
maxWidth = (canvas && canvas.width) || 112;
}
if (typeof lineHeight == 'undefined') {
lineHeight = (canvas && parseInt(window.getComputedStyle(canvas).lineHeight)) || parseInt(window.getComputedStyle(document.body).lineHeight);
}
// 字符分隔为数组
var arrText = text.split('');
var line = '';
for (var n = 0; n < arrText.length; n++) {
var testLine = line + arrText[n];
var metrics = context.measureText(testLine);
var testWidth = metrics.width;
if (testWidth > maxWidth && n > 0) {
context.fillText(arrText[0], x, y);
context.fillText(arrText[1], x+50, y);
line = arrText[n];
y += lineHeight;
} else {
line = testLine;
}
}
context.fillText(arrText[2], x, y+10);
context.fillText(arrText[3], x+50, y+10);
}
};