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@ -1,31 +1,36 @@ |
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const gm = require('@tohru/gm') |
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const gm = require('gm').subClass({ imageMagick: true }) |
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, rr = (min, max) => Math.floor(Math.random() * (max-min + 1) + min) |
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, width = 200 |
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, height = 80; |
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function getShape() { |
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const x1 = rr(width * 0.1, width * 0.9) |
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, y1 = rr(height * 0.1, height * 0.9) |
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, size = rr(15, 30) |
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, x2 = rr(x1, x1 + size) |
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, y2 = rr(y1, y1 + size); |
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return { x1, x2, y1, y2 }; |
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} |
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, height = 80 |
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, distortion = 15 |
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module.exports = (text, captchaId) => { |
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return new Promise((resolve, reject) => { |
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text = text.split(''); //array of chars
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const x = gm(200, 80, '#fff') |
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const recy = rr(35,45); |
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const distorts = []; |
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const numDistorts = rr(3,5); |
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const div = width/numDistorts; |
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for (let i = 0; i < numDistorts; i++) { |
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const originx = rr((div*i)+distortion, (div*(i+1))-distortion); |
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const originy = rr(distortion,height-distortion); |
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const destx = rr(Math.max(distortion,originx-distortion),Math.min(width-distortion,originx+distortion)); |
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const desty = rr(Math.max(distortion,originy-distortion*2),Math.min(height-distortion,originy+distortion*2)); |
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distorts.push([ |
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{x:originx,y:originy}, //origin
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{x:destx,y:desty} //dest
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]); |
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} |
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const x = gm(width,height, '#fff') |
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.fill('#000') |
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.fontSize(70) |
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let lastx = 0; |
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.fontSize(65) |
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let lastx = 7; |
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for (let i = 0; i <6; i++) { |
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x.drawText(lastx, 45+rr(0,10), text[i]) |
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x.drawText(lastx, 60, text[i]) |
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switch (text[i]) { |
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case 'w': |
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case 'm': |
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lastx += 40; |
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break; |
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lastx += 45; |
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break; |
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case 'i': |
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case 'f': |
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case 'l': |
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@ -35,14 +40,12 @@ module.exports = (text, captchaId) => { |
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break; |
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default: |
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lastx += 30; |
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break; |
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break; |
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} |
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} |
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const recy1 = rr(20,40) |
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x.drawRectangle(rr(5,10), recy1, rr(190,195), recy1+5) |
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.wave(10, rr(80,120)) |
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.blur(1, 2) |
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.crop(200, 80, 0, 0) |
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//.drawText(5, 60, text)
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x.drawRectangle(5, recy, 195, recy+4) |
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.distort(distorts, 'Shepards') |
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.quality(30) |
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.write(`./static/captcha/${captchaId}.jpg`, (err) => { |
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if (err) { |
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