Created
June 7, 2017 16:40
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gm image manipulation
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| const fs = require('fs'); | |
| const gm = require('gm'); | |
| function getSize(image) { | |
| return new Promise((resolve, reject) => { | |
| image.size((err, size) => { | |
| if (err) { | |
| reject(err); | |
| return; | |
| } | |
| resolve(size); | |
| }) | |
| }); | |
| } | |
| function write(name, image) { | |
| return new Promise((resolve, reject) => { | |
| image.write(name, (err) => { | |
| if (err) { | |
| reject(err); | |
| return; | |
| } | |
| resolve(); | |
| }) | |
| }) | |
| } | |
| const padding = 20; | |
| const fontSize = 24; | |
| const rectHeight = padding * 2 + fontSize - 10; | |
| const image = gm('image.jpg'); | |
| getSize(image) | |
| .then(({width, height}) => { | |
| image | |
| .stroke('#ec2c22') | |
| .fill('#ec2c2233') | |
| .drawRectangle(0, height - rectHeight, width, height); | |
| image | |
| .stroke('#ffffff') | |
| .fill('#ffffff') | |
| .font('Change-Calibre-Regular.ttf', fontSize) | |
| .drawText(padding, height - padding, 'Sign this petition'); | |
| console.log(width, height); | |
| return write('image_small.jpg', image) | |
| }) | |
| .then(() => console.log('done')) | |
| .catch(console.log); |
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