self-hosted/pigallery2
1
0
Fork 0
mirror of https://github.com/bpatrik/pigallery2.git synced 2024-12-25 02:04:15 +02:00
Code Issues Releases Activity

implementing basic thread pooling for thumbnail generation

Browse Source
This commit is contained in:
Braun Patrik 2017-01-21 22:54:43 +01:00
parent 827dd42418
commit f134d74b13
2 changed files with 42 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
backend/middlewares/ThumbnailGeneratorMWs.ts
View File

@ -1,6 +1,5 @@
///<reference path="customtypings/jimp.d.ts"/>
import * as path from "path";
import * as Jimp from "jimp";
import * as crypto from "crypto";
import * as fs from "fs";
import {NextFunction, Request, Response} from "express";
@ -11,6 +10,38 @@ import {DirectoryDTO} from "../../common/entities/DirectoryDTO";
import {ProjectPath} from "../ProjectPath";
import {PhotoDTO} from "../../common/entities/PhotoDTO";
const Pool = require('threads').Pool;
const pool = new Pool();
pool.run(
(input: {imagePath: string, size: number, thPath: string}, done) => {
//generate thumbnail
let Jimp = require("jimp");
Jimp.read(input.imagePath).then((image) => {
/**
* newWidth * newHeight = size*size
* newHeight/newWidth = height/width
*
* newHeight = (height/width)*newWidth
* newWidth * newWidth = (size*size) / (height/width)
*
* @type {number}
*/
let ratio = image.bitmap.height / image.bitmap.width;
let newWidth = Math.sqrt((input.size * input.size) / ratio);
image.resize(newWidth, Jimp.AUTO, Jimp.RESIZE_BEZIER);
image.quality(60); // set JPEG quality
image.write(input.thPath, () => { // save
return done();
});
}).catch(function (err) {
return done(new Error(ErrorCodes.GENERAL_ERROR));
});
}
);
export class ThumbnailGeneratorMWs {
@ -93,30 +124,18 @@ export class ThumbnailGeneratorMWs {
fs.mkdirSync(ProjectPath.ThumbnailFolder);
}
//generate thumbnail
Jimp.read(imagePath).then((image) => {
/**
* newWidth * newHeight = size*size
* newHeight/newWidth = height/width
*
* newHeight = (height/width)*newWidth
* newWidth * newWidth = (size*size) / (height/width)
*
* @type {number}
*/
let ratio = image.bitmap.height / image.bitmap.width;
let newWidth = Math.sqrt((size * size) / ratio);
image.resize(newWidth, Jimp.AUTO, Jimp.RESIZE_BEZIER);
image.quality(60); // set JPEG quality
image.write(thPath, () => { // save
return next();
});
}).catch(function (err) {
return next(new Error(ErrorCodes.GENERAL_ERROR));
//run on other thread
pool.send({imagePath: imagePath, size: size, thPath: thPath})
.on('done', (out) => {
return next(out);
}).on('error', (job, error) => {
return next(new Error(ErrorCodes.GENERAL_ERROR, error));
});
}
private static generateThumbnailName(imagePath: string, size: number): string {

1
package.json
View File

@ -49,6 +49,7 @@
"reflect-metadata": "^0.1.9",
"rxjs": "^5.0.2",
"systemjs": "0.19.41",
"threads": "^0.7.2",
"typeorm": "0.0.6",
"zone.js": "^0.7.4"
},