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options for basic image quality control

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zadam
2019-11-03 11:43:04 +01:00
parent 9ea8209d4e
commit c9e4261930
4 changed files with 29 additions and 14 deletions
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19
src/services/image.js
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@@ -4,6 +4,7 @@ const repository = require('./repository');
const log = require('./log');
const protectedSessionService = require('./protected_session');
const noteService = require('./notes');
const optionService = require('./options');
const imagemin = require('imagemin');
const imageminMozJpeg = require('imagemin-mozjpeg');
const imageminPngQuant = require('imagemin-pngquant');
@@ -67,20 +68,16 @@ async function shrinkImage(buffer, originalName) {
return finalImageBuffer;
}
const MAX_SIZE = 1000;
const MAX_BYTE_SIZE = 200000; // images should have under 100 KBs
async function resize(buffer) {
const imageMaxWidthHeight = await optionService.getOptionInt('imageMaxWidthHeight');
const image = await jimp.read(buffer);
if (image.bitmap.width > image.bitmap.height && image.bitmap.width > MAX_SIZE) {
image.resize(MAX_SIZE, jimp.AUTO);
if (image.bitmap.width > image.bitmap.height && image.bitmap.width > imageMaxWidthHeight) {
image.resize(imageMaxWidthHeight, jimp.AUTO);
}
else if (image.bitmap.height > MAX_SIZE) {
image.resize(jimp.AUTO, MAX_SIZE);
}
else if (buffer.byteLength <= MAX_BYTE_SIZE) {
return buffer;
else if (image.bitmap.height > imageMaxWidthHeight) {
image.resize(jimp.AUTO, imageMaxWidthHeight);
}
// we do resizing with max quality which will be trimmed during optimization step next
@@ -96,7 +93,7 @@ async function optimize(buffer) {
return await imagemin.buffer(buffer, {
plugins: [
imageminMozJpeg({
quality: 50
quality: await optionService.getOptionInt('imageJpegQuality')
}),
imageminPngQuant({
quality: [0, 0.7]