Sharkey/packages/backend/src/core/ImageProcessingService.ts

115 lines
2.5 KiB
TypeScript
Raw Normal View History

2022-09-17 21:27:08 +03:00
import { Inject, Injectable } from '@nestjs/common';
import sharp from 'sharp';
import { DI } from '@/di-symbols.js';
2022-09-20 23:33:11 +03:00
import type { Config } from '@/config.js';
2022-09-17 21:27:08 +03:00
export type IImage = {
data: Buffer;
ext: string | null;
type: string;
};
export const webpDefault: sharp.WebpOptions = {
quality: 85,
alphaQuality: 95,
lossless: false,
nearLossless: false,
smartSubsample: true,
mixed: true,
};
import { bindThis } from '@/decorators.js';
2022-09-17 21:27:08 +03:00
@Injectable()
export class ImageProcessingService {
constructor(
@Inject(DI.config)
private config: Config,
) {
}
/**
* Convert to JPEG
* with resize, remove metadata, resolve orientation, stop animation
*/
@bindThis
2022-09-17 21:27:08 +03:00
public async convertToJpeg(path: string, width: number, height: number): Promise<IImage> {
return this.convertSharpToJpeg(await sharp(path), width, height);
}
@bindThis
2022-09-17 21:27:08 +03:00
public async convertSharpToJpeg(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
const data = await sharp
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true,
})
.rotate()
.jpeg({
quality: 85,
progressive: true,
})
.toBuffer();
return {
data,
ext: 'jpg',
type: 'image/jpeg',
};
}
/**
* Convert to WebP
* with resize, remove metadata, resolve orientation, stop animation
*/
@bindThis
public async convertToWebp(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): Promise<IImage> {
return this.convertSharpToWebp(await sharp(path), width, height, options);
2022-09-17 21:27:08 +03:00
}
@bindThis
public async convertSharpToWebp(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): Promise<IImage> {
2022-09-17 21:27:08 +03:00
const data = await sharp
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true,
})
.rotate()
.webp(options)
2022-09-17 21:27:08 +03:00
.toBuffer();
return {
data,
ext: 'webp',
type: 'image/webp',
};
}
/**
* Convert to PNG
* with resize, remove metadata, resolve orientation, stop animation
*/
@bindThis
2022-09-17 21:27:08 +03:00
public async convertToPng(path: string, width: number, height: number): Promise<IImage> {
return this.convertSharpToPng(await sharp(path), width, height);
}
@bindThis
2022-09-17 21:27:08 +03:00
public async convertSharpToPng(sharp: sharp.Sharp, width: number, height: number): Promise<IImage> {
const data = await sharp
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true,
})
.rotate()
.png()
.toBuffer();
return {
data,
ext: 'png',
type: 'image/png',
};
}
}