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/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import { Injectable } from '@nestjs/common';
import sharp from 'sharp';
export type IImage = {
data: Buffer;
ext: string | null;
type: string;
};
export type IImageStream = {
data: Readable;
ext: string | null;
type: string;
};
export type IImageSharp = {
data: sharp.Sharp;
ext: string | null;
type: string;
};
export type IImageStreamable = IImage | IImageStream | IImageSharp;
export const webpDefault: sharp.WebpOptions = {
quality: 77,
alphaQuality: 95,
lossless: false,
nearLossless: false,
smartSubsample: true,
mixed: true,
effort: 2,
loop: 0,
};
export const avifDefault: sharp.AvifOptions = {
quality: 60,
lossless: false,
effort: 2,
};
import { bindThis } from '@/decorators.js';
import { Readable } from 'node:stream';
@Injectable()
export class ImageProcessingService {
constructor(
) {
}
/**
* 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(sharp(path), width, height, options);
}
@bindThis
public async convertSharpToWebp(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): Promise<IImage> {
const result = this.convertSharpToWebpStream(sharp, width, height, options);
return {
data: await result.data.toBuffer(),
ext: result.ext,
type: result.type,
};
}
@bindThis
public convertToWebpStream(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageSharp {
return this.convertSharpToWebpStream(sharp(path), width, height, options);
}
@bindThis
public convertSharpToWebpStream(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageSharp {
const data = sharp
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true,
})
.rotate()
.webp(options);
return {
data,
ext: 'webp',
type: 'image/webp',
};
}
/**
* Convert to Avif
* with resize, remove metadata, resolve orientation, stop animation
*/
@bindThis
public async convertToAvif(path: string, width: number, height: number, options: sharp.AvifOptions = avifDefault): Promise<IImage> {
return this.convertSharpToAvif(sharp(path), width, height, options);
}
@bindThis
public async convertSharpToAvif(sharp: sharp.Sharp, width: number, height: number, options: sharp.AvifOptions = avifDefault): Promise<IImage> {
const result = this.convertSharpToAvifStream(sharp, width, height, options);
return {
data: await result.data.toBuffer(),
ext: result.ext,
type: result.type,
};
}
@bindThis
public convertToAvifStream(path: string, width: number, height: number, options: sharp.AvifOptions = avifDefault): IImageSharp {
return this.convertSharpToAvifStream(sharp(path), width, height, options);
}
@bindThis
public convertSharpToAvifStream(sharp: sharp.Sharp, width: number, height: number, options: sharp.AvifOptions = avifDefault): IImageSharp {
const data = sharp
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true,
})
.rotate()
.avif(options);
return {
data,
ext: 'avif',
type: 'image/avif',
};
}
/**
* Convert to PNG
* with resize, remove metadata, resolve orientation, stop animation
*/
@bindThis
public async convertToPng(path: string, width: number, height: number): Promise<IImage> {
return this.convertSharpToPng(sharp(path), width, height);
}
@bindThis
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',
};
}
}
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