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import * as sharp from 'sharp';
import * as fs from 'fs';
export type IImage = {
data: Buffer;
ext: string | null;
type: string;
};
/**
* Convert to JPEG
* with resize, remove metadata, resolve orientation, stop animation
*/
export async function convertToJpeg(path: string, width: number, height: number): Promise<IImage> {
const data = await sharp(path)
.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
*/
export async function convertToWebp(path: string, width: number, height: number): Promise<IImage> {
const data = await sharp(path)
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true
})
.rotate()
.webp({
quality: 85
})
.toBuffer();
return {
data,
ext: 'webp',
type: 'image/webp'
};
}
/**
* Convert to PNG
* with resize, remove metadata, resolve orientation, stop animation
*/
export async function convertToPng(path: string, width: number, height: number): Promise<IImage> {
const data = await sharp(path)
.resize(width, height, {
fit: 'inside',
withoutEnlargement: true
})
.rotate()
.png()
.toBuffer();
return {
data,
ext: 'png',
type: 'image/png'
};
}
/**
* Convert to GIF (Actually just NOP)
*/
export async function convertToGif(path: string): Promise<IImage> {
const data = await fs.promises.readFile(path);
return {
data,
ext: 'gif',
type: 'image/gif'
};
}
/**
* Convert to APNG (Actually just NOP)
*/
export async function convertToApng(path: string): Promise<IImage> {
const data = await fs.promises.readFile(path);
return {
data,
ext: 'apng',
type: 'image/apng'
};
}
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