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