ppu-ocv/canvas-toolkit.js

A type-safe, modular, chainable image processing library built on top of OpenCV.js with a fluent API leveraging pipeline processing.

import{CanvasToolkitBase}from"./canvas-toolkit.base.js";import{createWriteStream,existsSync,mkdirSync,readdirSync,unlinkSync}from"fs";import{join}from"path";export class CanvasToolkit extends CanvasToolkitBase{static _nodeInstance=null;constructor(){super()}static getInstance(){if(!CanvasToolkit._nodeInstance){CanvasToolkit._nodeInstance=new CanvasToolkit}return CanvasToolkit._nodeInstance}saveImage(options){const{canvas,filename,path="out"}=options;let folderPath=join(process.cwd(),path);if(!existsSync(folderPath)){mkdirSync(folderPath,{recursive:true})}let filePath=join(folderPath,`${this.step++}. ${filename}.png`);let out=createWriteStream(filePath);if(typeof canvas.toBuffer!=="function")throw new Error("toBuffer not available on this canvas");let buffer=canvas.toBuffer("image/png");return new Promise((res,rej)=>{out.write(buffer,(err)=>{if(err){rej(err)}else{res()}})})}clearOutput(path="out"){let folderPath=join(process.cwd(),path);if(existsSync(folderPath)){let files=readdirSync(folderPath);for(let file of files){if(file===".gitignore")continue;let filePath=join(folderPath,file);unlinkSync(filePath)}}}}