# Add a watermark to the image We can use the [postProcessImageData](../../api/image-editor/exports/#postprocessimagedata) hook on the `createDefaultImageWriter` function to add a watermark to the `imageData` before the output file is created. * [ ![](/pintura/static/assets/technologies-mono/javascript.svg)JavaScript](#javascript-panel-0) * [ ![](/pintura/static/assets/technologies-mono/react.svg)React](#react-panel-0) * [ ![](/pintura/static/assets/technologies-mono/vue.svg)Vue](#vue-panel-0) * [ ![](/pintura/static/assets/technologies-mono/svelte.svg)Svelte](#svelte-panel-0) * [ ![](/pintura/static/assets/technologies-mono/angular.svg)Angular](#angular-panel-0) * [ ![](/pintura/static/assets/technologies-mono/jquery.svg)jQuery](#jquery-panel-0) * [index.html](#index-html-panel-0) ```html

``` * [App.jsx](#App-jsx-panel-0) * [App.css](#App-css-panel-0) ```jsx import '@pqina/pintura/pintura.css'; import './App.css'; import { useState } from 'react'; import { PinturaEditor } from '@pqina/react-pintura'; import { processImage, getEditorDefaults } from '@pqina/pintura'; const editorDefaults = getEditorDefaults({ imageWriter: { targetSize: { width: 512, height: 512, fit: 'contain', }, postprocessImageData: (imageData) => new Promise((resolve, reject) => { // Create a canvas element to handle the imageData const canvas = document.createElement('canvas'); canvas.width = imageData.width; canvas.height = imageData.height; const ctx = canvas.getContext('2d'); ctx.putImageData(imageData, 0, 0); // Draw our watermark on top const watermark = new Image(); watermark.onload = () => { // how to draw the image to the canvas ctx.globalCompositeOperation = 'screen'; // draw the watermark in the top right corner ctx.drawImage( watermark, // the watermark x and y position imageData.width - 100 - 20, 20, // the watermark width and height 100, 40 ); // Get and return the modified imageData resolve( ctx.getImageData( 0, 0, imageData.width, imageData.height ) ); }; watermark.onerror = reject; watermark.crossOrigin = 'Anonymous'; watermark.src = './my-watermark.svg'; }), }, }); function App() { const [editorResult, setEditorResult] = useState(undefined); const handleEditorProcess = (imageState) => { setEditorResult(URL.createObjectURL(imageState.dest)); }; return (

{editorResult &&

}

); } export default App; ``` ```css .pintura-editor { height: 600px; } ``` * [App.vue](#App-vue-panel-0) ```html ``` * [App.svelte](#App-svelte-panel-0) ```svelte

{#if editorResult}

{/if}

``` * [app.component.ts](#app-component-ts-panel-0) * [app.component.html](#app-component-html-panel-0) * [app.component.css](#app-component-css-panel-0) * [app.module.ts](#app-module-ts-panel-0) ```javascript import { Component } from '@angular/core'; import { DomSanitizer } from '@angular/platform-browser'; import { processImage, getEditorDefaults } from '@pqina/pintura'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'], }) export class AppComponent { constructor(private domSanitizer: DomSanitizer) {} editorResult?: string = undefined; editorDefaults: any = getEditorDefaults({ imageWriter: { targetSize: { width: 512, height: 512, fit: 'contain', }, postprocessImageData: (imageData) => new Promise((resolve, reject) => { // Create a canvas element to handle the imageData const canvas = document.createElement('canvas'); canvas.width = imageData.width; canvas.height = imageData.height; const ctx = canvas.getContext('2d'); ctx.putImageData(imageData, 0, 0); // Draw our watermark on top const watermark = new Image(); watermark.onload = () => { // how to draw the image to the canvas ctx.globalCompositeOperation = 'screen'; // draw the watermark in the top right corner ctx.drawImage( watermark, // the watermark x and y position imageData.width - 100 - 20, 20, // the watermark width and height 100, 40 ); // Get and return the modified imageData resolve( ctx.getImageData( 0, 0, imageData.width, imageData.height ) ); }; watermark.onerror = reject; watermark.crossOrigin = 'Anonymous'; watermark.src = './my-watermark.svg'; }), }, }); handleEditorProcess(imageState: any): void { this.editorResult = ( this.domSanitizer.bypassSecurityTrustResourceUrl( URL.createObjectURL(imageState.dest) ) ); } } ``` ```html ``` ```css ::ng-deep .pintura-editor { height: 600px; } ``` ```javascript import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { AngularPinturaModule } from '@pqina/angular-pintura'; @NgModule({ declarations: [AppComponent], imports: [BrowserModule, AngularPinturaModule], exports: [AppComponent], providers: [], bootstrap: [AppComponent], }) export class AppModule {} ``` * [index.html](#index-html-panel-0) ```html

```