![]() ![]() (C2) Define the “text settings” as usual, then use ctx.measureText() to get the text box dimensions.Lastly, centering the text is unfortunately Mathematical. Y = Math.floor((img.naturalHeight - th) / 2) Let x = Math.floor((img.naturalWidth - tw) / 2), (C3) CALCULATE CENTER & WRITE ON CENTER Th = td.actualBoundingBoxAscent + td.actualBoundingBoxDescent This project consists of three parts: Now Playing, Upcoming Releases, Genres.) Ĭonst canvas = createCanvas(img.width, img.height), To run the project, let’s run npm run start Git clone We need to get all the packages need for this project including purejswatermark. However, if you want to add this number to something, you'll need it to be a number, so you. For example, if a user enters a number into a form's text field, it's a string. These constructs can be really useful in some situations. Let’s get the project through the link provided above Try this: const myNum2 123 const myString2 myNum2.toString() console.log(typeof myString2) Copy to Clipboard.This example project is inspired by Paige Niedringhaus’s movie demo. If you are new to React, I recommend you to read the book by Robin Wieruch. To get a better idea on how to use purejswatermark, we will go through an example project which can be found here. To add a logo: const options = ) //Text size ranging from 1 to 8 An example javascript project using purejswatermark import watermark from ‘purejswatermark/dist/watermark’ Then we want to import purejswatermark to the files you want to add watermark to images. Installed purejswatermark as a dependency in package.json You can find purejswatermark and updates here: How to use purejswatermark package in Node.js can be used in both front-end and back-endĪt the end of this article, you will know the basic usage of purejswatermark and will be able to add a watermark to your images.not rely on any third-party C/python etc codes. ![]() ![]() read image data (png, jpg, bmp) and then adds the text/watermark image onto the original image and then output a new image of the same type.Jimp comes with a lot of features that are beyond adding watermarks to images. However, Jimp-watermark is heavy for the task. I didn’t find a pure javascript based watermark package that can be used for both back-end and front-end which does not depend on browser, except Jimp-watermark. The shortcoming of browser based approach is that a smart user could bypass it. These third-party libraries require compilation on the back-end machine which also have start-up overhead.įor the front-end, there are many javascript packages using browser canvas or overlaying separate watermarking element on to subject assets. There exist back-end watermarking tools that are dependent on c libraries like FFmpeg, ImageMagick, INKSCAPE, lwIP, Cairo, and GraphicsMagick. I conducted research on existing packages that could achieve this feature. For organizations like magazines and newspapers that produce original content, watermark protects their business opportunities and revenues.Īs a web developer, I have been working on the implementation of the watermark feature. Watermarks can avoid theft or unauthorized use of your valuable digital works. If you want to protect your content and to claim ownership of an asset, you should know watermarks. Nowadays, a simple right-click allows people to download a huge amount of digital assets. Adding Watermark Using Pure Javascript With a Simple Node.js Package - purejswatermark
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