image-resizing | query string version of Cloudflare Image Resizing | Key Value Database library

I have an image in the form of a buffer in NODEjs, and I want to resize it.

Theoretically this should be able to be done in nodeJS, since I have access to the buffer, which contains all of the pixel data.

I have looked many places to find a simple way to resize an image using NATIVE (only!) nodejs, with no external libraries, but I have only found solutions that use libraries: https://www.npmjs.com/package/gm

Node gm - resize image and preserve aspect ratio?

Node.js: image resizing without ImageMagick Easy way to resize image in Node.js?

How to resize an image in Node.js?

How to resize image in Node js

Node.js Resize Image

Resize image in node js

Download image and resize in nodejs

Resizing images with Nodejs and Imagemagick

Resize image to exact size by maintaining aspect ratio nodejs

How to resize images on node.js

Resize and crop image and keeping aspect ratio NodeJS & gm

How to resize image size in nodejs using multer

try to resize the stream image with sharp Node.js

Node.js: image resizing without ImageMagick

resize an image without uploading it to anywhere using gm in nodejs

Resize an image in Node.js using jimp and get the path the new image

but ALL of these solutions use some kind of library, but I want to only use plain NodeJS.

I can read the pixels with a Buffer, so I should be able to write a resized Buffer, like this C++ thread http://www.cplusplus.com/forum/general/2615/ and many others, that simply loop through the pixels and resize it..

I found this question Resizing an image in an HTML5 canvas which implemented image resizing with pure client-side JavaScript, without depending on the canvas drawImage to resize it (only to get the image data), this was the code he used:

I'm looking for a way to resize videos by adding a white background instead of changing its proportions.

(A video with proportions 250x300px would transform to 300x300px by adding white band on each side of the video)

I've tried implementing the code I found on this thread to no result using ffmpeg, I'm very noob with image/video processing: Thread

I am trying to install a lambda function as shown on this blog...

https://www.obytes.com/blog/image-resizing-on-the-fly-with-aws-lambda-api-gateway-and-s3-storage

I followed these steps, uploaded the zip file and getting an error.

I followed all the instructions from this guide.

https://www.obytes.com/blog/image-resizing-on-the-fly-with-aws-lambda-api-gateway-and-s3-storage

I got the URL after deploying the api gateway.

https://azqvbborn5.execute-api.us-east-1.amazonaws.com/dev

But getting this error when I visit the page mentioned above.

When using the sharp image resize library https://github.com/lovell/sharp for node.js, the image is being rotated.

I have no code thats says .rotate(), so why is it being rotated and how can I stop it from rotating?

I'm using the serverless-image-resizing example provided by AWS: https://github.com/awslabs/serverless-image-resizing that uses lambda to resize images on the fly if the thumbnail does not exist

So, I have an art website, with each work getting its own page. The works are mostly photos, meaning they have higher resolutions than most screens are capable of displaying - so they need to be resized down to scale, obviously.

To make works easier to look through, I display them such that they take up most of the screen (minus 100px in either dimension), scaling to fill whichever dimension is more limiting:

• Work X is square-shaped, and on the average monitor it gets resized so that its height fills the entire vertical space, and its width scales accordingly - preserving the aspect ratio
• Work Y is tapestry-shaped, and gets resized so that its width fills the entire horizontal space, and its vertical space gets resized to match that aspect ratio.

I'm currently using a straightforward Javascript script for this, calling a function on the img tag's onload (as well as whenever the window is resized) to calculate the desired width/height of the image and apply that. The problem with using Javascript for this is that there's a delay between when the image begins to load and when it resizes, which makes the page look really ugly for a while, especially when viewing the site on a poor internet connection.

Leading to my question: is there a way to resize images to a certain percentage of screen size, while preserving aspect ratio, in pure CSS?

This answer provides another Javascript solution, but I'd prefer to find a way to do this in pure CSS if possible.

My current script is this:

I have following JS code (found here, on stackoverflow, and a little-bit modded), which resize image on client side using canvas.

I've just done this, makes images stored on s3 being resized on request and it works as charm: https://aws.amazon.com/tw/blogs/compute/resize-images-on-the-fly-with-amazon-s3-aws-lambda-and-amazon-api-gateway/

And I've just started reading articles of Lambda Edge: http://docs.aws.amazon.com/lambda/latest/dg/lambda-edge.html

But I'm still not sure what I should do with events: Viewer Request, Origin Request, Origin Response and Viewer Response.

The lambda function with gateway trigger I use for now is https://github.com/awslabs/serverless-image-resizing

I followed this blog https://aws.amazon.com/blogs/compute/resize-images-on-the-fly-with-amazon-s3-aws-lambda-and-amazon-api-gateway/

and this repo https://github.com/awslabs/serverless-image-resizing

To be able to resize images on AWS S3 on the fly. The bucket is created successfully. Whenever I upload image to the bucket, I can resize it from the url as indicated in the blog, everything works fine.

The problem is when an image is uploaded from the code (Ruby on Rails using paperclip), then the image can be accessed normally, however when trying with resizing url (e.g. /100x200/photo.png) I receive this in the browser as json response