shutterstock / changedpi Goto Github PK

I'd like to be able to use this util library using the latest JS ecosystem. To do this, it would be good if this library was published to npm or yarn.

Expected behavior

Actual behavior

Steps to reproduce the behavior

Additional specs (e.g. browser, version, etc.)

The image in the test file has not changed since the conversion. I don't know why.

Can this library be used in the classic JS script without importing?

When I pass the attached PNG image in changeDpiDataUrl(), it returns an invalid PNG. It's easy to reproduce:

var res = changeDpiDataUrl(attached_png, 300);

'res' will be a badly formed PNG image.

I don't fully understand the code, but it looks like detectPhysChunkFromDataUrl() cannot find what it's looking for, so it returns -1. The calling code checks if the return value is truthy; -1 is, so the header length calculation is wrong.

base64_png.txt

Is there a way to take an image uploaded by the user and get their dpi value in client side (without any server call)?

I would like to contribute with improvements in documentation such as README, CHANGELOG and also translate to Brazilian Portuguese.

Getting Uncaught ReferenceError: exports is not defined upon loading my webapp

Details

Angular 12 webapp
In package.json: "changedpi": "^1.0.4",
"node_modules/changedpi/dist/index.js" added to angular.json under architect.build.scripts
declare module 'changedpi' added to src/typings.d.ts
Imported into component using import * as changedpi from 'changedpi';

Upon loading webapp:

Clicking on error shows source:

Can anyone advise if I've integrated incorrectly, or if there's an underlying issue in the library?

I want to improve the quality of an image, but I am not able to display the image generated with the changeDpiDataUrl function. The error I get is "Failed to load resource: Data URL decoding failed".
Without using the base64header, I have no problems. But as soon as the base64header is included, my browser is not able to resolve the image.
My function looks like this

Has anyone had the same problem and knows a solution?

Is it correct that you can only use jpeg, I am trying to use this project with data urls encoded in image/png?!

Expected behavior

I was expecting this module to work on Node.js, am I wrong?

Actual behavior

It throws an error because of: FileReader is not defined

Steps to reproduce the behavior

Additional specs (e.g. browser, version, etc.)