pdf-lib adding non existing border to pdf

What were you trying to do?

I'm creating a pdf and adding a png with transparent background to it.

pdf-lib is adding a border to the image. This can be seen when opening the pdf in chrome both in linux and mac.

How did you attempt to do it?


const {PDFDocument} = require('pdf-lib')
const fs = require('fs/promises')
main()
    .then(function () {
        console.log('finished')
    }, function (err) {
        console.error('error', err)
    })
async function main () {
    const doc = await PDFDocument.create()
    const buffer = await fs.readFile('./image-without-border.png')
    const page = doc.addPage()

    const pdfImage = await doc.embedPng(buffer)
    page.drawImage(pdfImage, {
        x: 0,
        y: 0,
        width: page.getWidth(),
        height: page.getHeight()
    })
    const exportedPage = await doc.save()
    await fs.writeFile('example.pdf', exportedPage)
}

Embedded image image-without-border

Result: example.pdf

What actually happened?

The pdf shows a border in the png

What did you expect to happen?

The image that I'm attaching has no border so it should not add a border to the pdf

How can we reproduce the issue?

I've added the code in "How did you attempt" sesion.

Version

1.17.1

What environment are you running pdf-lib in?

Node

Checklist

[X] My report includes a Short, Self Contained, Correct (Compilable) Example.
[X] I have attached all PDFs, images, and other files needed to run my SSCCE.

Additional Notes

No response

Hopding / pdf-lib

pdf-lib adding non existing border to pdf #1510