Is it possible to create a tile 2x2 mosaic?

[Simoneth]

Question about an existing feature

Tile

What are you trying to achieve?

I need to make a mosaic 2x2 from an array of 4 images...this is for a Lambda Function.
https://stackoverflow.com/questions/71436457/is-it-possible-to-create-a-tile-2x2-mosaic-using-sharp-node

When you searched for similar issues, what did you find that might be related?

I found only this one: https://stackoverflow.com/questions/66698647/sharp-composite-tiling-center

Please provide a minimal, standalone code sample, without other dependencies, that demonstrates this question

In Image Magick I do this:
montage -density 300 -tile 2x0 -geometry 150x150^ -gravity center -crop 150x150+0+0 -border 0 '.$img_array.' /var/www/html/uploads/output.jpg

instead in Sharp I'm able to do only this:

const sharpImage = sharp({
  create: {
    width,
    height,
    channels: 4,
    background: { r: 0, g: 0, b: 0 }
  }
}).composite([{ input: image, tile: true, gravity: 'center' }]).png

That produce a 2x2 mosaic of the same image.

Please provide sample image(s) that help explain this question

https://i.stack.imgur.com/1i72U.jpg

[lovell]

Please see #1580 - please can you update your Stack Overflow question with this info too.

(As an aside, props for including the cover of Weiss' Feel My Needs in your sample image 👍 )

[Simoneth]

Hi,
I need this for a Lambda function, so I'm a bit lost at the moment...from your answer it looks like I have to use libvips library because there's no "join" API for Sharp yet.

The problem with this solution is that it can't be developed in Lambda...or am I missing something?
Thanks!

[lovell]

#1580 is a future possible enhancement with some suggested alternative approaches for now. For example, did you see #1580 (comment) ? Let's continue to track this at #1580.

[Simoneth]

Hi,
I found some time to post my answer.
https://stackoverflow.com/questions/71436457/is-it-possible-to-create-a-tile-2x2-mosaic-using-sharp-node/71924392#71924392

Thanks again!