‚thumb‘ method respecting aspect ratio

[S1SYPHOS]

Hey there,
since I couldn't find anything really targeting what I need, here's a thought: How about passing an aspect ratio to thumb, which makes it

1. take either width or height (if both specified, well, ignore height or so)
2. calculate width/height based on desired aspect ratio &
3. crop image accordingly?

$preset = [
  'width' => 200,
  'ratio' => '2/1' // .. or float
];
$thumb = $file->thumb($preset);

// $thumb->height() equals 100

I want to be able to specify a certain aspect ratio without having to fetch the preset's width or height attribute - doing this would remove the advantage of having presets in the first place.

Furthermore, using different srcset presets, manually calculating values for all sizes is just too tedious.

Maybe there's a simple(r) approach, feedback welcome as always.

Cheers,
S1SYPHOS