Using drupal_image for image in theme

I'm not sure this can be done, but I'm trying to insert a responsive image in a twig template, using Twig Tweak's drupal_image function, but with a image in my theme's images folder.

I've tried:
{{ drupal_image(path_to_img, 'responsive_style', {alt: 'Alternative text', title: 'The title'}, true) }}

and
{{ drupal_image(path_to_img, 'responsive_style', responsive=true) }}

Both options output nothing. I know that my path is correct because it works with plain image (ie <img src="{{ path_to_img }}">). Is there any way to get this function to work with more than files with a public URI? Or is there a way to convert a path to a theme image to a public URI? Or am I missing something?

If this can't done it would certainly be a good feature request.

Thanks!