These is the cleanest way I found to fix #283. Alternatives include adding the current directory to the path somehow, either via enviroment variables (TEXINPUTS) or inside the preamble (\graphicspath). I don't think those are very robust across various operating systems and LaTeX engines.

The solution above fails if the user changes the current directory between creating the image and running Graphics, but at least in that case the error message is informative.

Hm, I am not sure this should be done unconditionally. For example, when you export to a .tex file you probably want to use a relative path if that is what you gave. It is only when previewing a file (and we use a temp folder) that the relative -> absolute translation should happen.

There could be some global flag that says whether we are currently previewing and print_tex could look at that for Graphics and decide to print the absolute path or the path as given there?