HiDPI is very common nowadays. Internally Emacs has decent support for HiDPI displays. However elisp code, that generates non-svg images don't have any idea that logical pixel may differ from physical one, resulting in generating images in low resolution on HiDPI displays.
Emacs internally has a notion about HiDPI displays, such as `x_get_scale_factor`, maybe expose this function to elisp level, so packages may utilize it to generate images in highres?
Or `(> (round (/ (display-pixel-height) (/ (display-mm-height) 25.4))) 96)` is good enough to detect HiDPI displays?
Thanks