DPI issues in a multi-monitor setup

[rnhmjoj]

DPI is an area where bspwm could see some improvements, particularly when using a multi-monitor setup with different DPI values. For example:

1. border_width and window_gap are globals and given in pixels. This means they can result in widely different physical sizes when using a typical 96dpi along side and a high DPI (say 200dpi) monitor. To achieve consistency, I can think of two options:

   • change the settings to use points instead of pixels and scale them based on the pixel-density,
   • make the settings per-monitor, allowing the user to specify different pixel sizes.

2. similarly, bspc node commands --resize, --move are in pixels, so they are inconsistent across different monitors.

3. when dragging or sending a window to another monitor the physical dimensions are not preserved. the window should be scaled.