Wayland and weston

Origin link 2023-4-10

• Wayland
• see overview: Wayland Weston overview
• Wayland is a communication protocol that specifies the communication between a display server and its clients, from wikipedia
• Weston is the reference implementation of a Wayland compositor, from weston github.
  
  
  
  
  
• Weston
• backends, from "man weston"
• drm-backend.so: The DRM backend uses Linux KMS for output and evdev devices for input
• wayland-backend.so: The  Wayland  backend  runs on another Wayland server, a different Weston instance
• x11-backend.so: The X11 backend runs on an X server
• rdp-backend.so: The  RDP backend runs in memory without the need of graphical hardware.
• to run weston from wsl2, use wayland-backend.so.
• to run weston for rdp connection, use rdp-backend.so
• all for drm connector, see "/sys/class/drm"
• modules/shell
• all *.so are located at usr/lib/weston for modules and shell in weston.ini
• weston terminal
• weston-terminal doesn't display correct Chinese characters with font alias
• scale: scale text for high DPI screen
• GDK setting for GTK application from application level
• export GDK_BACKEND=wayland
• #To scale UI elements by an integer only factor
• #GTK3/4 does not support fractional scaling currently, so fractional factors will be ignored
• export GDK_SCALE=1
• #GDK_DPI_SCALE can be used to scale text only
• export GDK_DPI_SCALE=1.2
• composition level
• "[output]" on weston.ini, only work for drm and X11. set "scale=1.5".