37 lines
2.1 KiB
Markdown
37 lines
2.1 KiB
Markdown
Wayland
|
|
=======
|
|
Wayland is a replacement for the X11 window system protocol and architecture and is favored over X11 by default in SDL3
|
|
for communicating with desktop compositors. It works well for the majority of applications, however, applications may
|
|
encounter limitations or behavior that is different from other windowing systems.
|
|
|
|
## Common issues:
|
|
|
|
### Window decorations are missing, or the decorations look strange
|
|
|
|
- On some desktops (i.e. GNOME), Wayland applications use a library
|
|
called [libdecor](https://gitlab.freedesktop.org/libdecor/libdecor) to provide window decorations. If this library is
|
|
not installed, the decorations will be missing. This library uses plugins to generate different decoration styles, and
|
|
if a plugin to generate native-looking decorations is not installed (i.e. the GTK plugin), the decorations will not
|
|
appear to be 'native'.
|
|
|
|
### Windows do not appear immediately after creation
|
|
|
|
- Wayland requires that the application initially present a buffer before the window becomes visible. Additionally,
|
|
applications _must_ have an event loop and processes messages on a regular basis, or the application can appear
|
|
unresponsive to both the user and desktop compositor.
|
|
|
|
### ```SDL_SetWindowPosition()``` doesn't work on non-popup windows
|
|
|
|
- Wayland does not allow toplevel windows to position themselves programmatically.
|
|
|
|
### Retrieving the global mouse cursor position when the cursor is outside a window doesn't work
|
|
|
|
- Wayland only provides applications with the cursor position within the borders of the application windows. Querying
|
|
the global position when an application window does not have mouse focus returns 0,0 as the actual cursor position is
|
|
unknown. In most cases, applications don't actually need the global cursor position and should use the window-relative
|
|
coordinates as provided by the mouse movement event or from ```SDL_GetMouseState()``` instead.
|
|
|
|
### Warping the global mouse cursor position via ```SDL_WarpMouseGlobal()``` doesn't work
|
|
|
|
- For security reasons, Wayland does not allow warping the global mouse cursor position.
|