117 lines
3.7 KiB
Markdown
117 lines
3.7 KiB
Markdown
# Wayland display and input driver
|
|
|
|
Wayland display and input driver, with support for keyboard, pointer (i.e. mouse) and touchscreen.
|
|
Keyboard support is based on libxkbcommon.
|
|
|
|
Following shell are supported:
|
|
|
|
* wl_shell (deprecated)
|
|
* xdg_shell
|
|
|
|
> xdg_shell requires an extra build step; see section _Generate protocols_ below.
|
|
|
|
|
|
Basic client-side window decorations (simple title bar, minimize and close buttons)
|
|
are supported, while integration with desktop environments is not.
|
|
|
|
|
|
## Install headers and libraries
|
|
|
|
### Ubuntu
|
|
|
|
```
|
|
sudo apt-get install libwayland-dev libxkbcommon-dev libwayland-bin wayland-protocols
|
|
```
|
|
|
|
### Fedora
|
|
|
|
```
|
|
sudo dnf install wayland-devel libxkbcommon-devel wayland-utils wayland-protocols-devel
|
|
```
|
|
|
|
|
|
## Generate protocols
|
|
|
|
Support for non-basic shells (i.e. other than _wl_shell_) requires additional
|
|
source files to be generated before the first build of the project. To do so,
|
|
navigate to the _wayland_ folder (the one which includes this file) and issue
|
|
the following commands:
|
|
|
|
```
|
|
cmake .
|
|
make
|
|
```
|
|
|
|
|
|
## Build configuration under Eclipse
|
|
|
|
In "Project properties > C/C++ Build > Settings" set the followings:
|
|
|
|
- "Cross GCC Compiler > Command line pattern"
|
|
- Add ` ${wayland-cflags}` and ` ${xkbcommon-cflags}` to the end (add a space between the last command and this)
|
|
|
|
|
|
- "Cross GCC Linker > Command line pattern"
|
|
- Add ` ${wayland-libs}` and ` ${xkbcommon-libs}` to the end (add a space between the last command and this)
|
|
|
|
|
|
- In "C/C++ Build > Build variables"
|
|
- Configuration: [All Configuration]
|
|
|
|
- Add
|
|
- Variable name: `wayland-cflags`
|
|
- Type: `String`
|
|
- Value: `pkg-config --cflags wayland-client`
|
|
- Variable name: `wayland-libs`
|
|
- Type: `String`
|
|
- Value: `pkg-config --libs wayland-client`
|
|
- Variable name: `xkbcommon-cflags`
|
|
- Type: `String`
|
|
- Value: `pkg-config --cflags xkbcommon`
|
|
- Variable name: `xkbcommon-libs`
|
|
- Type: `String`
|
|
- Value: `pkg-config --libs xkbcommon`
|
|
|
|
|
|
## Init Wayland in LVGL
|
|
|
|
1. In `main.c` `#incude "lv_drivers/wayland/wayland.h"`
|
|
2. Enable the Wayland driver in `lv_drv_conf.h` with `USE_WAYLAND 1` and
|
|
configure its features below, enabling at least support for one shell.
|
|
3. `LV_COLOR_DEPTH` should be set either to `32` or `16` in `lv_conf.h`;
|
|
support for `8` and `1` depends on target platform.
|
|
4. After `lv_init()` call `lv_wayland_init()`.
|
|
5. Add a display (or more than one) using `lv_wayland_create_window()`,
|
|
possibly with a close callback to track the status of each display:
|
|
```c
|
|
#define H_RES (800)
|
|
#define V_RES (480)
|
|
|
|
/* Create a display */
|
|
lv_disp_t * disp = lv_wayland_create_window(H_RES, V_RES, "Window Title", close_cb);
|
|
```
|
|
As part of the above call, the Wayland driver will register four input devices
|
|
for each display:
|
|
- a KEYPAD connected to Wayland keyboard events
|
|
- a POINTER connected to Wayland touch events
|
|
- a POINTER connected to Wayland pointer events
|
|
- a ENCODER connected to Wayland pointer axis events
|
|
Handles for input devices of each display can be get using respectively
|
|
`lv_wayland_get_indev_keyboard()`, `lv_wayland_get_indev_touchscreen()`,
|
|
`lv_wayland_get_indev_pointer()` and `lv_wayland_get_indev_pointeraxis()`, using
|
|
`disp` as argument.
|
|
5. After `lv_deinit()` (if used), or in any case during de-initialization, call
|
|
`lv_wayland_deinit()`.
|
|
|
|
### Fullscreen mode
|
|
|
|
In order to set one window as fullscreen or restore it as a normal one,
|
|
call the `lv_wayland_window_set_fullscreen()` function respectively with `true`
|
|
or `false` as `fullscreen` argument.
|
|
|
|
### Disable window client-side decoration at runtime
|
|
|
|
Even when client-side decorations are enabled at compile time, they can be
|
|
disabled at runtime setting the `LV_WAYLAND_DISABLE_WINDOWDECORATION`
|
|
environment variable to `1`.
|