110 lines
3.1 KiB
Markdown
110 lines
3.1 KiB
Markdown
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# Wayland display and input driver
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Wayland display and input driver, with support for keyboard, mouse and touchscreen.
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Keyboard support is based on libxkbcommon.
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> NOTE: current implementation only supports `wl_shell` shell with no decorations.
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## Install headers and libraries
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### Ubuntu
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```
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sudo apt-get install libwayland-dev libxkbcommon-dev
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```
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### Fedora
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```
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sudo dnf install wayland-devel libxkbcommon-devel
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```
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## Build configuration under Eclipse
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In "Project properties > C/C++ Build > Settings" set the followings:
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- "Cross GCC Compiler > Command line pattern"
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- Add ` ${wayland-cflags}` and ` ${xkbcommon-cflags}` to the end (add a space between the last command and this)
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- "Cross GCC Linker > Command line pattern"
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- Add ` ${wayland-libs}` and ` ${xkbcommon-libs}` to the end (add a space between the last command and this)
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- "Cross GCC Linker > Libraries"
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- Add `pthread`
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- In "C/C++ Build > Build variables"
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- Configuration: [All Configuration]
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- Add
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- Variable name: `wayland-cflags`
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- Type: `String`
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- Value: `pkg-config --cflags wayland-client`
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- Variable name: `wayland-libs`
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- Type: `String`
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- Value: `pkg-config --libs wayland-client`
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- Variable name: `xkbcommon-cflags`
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- Type: `String`
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- Value: `pkg-config --cflags xkbcommon`
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- Variable name: `xkbcommon-libs`
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- Type: `String`
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- Value: `pkg-config --libs xkbcommon`
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## Init Wayland in LVGL
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1. In `main.c` `#incude "lv_drivers/wayland/wayland.h"`
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2. Enable the Wayland driver in `lv_drv_conf.h` with `USE_WAYLAND 1`
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3. `LV_COLOR_DEPTH` should be set either to `32` or `16` in `lv_conf.h`;
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support for `8` and `1` depends on target platform.
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4. After `lv_init()` call `wayland_init()`
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5. Before `lv_deinit()` call `wayland_deinit()`
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6. Add a display:
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```c
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static lv_disp_buf_t disp_buf1;
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static lv_color_t buf1[LV_HOR_RES_MAX * LV_VER_RES_MAX];
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lv_disp_buf_init(&disp_buf1, buf1, NULL, LV_HOR_RES_MAX * LV_VER_RES_MAX);
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/* Create a display */
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lv_disp_drv_t disp_drv;
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lv_disp_drv_init(&disp_drv);
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disp_drv.buffer = &disp_buf1;
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disp_drv.flush_cb = wayland_flush;
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```
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7. Add keyboard:
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```c
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lv_indev_drv_t indev_drv_kb;
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lv_indev_drv_init(&indev_drv_kb);
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indev_drv_kb.type = LV_INDEV_TYPE_KEYPAD;
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indev_drv_kb.read_cb = wayland_keyboard_read;
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lv_indev_drv_register(&indev_drv_kb);
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```
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8. Add touchscreen:
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```c
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lv_indev_drv_t indev_drv_touch;
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lv_indev_drv_init(&indev_drv_touch);
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indev_drv_touch.type = LV_INDEV_TYPE_POINTER;
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indev_drv_touch.read_cb = wayland_touch_read;
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lv_indev_drv_register(&indev_drv_touch);
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```
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9. Add mouse:
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```c
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lv_indev_drv_t indev_drv_mouse;
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lv_indev_drv_init(&indev_drv_mouse);
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indev_drv_mouse.type = LV_INDEV_TYPE_POINTER;
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indev_drv_mouse.read_cb = wayland_pointer_read;
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lv_indev_drv_register(&indev_drv_mouse);
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```
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10. Add mouse wheel as encoder:
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```c
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lv_indev_drv_t indev_drv_mousewheel;
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lv_indev_drv_init(&indev_drv_mousewheel);
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indev_drv_mousewheel.type = LV_INDEV_TYPE_ENCODER;
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indev_drv_mousewheel.read_cb = wayland_pointeraxis_read;
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lv_indev_drv_register(&indev_drv_mousewheel);
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```
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