treewide: add Wayland and SDL2 backends

f0rmz/README.md

@@ -115,6 +115,7 @@ hostname=mydevice
 - [libinput] - Input device handling  
 - [libudev] - Device enumeration
 - [libxkbcommon] - Keyboard layout support
+- [libdrm] - DRM backend
 - evdev kernel module
 
 ## Backends

f0rmz/lv_conf.h

@@ -1159,7 +1159,8 @@
  *==================*/
 
 /** Use SDL to open window on PC and handle mouse and keyboard. */
-#define LV_USE_SDL              0
+// LV_USE_SDL is defined dynamically via meson.build so we must not define it here
+// #define LV_USE_SDL              0
 #if LV_USE_SDL
     #define LV_SDL_INCLUDE_PATH     <SDL2/SDL.h>
     #define LV_SDL_RENDER_MODE      LV_DISPLAY_RENDER_MODE_DIRECT   /**< LV_DISPLAY_RENDER_MODE_DIRECT is recommended for best performance */
@@ -1231,6 +1232,7 @@
 #endif
 
 /** Driver for /dev/dri/card */
+// LV_USE_LINUX_DRM is defined dynamically via meson.build so we must not define it here
 //#define LV_USE_LINUX_DRM        0
 
 #if LV_USE_LINUX_DRM

f0rmz/meson.build

@@ -23,6 +23,13 @@ else
     f0rmz_args += '-DLV_USE_LINUX_DRM=0'
 endif
 
+if deplibsdl.found()
+    f0rmz_dependencies += deplibsdl
+    f0rmz_args += '-DLV_USE_SDL=1'
+else
+    f0rmz_args += '-DLV_USE_SDL=0'
+endif
+
 executable('f0rmz',
     include_directories: common_include_dirs,
     sources: f0rmz_sources + shared_sources + shared_sources_ul_f0 + squeek2lvgl_sources + lvgl_sources,