Day 32 done.

sdl_handmade.c

@@ -254,6 +254,13 @@ static void SDLProcessInputDigitalButton(SDL_GameController *Controller,
 
 static void HandleEvent(SDL_Event *Event)
 {
+    /* TODO: Should this be below scopes? */
+    SDL_Window *Window;
+    SDL_Renderer *Renderer;
+
+    Window = SDL_GetWindowFromID(Event->window.windowID);
+    Renderer = SDL_GetRenderer(Window);
+
     switch(Event->type) {
         case SDL_QUIT: {
             GlobalRunning = FALSE;
@@ -262,13 +269,8 @@ static void HandleEvent(SDL_Event *Event)
         case SDL_WINDOWEVENT: {
             switch(Event->window.event) {
                 case SDL_WINDOWEVENT_SIZE_CHANGED: {
-                    SDL_Window *Window;
-                    SDL_Renderer *Renderer;
                     sdl_window_dimension Dimension;
 
-                    Window = SDL_GetWindowFromID(Event->window.windowID);
-                    Renderer = SDL_GetRenderer(Window);
-
                     Dimension = SDLGetWindowDimension(Window);
                     SDLResizeTexture(&GlobalBackbuffer, Renderer,
                                      Dimension.Width, Dimension.Height);
@@ -276,6 +278,18 @@ static void HandleEvent(SDL_Event *Event)
 
                 case SDL_WINDOWEVENT_EXPOSED: {
                 } break;
+
+                case SDL_WINDOWEVENT_FOCUS_GAINED: {
+                    if(SDL_SetWindowOpacity(Window, 1.0f) != 0) {
+                        /* TODO: This didn't work . . . SDL_GetError() */
+                    }
+                } break;
+
+                case SDL_WINDOWEVENT_FOCUS_LOST: {
+                    if(SDL_SetWindowOpacity(Window, 0.5f) != 0) {
+                        /* TODO: This didn't work . . . SDL_GetError() */
+                    }
+                } break;
             }
         } break;
     }
@@ -611,9 +625,13 @@ S32 main(S32 argc, char *argv[])
 
     SDLInitControllers();
 
+    /* NOTE: Floating windows are not supported oficially by Wayland
+     *       protocol. However, SDL_WINDOW_ALWAYS_ON_TOP does work on KDE
+     *       under Wayland. I have not tested GNOME. */
     Window = SDL_CreateWindow("Handmade Hero", SDL_WINDOWPOS_UNDEFINED,
                               SDL_WINDOWPOS_UNDEFINED, 700, 500,
-                              SDL_WINDOW_RESIZABLE);
+                              SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALWAYS_ON_TOP);
+
     if(Window) {
         SDL_Renderer *Renderer;