Handle window events from screen.c

Only the screen knows what to do on window events.

This paves the way to handle more window events.

app/src/scrcpy.c

@@ -144,12 +144,7 @@ handle_event(SDL_Event *event, bool control) {
             }
             break;
         case SDL_WINDOWEVENT:
-            switch (event->window.event) {
-                case SDL_WINDOWEVENT_EXPOSED:
-                case SDL_WINDOWEVENT_SIZE_CHANGED:
-                    screen_render(&screen);
-                    break;
-            }
+            screen_handle_window_event(&screen, &event->window);
             break;
         case SDL_TEXTINPUT:
             if (!control) {

app/src/screen.c

@@ -327,3 +327,14 @@ screen_resize_to_pixel_perfect(struct screen *screen) {
         LOGD("Resized to pixel-perfect");
     }
 }
+
+void
+screen_handle_window_event(struct screen *screen,
+                           const SDL_WindowEvent *event) {
+    switch (event->event) {
+        case SDL_WINDOWEVENT_EXPOSED:
+        case SDL_WINDOWEVENT_SIZE_CHANGED:
+            screen_render(screen);
+            break;
+    }
+}

app/src/screen.h

@@ -76,4 +76,8 @@ screen_resize_to_fit(struct screen *screen);
 void
 screen_resize_to_pixel_perfect(struct screen *screen);
 
+// react to window events
+void
+screen_handle_window_event(struct screen *screen, const SDL_WindowEvent *event);
+
 #endif