[rcore] [SDL2] Add implementation for `FLAG_WINDOW_ALWAYS_RUN` (#4598)

* Enable FLAG_WINDOW_ALWAYS_RUN by default on PLATFORM_DESKTOP_GLFW

* Revert enabling FLAG_WINDOW_ALWAYS_RUN by default on PLATFORM_DESKTOP_GLFW

* Add implementation for FLAG_WINDOW_ALWAYS_RUN on PLATFORM_DESKTOP_SDL

* Add reset for GetFrameTime()

src/platforms/rcore_desktop_glfw.c

@@ -1739,7 +1739,12 @@ static void WindowContentScaleCallback(GLFWwindow *window, float scalex, float s
 static void WindowIconifyCallback(GLFWwindow *window, int iconified)
 {
     if (iconified) CORE.Window.flags |= FLAG_WINDOW_MINIMIZED;  // The window was iconified
-    else CORE.Window.flags &= ~FLAG_WINDOW_MINIMIZED;           // The window was restored
+    else
+    {
+        CORE.Window.flags &= ~FLAG_WINDOW_MINIMIZED;           // The window was restored
+
+        if ((CORE.Window.flags & FLAG_WINDOW_ALWAYS_RUN) == 0) CORE.Time.previous = GetTime();
+    }
 }
 
 // GLFW3 WindowMaximize Callback, runs when window is maximized/restored

src/platforms/rcore_desktop_sdl.c

@@ -571,7 +571,7 @@ void SetWindowState(unsigned int flags)
     }
     if (flags & FLAG_WINDOW_ALWAYS_RUN)
     {
-        TRACELOG(LOG_WARNING, "SetWindowState() - FLAG_WINDOW_ALWAYS_RUN is not supported on PLATFORM_DESKTOP_SDL");
+        CORE.Window.flags |= FLAG_WINDOW_ALWAYS_RUN;
     }
     if (flags & FLAG_WINDOW_TRANSPARENT)
     {
@@ -658,7 +658,7 @@ void ClearWindowState(unsigned int flags)
     }
     if (flags & FLAG_WINDOW_ALWAYS_RUN)
     {
-        TRACELOG(LOG_WARNING, "ClearWindowState() - FLAG_WINDOW_ALWAYS_RUN is not supported on PLATFORM_DESKTOP_SDL");
+        CORE.Window.flags &= ~FLAG_WINDOW_ALWAYS_RUN;
     }
     if (flags & FLAG_WINDOW_TRANSPARENT)
     {
@@ -1378,6 +1378,8 @@ void PollInputEvents(void)
 
     CORE.Window.resizedLastFrame = false;
 
+    if (((CORE.Window.flags & FLAG_WINDOW_MINIMIZED) > 0) && ((CORE.Window.flags & FLAG_WINDOW_ALWAYS_RUN) == 0)) SDL_WaitEvent(NULL);
+
     SDL_Event event = { 0 };
     while (SDL_PollEvent(&event) != 0)
     {
@@ -1497,6 +1499,8 @@ void PollInputEvents(void)
                             if ((CORE.Window.flags & SDL_WINDOW_MAXIMIZED) > 0) CORE.Window.flags &= ~SDL_WINDOW_MAXIMIZED;
                         }
                         #endif
+
+                        if ((CORE.Window.flags & FLAG_WINDOW_ALWAYS_RUN) == 0) CORE.Time.previous = GetTime();
                     } break;
 
                     case SDL_WINDOWEVENT_HIDDEN: