* Allow dynamic screen size change on windows

platforms/windows/main.cpp

@@ -158,6 +158,9 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
 
 			g_AppPlatform.setScreenSize(width, height);
 
+			if (g_pApp)
+				g_pApp->sizeUpdate(width, height);
+
 			break;
 		}
 		case WM_KEYDOWN:

source/App.cpp

@@ -57,3 +57,7 @@ void App::update()
 {
 
 }
+
+void App::sizeUpdate(int newWidth, int newHeight)
+{
+}

source/App.hpp

@@ -14,15 +14,17 @@ class App
 {
 
 public:
-	void destroy();
-	void draw();
 	virtual bool handleBack(bool);
 	virtual void init();
+	virtual void update();
+	virtual void sizeUpdate(int newWidth, int newHeight);
+
+	void destroy();
+	void draw();
 	void loadState(void*, int);
 	AppPlatform* platform();
 	void quit();
 	void saveState(void**, int);
-	virtual void update();
 	bool wantToQuit();
 
 public:

source/Minecraft.cpp

@@ -773,6 +773,35 @@ void Minecraft::prepareLevel(const std::string& unused)
 	// " - prepr: ";
 }
 
+void Minecraft::sizeUpdate(int newWidth, int newHeight)
+{
+	// re-calculate the GUI scale.
+	Gui::InvGuiScale = getBestScaleForThisScreenSize(newWidth, newHeight);
+
+	if (m_pScreen)
+		m_pScreen->setSize(int(newWidth * Gui::InvGuiScale), int(newHeight * Gui::InvGuiScale));
+}
+
+float Minecraft::getBestScaleForThisScreenSize(int width, int height)
+{
+	// phones only
+#if !defined(_WIN32) && !defined(USE_SDL2)
+	if (width > 1000)
+		return 1.0f / 4.0f;
+
+	if (width > 800)
+		return 1.0f / 3.0f;
+#else
+	if (width > 1000)
+		return 1.0f / 3.0f;
+#endif
+
+	if (width > 400)
+		return 1.0f / 2.0f;
+
+	return 1.0f;
+}
+
 void Minecraft::generateLevel(const std::string& unused, Level* pLevel)
 {
 	float time = getTimeS(); //@UNUSED

source/Minecraft.hpp

@@ -60,13 +60,15 @@ public:
 	virtual void onGraphicsReset();
 	virtual void update() override;
 	virtual void init() override;
+	virtual void sizeUpdate(int newWidth, int newHeight) override;
 
-	static void* prepareLevel_tspawn(void* pMinecraft);
+	float getBestScaleForThisScreenSize(int width, int height);
 	void generateLevel(const std::string& unused, Level* pLevel);
 	void prepareLevel(const std::string& unused);
 	void _levelGenerated();
 	bool isOnline();
 	bool isOnlineClient();
+	static void* prepareLevel_tspawn(void* pMinecraft);
 
 	const char* getProgressMessage();
 	LevelStorageSource* getLevelSource();

source/client/gui/Screen.cpp

@@ -173,6 +173,11 @@ void Screen::setSize(int width, int height)
 {
 	m_width = width;
 	m_height = height;
+
+	// not original code. Will need to re-init again
+	m_buttons.clear();
+	m_textInputs.clear();
+	init();
 }
 
 void Screen::updateEvents()

windows_vs/options.txt

@@ -5,4 +5,4 @@ ctrl_invertmouse|false
 gfx_fancygraphics|true
 mp_server_visible_default|true
 gfx_smoothlighting|true
-gfx_viewdistance|2
+gfx_viewdistance|3