diff --git a/BBGE/Window_SDL1.cpp b/BBGE/Window_SDL1.cpp
index 60f91d0..88ce0dd 100644
--- a/BBGE/Window_SDL1.cpp
+++ b/BBGE/Window_SDL1.cpp
@@ -2,6 +2,7 @@
 #include <SDL.h>
 #include <assert.h>
 #include "OSFunctions.h"
+#include "Base.h"
 
 #define SDL2_BACKEND SDL_VERSION_ATLEAST(2,0,0)
 
@@ -9,21 +10,11 @@
 
 static Window *s_theWindow; // since SDL1 can only create a single window, keep it around to make sure only one exists.
 
-struct Backend
-{
-	Backend()
-		: win(NULL)
-	{}
-
-	SDL_Surface *win;
-};
-
-#define BACKEND (static_cast<Backend*>(_backend))
-#define WIN (BACKEND->win)
+#define WIN ((SDL_Surface*&)(_backend))
 
 void *Window::_initBackend()
 {
-	return new Backend;
+	return NULL;
 }
 
 void Window::_ctor()
@@ -34,17 +25,22 @@ void Window::_ctor()
 
 Window::~Window()
 {
-	delete BACKEND;
 	s_theWindow = NULL;
 }
 
-bool Window::_open(unsigned w, unsigned h, bool full, unsigned bpp, bool vsync, unsigned display, unsigned hz)
+bool Window::isOpen() const
+{
+	return !!WIN;
+}
+
+void Window::_open(unsigned w, unsigned h, bool full, unsigned bpp, bool vsync, unsigned display, unsigned hz)
 {
 	// ignored for SDL1
 	(void)display;
 	(void)hz;
 
-	assert(w && h);
+	if(!w) w = 800;
+	if(!h) h = 600;
 
 	// have to cast away constness, since SDL_putenv() might be #defined to
 	//  putenv(), which takes a (char *), and freaks out newer GCC releases
@@ -55,15 +51,21 @@ bool Window::_open(unsigned w, unsigned h, bool full, unsigned bpp, bool vsync,
 	SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, vsync);
 	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 
-	Uint32 flags = SDL_OPENGL;
+	Uint32 flags = SDL_OPENGL | SDL_ANYFORMAT;
 	if(full)
 		flags |= SDL_FULLSCREEN;
 	SDL_Surface *surf = SDL_SetVideoMode(w, h, bpp, flags);
 	if(!surf)
-		return false;
+		exit_error("SDL_SetVideoMode failed");
 
 	WIN = surf;
-	return true;
+
+	::initIcon(WIN);
+}
+
+void Window::_adjust(unsigned w, unsigned h, bool full, unsigned bpp, bool vsync, unsigned display, unsigned hz)
+{
+	_open(w, h, full, bpp, vsync, display, hz);
 }
 
 void Window::warpMouse(int x, int y)
@@ -86,11 +88,6 @@ void Window::setTitle(const char *s)
 	SDL_WM_SetCaption(s, s);
 }
 
-void Window::initIcon()
-{
-	::initIcon(WIN);
-}
-
 int Window::getDisplayIndex() const
 {
 	return -1;
@@ -106,5 +103,34 @@ bool Window::hasInputFocus() const
 	return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
 }
 
+void Window::_onEventImpl(const SDL_Event& ev)
+{
+	switch(ev.type)
+	{
+		case SDL_KEYDOWN:
+		{
+#if __APPLE__
+			if ((ev.key.keysym.sym == SDLK_q) && (ev.key.keysym.mod & KMOD_META))
+#else
+			if ((ev.key.keysym.sym == SDLK_F4) && (ev.key.keysym.mod & KMOD_ALT))
+#endif
+			{
+				onQuit();
+			}
+		}
+		break;
+
+		case SDL_VIDEORESIZE:
+			onResize(ev.resize.w, ev.resize.h);
+			break;
+	}
+}
+
+void Window::initSize()
+{
+	onResize(WIN->w, WIN->h);
+}
+
+
 
 #endif // !SDL2_BACKEND
diff --git a/BBGE/Window_SDL2.cpp b/BBGE/Window_SDL2.cpp
index 50e5fda..360651e 100644
--- a/BBGE/Window_SDL2.cpp
+++ b/BBGE/Window_SDL2.cpp
@@ -66,6 +66,7 @@ void Window::_open(unsigned w, unsigned h, bool full, unsigned bpp, bool vsync,
 #  endif
 	SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
 	SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+	SDL_SetHint("SDL_VIDEO_HIGHDPI_DISABLED", "1");
 
 	Uint32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE;
 	if(full)
@@ -178,32 +179,16 @@ void Window::warpMouse(int x, int y)
 	SDL_WarpMouseInWindow(WIN, x, y);
 }
 
-#ifndef KMOD_GUI
-#define KMOD_GUI KMOD_META
-#endif
-
 void Window::_onEventImpl(const SDL_Event& ev)
 {
 	switch(ev.type)
 	{
-#if 0
 		case SDL_KEYDOWN:
-		{
 #if __APPLE__
-#if SDL_VERSION_ATLEAST(2, 0, 0)
-			if ((ev.key.keysym.sym == SDLK_q) && (ev.key.keysym.mod & KMOD_GUI))
-#else
-			if ((ev.key.keysym.sym == SDLK_q) && (ev.key.keysym.mod & KMOD_META))
+		if ((ev.key.keysym.sym == SDLK_q) && (ev.key.keysym.mod & KMOD_GUI))
+			onQuit();
 #endif
-#else
-			if ((ev.key.keysym.sym == SDLK_F4) && (ev.key.keysym.mod & KMOD_ALT))
-#endif
-			{
-				onQuit()
-			}
-		}
 		break;
-#endif
 
 		case SDL_WINDOWEVENT:
 		{