diff --git a/src/libui_sdl/DlgInputConfig.cpp b/src/libui_sdl/DlgInputConfig.cpp
index 513bd901..4c464f14 100644
--- a/src/libui_sdl/DlgInputConfig.cpp
+++ b/src/libui_sdl/DlgInputConfig.cpp
@@ -432,7 +432,7 @@ void Open(int type)
         uiLabel* dummy = uiNewLabel("");
         uiBoxAppend(in_ctrl, uiControl(dummy), 1);
 
-        dlg->keypresscatcher = uiNewArea(&dlg->areahandler);
+        dlg->keypresscatcher = uiNewArea(&dlg->areahandler, 0);
         uiControl(dlg->keypresscatcher)->UserData = dlg;
         uiBoxAppend(in_ctrl, uiControl(dlg->keypresscatcher), 0);
 
diff --git a/src/libui_sdl/libui/ui.h b/src/libui_sdl/libui/ui.h
index dd1c7863..2641f30e 100644
--- a/src/libui_sdl/libui/ui.h
+++ b/src/libui_sdl/libui/ui.h
@@ -341,7 +341,7 @@ _UI_EXTERN void uiAreaScrollTo(uiArea *a, double x, double y, double width, doub
 _UI_EXTERN void uiAreaBeginUserWindowMove(uiArea *a);
 _UI_EXTERN void uiAreaBeginUserWindowResize(uiArea *a, uiWindowResizeEdge edge);
 _UI_EXTERN void uiAreaSetBackgroundColor(uiArea *a, int r, int g, int b);
-_UI_EXTERN uiArea *uiNewArea(uiAreaHandler *ah);
+_UI_EXTERN uiArea *uiNewArea(uiAreaHandler *ah, int opengl);
 _UI_EXTERN uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height);
 
 struct uiAreaDrawParams {
@@ -608,6 +608,7 @@ _UI_EXTERN uiGLContext *uiGLNewContext(uiControl* c, int vermajor, int verminor)
 _UI_EXTERN void uiGLFreeContext(uiGLContext* ctx);
 _UI_EXTERN void uiGLMakeContextCurrent(uiGLContext* ctx);
 _UI_EXTERN void *uiGLGetProcAddress(const char* proc);
+_UI_EXTERN void uiGLSwapBuffers(uiGLContext* ctx);
 
 
 _UI_ENUM(uiModifiers) {
diff --git a/src/libui_sdl/libui/windows/area.cpp b/src/libui_sdl/libui/windows/area.cpp
index 2185f25b..99c843ef 100644
--- a/src/libui_sdl/libui/windows/area.cpp
+++ b/src/libui_sdl/libui/windows/area.cpp
@@ -25,8 +25,11 @@ static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 	}
 
 	// always recreate the render target if necessary
-	if (a->rt == NULL)
-		a->rt = makeHWNDRenderTarget(a->hwnd);
+	if (!a->openGL)
+    {
+        if (a->rt == NULL)
+            a->rt = makeHWNDRenderTarget(a->hwnd);
+    }
 
 	if (areaDoDraw(a, uMsg, wParam, lParam, &lResult) != FALSE)
 		return lResult;
@@ -34,12 +37,14 @@ static LRESULT CALLBACK areaWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM
 	if (uMsg == WM_WINDOWPOSCHANGED) {
 		if ((wp->flags & SWP_NOSIZE) != 0)
 			return DefWindowProcW(hwnd, uMsg, wParam, lParam);
+        a->width = -1;
+        a->height = -1;
 		uiWindowsEnsureGetClientRect(a->hwnd, &client);
 		areaDrawOnResize(a, &client);
 		areaScrollOnResize(a, &client);
 		{
 		    double w, h;
-		    loadAreaSize(a, a->rt, &w, &h);
+		    loadAreaSize(a, &w, &h);
 		    a->ah->Resize(a->ah, a, (int)w, (int)h);
 		}
 		return 0;
@@ -176,12 +181,15 @@ void uiAreaSetBackgroundColor(uiArea *a, int r, int g, int b)
 }
 
 
-uiArea *uiNewArea(uiAreaHandler *ah)
+uiArea *uiNewArea(uiAreaHandler *ah, int opengl)
 {
 	uiArea *a;
 
 	uiWindowsNewControl(uiArea, a);
 
+	a->width = -1;
+	a->height = -1;
+
 	a->ah = ah;
 	a->scrolling = FALSE;
 	clickCounterReset(&(a->cc));
@@ -195,6 +203,8 @@ uiArea *uiNewArea(uiAreaHandler *ah)
 
     uiAreaSetBackgroundColor(a, -1, -1, -1);
 
+    a->openGL = opengl;
+
 	return a;
 }
 
@@ -204,6 +214,9 @@ uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height)
 
 	uiWindowsNewControl(uiArea, a);
 
+	a->width = -1;
+	a->height = -1;
+
 	a->ah = ah;
 	a->scrolling = TRUE;
 	a->scrollWidth = width;
@@ -219,6 +232,8 @@ uiArea *uiNewScrollingArea(uiAreaHandler *ah, int width, int height)
 
     uiAreaSetBackgroundColor(a, -1, -1, -1);
 
+    a->openGL = 0; // TODO, eventually???
+
 	// set initial scrolling parameters
 	areaUpdateScroll(a);
 
diff --git a/src/libui_sdl/libui/windows/area.hpp b/src/libui_sdl/libui/windows/area.hpp
index add62dd9..f8abd4f7 100644
--- a/src/libui_sdl/libui/windows/area.hpp
+++ b/src/libui_sdl/libui/windows/area.hpp
@@ -10,6 +10,8 @@ struct uiArea {
 	HWND hwnd;
 	uiAreaHandler *ah;
 
+	int width, height;
+
 	BOOL scrolling;
 	int scrollWidth;
 	int scrollHeight;
@@ -26,6 +28,8 @@ struct uiArea {
 
 	int bgR, bgG, bgB;
 
+	int openGL;
+
 	ID2D1HwndRenderTarget *rt;
 };
 
@@ -42,6 +46,6 @@ extern void areaUpdateScroll(uiArea *a);
 extern BOOL areaDoEvents(uiArea *a, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lResult);
 
 // areautil.cpp
-extern void loadAreaSize(uiArea *a, ID2D1RenderTarget *rt, double *width, double *height);
+extern void loadAreaSize(uiArea *a, double *width, double *height);
 extern void pixelsToDIP(uiArea *a, double *x, double *y);
 extern void dipToPixels(uiArea *a, double *x, double *y);
diff --git a/src/libui_sdl/libui/windows/areadraw.cpp b/src/libui_sdl/libui/windows/areadraw.cpp
index a9ad4772..6b4845aa 100644
--- a/src/libui_sdl/libui/windows/areadraw.cpp
+++ b/src/libui_sdl/libui/windows/areadraw.cpp
@@ -6,6 +6,13 @@ static HRESULT doPaint(uiArea *a, ID2D1RenderTarget *rt, RECT *clip)
 {
 	uiAreaHandler *ah = a->ah;
 	uiAreaDrawParams dp;
+
+	if (a->openGL)
+    {
+        (*(ah->Draw))(ah, a, &dp);
+        return S_OK;
+    }
+
 	COLORREF bgcolorref;
 	D2D1_COLOR_F bgcolor;
 	D2D1_MATRIX_3X2_F scrollTransform;
@@ -13,7 +20,7 @@ static HRESULT doPaint(uiArea *a, ID2D1RenderTarget *rt, RECT *clip)
 	// no need to save or restore the graphics state to reset transformations;  it's handled by resetTarget() in draw.c, called during the following
 	dp.Context = newContext(rt);
 
-	loadAreaSize(a, rt, &(dp.AreaWidth), &(dp.AreaHeight));
+	loadAreaSize(a, &(dp.AreaWidth), &(dp.AreaHeight));
 
 	dp.ClipX = clip->left;
 	dp.ClipY = clip->top;
@@ -113,6 +120,9 @@ static void onWM_PAINT(uiArea *a)
 
 static void onWM_PRINTCLIENT(uiArea *a, HDC dc)
 {
+    // TODO????
+    if (a->openGL) return;
+
 	ID2D1DCRenderTarget *rt;
 	RECT client;
 	HRESULT hr;
@@ -143,13 +153,16 @@ BOOL areaDoDraw(uiArea *a, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *lRe
 // TODO only if the render target wasn't just created?
 void areaDrawOnResize(uiArea *a, RECT *newClient)
 {
-	D2D1_SIZE_U size;
+    if (!a->openGL)
+    {
+        D2D1_SIZE_U size;
 
-	size.width = newClient->right - newClient->left;
-	size.height = newClient->bottom - newClient->top;
-	// don't track the error; we'll get that in EndDraw()
-	// see https://msdn.microsoft.com/en-us/library/windows/desktop/dd370994%28v=vs.85%29.aspx
-	a->rt->Resize(&size);
+        size.width = newClient->right - newClient->left;
+        size.height = newClient->bottom - newClient->top;
+        // don't track the error; we'll get that in EndDraw()
+        // see https://msdn.microsoft.com/en-us/library/windows/desktop/dd370994%28v=vs.85%29.aspx
+        a->rt->Resize(&size);
+    }
 
 	// according to Rick Brewster, we must always redraw the entire client area after calling ID2D1RenderTarget::Resize() (see http://stackoverflow.com/a/33222983/3408572)
 	// we used to have a uiAreaHandler.RedrawOnResize() method to decide this; now you know why we don't anymore
diff --git a/src/libui_sdl/libui/windows/areaevents.cpp b/src/libui_sdl/libui/windows/areaevents.cpp
index 3ff7a478..46d6ab90 100644
--- a/src/libui_sdl/libui/windows/areaevents.cpp
+++ b/src/libui_sdl/libui/windows/areaevents.cpp
@@ -109,7 +109,7 @@ static void areaMouseEvent(uiArea *a, int down, int  up, WPARAM wParam, LPARAM l
 		me.Y += a->vscrollpos;
 	}
 
-	loadAreaSize(a, NULL, &(me.AreaWidth), &(me.AreaHeight));
+	loadAreaSize(a, &(me.AreaWidth), &(me.AreaHeight));
 
 	me.Down = down;
 	me.Up = up;
diff --git a/src/libui_sdl/libui/windows/areautil.cpp b/src/libui_sdl/libui/windows/areautil.cpp
index 212ea422..ea13221c 100644
--- a/src/libui_sdl/libui/windows/areautil.cpp
+++ b/src/libui_sdl/libui/windows/areautil.cpp
@@ -2,20 +2,35 @@
 #include "uipriv_windows.hpp"
 #include "area.hpp"
 
-void loadAreaSize(uiArea *a, ID2D1RenderTarget *rt, double *width, double *height)
+// TODO: make those int rather than double
+void loadAreaSize(uiArea *a, double *width, double *height)
 {
 	D2D1_SIZE_F size;
 
+	if (a->width != -1)
+    {
+        *width = (double)a->width;
+        *height = (double)a->height;
+        return;
+    }
+
 	*width = 0;
 	*height = 0;
 	if (!a->scrolling) {
-		if (rt == NULL)
+		/*if (rt == NULL)
 			rt = a->rt;
 		size = realGetSize(rt);
 		*width = size.width;
 		*height = size.height;
-		dipToPixels(a, width, height);
+		dipToPixels(a, width, height);*/
+		RECT rect;
+        GetWindowRect(a->hwnd, &rect);
+        *width = (double)(rect.right - rect.left);
+        *height = (double)(rect.bottom - rect.top);
 	}
+
+	a->width = (int)*width;
+	a->height = (int)*height;
 }
 
 void pixelsToDIP(uiArea *a, double *x, double *y)
diff --git a/src/libui_sdl/libui/windows/gl.cpp b/src/libui_sdl/libui/windows/gl.cpp
index beccb79a..67eaedae 100644
--- a/src/libui_sdl/libui/windows/gl.cpp
+++ b/src/libui_sdl/libui/windows/gl.cpp
@@ -134,3 +134,8 @@ void *uiGLGetProcAddress(const char* proc)
 {
     return (void*)wglGetProcAddress(proc);
 }
+
+void uiGLSwapBuffers(uiGLContext* ctx)
+{
+    SwapBuffers(ctx->dc);
+}
diff --git a/src/libui_sdl/main.cpp b/src/libui_sdl/main.cpp
index 6fcb1ae3..b39f493d 100644
--- a/src/libui_sdl/main.cpp
+++ b/src/libui_sdl/main.cpp
@@ -568,6 +568,7 @@ int EmuThreadFunc(void* burp)
             if (EmuRunning == 0) break;
 
             uiAreaQueueRedrawAll(MainDrawArea);
+            //uiGLSwapBuffers(GLContext);
 
             // framerate limiter based off SDL2_gfx
             float framerate;
@@ -619,7 +620,8 @@ int EmuThreadFunc(void* burp)
 
             if (EmuRunning == 2)
             {
-                uiAreaQueueRedrawAll(MainDrawArea);
+                //uiAreaQueueRedrawAll(MainDrawArea);
+                //uiGLSwapBuffers(GLContext);
             }
 
             EmuStatus = EmuRunning;
@@ -2061,7 +2063,7 @@ int main(int argc, char** argv)
     areahandler.Resize = OnAreaResize;
 
     ScreenDrawInited = false;
-    MainDrawArea = uiNewArea(&areahandler);
+    MainDrawArea = uiNewArea(&areahandler, 0);
     uiWindowSetChild(MainWindow, uiControl(MainDrawArea));
     uiControlSetMinSize(uiControl(MainDrawArea), 256, 384);
     uiAreaSetBackgroundColor(MainDrawArea, 0, 0, 0); // TODO: make configurable?