diff --git a/CMakeLists.txt b/CMakeLists.txt
index 80eac0c54..e54dd8a33 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,6 +14,11 @@ list( APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR} )
 include( CreateLaunchers )
 include( FindPackageHandleStandardArgs )
 
+# Produce a warning if XP support will be missing.
+if( MSVC14 AND NOT CMAKE_GENERATOR_TOOLSET STREQUAL "v140_xp" )
+	message( WARNING "This project supports Windows XP (including XP x64), but you must set the optional toolset to v140_xp manually to have it in your build! Use -T \"v140_xp\" from the command prompt." )
+endif()
+
 # Support cross compiling
 option( FORCE_CROSSCOMPILE "Turn on cross compiling." NO )
 if( FORCE_CROSSCOMPILE )
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1d0db5221..6edd616ae 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -115,59 +115,49 @@ if( WIN32 )
 	set( FMOD_LIB_PATH_SUFFIXES PATH_SUFFIXES lib )
 	set( NASM_NAMES nasmw nasm )
 	
-	if( NOT MSVC )
-		find_path( D3D_INCLUDE_DIR d3d9.h
-			PATHS ENV DXSDK_DIR
-			PATH_SUFFIXES Include )
-		if( NOT D3D_INCLUDE_DIR )
-			message( SEND_ERROR "Could not find DirectX 9 header files" )
-		else()
-			include_directories( ${D3D_INCLUDE_DIR} )
-		endif()
-	
-		find_path( XINPUT_INCLUDE_DIR xinput.h
-			PATHS ENV DXSDK_DIR
-			PATH_SUFFIXES Include )
-		if( NOT XINPUT_INCLUDE_DIR )
-			message( WARNING "Could not find xinput.h. XInput will be disabled." )
-			add_definitions( -DNO_XINPUT )
-		else()
-			include_directories( ${XINPUT_INCLUDE_DIR} )
-		endif()
-
-		find_library( DX_dxguid_LIBRARY dxguid
-			PATHS ENV DXSDK_DIR
-			PATH_SUFFIXES Lib Lib/${XBITS} )
-		find_library( DX_dinput8_LIBRARY dinput8
-			PATHS ENV DXSDK_DIR
-			PATH_SUFFIXES Lib Lib/${XBITS} )
-
-		set( DX_LIBS_FOUND YES )
-		if( NOT DX_dxguid_LIBRARY )
-			set( DX_LIBS_FOUND NO )
-		endif()
-		if( NOT DX_dinput8_LIBRARY )
-			set( DX_LIBS_FOUND NO )
-		endif()
-
-		if( NOT DX_LIBS_FOUND )
-			message( FATAL_ERROR "Could not find DirectX 9 libraries" )
-		endif()
-		
-		set( DX_LIBS
-			"${DX_dxguid_LIBRARY}"
-			"${DX_dinput8_LIBRARY}"
-		)
+	find_path( D3D_INCLUDE_DIR d3d9.h
+		PATHS ENV DXSDK_DIR
+		PATH_SUFFIXES Include )
+	if( NOT D3D_INCLUDE_DIR )
+		message( SEND_ERROR "Could not find DirectX 9 header files" )
 	else()
-		set( DX_LIBS
-			dxguid
-			dinput8
-		)
+		include_directories( ${D3D_INCLUDE_DIR} )
+	endif()
+	
+	find_path( XINPUT_INCLUDE_DIR xinput.h
+		PATHS ENV DXSDK_DIR
+		PATH_SUFFIXES Include )
+	if( NOT XINPUT_INCLUDE_DIR )
+		message( WARNING "Could not find xinput.h. XInput will be disabled." )
+		add_definitions( -DNO_XINPUT )
+	else()
+		include_directories( ${XINPUT_INCLUDE_DIR} )
 	endif()
 
-	set( ZDOOM_LIBS ${DX_LIBS}
+	find_library( DX_dxguid_LIBRARY dxguid
+		PATHS ENV DXSDK_DIR
+		PATH_SUFFIXES Lib Lib/${XBITS} )
+	find_library( DX_dinput8_LIBRARY dinput8
+		PATHS ENV DXSDK_DIR
+		PATH_SUFFIXES Lib Lib/${XBITS} )
+
+	set( DX_LIBS_FOUND YES )
+	if( NOT DX_dxguid_LIBRARY )
+		set( DX_LIBS_FOUND NO )
+	endif()
+	if( NOT DX_dinput8_LIBRARY )
+		set( DX_LIBS_FOUND NO )
+	endif()
+
+	if( NOT DX_LIBS_FOUND )
+		message( FATAL_ERROR "Could not find DirectX 9 libraries" )
+	endif()
+
+	set( ZDOOM_LIBS
 		wsock32
 		winmm
+		"${DX_dxguid_LIBRARY}"
+		"${DX_dinput8_LIBRARY}"
 		ole32
 		user32
 		gdi32
diff --git a/src/g_shared/a_quake.cpp b/src/g_shared/a_quake.cpp
index aae006ca7..63394e02a 100644
--- a/src/g_shared/a_quake.cpp
+++ b/src/g_shared/a_quake.cpp
@@ -291,10 +291,9 @@ int DEarthquake::StaticGetQuakeIntensities(AActor *victim, FQuakeJiggers &jigger
 
 				if (!(quake->m_Flags & QF_WAVE))
 				{
-					jiggers.Falloff = MAX(falloff, jiggers.Falloff);
-					jiggers.RollIntensity = MAX(r, jiggers.RollIntensity) * jiggers.Falloff;
+					jiggers.RollIntensity = MAX(r, jiggers.RollIntensity) * falloff;
 
-					intensity *= jiggers.Falloff;
+					intensity *= falloff;
 					if (quake->m_Flags & QF_RELATIVE)
 					{
 						jiggers.RelIntensity.X = MAX(intensity.X, jiggers.RelIntensity.X);
@@ -310,14 +309,13 @@ int DEarthquake::StaticGetQuakeIntensities(AActor *victim, FQuakeJiggers &jigger
 				}
 				else
 				{
-					jiggers.Falloff = MAX(falloff, jiggers.Falloff);
-					jiggers.RollWave = r * quake->GetModWave(quake->m_RollWave) * jiggers.Falloff * strength;
+					jiggers.RollWave = r * quake->GetModWave(quake->m_RollWave) * falloff * strength;
 
 					
 					intensity.X *= quake->GetModWave(quake->m_WaveSpeed.X);
 					intensity.Y *= quake->GetModWave(quake->m_WaveSpeed.Y);
 					intensity.Z *= quake->GetModWave(quake->m_WaveSpeed.Z);
-					intensity *= strength * jiggers.Falloff;
+					intensity *= strength * falloff;
 
 					// [RH] This only gives effect to the last sine quake. I would
 					// prefer if some way was found to make multiples coexist
diff --git a/src/g_shared/a_sharedglobal.h b/src/g_shared/a_sharedglobal.h
index 314061f04..029653bb1 100644
--- a/src/g_shared/a_sharedglobal.h
+++ b/src/g_shared/a_sharedglobal.h
@@ -153,7 +153,6 @@ struct FQuakeJiggers
 	DVector3 RelIntensity;
 	DVector3 Offset;
 	DVector3 RelOffset;
-	double Falloff;
 	double RollIntensity, RollWave;
 };
 
diff --git a/src/g_shared/shared_sbar.cpp b/src/g_shared/shared_sbar.cpp
index 3c41d18ca..f66ec187d 100644
--- a/src/g_shared/shared_sbar.cpp
+++ b/src/g_shared/shared_sbar.cpp
@@ -300,7 +300,7 @@ void DBaseStatusBar::SetScaled (bool scale, bool force)
 		ST_X = 0;
 		ST_Y = VirticalResolution - RelTop;
 		float aspect = ActiveRatio(SCREENWIDTH, SCREENHEIGHT);
-		if (aspect >= 1.3f)
+		if (!AspectTallerThanWide(aspect))
 		{ // Normal resolution
 			::ST_Y = Scale (ST_Y, SCREENHEIGHT, VirticalResolution);
 		}
diff --git a/src/r_main.cpp b/src/r_main.cpp
index d84698b7c..040b57b71 100644
--- a/src/r_main.cpp
+++ b/src/r_main.cpp
@@ -318,7 +318,7 @@ void R_SWRSetWindow(int windowSize, int fullWidth, int fullHeight, int stHeight,
 	virtwidth = virtwidth2 = fullWidth;
 	virtheight = virtheight2 = fullHeight;
 
-	if (trueratio < 1.3f)
+	if (AspectTallerThanWide(trueratio))
 	{
 		virtheight2 = virtheight2 * AspectMultiplier(trueratio) / 48;
 	}
@@ -327,7 +327,7 @@ void R_SWRSetWindow(int windowSize, int fullWidth, int fullHeight, int stHeight,
 		virtwidth2 = virtwidth2 * AspectMultiplier(trueratio) / 48;
 	}
 
-	if (WidescreenRatio < 1.3f)
+	if (AspectTallerThanWide(WidescreenRatio))
 	{
 		virtheight = virtheight * AspectMultiplier(WidescreenRatio) / 48;
 	}
@@ -948,7 +948,7 @@ void R_RenderViewToCanvas (AActor *actor, DCanvas *canvas,
 	RenderTarget = canvas;
 	bRenderingToCanvas = true;
 
-	R_SetWindow (12, width, height, height);
+	R_SetWindow (12, width, height, height, true);
 	viewwindowx = x;
 	viewwindowy = y;
 	viewactive = true;
diff --git a/src/r_utility.cpp b/src/r_utility.cpp
index 8e4284b7e..ebe36dc9d 100644
--- a/src/r_utility.cpp
+++ b/src/r_utility.cpp
@@ -198,7 +198,7 @@ void R_SetViewSize (int blocks)
 //
 //==========================================================================
 
-void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight)
+void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight, bool renderingToCanvas)
 {
 	float trueratio;
 
@@ -220,7 +220,15 @@ void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight)
 		freelookviewheight = ((setblocks*fullHeight)/10)&~7;
 	}
 
-	WidescreenRatio = ActiveRatio (fullWidth, fullHeight, &trueratio);
+	if (renderingToCanvas)
+	{
+		WidescreenRatio = fullWidth / (float)fullHeight;
+		trueratio = WidescreenRatio;
+	}
+	else
+	{
+		WidescreenRatio = ActiveRatio(fullWidth, fullHeight, &trueratio);
+	}
 
 	DrawFSHUD = (windowSize == 11);
 	
@@ -229,7 +237,7 @@ void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight)
 
 	centery = viewheight/2;
 	centerx = viewwidth/2;
-	if (WidescreenRatio < 1.3f)
+	if (AspectTallerThanWide(WidescreenRatio))
 	{
 		centerxwide = centerx;
 	}
diff --git a/src/r_utility.h b/src/r_utility.h
index e9fd436e5..09a8b5667 100644
--- a/src/r_utility.h
+++ b/src/r_utility.h
@@ -95,7 +95,7 @@ void R_ExecuteSetViewSize (void);
 
 // Called by M_Responder.
 void R_SetViewSize (int blocks);
-void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight);
+void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight, bool renderingToCanvas = false);
 
 
 extern void R_FreePastViewers ();
diff --git a/src/v_draw.cpp b/src/v_draw.cpp
index a33fd618b..4677c4b08 100644
--- a/src/v_draw.cpp
+++ b/src/v_draw.cpp
@@ -874,7 +874,7 @@ void DCanvas::VirtualToRealCoords(double &x, double &y, double &w, double &h,
 	double right = x + w;
 	double bottom = y + h;
 
-	if (myratio > 1.4f)
+	if (myratio > 1.334f)
 	{ // The target surface is either 16:9 or 16:10, so expand the
 	  // specified virtual size to avoid undesired stretching of the
 	  // image. Does not handle non-4:3 virtual sizes. I'll worry about
@@ -887,7 +887,7 @@ void DCanvas::VirtualToRealCoords(double &x, double &y, double &w, double &h,
 		x = x * Width / vwidth;
 		w = right * Width / vwidth - x;
 	}
-	if (myratio < 1.3f)
+	if (AspectTallerThanWide(myratio))
 	{ // The target surface is 5:4
 		y = (y - vheight * 0.5) * Height * 600 / (vheight * AspectBaseHeight(myratio)) + Height * 0.5;
 		h = (bottom - vheight * 0.5) * Height * 600 / (vheight * AspectBaseHeight(myratio)) + Height * 0.5 - y;
@@ -950,7 +950,7 @@ void DCanvas::FillBorder (FTexture *img)
 		return;
 	}
 	int bordtop, bordbottom, bordleft, bordright, bord;
-	if (myratio < 1.3f)
+	if (AspectTallerThanWide(myratio))
 	{ // Screen is taller than it is wide
 		bordleft = bordright = 0;
 		bord = Height - Height * AspectMultiplier(myratio) / 48;
diff --git a/src/v_video.cpp b/src/v_video.cpp
index 20e1f526c..af190d372 100644
--- a/src/v_video.cpp
+++ b/src/v_video.cpp
@@ -1362,7 +1362,7 @@ void V_CalcCleanFacs (int designwidth, int designheight, int realwidth, int real
 	int cx1, cy1, cx2, cy2;
 
 	ratio = ActiveRatio(realwidth, realheight);
-	if (ratio < 1.3f)
+	if (AspectTallerThanWide(ratio))
 	{
 		cwidth = realwidth;
 		cheight = realheight * AspectMultiplier(ratio) / 48;
@@ -1708,17 +1708,31 @@ int AspectBaseWidth(float aspect)
 
 int AspectBaseHeight(float aspect)
 {
-	return (int)round(200.0f * (320.0f / (240.0f * aspect)) * 3.0f);
+	if (!AspectTallerThanWide(aspect))
+		return (int)round(200.0f * (320.0f / (AspectBaseWidth(aspect) / 3.0f)) * 3.0f);
+	else
+		return (int)round((200.0f * (4.0f / 3.0f)) / aspect * 3.0f);
 }
 
-int AspectPspriteOffset(float aspect)
+double AspectPspriteOffset(float aspect)
 {
-	return aspect < 1.3f ? (int)(6.5*FRACUNIT) : 0;
+	if (!AspectTallerThanWide(aspect))
+		return 0.0;
+	else
+		return ((4.0 / 3.0) / aspect - 1.0) * 97.5;
 }
 
 int AspectMultiplier(float aspect)
 {
-	return (int)round(320.0f / (240.0f * aspect) * 48.0f);
+	if (!AspectTallerThanWide(aspect))
+		return (int)round(320.0f / (AspectBaseWidth(aspect) / 3.0f) * 48.0f);
+	else
+		return (int)round(200.0f / (AspectBaseHeight(aspect) / 3.0f) * 48.0f);
+}
+
+bool AspectTallerThanWide(float aspect)
+{
+	return aspect < 1.333f;
 }
 
 void IVideo::DumpAdapters ()
diff --git a/src/v_video.h b/src/v_video.h
index 8d785e43f..7317c9d1a 100644
--- a/src/v_video.h
+++ b/src/v_video.h
@@ -523,8 +523,9 @@ static inline double ActiveRatio (double width, double height) { return ActiveRa
 
 int AspectBaseWidth(float aspect);
 int AspectBaseHeight(float aspect);
-int AspectPspriteOffset(float aspect);
+double AspectPspriteOffset(float aspect);
 int AspectMultiplier(float aspect);
+bool AspectTallerThanWide(float aspect);
 
 EXTERN_CVAR(Int, uiscale);