diff --git a/DDrawCompat/D3dDdi/DeviceState.cpp b/DDrawCompat/D3dDdi/DeviceState.cpp
index 912b128..8cc7410 100644
--- a/DDrawCompat/D3dDdi/DeviceState.cpp
+++ b/DDrawCompat/D3dDdi/DeviceState.cpp
@@ -1,3 +1,5 @@
+#include <algorithm>
+
 #include <Config/Config.h>
 #include <Common/Log.h>
 #include <D3dDdi/Device.h>
@@ -5,6 +7,7 @@
 #include <D3dDdi/DrawPrimitive.h>
 #include <D3dDdi/Log/DeviceFuncsLog.h>
 #include <D3dDdi/Resource.h>
+#include <Shaders/VertexFixup.h>
 
 #define LOG_DS LOG_DEBUG << "DeviceState::" << __func__ << ": "
 
@@ -70,6 +73,7 @@ namespace D3dDdi
 		, m_changedStates(0)
 		, m_maxChangedTextureStage(0)
 		, m_changedTextureStageStates{}
+		, m_vsVertexFixup(createVertexShader(g_vsVertexFixup))
 	{
 		const UINT D3DBLENDOP_ADD = 1;
 		const UINT UNINITIALIZED_STATE = 0xBAADBAAD;
@@ -194,6 +198,17 @@ namespace D3dDdi
 		updateConfig();
 	}
 
+	std::unique_ptr<void, ResourceDeleter> DeviceState::createVertexShader(const BYTE* code, UINT size)
+	{
+		D3DDDIARG_CREATEVERTEXSHADERFUNC data = {};
+		data.Size = size;
+		if (FAILED(m_device.getOrigVtable().pfnCreateVertexShaderFunc(m_device, &data, reinterpret_cast<const UINT*>(code))))
+		{
+			return nullptr;
+		}
+		return { data.ShaderHandle, ResourceDeleter(m_device, m_device.getOrigVtable().pfnDeleteVertexShaderFunc) };
+	}
+
 	HRESULT DeviceState::deleteShader(HANDLE shader, HANDLE State::* shaderMember,
 		HRESULT(APIENTRY* origDeleteShaderFunc)(HANDLE, HANDLE))
 	{
@@ -280,12 +295,24 @@ namespace D3dDdi
 		const D3DDDIVERTEXELEMENT* vertexElements)
 	{
 		LOG_DEBUG << Compat::array(vertexElements, data->NumVertexElements);
-		HRESULT result = m_device.getOrigVtable().pfnCreateVertexShaderDecl(m_device, data, vertexElements);
-		if (SUCCEEDED(result))
+
+		const UINT D3DDECLUSAGE_POSITION = 0;
+		const UINT D3DDECLUSAGE_POSITIONT = 9;
+		for (UINT i = 0; i < data->NumVertexElements; ++i)
 		{
-			m_vertexShaderDecls[data->ShaderHandle].assign(vertexElements, vertexElements + data->NumVertexElements);
+			if (D3DDECLUSAGE_POSITIONT == vertexElements[i].Usage)
+			{
+				std::vector<D3DDDIVERTEXELEMENT> ve(vertexElements, vertexElements + data->NumVertexElements);
+				ve[i].Usage = D3DDECLUSAGE_POSITION;
+				HRESULT result = m_device.getOrigVtable().pfnCreateVertexShaderDecl(m_device, data, ve.data());
+				if (SUCCEEDED(result))
+				{
+					m_swVertexShaderDecls.insert(data->ShaderHandle);
+				}
+				return result;
+			}
 		}
-		return result;
+		return m_device.getOrigVtable().pfnCreateVertexShaderDecl(m_device, data, vertexElements);
 	}
 
 	HRESULT DeviceState::pfnDeletePixelShader(HANDLE shader)
@@ -295,15 +322,10 @@ namespace D3dDdi
 
 	HRESULT DeviceState::pfnDeleteVertexShaderDecl(HANDLE shader)
 	{
-		const bool isCurrentShader = shader == m_current.vertexShaderDecl;
 		HRESULT result = deleteShader(shader, &State::vertexShaderDecl, m_device.getOrigVtable().pfnDeleteVertexShaderDecl);
 		if (SUCCEEDED(result))
 		{
-			m_vertexShaderDecls.erase(shader);
-			if (isCurrentShader)
-			{
-				m_device.getDrawPrimitive().setVertexShaderDecl({});
-			}
+			m_swVertexShaderDecls.erase(shader);
 		}
 		return result;
 	}
@@ -675,15 +697,6 @@ namespace D3dDdi
 	{
 		if (setShader(decl, m_current.vertexShaderDecl, m_device.getOrigVtable().pfnSetVertexShaderDecl))
 		{
-			auto it = m_vertexShaderDecls.find(decl);
-			if (it != m_vertexShaderDecls.end())
-			{
-				m_device.getDrawPrimitive().setVertexShaderDecl(it->second);
-			}
-			else
-			{
-				m_device.getDrawPrimitive().setVertexShaderDecl({});
-			}
 			LOG_DS << decl;
 		}
 	}
@@ -696,12 +709,14 @@ namespace D3dDdi
 		}
 	}
 
-	void DeviceState::setViewport(const D3DDDIARG_VIEWPORTINFO& viewport)
+	bool DeviceState::setViewport(const D3DDDIARG_VIEWPORTINFO& viewport)
 	{
 		if (setData(viewport, m_current.viewport, m_device.getOrigVtable().pfnSetViewport))
 		{
 			LOG_DS << viewport;
+			return true;
 		}
+		return false;
 	}
 
 	void DeviceState::setWInfo(const D3DDDIARG_WINFO& wInfo)
@@ -712,12 +727,14 @@ namespace D3dDdi
 		}
 	}
 
-	void DeviceState::setZRange(const D3DDDIARG_ZRANGE& zRange)
+	bool DeviceState::setZRange(const D3DDDIARG_ZRANGE& zRange)
 	{
 		if (setData(zRange, m_current.zRange, m_device.getOrigVtable().pfnSetZRange))
 		{
 			LOG_DS << zRange;
+			return true;
 		}
+		return false;
 	}
 
 	template <typename SetShaderConstData, typename ShaderConstArray, typename Register>
@@ -745,11 +762,12 @@ namespace D3dDdi
 			m_changedTextureStageStates[i].set(D3DDDITSS_MAXANISOTROPY);
 		}
 		m_maxChangedTextureStage = m_changedTextureStageStates.size() - 1;
+		updateVertexFixupConstants();
 	}
 
 	void DeviceState::updateMisc()
 	{
-		setViewport(m_app.viewport);
+		bool updateConstants = setViewport(m_app.viewport);
 
 		auto wInfo = m_app.wInfo;
 		if (1.0f == wInfo.WNear && 1.0f == wInfo.WFar)
@@ -758,7 +776,12 @@ namespace D3dDdi
 		}
 		setWInfo(wInfo);
 
-		setZRange(m_app.zRange);
+		updateConstants |= setZRange(m_app.zRange);
+
+		if (updateConstants)
+		{
+			updateVertexFixupConstants();
+		}
 	}
 
 	void DeviceState::updateRenderStates()
@@ -794,7 +817,14 @@ namespace D3dDdi
 	{
 		setPixelShader(m_app.pixelShader);
 		setVertexShaderDecl(m_app.vertexShaderDecl);
-		setVertexShaderFunc(m_app.vertexShaderFunc);
+		if (m_swVertexShaderDecls.find(m_current.vertexShaderDecl) != m_swVertexShaderDecls.end())
+		{
+			setVertexShaderFunc(m_vsVertexFixup.get());
+		}
+		else
+		{
+			setVertexShaderFunc(m_app.vertexShaderFunc);
+		}
 	}
 
 	void DeviceState::updateStreamSource()
@@ -864,4 +894,22 @@ namespace D3dDdi
 			m_changedTextureStageStates[stage].reset();
 		}
 	}
+
+	void DeviceState::updateVertexFixupConstants()
+	{
+		D3DDDIARG_SETVERTEXSHADERCONST data = {};
+		data.Register = 254;
+		data.Count = 2;
+
+		const float apc = Config::alternatePixelCenter.get();
+		const auto& vp = m_current.viewport;
+		const auto& zr = m_current.zRange;
+
+		ShaderConstF registers[2] = {
+			{ apc - vp.X - vp.Width / 2, apc - vp.Y - vp.Height / 2, -zr.MinZ, 0.0f },
+			{ 2.0f / vp.Width, -2.0f / vp.Height, 1.0f / (zr.MaxZ - zr.MinZ), 1.0f }
+		};
+
+		m_device.getOrigVtable().pfnSetVertexShaderConst(m_device, &data, registers);
+	}
 }
diff --git a/DDrawCompat/D3dDdi/DeviceState.h b/DDrawCompat/D3dDdi/DeviceState.h
index 75dc3f7..aeb1ea8 100644
--- a/DDrawCompat/D3dDdi/DeviceState.h
+++ b/DDrawCompat/D3dDdi/DeviceState.h
@@ -4,10 +4,12 @@
 #include <d3dumddi.h>
 
 #include <array>
-#include <map>
+#include <set>
+#include <memory>
 #include <vector>
 
 #include <Common/BitSet.h>
+#include <D3dDdi/ResourceDeleter.h>
 
 const UINT D3DTEXF_NONE = 0;
 const UINT D3DTEXF_POINT = 1;
@@ -130,6 +132,13 @@ namespace D3dDdi
 			D3DDDIARG_ZRANGE zRange;
 		};
 
+		template <int N>
+		std::unique_ptr<void, ResourceDeleter> createVertexShader(const BYTE(&code)[N])
+		{
+			return createVertexShader(code, N);
+		}
+
+		std::unique_ptr<void, ResourceDeleter> DeviceState::createVertexShader(const BYTE* code, UINT size);
 		HRESULT deleteShader(HANDLE shader, HANDLE State::* shaderMember,
 			HRESULT(APIENTRY* origDeleteShaderFunc)(HANDLE, HANDLE));
 
@@ -157,9 +166,9 @@ namespace D3dDdi
 		void setTextureStageState(const D3DDDIARG_TEXTURESTAGESTATE& tss);
 		void setVertexShaderDecl(HANDLE decl);
 		void setVertexShaderFunc(HANDLE shader);
-		void setViewport(const D3DDDIARG_VIEWPORTINFO& viewport);
+		bool setViewport(const D3DDDIARG_VIEWPORTINFO& viewport);
 		void setWInfo(const D3DDDIARG_WINFO& wInfo);
-		void setZRange(const D3DDDIARG_ZRANGE& zRange);
+		bool setZRange(const D3DDDIARG_ZRANGE& zRange);
 
 		void updateMisc();
 		void updateRenderStates();
@@ -168,6 +177,7 @@ namespace D3dDdi
 		void updateStreamSource();
 		void updateTextureColorKey(UINT stage);
 		void updateTextureStages();
+		void updateVertexFixupConstants();
 
 		Device& m_device;
 		State m_app;
@@ -178,10 +188,11 @@ namespace D3dDdi
 		std::array<ShaderConstF, 256> m_vertexShaderConst;
 		std::array<ShaderConstB, 16> m_vertexShaderConstB;
 		std::array<ShaderConstI, 16> m_vertexShaderConstI;
-		std::map<HANDLE, std::vector<D3DDDIVERTEXELEMENT>> m_vertexShaderDecls;
+		std::set<HANDLE> m_swVertexShaderDecls;
 		UINT m_changedStates;
 		UINT m_maxChangedTextureStage;
 		BitSet<D3DDDIRS_ZENABLE, D3DDDIRS_BLENDOPALPHA> m_changedRenderStates;
 		std::array<BitSet<D3DDDITSS_TEXTUREMAP, D3DDDITSS_TEXTURECOLORKEYVAL>, 8> m_changedTextureStageStates;
+		std::unique_ptr<void, ResourceDeleter> m_vsVertexFixup;
 	};
 }
diff --git a/DDrawCompat/D3dDdi/DrawPrimitive.cpp b/DDrawCompat/D3dDdi/DrawPrimitive.cpp
index 86e735b..2eef343 100644
--- a/DDrawCompat/D3dDdi/DrawPrimitive.cpp
+++ b/DDrawCompat/D3dDdi/DrawPrimitive.cpp
@@ -56,7 +56,6 @@ namespace D3dDdi
 		, m_indexBuffer(device, m_vertexBuffer ? INDEX_BUFFER_SIZE : 0)
 		, m_streamSource{}
 		, m_batched{}
-		, m_isHwVertexProcessingUsed(false)
 	{
 		LOG_ONCE("Dynamic vertex buffers are " << (m_vertexBuffer ? "" : "not ") << "available");
 		LOG_ONCE("Dynamic index buffers are " << (m_indexBuffer ? "" : "not ") << "available");
@@ -622,23 +621,6 @@ namespace D3dDdi
 	INT DrawPrimitive::loadVertices(UINT count)
 	{
 		auto vertices = m_batched.vertices.data();
-		if (!m_isHwVertexProcessingUsed)
-		{
-			const float pixelOffset = Config::alternatePixelCenter.get();
-			UINT offset = 0;
-			for (UINT i = 0; i < count; ++i)
-			{
-				auto v = reinterpret_cast<D3DTLVERTEX*>(vertices + offset);
-				if (0 == v->rhw || INFINITY == v->rhw)
-				{
-					v->rhw = 1;
-				}
-				v->sx += pixelOffset;
-				v->sy += pixelOffset;
-				offset += m_streamSource.stride;
-			}
-		}
-
 		if (m_vertexBuffer)
 		{
 			UINT size = count * m_streamSource.stride;
@@ -766,18 +748,4 @@ namespace D3dDdi
 		}
 		return result;
 	}
-
-	void DrawPrimitive::setVertexShaderDecl(const std::vector<D3DDDIVERTEXELEMENT>& decl)
-	{
-		m_isHwVertexProcessingUsed = true;
-		const UINT D3DDECLUSAGE_POSITIONT = 9;
-		for (auto& vertexElement : decl)
-		{
-			if (D3DDECLUSAGE_POSITIONT == vertexElement.Usage)
-			{
-				m_isHwVertexProcessingUsed = false;
-				return;
-			}
-		}
-	}
 }
diff --git a/DDrawCompat/D3dDdi/DrawPrimitive.h b/DDrawCompat/D3dDdi/DrawPrimitive.h
index d8b6467..29029e6 100644
--- a/DDrawCompat/D3dDdi/DrawPrimitive.h
+++ b/DDrawCompat/D3dDdi/DrawPrimitive.h
@@ -26,7 +26,6 @@ namespace D3dDdi
 		HRESULT drawIndexed(D3DDDIARG_DRAWINDEXEDPRIMITIVE2 data, const UINT16* indices, const UINT* flagBuffer);
 		HRESULT setStreamSource(const D3DDDIARG_SETSTREAMSOURCE& data);
 		HRESULT setStreamSourceUm(const D3DDDIARG_SETSTREAMSOURCEUM& data, const void* umBuffer);
-		void setVertexShaderDecl(const std::vector<D3DDDIVERTEXELEMENT>& decl);
 
 	private:
 		struct BatchedPrimitives
@@ -86,6 +85,5 @@ namespace D3dDdi
 		StreamSource m_streamSource;
 		std::map<HANDLE, BYTE*> m_sysMemVertexBuffers;
 		BatchedPrimitives m_batched;
-		bool m_isHwVertexProcessingUsed;
 	};
 }
diff --git a/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.cpp b/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.cpp
index 792eba0..38a88f3 100644
--- a/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.cpp
+++ b/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.cpp
@@ -272,6 +272,15 @@ std::ostream& operator<<(std::ostream& os, const D3DDDIARG_UNLOCK& val)
 		<< Compat::hex(val.Flags.Value);
 }
 
+std::ostream& operator<<(std::ostream& os, const D3DDDIARG_VIEWPORTINFO& val)
+{
+	return Compat::LogStruct(os)
+		<< val.X
+		<< val.Y
+		<< val.Width
+		<< val.Height;
+}
+
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_WINFO& val)
 {
 	return Compat::LogStruct(os)
diff --git a/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.h b/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.h
index 3ff698c..17e1043 100644
--- a/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.h
+++ b/DDrawCompat/D3dDdi/Log/DeviceFuncsLog.h
@@ -34,6 +34,7 @@ std::ostream& operator<<(std::ostream& os, const D3DDDIARG_SETSTREAMSOURCEUM& va
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_SETVERTEXSHADERCONST& val);
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_TEXTURESTAGESTATE& val);
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_UNLOCK& val);
+std::ostream& operator<<(std::ostream& os, const D3DDDIARG_VIEWPORTINFO& val);
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_WINFO& val);
 std::ostream& operator<<(std::ostream& os, const D3DDDIARG_ZRANGE& val);
 std::ostream& operator<<(std::ostream& os, const D3DDDIBOX& val);
diff --git a/DDrawCompat/DDrawCompat.vcxproj b/DDrawCompat/DDrawCompat.vcxproj
index 6361d2e..b0ebd19 100644
--- a/DDrawCompat/DDrawCompat.vcxproj
+++ b/DDrawCompat/DDrawCompat.vcxproj
@@ -435,6 +435,14 @@
     <FxCompile Include="Shaders\GenBilinear.hlsl" />
     <FxCompile Include="Shaders\PaletteLookup.hlsl" />
     <FxCompile Include="Shaders\TextureSampler.hlsl" />
+    <FxCompile Include="Shaders\VertexFixup.hlsl">
+      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Vertex</ShaderType>
+      <ShaderType Condition="'$(Configuration)|$(Platform)'=='ReleaseWithDebugLogs|Win32'">Vertex</ShaderType>
+      <ShaderType Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Vertex</ShaderType>
+      <VariableName Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">g_vs%(Filename)</VariableName>
+      <VariableName Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">g_vs%(Filename)</VariableName>
+      <VariableName Condition="'$(Configuration)|$(Platform)'=='ReleaseWithDebugLogs|Win32'">g_vs%(Filename)</VariableName>
+    </FxCompile>
   </ItemGroup>
   <ItemGroup>
     <Image Include="arrow.bmp" />
diff --git a/DDrawCompat/DDrawCompat.vcxproj.filters b/DDrawCompat/DDrawCompat.vcxproj.filters
index 385c937..6f5a6b4 100644
--- a/DDrawCompat/DDrawCompat.vcxproj.filters
+++ b/DDrawCompat/DDrawCompat.vcxproj.filters
@@ -821,6 +821,9 @@
     <FxCompile Include="Shaders\TextureSampler.hlsl">
       <Filter>Shaders</Filter>
     </FxCompile>
+    <FxCompile Include="Shaders\VertexFixup.hlsl">
+      <Filter>Shaders</Filter>
+    </FxCompile>
   </ItemGroup>
   <ItemGroup>
     <Image Include="arrow.bmp">
diff --git a/DDrawCompat/Direct3d/Log.cpp b/DDrawCompat/Direct3d/Log.cpp
index 163eb71..0a806e4 100644
--- a/DDrawCompat/Direct3d/Log.cpp
+++ b/DDrawCompat/Direct3d/Log.cpp
@@ -131,3 +131,44 @@ std::ostream& operator<<(std::ostream& os, const D3DVERTEXBUFFERDESC& data)
 		<< Compat::hex(data.dwFVF)
 		<< data.dwNumVertices;
 }
+
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT& data)
+{
+	return Compat::LogStruct(os)
+		<< data.dwX
+		<< data.dwY
+		<< data.dwWidth
+		<< data.dwHeight
+		<< data.dvScaleX
+		<< data.dvScaleY
+		<< data.dvMaxX
+		<< data.dvMaxY
+		<< data.dvMinZ
+		<< data.dvMaxZ;
+}
+
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT2& data)
+{
+	return Compat::LogStruct(os)
+		<< data.dwX
+		<< data.dwY
+		<< data.dwWidth
+		<< data.dwHeight
+		<< data.dvClipX
+		<< data.dvClipY
+		<< data.dvClipWidth
+		<< data.dvClipHeight
+		<< data.dvMinZ
+		<< data.dvMaxZ;
+}
+
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT7& data)
+{
+	return Compat::LogStruct(os)
+		<< data.dwX
+		<< data.dwY
+		<< data.dwWidth
+		<< data.dwHeight
+		<< data.dvMinZ
+		<< data.dvMaxZ;
+}
diff --git a/DDrawCompat/Direct3d/Log.h b/DDrawCompat/Direct3d/Log.h
index 6607755..0d2c443 100644
--- a/DDrawCompat/Direct3d/Log.h
+++ b/DDrawCompat/Direct3d/Log.h
@@ -17,3 +17,6 @@ std::ostream& operator<<(std::ostream& os, const D3DMATERIAL7& data);
 std::ostream& operator<<(std::ostream& os, const D3DRECT& data);
 std::ostream& operator<<(std::ostream& os, const D3DSTATUS& data);
 std::ostream& operator<<(std::ostream& os, const D3DVERTEXBUFFERDESC& data);
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT& data);
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT2& data);
+std::ostream& operator<<(std::ostream& os, const D3DVIEWPORT7& data);
diff --git a/DDrawCompat/Shaders/VertexFixup.hlsl b/DDrawCompat/Shaders/VertexFixup.hlsl
new file mode 100644
index 0000000..af1c6ce
--- /dev/null
+++ b/DDrawCompat/Shaders/VertexFixup.hlsl
@@ -0,0 +1,23 @@
+float4 g_offset : register(c254);
+float4 g_multiplier : register(c255);
+
+struct VS
+{
+    float4 pos : POSITION;
+    float fog : FOG;
+    float4 color[2] : COLOR;
+    float4 tex[8] : TEXCOORD;
+};
+
+VS main(const VS i)
+{
+    const float w = (i.pos.w > 0 && 1 / i.pos.w > 0) ? 1 / i.pos.w : 1;
+
+    VS o = i;
+    o.pos = (i.pos + g_offset) * g_multiplier;
+    o.pos.z = saturate(o.pos.z);
+    o.pos.xyz *= w;
+    o.pos.w = w;
+    o.fog = i.color[1].a;
+    return o;
+}