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diff --git a/materialsystem/shaderapidx9/shaderdevicebase.h b/materialsystem/shaderapidx9/shaderdevicebase.h
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+++ b/materialsystem/shaderapidx9/shaderdevicebase.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//===========================================================================//
+
+#ifndef SHADERDEVICEBASE_H
+#define SHADERDEVICEBASE_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "togl/rendermechanism.h"
+#include "shaderapi/IShaderDevice.h"
+#include "IHardwareConfigInternal.h"
+#include "bitmap/imageformat.h"
+#include "materialsystem/imaterialsystem.h"
+#include "hardwareconfig.h"
+
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+//-----------------------------------------------------------------------------
+class KeyValues;
+
+
+//-----------------------------------------------------------------------------
+// define this if you want to run with NVPERFHUD
+//-----------------------------------------------------------------------------
+//#define NVPERFHUD 1
+
+
+//-----------------------------------------------------------------------------
+// Uncomment this to activate the reference rasterizer
+//-----------------------------------------------------------------------------
+//#define USE_REFERENCE_RASTERIZER 1
+
+//-----------------------------------------------------------------------------
+// Uncomment to check for -nulldevice on command line and use D3DDEVTYPE_NULLREF.
+//-----------------------------------------------------------------------------
+#define ENABLE_NULLREF_DEVICE_SUPPORT
+
+//-----------------------------------------------------------------------------
+// The Base implementation of the shader device
+//-----------------------------------------------------------------------------
+class CShaderDeviceMgrBase : public IShaderDeviceMgr
+{
+public:
+	// constructor, destructor
+	CShaderDeviceMgrBase();
+	virtual ~CShaderDeviceMgrBase();
+
+	// Methods of IAppSystem
+	virtual bool Connect( CreateInterfaceFn factory );
+	virtual void Disconnect();
+	virtual void *QueryInterface( const char *pInterfaceName );
+
+	// Methods of IShaderDeviceMgr
+	virtual bool GetRecommendedConfigurationInfo( int nAdapter, int nDXLevel, KeyValues *pCongifuration );
+	virtual void AddModeChangeCallback( ShaderModeChangeCallbackFunc_t func );
+	virtual void RemoveModeChangeCallback( ShaderModeChangeCallbackFunc_t func );
+
+	// Reads in the hardware caps from the dxsupport.cfg file
+	void ReadHardwareCaps( HardwareCaps_t &caps, int nDxLevel );
+
+	// Reads in the max + preferred DX support level
+	void ReadDXSupportLevels( HardwareCaps_t &caps );
+
+	// Returns the hardware caps for a particular adapter
+	const HardwareCaps_t& GetHardwareCaps( int nAdapter ) const;
+
+	// Invokes mode change callbacks
+	void InvokeModeChangeCallbacks();
+
+	// Factory to return from SetMode
+	static void* ShaderInterfaceFactory( const char *pInterfaceName, int *pReturnCode );
+
+	// Returns only valid dx levels
+	int GetClosestActualDXLevel( int nDxLevel ) const;
+
+protected:
+	struct AdapterInfo_t
+	{
+		HardwareCaps_t m_ActualCaps;
+	};
+
+private:
+	// Reads in the dxsupport.cfg keyvalues
+	KeyValues *ReadDXSupportKeyValues();
+
+	// Reads in ConVars + config variables
+	void LoadConfig( KeyValues *pKeyValues, KeyValues *pConfiguration );
+
+	// Loads the hardware caps, for cases in which the D3D caps lie or where we need to augment the caps
+	void LoadHardwareCaps( KeyValues *pGroup, HardwareCaps_t &caps );
+
+	// Gets the recommended configuration associated with a particular dx level
+	bool GetRecommendedConfigurationInfo( int nAdapter, int nDXLevel, int nVendorID, int nDeviceID, KeyValues *pConfiguration );
+
+	// Returns the amount of video memory in bytes for a particular adapter
+	virtual int GetVidMemBytes( int nAdapter ) const = 0;
+
+	// Looks for override keyvalues in the dxsupport cfg keyvalues
+	KeyValues *FindDXLevelSpecificConfig( KeyValues *pKeyValues, int nDxLevel );
+	KeyValues *FindDXLevelAndVendorSpecificConfig( KeyValues *pKeyValues, int nDxLevel, int nVendorID );
+	KeyValues *FindCPUSpecificConfig( KeyValues *pKeyValues, int nCPUMhz, bool bAMD );
+	KeyValues *FindMemorySpecificConfig( KeyValues *pKeyValues, int nSystemRamMB );
+	KeyValues *FindVidMemSpecificConfig( KeyValues *pKeyValues, int nVideoRamMB );
+	KeyValues *FindCardSpecificConfig( KeyValues *pKeyValues, int nVendorID, int nDeviceID );
+
+protected:
+	// Stores adapter info for all adapters
+	CUtlVector<AdapterInfo_t> m_Adapters;
+
+	// Installed mode change callbacks
+	CUtlVector< ShaderModeChangeCallbackFunc_t > m_ModeChangeCallbacks;
+
+	KeyValues *m_pDXSupport;
+};
+
+
+//-----------------------------------------------------------------------------
+// The Base implementation of the shader device
+//-----------------------------------------------------------------------------
+class CShaderDeviceBase : public IShaderDevice
+{
+public:
+	enum IPCMessage_t
+	{
+		RELEASE_MESSAGE		= 0x5E740DE0,
+		REACQUIRE_MESSAGE	= 0x5E740DE1,
+		EVICT_MESSAGE		= 0x5E740DE2,
+	};
+
+	// Methods of IShaderDevice
+public:
+	virtual ImageFormat GetBackBufferFormat() const;
+	virtual int StencilBufferBits() const;
+	virtual bool IsAAEnabled() const;
+	virtual bool AddView( void* hWnd );
+	virtual void RemoveView( void* hWnd );
+	virtual void SetView( void* hWnd );
+	virtual void GetWindowSize( int& nWidth, int& nHeight ) const;
+
+	// Methods exposed to the rest of shader api
+	virtual bool InitDevice( void *hWnd, int nAdapter, const ShaderDeviceInfo_t& mode ) = 0;
+	virtual void ShutdownDevice() = 0;
+	virtual bool IsDeactivated() const = 0;
+
+public:
+	// constructor, destructor
+	CShaderDeviceBase();
+	virtual ~CShaderDeviceBase();
+
+	virtual void OtherAppInitializing( bool initializing ) {}
+	virtual void EvictManagedResourcesInternal() {}
+
+	void* GetIPCHWnd();
+	void SendIPCMessage( IPCMessage_t message );
+
+protected:
+	// IPC communication for multiple shaderapi apps
+	void InstallWindowHook( void *hWnd );
+	void RemoveWindowHook( void *hWnd );
+	void SetCurrentThreadAsOwner();
+	void RemoveThreadOwner();
+	bool ThreadOwnsDevice();
+
+	// Finds a child window
+	int  FindView( void* hWnd ) const;
+
+	int m_nAdapter;
+	void *m_hWnd;
+	void* m_hWndCookie;
+	bool m_bInitialized : 1;
+	bool m_bIsMinimized : 1;
+
+	// The current view hwnd
+	void* m_ViewHWnd;
+
+	int	m_nWindowWidth;
+	int m_nWindowHeight;
+	uint32 m_dwThreadId;
+};
+
+
+//-----------------------------------------------------------------------------
+// Inline methods
+//-----------------------------------------------------------------------------
+inline void* CShaderDeviceBase::GetIPCHWnd()
+{
+	return m_hWndCookie;
+}
+
+
+//-----------------------------------------------------------------------------
+// Helper class to reduce code related to shader buffers
+//-----------------------------------------------------------------------------
+template< class T >
+class CShaderBuffer : public IShaderBuffer
+{
+public:
+	CShaderBuffer( T *pBlob ) : m_pBlob( pBlob ) {}
+
+	virtual size_t GetSize() const
+	{
+		return m_pBlob ? m_pBlob->GetBufferSize() : 0;
+	}
+
+	virtual const void* GetBits() const
+	{
+		return m_pBlob ? m_pBlob->GetBufferPointer() : NULL;
+	}
+
+	virtual void Release()
+	{
+		if ( m_pBlob )
+		{
+			m_pBlob->Release();
+		}
+		delete this;
+	}
+
+private:
+	T *m_pBlob;
+};
+
+
+
+#endif // SHADERDEVICEBASE_H
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