169 lines
4.3 KiB
C++
169 lines
4.3 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Make dynamic loading of dx_proxy.dll and methods acquisition easier.
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#ifndef DX_PROXY_H
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#define DX_PROXY_H
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#ifdef _WIN32
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#pragma once
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#endif
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/*
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class DxProxyModule
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Uses a lazy-load technique to load the dx_proxy.dll module and acquire the
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function pointers.
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The dx_proxy.dll module is automatically unloaded during desctruction.
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*/
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class DxProxyModule
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{
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public:
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/// Construction
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DxProxyModule( void );
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/// Destruction
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~DxProxyModule( void );
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private: // Prevent copying via copy constructor or assignment
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DxProxyModule( const DxProxyModule & );
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DxProxyModule & operator = ( const DxProxyModule & );
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public:
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/// Loads the module and acquires function pointers, returns if the module was
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/// loaded successfully.
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/// If the module was already loaded the call has no effect and returns TRUE.
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BOOL Load( void );
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/// Frees the loaded module.
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void Free( void );
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private:
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enum Func {
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fnD3DXCompileShaderFromFile = 0,
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fnTotal
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};
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HMODULE m_hModule; //!< The handle of the loaded dx_proxy.dll
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FARPROC m_arrFuncs[fnTotal]; //!< The array of loaded function pointers
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///
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/// Interface functions calling into DirectX proxy
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///
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public:
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HRESULT D3DXCompileShaderFromFile(
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LPCSTR pSrcFile,
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CONST D3DXMACRO* pDefines,
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LPD3DXINCLUDE pInclude,
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LPCSTR pFunctionName,
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LPCSTR pProfile,
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DWORD Flags,
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LPD3DXBUFFER* ppShader,
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LPD3DXBUFFER* ppErrorMsgs,
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LPD3DXCONSTANTTABLE* ppConstantTable );
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};
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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//
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// IMPLEMENTATION
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//
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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inline DxProxyModule::DxProxyModule( void )
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{
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m_hModule = NULL;
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ZeroMemory( m_arrFuncs, sizeof( m_arrFuncs ) );
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}
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inline DxProxyModule::~DxProxyModule( void )
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{
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Free();
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}
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inline BOOL DxProxyModule::Load( void )
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{
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if ( (m_hModule == NULL) &&
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( m_hModule = ::LoadLibrary( "dx_proxy.dll" ) ) != NULL )
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{
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// Requested function names array
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LPCSTR const arrFuncNames[fnTotal] = {
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"Proxy_D3DXCompileShaderFromFile"
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};
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// Acquire the functions
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for ( int k = 0; k < fnTotal; ++ k )
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{
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m_arrFuncs[k] = ::GetProcAddress( m_hModule, arrFuncNames[k] );
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}
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}
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return !!m_hModule;
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}
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inline void DxProxyModule::Free( void )
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{
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if ( m_hModule )
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{
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::FreeLibrary( m_hModule );
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m_hModule = NULL;
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ZeroMemory( m_arrFuncs, sizeof( m_arrFuncs ) );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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//
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// INTERFACE FUNCTIONS IMPLEMENTATION
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//
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//////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////
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inline HRESULT DxProxyModule::D3DXCompileShaderFromFile(
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LPCSTR pSrcFile,
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CONST D3DXMACRO* pDefines,
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LPD3DXINCLUDE pInclude,
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LPCSTR pFunctionName,
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LPCSTR pProfile,
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DWORD Flags,
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LPD3DXBUFFER* ppShader,
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LPD3DXBUFFER* ppErrorMsgs,
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LPD3DXCONSTANTTABLE* ppConstantTable )
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{
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if ( !Load() )
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return MAKE_HRESULT( SEVERITY_ERROR, FACILITY_ITF, 1 );
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if ( !m_arrFuncs[fnD3DXCompileShaderFromFile] )
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return MAKE_HRESULT( SEVERITY_ERROR, FACILITY_ITF, 2 );
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return
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( *
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( HRESULT (WINAPI *)
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( LPCSTR, CONST D3DXMACRO*, LPD3DXINCLUDE,
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LPCSTR, LPCSTR, DWORD, LPD3DXBUFFER*,
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LPD3DXBUFFER*, LPD3DXCONSTANTTABLE* )
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)
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m_arrFuncs[fnD3DXCompileShaderFromFile]
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)
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( pSrcFile, pDefines, pInclude, pFunctionName, pProfile, Flags, ppShader, ppErrorMsgs, ppConstantTable );
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}
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#endif // #ifndef DX_PROXY_H
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