184 lines
4.3 KiB
C++
184 lines
4.3 KiB
C++
/*
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game.cpp -- executable to run Xash Engine
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Copyright (C) 2011 Uncle Mike
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include "port.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#if defined(__APPLE__) || defined(__unix__)
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#define XASHLIB "libxash." OS_LIB_EXT
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#elif _WIN32
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#if !__MINGW32__ && _MSC_VER >= 1200
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#define USE_WINMAIN
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#endif
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#define XASHLIB "xash.dll"
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#define dlerror() GetStringLastError()
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#include <shellapi.h> // CommandLineToArgvW
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#endif
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#ifdef WIN32
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extern "C"
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{
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// Enable NVIDIA High Performance Graphics while using Integrated Graphics.
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__declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
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// Enable AMD High Performance Graphics while using Integrated Graphics.
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__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
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}
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#endif
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#define GAME_PATH "valve" // default dir to start from
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typedef void (*pfnChangeGame)( const char *progname );
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typedef int (*pfnInit)( int argc, char **argv, const char *progname, int bChangeGame, pfnChangeGame func );
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typedef void (*pfnShutdown)( void );
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static pfnInit Xash_Main;
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static pfnShutdown Xash_Shutdown = NULL;
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static char szGameDir[128]; // safe place to keep gamedir
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static int szArgc;
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static char **szArgv;
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static HINSTANCE hEngine;
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static void Xash_Error( const char *szFmt, ... )
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{
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static char buffer[16384]; // must support > 1k messages
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va_list args;
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va_start( args, szFmt );
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vsnprintf( buffer, sizeof(buffer), szFmt, args );
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va_end( args );
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#if defined( _WIN32 )
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MessageBoxA( NULL, buffer, "Xash Error", MB_OK );
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#else
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fprintf( stderr, "Xash Error: %s\n", buffer );
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#endif
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exit( 1 );
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}
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#ifdef _WIN32
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static const char *GetStringLastError()
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{
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static char buf[1024];
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FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, GetLastError(), MAKELANGID( LANG_ENGLISH, SUBLANG_DEFAULT ),
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buf, sizeof( buf ), NULL );
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return buf;
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}
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#endif
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static void Sys_LoadEngine( void )
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{
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if(( hEngine = LoadLibrary( XASHLIB )) == NULL )
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{
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Xash_Error("Unable to load the " XASHLIB ": %s", dlerror() );
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}
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if(( Xash_Main = (pfnInit)GetProcAddress( hEngine, "Host_Main" )) == NULL )
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{
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Xash_Error( XASHLIB " missed 'Host_Main' export: %s", dlerror() );
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}
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// this is non-fatal for us but change game will not working
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Xash_Shutdown = (pfnShutdown)GetProcAddress( hEngine, "Host_Shutdown" );
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}
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static void Sys_UnloadEngine( void )
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{
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if( Xash_Shutdown ) Xash_Shutdown( );
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if( hEngine ) FreeLibrary( hEngine );
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Xash_Main = NULL;
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Xash_Shutdown = NULL;
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}
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static void Sys_ChangeGame( const char *progname )
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{
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if( !progname || !progname[0] )
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Xash_Error( "Sys_ChangeGame: NULL gamedir" );
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if( Xash_Shutdown == NULL )
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Xash_Error( "Sys_ChangeGame: missed 'Host_Shutdown' export\n" );
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strncpy( szGameDir, progname, sizeof( szGameDir ) - 1 );
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Sys_UnloadEngine ();
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Sys_LoadEngine ();
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Xash_Main( szArgc, szArgv, szGameDir, 1, Sys_ChangeGame );
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}
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_inline int Sys_Start( void )
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{
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int ret;
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pfnChangeGame changeGame = NULL;
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Sys_LoadEngine();
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#ifndef XASH_DISABLE_MENU_CHANGEGAME
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if( Xash_Shutdown )
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changeGame = Sys_ChangeGame;
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#endif
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ret = Xash_Main( szArgc, szArgv, GAME_PATH, 0, changeGame );
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Sys_UnloadEngine();
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return ret;
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}
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#ifndef USE_WINMAIN
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int main( int argc, char **argv )
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{
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szArgc = argc;
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szArgv = argv;
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return Sys_Start();
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}
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#else
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//#pragma comment(lib, "shell32.lib")
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int __stdcall WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR cmdLine, int nShow )
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{
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LPWSTR* lpArgv;
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int ret, i;
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lpArgv = CommandLineToArgvW( GetCommandLineW(), &szArgc );
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szArgv = ( char** )malloc( (szArgc + 1) * sizeof( char* ));
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for( i = 0; i < szArgc; ++i )
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{
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int size = wcslen(lpArgv[i]) + 1;
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szArgv[i] = ( char* )malloc( size );
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wcstombs( szArgv[i], lpArgv[i], size );
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}
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szArgv[szArgc] = 0;
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LocalFree( lpArgv );
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ret = Sys_Start();
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for( ; i < szArgc; ++i )
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free( szArgv[i] );
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free( szArgv );
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return ret;
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}
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#endif
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