Mounting multiple games
This code extends the Orange Box's AdditionalContentId system to support mounting of multiple Game Cache Files via the gameinfo.txt. It can be used with the Ep1 codebase too.
Warning:Your mod will run regardless of whether or not the user owns the game that you mount content for. If the game isn't owned the content will not be mounted, and error signs will appear everywhere instead!If the content you want to mount is required in order to play your mod properly, you may want to hard-code the ID instead of relying it to be in the gameinfo.txt. Remember when doing this that the int you pass to filesystem->MountSteamContent() must be negative!
Note:The code below is version 2, and has ditched the previous subkey approach. It is not compatible with the AdditionalContentId { 220,380 } gameinfo.txt scheme.Client
Search cdll_client_init.cpp for the MountAdditionalContent() function, and replace it with the code below.
If you don't already MountAdditionalContent() have, just add this function above CHLClient::Init, then call it right before if ( CommandLine()->FindParm( "-textmode" ) ).
static void MountAdditionalContent()
{
KeyValues *pMainFile, *pFileSystemInfo;
pMainFile = new KeyValues( "gameinfo.txt" );
if ( pMainFile->LoadFromFile( filesystem, VarArgs("%s/gameinfo.txt", engine->GetGameDirectory()), "MOD" ) )
{
pFileSystemInfo = pMainFile->FindKey( "FileSystem" );
if (pFileSystemInfo)
for ( KeyValues *pKey = pFileSystemInfo->GetFirstSubKey(); pKey; pKey = pKey->GetNextKey() )
{
if ( strcmp(pKey->GetName(),"AdditionalContentId") == 0 )
{
int appid = abs(pKey->GetInt());
if (appid)
if( filesystem->MountSteamContent(-appid) != FILESYSTEM_MOUNT_OK )
Warning("Unable to mount extra content with appId: %i\n", appid);
}
}
}
pMainFile->deleteThis();
}
Server
Search gameinterface.cpp for the MountAdditionalContent() function. Replace it with this code.
If you don't have it, just add it right above CServerGameDLL::DLLInit and call before the gpGlobals = pGlobals; line in that func.
static void MountAdditionalContent()
{
KeyValues *pMainFile, *pFileSystemInfo;
char gamePath[MAX_PATH];
engine->GetGameDir( gamePath, MAX_PATH );
Q_StripTrailingSlash( gamePath );
pMainFile = new KeyValues( "gameinfo.txt" );
#ifdef _LINUX
//On linux because of case sensitivity we need to check for both.
pMainFile->LoadFromFile( filesystem, UTIL_VarArgs("%s/GameInfo.txt", gamePath), "MOD" );
if (!pMainFile)
#endif
pMainFile->LoadFromFile( filesystem, UTIL_VarArgs("%s/gameinfo.txt", gamePath), "MOD" );
if (pMainFile)
{
pFileSystemInfo = pMainFile->FindKey( "FileSystem" );
if (pFileSystemInfo)
for ( KeyValues *pKey = pFileSystemInfo->GetFirstSubKey(); pKey; pKey = pKey->GetNextKey() )
{
if ( strcmp(pKey->GetName(),"AdditionalContentId") == 0 )
{
int appid = abs(pKey->GetInt());
if (appid)
if( filesystem->MountSteamContent(-appid) != FILESYSTEM_MOUNT_OK )
Warning("Unable to mount extra content with appId: %i\n", appid);
}
}
}
pMainFile->deleteThis();
}
Implementing in gameinfo.txt
Now you can mount content by adding something like this after the ToolsAppId:
AdditionalContentId 220 //HL2 AdditionalContentId 240 //CS Source AdditionalContentId 280 //HL Source AdditionalContentId 320 //HL2 Deatmatch AdditionalContentId 340 //HL2 Lost Coast AdditionalContentId 360 //HL Deathmatch: Source AdditionalContentId 380 //Ep1 AdditionalContentId 400 //Portal AdditionalContentId 420 //Ep2 AdditionalContentId 440 //TF2 AdditionalContentId 500 // L4D - has content incompatibilities! AdditionalContentId 550 // L4D2 - as above!
Don't forget to add the relevant SearchPaths too.
Bugs
Really big numbers will crash the game with an Error-Dialog by Valve. You could check if the value is within a certain range to stop this from happening, but I think the user will get by himself that this value cannot be mounted.
Confirm:filesystem->MountSteamContent returns FILESYSTEM_MOUNT_OK, even if the content is not available. There's nothing you can do about it, apart from poking some guy from Valvesoftware.