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#include "pch.h"
#include "rpakfilesystem.h"
#include "hookutils.h"
#include "modmanager.h"
typedef void* (*LoadCommonPaksForMapType)(char* map);
LoadCommonPaksForMapType LoadCommonPaksForMap;
typedef void* (*LoadPakSyncType)(const char* path, void* unknownSingleton, int flags);
typedef int (*LoadPakAsyncType)(const char* path, void* unknownSingleton, int flags, void* callback0, void* callback1);
typedef void* (*ReadFullFileFromDiskType)(const char* requestedPath, void* a2);
// there are more i'm just too lazy to add
struct PakLoadFuncs
{
void* unk0[2];
LoadPakSyncType LoadPakSync;
LoadPakAsyncType LoadPakAsync;
void* unk1[20];
ReadFullFileFromDiskType ReadFullFileFromDisk;
};
PakLoadFuncs* g_pakLoadApi;
void** pUnknownPakLoadSingleton;
PakLoadManager* g_PakLoadManager;
void PakLoadManager::LoadPakSync(const char* path) { g_pakLoadApi->LoadPakSync(path, *pUnknownPakLoadSingleton, 0); }
void PakLoadManager::LoadPakAsync(const char* path) { g_pakLoadApi->LoadPakAsync(path, *pUnknownPakLoadSingleton, 2, nullptr, nullptr); }
void HandlePakAliases(char** map)
{
// convert the pak being loaded to it's aliased one, e.g. aliasing mp_hub_timeshift => sp_hub_timeshift
for (int64_t i = g_ModManager->m_loadedMods.size() - 1; i > -1; i--)
{
Mod* mod = &g_ModManager->m_loadedMods[i];
if (!mod->Enabled)
continue;
if (mod->RpakAliases.find(*map) != mod->RpakAliases.end())
{
*map = &mod->RpakAliases[*map][0];
return;
}
}
}
void LoadPreloadPaks()
{
// note, loading from ./ is necessary otherwise paks will load from gamedir/r2/paks
for (Mod& mod : g_ModManager->m_loadedMods)
{
if (!mod.Enabled)
continue;
// need to get a relative path of mod to mod folder
fs::path modPakPath("./" / mod.ModDirectory / "paks");
for (ModRpakEntry& pak : mod.Rpaks)
if (pak.m_bAutoLoad)
g_PakLoadManager->LoadPakAsync((modPakPath / pak.m_sPakName).string().c_str());
}
}
void LoadCustomMapPaks(char** pakName)
{
// whether the vanilla game has this rpak
bool bHasOriginalPak = fs::exists(fs::path("./r2/paks") / *pakName);
// note, loading from ./ is necessary otherwise paks will load from gamedir/r2/paks
for (Mod& mod : g_ModManager->m_loadedMods)
{
if (!mod.Enabled)
continue;
// need to get a relative path of mod to mod folder
fs::path modPakPath("./" / mod.ModDirectory / "paks");
for (ModRpakEntry& pak : mod.Rpaks)
{
if (!pak.m_bAutoLoad && !pak.m_sPakName.compare(*pakName))
{
// if the game doesn't have the original pak, let it handle loading this one as if it was the one it was loading originally
if (!bHasOriginalPak)
{
*pakName = &pak.m_sPakName[0];
bHasOriginalPak = true;
}
else
g_PakLoadManager->LoadPakAsync((modPakPath / pak.m_sPakName).string().c_str());
}
}
}
}
LoadPakSyncType LoadPakSyncOriginal;
void* LoadPakSyncHook(char* path, void* unknownSingleton, int flags)
{
HandlePakAliases(&path);
// note: we don't handle loading any preloaded custom paks synchronously since LoadPakSync is never actually called in retail, just load
// them async instead
static bool bShouldLoadPaks = true;
if (bShouldLoadPaks)
{
// disable preloading while we're doing this
bShouldLoadPaks = false;
LoadPreloadPaks();
LoadCustomMapPaks(&path);
bShouldLoadPaks = true;
}
spdlog::info("LoadPakSync {}", path);
return LoadPakSyncOriginal(path, unknownSingleton, flags);
}
LoadPakAsyncType LoadPakAsyncOriginal;
int LoadPakAsyncHook(char* path, void* unknownSingleton, int flags, void* callback0, void* callback1)
{
HandlePakAliases(&path);
static bool bShouldLoadPaks = true;
if (bShouldLoadPaks)
{
// disable preloading while we're doing this
bShouldLoadPaks = false;
LoadPreloadPaks();
LoadCustomMapPaks(&path);
bShouldLoadPaks = true;
}
int ret = LoadPakAsyncOriginal(path, unknownSingleton, flags, callback0, callback1);
spdlog::info("LoadPakAsync {} {}", path, ret);
return ret;
}
// we hook this exclusively for resolving stbsp paths, but seemingly it's also used for other stuff like vpk and rpak loads
// possibly just async loading all together?
ReadFullFileFromDiskType ReadFullFileFromDiskOriginal;
void* ReadFullFileFromDiskHook(const char* requestedPath, void* a2)
{
fs::path path(requestedPath);
char* allocatedNewPath = nullptr;
if (path.extension() == ".stbsp")
{
fs::path filename = path.filename();
spdlog::info("LoadStreamBsp: {}", filename.string());
// resolve modded stbsp path so we can load mod stbsps
auto modFile = g_ModManager->m_modFiles.find(fs::path("maps" / filename).lexically_normal().string());
if (modFile != g_ModManager->m_modFiles.end())
{
// need to allocate a new string for this
std::string newPath = (modFile->second.owningMod->ModDirectory / "mod" / modFile->second.path).string();
allocatedNewPath = new char[newPath.size() + 1];
strncpy(allocatedNewPath, newPath.c_str(), newPath.size());
allocatedNewPath[newPath.size() + 1] = '\0';
requestedPath = allocatedNewPath;
}
}
void* ret = ReadFullFileFromDiskOriginal(requestedPath, a2);
if (allocatedNewPath)
delete[] allocatedNewPath;
return ret;
}
void InitialiseEngineRpakFilesystem(HMODULE baseAddress)
{
g_PakLoadManager = new PakLoadManager;
g_pakLoadApi = *(PakLoadFuncs**)((char*)baseAddress + 0x5BED78);
pUnknownPakLoadSingleton = (void**)((char*)baseAddress + 0x7C5E20);
HookEnabler hook;
ENABLER_CREATEHOOK(hook, g_pakLoadApi->LoadPakSync, &LoadPakSyncHook, reinterpret_cast<LPVOID*>(&LoadPakSyncOriginal));
ENABLER_CREATEHOOK(hook, g_pakLoadApi->LoadPakAsync, &LoadPakAsyncHook, reinterpret_cast<LPVOID*>(&LoadPakAsyncOriginal));
ENABLER_CREATEHOOK(
hook, g_pakLoadApi->ReadFullFileFromDisk, &ReadFullFileFromDiskHook, reinterpret_cast<LPVOID*>(&ReadFullFileFromDiskOriginal));
}
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