From d521c6736750981e3931163aa3e9036b8f9d4ab4 Mon Sep 17 00:00:00 2001
From: rexx <67599507+r-ex@users.noreply.github.com>
Date: Fri, 19 May 2023 20:21:11 +0100
Subject: [PATCH] Hook CMapLoadHelper ctor

This will be used for enabling bsp_lump file loading in the future
---
 r5dev/engine/modelloader.cpp |  9 +++++++++
 r5dev/engine/modelloader.h   | 28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/r5dev/engine/modelloader.cpp b/r5dev/engine/modelloader.cpp
index 04e06749..4bfe7b96 100644
--- a/r5dev/engine/modelloader.cpp
+++ b/r5dev/engine/modelloader.cpp
@@ -55,15 +55,24 @@ uint64_t CModelLoader::Map_LoadModelGuts(CModelLoader* loader, model_t* model)
 	return CModelLoader__Map_LoadModelGuts(loader, model);
 }
 
+void CMapLoadHelper::Constructor(CMapLoadHelper* helper, int lumpToLoad)
+{
+	CMapLoadHelper__CMapLoadHelper(helper, lumpToLoad);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 void VModelLoader::Attach() const
 {
 	DetourAttach((LPVOID*)&CModelLoader__LoadModel, &CModelLoader::LoadModel);
 	DetourAttach((LPVOID*)&CModelLoader__Map_LoadModelGuts, &CModelLoader::Map_LoadModelGuts);
+
+	DetourAttach((LPVOID*)&CMapLoadHelper__CMapLoadHelper, &CMapLoadHelper::Constructor);
 }
 
 void VModelLoader::Detach() const
 {
 	DetourDetach((LPVOID*)&CModelLoader__LoadModel, &CModelLoader::LoadModel);
 	DetourDetach((LPVOID*)&CModelLoader__Map_LoadModelGuts, &CModelLoader::Map_LoadModelGuts);
+
+	DetourDetach((LPVOID*)&CMapLoadHelper__CMapLoadHelper, &CMapLoadHelper::Constructor);
 }
\ No newline at end of file
diff --git a/r5dev/engine/modelloader.h b/r5dev/engine/modelloader.h
index daa58c68..25384f16 100644
--- a/r5dev/engine/modelloader.h
+++ b/r5dev/engine/modelloader.h
@@ -50,6 +50,27 @@ public:
 	static uint64_t Map_LoadModelGuts(CModelLoader* loader, model_t* model);
 };
 
+class CMapLoadHelper
+{
+public:
+	static void Constructor(CMapLoadHelper* helper, int lumpToLoad);
+
+
+public:
+	int m_nLumpSize;
+	int m_nLumpOffset;
+	int m_nLumpVersion;
+	unsigned __int8* m_pRawData;
+	char* m_pData;
+	unsigned __int8* m_pUncompressedData;
+	char gap_28[5];
+	bool m_bExternal;
+	bool m_bUnk;
+	char gap_2F;
+	int m_nLumpID;
+	char m_szLumpFilename[260];
+};
+
 inline CMemory p_CModelLoader__FindModel;
 inline auto CModelLoader__FindModel = p_CModelLoader__FindModel.RCast<void* (*)(CModelLoader* loader, const char* pszModelName)>();
 
@@ -68,6 +89,9 @@ inline auto CModelLoader__Map_LoadModelGuts = p_CModelLoader__Map_LoadModelGuts.
 inline CMemory p_CModelLoader__Map_IsValid;
 inline auto CModelLoader__Map_IsValid = p_CModelLoader__Map_IsValid.RCast<bool(*)(CModelLoader* loader, const char* pszMapName)>();
 
+inline CMemory p_CMapLoadHelper__CMapLoadHelper;
+inline auto CMapLoadHelper__CMapLoadHelper = p_CMapLoadHelper__CMapLoadHelper.RCast<void(__fastcall*)(CMapLoadHelper * helper, int lumpToLoad)>();
+
 //inline CMemory p_GetSpriteInfo; // DEDICATED PATCH!
 //inline auto GetSpriteInfo = p_GetSpriteInfo.RCast<void* (*)(const char* pName, bool bIsAVI, bool bIsBIK, int& nWidth, int& nHeight, int& nFrameCount, void* a7)>();
 
@@ -111,6 +135,10 @@ class VModelLoader : public IDetour
 		//p_GetSpriteInfo                   = g_GameDll.FindPatternSIMD("48 89 5C 24 ?? 48 89 6C 24 ?? 48 89 74 24 ?? 57 41 54 41 55 41 56 41 57 48 83 EC 30 4C 8B BC 24 ?? ?? ?? ??");
 #endif
 		//p_BuildSpriteLoadName             = g_GameDll.FindPatternSIMD("48 89 5C 24 ?? 48 89 6C 24 ?? 48 89 74 24 ?? 48 89 7C 24 ?? 41 56 48 81 EC ?? ?? ?? ?? 4D 8B F1 48 8B F2");
+		
+		p_CMapLoadHelper__CMapLoadHelper = g_GameDll.FindPatternSIMD("48 89 5C 24 ?? 48 89 7C 24 ?? 41 56 48 81 EC 60");
+
+		CMapLoadHelper__CMapLoadHelper = p_CMapLoadHelper__CMapLoadHelper.RCast<void(__fastcall*)(CMapLoadHelper*, int)>();
 
 		CModelLoader__FindModel         = p_CModelLoader__FindModel.RCast<void* (*)(CModelLoader*, const char*)>();
 		CModelLoader__LoadModel         = p_CModelLoader__LoadModel.RCast<void(*)(CModelLoader*, model_t*)>();