add ShaderPatch plugin

2019-10-04 15:46:47 +10:00
parent 2053a3ad20
commit 6a9c03c650
6 changed files with 494 additions and 0 deletions
@@ -0,0 +1,117 @@
+#define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
+#include <windows.h>
+
+#include "framework.h"
+//#include "PluginConfigApi.h"
+#include "detours.h"
+#pragma comment(lib, "detours.lib")
+
+#include <vector>
+#include <regex>
+
+void InjectCode(void* address, const std::vector<uint8_t> data)
+{
+	const size_t byteCount = data.size() * sizeof(uint8_t);
+
+	DWORD oldProtect;
+	VirtualProtect(address, byteCount, PAGE_EXECUTE_READWRITE, &oldProtect);
+	memcpy(address, data.data(), byteCount);
+	VirtualProtect(address, byteCount, oldProtect, nullptr);
+}
+
+void NopBytes(void* address, unsigned int num)
+{
+	std::vector<uint8_t> newbytes = {};
+
+	for (unsigned int i = 0; i < num; ++i) newbytes.push_back(0x90);
+
+	InjectCode(address, newbytes);
+}
+
+
+void hookedLoadFromFarcThunk(FArchivedFile** ppFile)
+{
+	loadFromFarcThunk(ppFile);
+
+	if (ppFile == nullptr || *ppFile == nullptr)
+		return;
+
+	FArchivedFile &file = **ppFile;
+
+	if (file.notLoadedFlag != 0)
+		return;
+
+	std::string modifiedStr = "";
+
+	for (ShaderPatchInfo &patch : patchesVec)
+	{
+		bool archMatches = false;
+
+		for (std::string &arch : patch.archs)
+		{
+			if (gpuName.size() >= arch.size() && gpuName.rfind(arch, 0) == 0)
+			{
+				archMatches = true;
+				break;
+			}
+		}
+
+		if (archMatches && std::regex_match(file.fileName.GetCharBuf(), patch.fileRegex))
+		{
+			if (modifiedStr.length() == 0)
+				modifiedStr = std::string(file.data, file.dataSize);
+
+			modifiedStr = std::regex_replace(modifiedStr, patch.dataRegex, patch.dataReplace);
+		}
+	}
+
+	if (modifiedStr.length() > 0)
+	{
+		file.data = _strdup(modifiedStr.c_str());
+		file.dataSize = modifiedStr.size();
+		printf("[ShaderPatch] Patched %s\n", file.fileName.GetCharBuf());
+	}
+}
+
+
+BOOL APIENTRY DllMain(HMODULE hModule,
+	DWORD  ul_reason_for_call,
+	LPVOID lpReserved
+)
+{
+	if (ul_reason_for_call == DLL_PROCESS_ATTACH)
+	{
+		// install a thunk to hook
+		InjectCode((void*)0x1405e5991, { 0x48, 0x83, 0xec, 0x20 });       // SUB  RSP, 0x20
+		InjectCode((void*)0x1405e5995, { 0xe8, 0x56, 0xe8, 0xb9, 0xff }); // CALL  0x1401841f0
+		InjectCode((void*)0x1405e599a, { 0x48, 0x83, 0xc4, 0x20 });       // ADD  RSP, 0x20
+		InjectCode((void*)0x1405e599e, { 0xc3 });                         // RET
+		InjectCode((void*)0x1405e534a, { 0xe8, 0x42, 0x06, 0x00, 0x00 }); // CALL  0x1405e5991
+
+		DisableThreadLibraryCalls(hModule);
+		DetourTransactionBegin();
+		DetourUpdateThread(GetCurrentThread());
+		DetourAttach(&(PVOID&)loadFromFarcThunk, (PVOID)hookedLoadFromFarcThunk);
+		DetourTransactionCommit();
+
+		loadGpuName();
+		printf("[ShaderPatch] Detected GPU: %s\n", gpuName);
+		//Sleep(2000);
+
+		LoadConfig();
+	}
+	return TRUE;
+}
+
+
+//using namespace PluginConfig;
+//
+//extern "C" __declspec(dllexport) LPCWSTR GetPluginName(void)
+//{
+//	return L"ShaderPatch";
+//}
+//
+//extern "C" __declspec(dllexport) LPCWSTR GetPluginDescription(void)
+//{
+//	return L"Automatically patches shaders";
+//}