ReshadePluginsCore/UEngine/UEngine.cpp

// UEngine.cpp : Defines all Unreal Engine static tools functions
//
#include <Windows.h>
#include <string>
#include <optional>
#include <sstream>
#include <iomanip>
#include "UEngine.hpp"

std::optional<uint32_t> UE::CalculateOffset(const std::string& exeName, uint8_t* AOBResult)
{
    // R<>cup<75>re la base du module via GetModuleHandleA
    HMODULE hModule = GetModuleHandleA(exeName.c_str());
    if (!AOBResult)
        return std::nullopt;

    if (!hModule)
        hModule = GetModuleHandleA(nullptr);

    uintptr_t baseModule = reinterpret_cast<uintptr_t>(hModule);
    uintptr_t AOBAbsoluteAdress = reinterpret_cast<uintptr_t>(AOBResult);

    if (AOBAbsoluteAdress < baseModule)
        return std::nullopt;

    uintptr_t relativeOffset = AOBAbsoluteAdress - baseModule;
    return static_cast<uint32_t>(relativeOffset);
}