Misc.cpp

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmeapi.h>
#include <dsound.h>

#include "Tethys/API/TethysGame.h"

#include "Patcher.h"
#include "Util.h"
#include "Resources.h"

using namespace Tethys;
using namespace TethysAPI;
using namespace Patcher::Util;
using namespace Patcher::Registers;

// =====================================================================================================================
// Sets the game version per OP2_MAJOR_VERSION, OP2_MINOR_VERSION, OP2_STEPPING_VERSION defined in Version.h.
// This affects the version used for netplay compatibility checks, saved games, and a couple places in the UI not
// covered by resource replacements.
// ** TODO Hook saved game loading code to allow backward compatibility with older saved game files
bool SetGameVersion(
  bool enable)
{
  static Patcher::PatchContext patcher;
  bool success = true;

  if (enable) {
    // For netplay, TApp::Version()
    patcher.ReplaceReferencesToGlobal(0x4E973C, 1, OP2_VERSION_QUAD_STR);

    // For saved games
    // ** TODO Until back compat code is written, freeze this at the last version affecting the saved game format
    patcher.ReplaceReferencesToGlobal(0x4D6380, 1, "OUTPOST2 1.4.0-OPU SAVE");

    // For UI display
    patcher.ReplaceReferencesToGlobal(0x4E3200, 1, OP2_VERSION_TRIPLE_STR "-OPU");
    patcher.Write(0x566708 + 596,       "Version " OP2_VERSION_TRIPLE_STR "-OPU");

    success = (patcher.GetStatus() == PatcherStatus::Ok);
  }

  if ((enable == false) || (success == false)) {
    success &= (patcher.RevertAll() == PatcherStatus::Ok);
  }

  return success;
}

// =====================================================================================================================
// Disables checking for the Outpost 2 CD being inserted.
bool SetNoCdPatch(
  bool enable)
{
  static Patcher::PatchContext patcher;
  bool success = true;

  if (enable) {
    // In ResManager::VerifyCD()
    patcher.Write<uint8>(0x471900, 0xC3);  // 0x81
    // In ResManager::Init()
    patcher.Write<uint8>(0x47104D, 0xEB);  // 0x75
    // In ResManager::InitCDDir()
    patcher.Write<uint8>(0x471A17, 0xEB);  // 0x75

    success = (patcher.GetStatus() == PatcherStatus::Ok);
  }

  if ((enable == false) || (success == false)) {
    success &= (patcher.RevertAll() == PatcherStatus::Ok);
  }

  return success;
}

// =====================================================================================================================
// Fixes an issue with TethysGame::ForceMorale*() when playerNum is not set to all players, that would force it to 99
// no matter what unless called twice.
bool SetForceMoraleFix(
  bool enable)
{
  static Patcher::PatchContext patcher;
  bool success = true;

  if (enable) {
    // In GameImpl::ProcessGameOptPacket()
    patcher.LowLevelHook(0x422E0A, [](Eax<uint32> mask, Edi<CommandPacket*> pPacket) {
      for (auto& morale : g_gameImpl.forceMorale_) {
        morale &= ~mask;
      }
      reinterpret_cast<uint32*>(&g_gameImpl)[pPacket->data.gameOpt.offsetInDwords] |= mask;
      return 0x422E66;
    });

    success = (patcher.GetStatus() == PatcherStatus::Ok);
  }

  if ((enable == false) || (success == false)) {
    success &= (patcher.RevertAll() == PatcherStatus::Ok);
  }

  return success;
}

// =====================================================================================================================
// Allows music to continue playing when the game window is not active.
bool SetGlobalMusicFix(
  bool enable)
{
  static Patcher::PatchContext patcher;
  bool success = true;

  if (enable) {
    // In MusicManager::InitializeDirectSound()
    patcher.LowLevelHook(0x450719, [](Eax<DSBUFFERDESC*> pBufferDesc) { pBufferDesc->dwFlags |= DSBCAPS_GLOBALFOCUS; });
    success = (patcher.GetStatus() == PatcherStatus::Ok);
  }

  if ((enable == false) || (success == false)) {
    success &= (patcher.RevertAll() == PatcherStatus::Ok);
  }

  return success;
}

// =====================================================================================================================
// Fixes an issue with printf conversion of floats.
bool SetPrintfFloatFix(
  bool enable)
{
  static Patcher::PatchContext patcher;
  bool success = true;

  if (enable) {
    // In CRT __cftof()
    success = (patcher.Write<uint32>(0x4C55A2, 0x30303000) == PatcherStatus::Ok);  // add eax, 0x30303030 => 0x30303000
  }

  if ((enable == false) || (success == false)) {
    success &= (patcher.RevertAll() == PatcherStatus::Ok);
  }

  return success;
}