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goldberg_emulator/overlay_experimental/windows/DX9_Hook.cpp

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/*
* Copyright (C) Nemirtingas
* This file is part of the ingame overlay project
*
* The ingame overlay project is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* The ingame overlay project is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the ingame overlay project; if not, see
* <http://www.gnu.org/licenses/>.
*/
#include "DX9_Hook.h"
#include "Windows_Hook.h"
#include "DirectX_VTables.h"
#include <imgui.h>
#include <backends/imgui_impl_dx9.h>
DX9_Hook* DX9_Hook::_inst = nullptr;
template<typename T>
inline void SafeRelease(T*& pUnk)
{
if (pUnk != nullptr)
{
pUnk->Release();
pUnk = nullptr;
}
}
bool DX9_Hook::StartHook(std::function<bool(bool)> key_combination_callback)
{
if (!_Hooked)
{
if (Reset == nullptr || Present == nullptr)
{
SPDLOG_WARN("Failed to hook DirectX 9: Rendering functions missing.");
return false;
}
if (!Windows_Hook::Inst()->StartHook(key_combination_callback))
return false;
_WindowsHooked = true;
SPDLOG_INFO("Hooked DirectX 9");
_Hooked = true;
BeginHook();
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)Reset, &DX9_Hook::MyReset),
std::make_pair<void**, void*>(&(PVOID&)Present, &DX9_Hook::MyPresent)
);
if (PresentEx != nullptr)
{
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)PresentEx, &DX9_Hook::MyPresentEx)
);
}
if (SwapChainPresent != nullptr)
{
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)SwapChainPresent, &DX9_Hook::MySwapChainPresent)
);
}
EndHook();
}
return true;
}
bool DX9_Hook::IsStarted()
{
return _Hooked;
}
void DX9_Hook::_ResetRenderState()
{
if (_Initialized)
{
OverlayHookReady(false);
ImGui_ImplDX9_Shutdown();
Windows_Hook::Inst()->_ResetRenderState();
ImGui::DestroyContext();
SafeRelease(_pDevice);
_LastWindow = nullptr;
_Initialized = false;
}
}
// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
void DX9_Hook::_PrepareForOverlay(IDirect3DDevice9 *pDevice, HWND destWindow)
{
if (!destWindow)
{
IDirect3DSwapChain9 *pSwapChain = nullptr;
if (pDevice->GetSwapChain(0, &pSwapChain) == D3D_OK)
{
D3DPRESENT_PARAMETERS params;
if (pSwapChain->GetPresentParameters(&params) == D3D_OK)
{
destWindow = params.hDeviceWindow;
}
pSwapChain->Release();
}
}
//Is this necessary anymore?
if (!destWindow)
{
D3DDEVICE_CREATION_PARAMETERS param;
pDevice->GetCreationParameters(&param);
destWindow = param.hFocusWindow;
}
// Workaround to detect if we changed window.
if (destWindow != _LastWindow || _pDevice != pDevice)
_ResetRenderState();
if (!_Initialized)
{
pDevice->AddRef();
_pDevice = pDevice;
ImGui::CreateContext();
ImGui_ImplDX9_Init(pDevice);
_LastWindow = destWindow;
_Initialized = true;
OverlayHookReady(true);
}
if (ImGui_ImplDX9_NewFrame() && Windows_Hook::Inst()->_PrepareForOverlay(destWindow))
{
ImGui::NewFrame();
OverlayProc();
ImGui::Render();
ImGui_ImplDX9_RenderDrawData(ImGui::GetDrawData());
}
}
HRESULT STDMETHODCALLTYPE DX9_Hook::MyReset(IDirect3DDevice9* _this, D3DPRESENT_PARAMETERS* pPresentationParameters)
{
auto inst = DX9_Hook::Inst();
inst->_ResetRenderState();
return (_this->*inst->Reset)(pPresentationParameters);
}
HRESULT STDMETHODCALLTYPE DX9_Hook::MyPresent(IDirect3DDevice9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion)
{
auto inst = DX9_Hook::Inst();
inst->_PrepareForOverlay(_this, hDestWindowOverride);
return (_this->*inst->Present)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion);
}
HRESULT STDMETHODCALLTYPE DX9_Hook::MyPresentEx(IDirect3DDevice9Ex* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags)
{
auto inst = DX9_Hook::Inst();
inst->_PrepareForOverlay(_this, hDestWindowOverride);
return (_this->*inst->PresentEx)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion, dwFlags);
}
HRESULT STDMETHODCALLTYPE DX9_Hook::MySwapChainPresent(IDirect3DSwapChain9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags)
{
IDirect3DDevice9* pDevice;
auto inst = DX9_Hook::Inst();
if (SUCCEEDED(_this->GetDevice(&pDevice)))
{
HWND destWindow = hDestWindowOverride;
if (!destWindow)
{
D3DPRESENT_PARAMETERS param;
if (_this->GetPresentParameters(&param) == D3D_OK)
{
destWindow = param.hDeviceWindow;
}
}
inst->_PrepareForOverlay(pDevice, destWindow);
pDevice->Release();
}
return (_this->*inst->SwapChainPresent)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion, dwFlags);
}
DX9_Hook::DX9_Hook():
_Initialized(false),
_Hooked(false),
_WindowsHooked(false),
_LastWindow(nullptr),
Present(nullptr),
PresentEx(nullptr),
Reset(nullptr)
{
}
DX9_Hook::~DX9_Hook()
{
SPDLOG_INFO("DX9 Hook removed");
if (_WindowsHooked)
delete Windows_Hook::Inst();
if (_Initialized)
{
ImGui_ImplDX9_InvalidateDeviceObjects();
ImGui::DestroyContext();
}
_inst = nullptr;
}
DX9_Hook* DX9_Hook::Inst()
{
if( _inst == nullptr )
_inst = new DX9_Hook;
return _inst;
}
std::string DX9_Hook::GetLibraryName() const
{
return LibraryName;
}
void DX9_Hook::LoadFunctions(decltype(Present) PresentFcn, decltype(Reset) ResetFcn, decltype(PresentEx) PresentExFcn, decltype(&IDirect3DSwapChain9::Present) SwapChainPresentFcn)
{
Present = PresentFcn;
Reset = ResetFcn;
PresentEx = PresentExFcn;
SwapChainPresent = SwapChainPresentFcn;
}
std::weak_ptr<uint64_t> DX9_Hook::CreateImageResource(const void* image_data, uint32_t width, uint32_t height)
{
IDirect3DTexture9** pTexture = new IDirect3DTexture9*(nullptr);
_pDevice->CreateTexture(
width,
height,
1,
D3DUSAGE_DYNAMIC,
D3DFMT_A8R8G8B8,
D3DPOOL_DEFAULT,
pTexture,
nullptr
);
if (*pTexture != nullptr)
{
D3DLOCKED_RECT rect;
if (SUCCEEDED((*pTexture)->LockRect(0, &rect, nullptr, D3DLOCK_DISCARD)))
{
const uint32_t* pixels = reinterpret_cast<const uint32_t*>(image_data);
uint8_t* texture_bits = reinterpret_cast<uint8_t*>(rect.pBits);
for (int32_t i = 0; i < height; ++i)
{
for (int32_t j = 0; j < width; ++j)
{
// RGBA to ARGB Conversion, DX9 doesn't have a RGBA loader
uint32_t color = *pixels++;
reinterpret_cast<uint32_t*>(texture_bits)[j] = ((color & 0xff) << 16) | (color & 0xff00) | ((color & 0xff0000) >> 16) | (color & 0xff000000);
}
texture_bits += rect.Pitch;
}
if (FAILED((*pTexture)->UnlockRect(0)))
{
(*pTexture)->Release();
delete pTexture;
pTexture = nullptr;
}
}
else
{
(*pTexture)->Release();
delete pTexture;
pTexture = nullptr;
}
}
if (pTexture == nullptr)
return std::shared_ptr<uint64_t>();
auto ptr = std::shared_ptr<uint64_t>((uint64_t*)pTexture, [](uint64_t* handle)
{
if (handle != nullptr)
{
IDirect3DTexture9** resource = reinterpret_cast<IDirect3DTexture9**>(handle);
(*resource)->Release();
delete resource;
}
});
_ImageResources.emplace(ptr);
return ptr;
}
void DX9_Hook::ReleaseImageResource(std::weak_ptr<uint64_t> resource)
{
auto ptr = resource.lock();
if (ptr)
{
auto it = _ImageResources.find(ptr);
if (it != _ImageResources.end())
_ImageResources.erase(it);
}
}
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