goldberg_emulator/overlay_experimental/DX10_Hook.cpp

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#include "../dll/base.h"
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#ifndef NO_OVERLAY
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#include "DX10_Hook.h"
#include "Hook_Manager.h"
#include <imgui.h>
#include <impls/imgui_impl_win32.h>
#include <impls/imgui_impl_dx10.h>
// This is created by DX10_Hook::Create, and deleted by the Hook_Manager if not used
static DX10_Hook* hook;
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void DX10_Hook::start_hook()
{
if (!_hooked)
{
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Hook_Manager::Inst().FoundRenderer(this);
IDXGISwapChain* pSwapChain;
ID3D10Device* pDevice;
DXGI_SWAP_CHAIN_DESC SwapChainDesc = {};
decltype(D3D10CreateDeviceAndSwapChain)* D3D10CreateDeviceAndSwapChain =
(decltype(D3D10CreateDeviceAndSwapChain))GetProcAddress(_dll, "D3D10CreateDeviceAndSwapChain");
SwapChainDesc.BufferCount = 1;
SwapChainDesc.BufferDesc.Width = 1;
SwapChainDesc.BufferDesc.Height = 1;
SwapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
SwapChainDesc.BufferDesc.RefreshRate.Numerator = 0;
SwapChainDesc.BufferDesc.RefreshRate.Denominator = 0;
SwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
SwapChainDesc.OutputWindow = GetForegroundWindow();
SwapChainDesc.SampleDesc.Count = 1;
SwapChainDesc.SampleDesc.Quality = 0;
SwapChainDesc.Windowed = TRUE;
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D3D10CreateDeviceAndSwapChain(NULL, D3D10_DRIVER_TYPE_HARDWARE, NULL, 0, D3D10_SDK_VERSION, &SwapChainDesc, &pSwapChain, &pDevice);
if (pDevice != nullptr && pSwapChain != nullptr)
{
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_hooked = true;
PRINT_DEBUG("Hooked DirectX 10\n");
loadFunctions(pDevice, pSwapChain);
UnhookAll();
BeginHook();
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::Present, &DX10_Hook::MyPresent),
std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::ResizeTarget, &DX10_Hook::MyResizeTarget),
std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::ResizeBuffers, &DX10_Hook::MyResizeBuffers)
);
EndHook();
}
else
{
PRINT_DEBUG("Failed to hook DirectX 10\n");
}
if(pDevice)pDevice->Release();
if(pSwapChain)pSwapChain->Release();
}
}
void DX10_Hook::resetRenderState()
{
if (initialized)
{
mainRenderTargetView->Release();
ImGui_ImplDX10_Shutdown();
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ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
initialized = false;
}
}
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// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
void DX10_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
{
DXGI_SWAP_CHAIN_DESC desc;
pSwapChain->GetDesc(&desc);
if (!initialized)
{
if (FAILED(pSwapChain->GetDevice(__uuidof(ID3D10Device), (PVOID*)& pDevice)))
return;
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.IniFilename = NULL;
ID3D10Texture2D* pBackBuffer;
pSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), (LPVOID*)& pBackBuffer);
pDevice->CreateRenderTargetView(pBackBuffer, NULL, &mainRenderTargetView);
pBackBuffer->Release();
Hook_Manager::Inst().ChangeGameWindow(desc.OutputWindow);
ImGui_ImplWin32_Init(desc.OutputWindow);
ImGui_ImplDX10_Init(pDevice);
initialized = true;
}
ImGui_ImplDX10_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
Hook_Manager::Inst().CallOverlayProc(desc.BufferDesc.Width, desc.BufferDesc.Height);
ImGui::EndFrame();
ImGui::Render();
pDevice->OMSetRenderTargets(1, &mainRenderTargetView, NULL);
ImGui_ImplDX10_RenderDrawData(ImGui::GetDrawData());
}
/////////////////////////////////////////////////////////////////////////////////////
// DirectX 10 Initialization functions
//HRESULT WINAPI DX10_Hook::MyD3D10CreateDevice(IDXGIAdapter* pAdapter, D3D10_DRIVER_TYPE DriverType, HMODULE Software, UINT Flags, UINT SDKVersion, ID3D10Device** ppDevice)
//{
// auto res = _D3D10CreateDevice(pAdapter, DriverType, Software, Flags, SDKVersion, ppDevice);
//
// if (SUCCEEDED(res))
// hook->hook_dx10(SDKVersion);
//
// return res;
//}
//HRESULT WINAPI DX10_Hook::MyD3D10CreateDeviceAndSwapChain(IDXGIAdapter* pAdapter, D3D10_DRIVER_TYPE DriverType, HMODULE Software, UINT Flags, UINT SDKVersion,
// DXGI_SWAP_CHAIN_DESC* pSwapChainDesc, IDXGISwapChain** ppSwapChain, ID3D10Device** ppDevice)
//{
// auto res = hook->D3D10CreateDeviceAndSwapChain(pAdapter, DriverType, Software, Flags, SDKVersion, pSwapChainDesc, ppSwapChain, ppDevice);
//
// if (SUCCEEDED(res))
// hook->hook_dx10(SDKVersion);
//
// return res;
//}
/////////////////////////////////////////////////////////////////////////////////////
HRESULT STDMETHODCALLTYPE DX10_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
{
hook->prepareForOverlay(_this);
return (_this->*hook->Present)(SyncInterval, Flags);
}
HRESULT STDMETHODCALLTYPE DX10_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
{
hook->resetRenderState();
return (_this->*hook->ResizeTarget)(pNewTargetParameters);
}
HRESULT STDMETHODCALLTYPE DX10_Hook::MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags)
{
hook->resetRenderState();
return (_this->*hook->ResizeBuffers)(BufferCount, Width, Height, NewFormat, SwapChainFlags);
}
DX10_Hook::DX10_Hook():
initialized(false),
pDevice(nullptr),
mainRenderTargetView(nullptr)
{
_dll = GetModuleHandle(DLL_NAME);
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// Hook to D3D10CreateDevice and D3D10CreateDeviceAndSwapChain so we know when it gets called.
// If its called, then DX10 will be used to render the overlay.
//_D3D10CreateDevice = (decltype(_D3D10CreateDevice))GetProcAddress(_dll, "D3D10CreateDevice");
//D3D10CreateDeviceAndSwapChain = (decltype(D3D10CreateDeviceAndSwapChain))GetProcAddress(_dll, "D3D10CreateDeviceAndSwapChain");
//
//BeginHook();
//HookFuncs(
// //std::make_pair<void**, void*>(&(PVOID&)_D3D10CreateDevice, &DX10_Hook::MyD3D10CreateDevice),
// std::make_pair<void**, void*>(&(PVOID&)D3D10CreateDeviceAndSwapChain, &DX10_Hook::MyD3D10CreateDeviceAndSwapChain)
//);
//EndHook();
}
DX10_Hook::~DX10_Hook()
{
PRINT_DEBUG("DX10 Hook removed\n");
if (_hooked)
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resetRenderState();
hook = nullptr;
}
void DX10_Hook::Create()
{
if (hook == nullptr)
{
hook = new DX10_Hook;
hook->start_hook();
// Register the hook to the Hook Manager
Hook_Manager::Inst().AddHook(hook);
}
}
void DX10_Hook::loadFunctions(ID3D10Device *pDevice, IDXGISwapChain *pSwapChain)
{
void** vTable = *reinterpret_cast<void***>(pDevice);
#define LOAD_FUNC(X) (void*&)X = vTable[(int)ID3D10DeviceVTable::X]
#undef LOAD_FUNC
vTable = *reinterpret_cast<void***>(pSwapChain);
#define LOAD_FUNC(X) (void*&)X = vTable[(int)IDXGISwapChainVTable::X]
LOAD_FUNC(Present);
LOAD_FUNC(ResizeBuffers);
LOAD_FUNC(ResizeTarget);
#undef LOAD_FUNC
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}
#endif//NO_OVERLAY