gbe_fork/overlay_experimental/DX11_Hook.cpp
2019-08-14 15:09:57 +02:00

236 lines
7.8 KiB
C++

#include "../dll/base.h"
#ifndef NO_OVERLAY
#include "DX11_Hook.h"
#include "Hook_Manager.h"
#include <imgui.h>
#include <impls/imgui_impl_win32.h>
#include <impls/imgui_impl_dx11.h>
// This is created by DX11_Hook::Create, and deleted by the Hook_Manager if not used
static DX11_Hook* hook;
HRESULT GetDeviceAndCtxFromSwapchain(IDXGISwapChain* pSwapChain, ID3D11Device** ppDevice, ID3D11DeviceContext** ppContext)
{
HRESULT ret = pSwapChain->GetDevice(__uuidof(ID3D11Device), (PVOID*)ppDevice);
if (SUCCEEDED(ret))
(*ppDevice)->GetImmediateContext(ppContext);
return ret;
}
void DX11_Hook::hook_dx11(UINT SDKVersion)
{
if (!_hooked)
{
_hooked = true;
Hook_Manager::Inst().FoundHook(this);
IDXGISwapChain* pSwapChain;
ID3D11Device* pDevice;
DXGI_SWAP_CHAIN_DESC SwapChainDesc = {};
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;
D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, 0, NULL, NULL, SDKVersion, &SwapChainDesc, &pSwapChain, &pDevice, NULL, NULL);
if (pDevice != nullptr && pSwapChain != nullptr)
{
PRINT_DEBUG("Hooked DirectX 11\n");
loadFunctions(pDevice, pSwapChain);
UnhookAll();
BeginHook();
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::Present, &DX11_Hook::MyPresent),
std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::ResizeTarget, &DX11_Hook::MyResizeTarget),
std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::ResizeBuffers, &DX11_Hook::MyResizeBuffers)
);
EndHook();
}
else
{
PRINT_DEBUG("Failed to hook DirectX 11\n");
_hooked = false;
}
if(pDevice) pDevice->Release();
if(pSwapChain) pSwapChain->Release();
}
}
void DX11_Hook::resetRenderState()
{
if (initialized)
{
mainRenderTargetView->Release();
pContext->Release();
ImGui_ImplDX11_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
initialized = false;
}
}
// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
void DX11_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
{
DXGI_SWAP_CHAIN_DESC desc;
pSwapChain->GetDesc(&desc);
if (!initialized)
{
ID3D11Device* pDevice = nullptr;
if (FAILED(GetDeviceAndCtxFromSwapchain(pSwapChain, &pDevice, &pContext)))
return;
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.IniFilename = NULL;
ID3D11Texture2D* pBackBuffer;
pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)& pBackBuffer);
pDevice->CreateRenderTargetView(pBackBuffer, NULL, &mainRenderTargetView);
pBackBuffer->Release();
Hook_Manager::Inst().ChangeGameWindow(desc.OutputWindow);
ImGui_ImplWin32_Init(desc.OutputWindow);
ImGui_ImplDX11_Init(pDevice, pContext);
initialized = true;
}
ImGui_ImplDX11_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
Hook_Manager::Inst().CallOverlayProc(desc.BufferDesc.Width, desc.BufferDesc.Height);
ImGui::EndFrame();
ImGui::Render();
pContext->OMSetRenderTargets(1, &mainRenderTargetView, NULL);
ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
}
/////////////////////////////////////////////////////////////////////////////////////
// DirectX 11 Initialization functions
//HRESULT WINAPI DX11_Hook::MyD3D11CreateDevice(__in_opt IDXGIAdapter* pAdapter, D3D_DRIVER_TYPE DriverType, HMODULE Software, UINT Flags,
// __in_ecount_opt(FeatureLevels) CONST D3D_FEATURE_LEVEL* pFeatureLevels, UINT FeatureLevels, UINT SDKVersion, __out_opt ID3D11Device** ppDevice,
// __out_opt D3D_FEATURE_LEVEL* pFeatureLevel, __out_opt ID3D11DeviceContext** ppImmediateContext)
//{
// auto res = _D3D11CreateDevice(pAdapter, DriverType, Software, Flags, pFeatureLevels, FeatureLevels, SDKVersion, ppDevice, pFeatureLevel, ppImmediateContext);
//
// if (SUCCEEDED(res))
// hook->hook_dx11(SDKVersion);
//
// return res;
//}
HRESULT WINAPI DX11_Hook::MyD3D11CreateDeviceAndSwapChain(__in_opt IDXGIAdapter* pAdapter, D3D_DRIVER_TYPE DriverType, HMODULE Software, UINT Flags,
__in_ecount_opt(FeatureLevels) CONST D3D_FEATURE_LEVEL* pFeatureLevels, UINT FeatureLevels, UINT SDKVersion,
__in_opt CONST DXGI_SWAP_CHAIN_DESC* pSwapChainDesc, __out_opt IDXGISwapChain** ppSwapChain, __out_opt ID3D11Device** ppDevice,
__out_opt D3D_FEATURE_LEVEL* pFeatureLevel, __out_opt ID3D11DeviceContext** ppImmediateContext)
{
auto res = hook->D3D11CreateDeviceAndSwapChain(pAdapter, DriverType, Software, Flags, pFeatureLevels, FeatureLevels, SDKVersion, pSwapChainDesc, ppSwapChain, ppDevice, pFeatureLevel, ppImmediateContext);
if (SUCCEEDED(res))
hook->hook_dx11(SDKVersion);
return res;
}
/////////////////////////////////////////////////////////////////////////////////////
HRESULT STDMETHODCALLTYPE DX11_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
{
hook->prepareForOverlay(_this);
return (_this->*hook->Present)(SyncInterval, Flags);
}
HRESULT STDMETHODCALLTYPE DX11_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
{
hook->resetRenderState();
return (_this->*hook->ResizeTarget)(pNewTargetParameters);
}
HRESULT STDMETHODCALLTYPE DX11_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);
}
DX11_Hook::DX11_Hook():
initialized(false),
pContext(nullptr),
mainRenderTargetView(nullptr)
{
_dll = GetModuleHandle(DLL_NAME);
_hooked = false;
// Hook to D3D11CreateDevice and D3D11CreateDeviceAndSwapChain so we know when it gets called.
// If its called, then DX11 will be used to render the overlay.
//_D3D11CreateDevice = (decltype(_D3D11CreateDevice))GetProcAddress(_dll, "D3D11CreateDevice");
D3D11CreateDeviceAndSwapChain = (decltype(D3D11CreateDeviceAndSwapChain))GetProcAddress(_dll, "D3D11CreateDeviceAndSwapChain");
BeginHook();
HookFuncs(
//std::make_pair<void**, void*>(&(PVOID&)_D3D11CreateDevice, &DX11_Hook::MyD3D11CreateDevice),
std::make_pair<void**, void*>(&(PVOID&)D3D11CreateDeviceAndSwapChain, &DX11_Hook::MyD3D11CreateDeviceAndSwapChain)
);
EndHook();
}
DX11_Hook::~DX11_Hook()
{
PRINT_DEBUG("DX11 Hook removed\n");
if (_hooked)
resetRenderState();
hook = nullptr;
}
void DX11_Hook::Create()
{
if (hook == nullptr)
{
hook = new DX11_Hook;
// Register the hook to the Hook Manager
Hook_Manager::Inst().AddHook(hook);
}
}
void DX11_Hook::loadFunctions(ID3D11Device *pDevice, IDXGISwapChain *pSwapChain)
{
void** vTable = *reinterpret_cast<void***>(pDevice);
#define LOAD_FUNC(X) (void*&)X = vTable[(int)ID3D11DeviceVTable::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
}
#endif//NO_OVERLAY