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goldberg_emulator/overlay_experimental/windows/DX12_Hook.cpp

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#include "DX12_Hook.h"
#include "Windows_Hook.h"
#include "../Renderer_Detector.h"
#include "../../dll/dll.h"
#ifndef NO_OVERLAY
#include <imgui.h>
#include <impls/windows/imgui_impl_dx12.h>
#include <dxgi1_4.h>
DX12_Hook* DX12_Hook::_inst = nullptr;
bool DX12_Hook::start_hook()
{
bool res = true;
if (!hooked)
{
if (!Windows_Hook::Inst()->start_hook())
return false;
PRINT_DEBUG("Hooked DirectX 12\n");
hooked = true;
Renderer_Detector::Inst().renderer_found(this);
BeginHook();
HookFuncs(
std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::Present, &DX12_Hook::MyPresent),
std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ResizeTarget, &DX12_Hook::MyResizeTarget),
std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ResizeBuffers, &DX12_Hook::MyResizeBuffers),
std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ExecuteCommandLists, &DX12_Hook::MyExecuteCommandLists)
);
EndHook();
get_steam_client()->steam_overlay->HookReady();
}
return res;
}
void DX12_Hook::resetRenderState()
{
if (initialized)
{
pSrvDescHeap->Release();
for (UINT i = 0; i < bufferCount; ++i)
pCmdAlloc[i]->Release();
pRtvDescHeap->Release();
delete[]pMainRenderTargets;
delete[]pCmdAlloc;
ImGui_ImplDX12_Shutdown();
Windows_Hook::Inst()->resetRenderState();
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 DX12_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
{
if (pCmdQueue == nullptr)
return;
ID3D12CommandQueue* pCmdQueue = this->pCmdQueue;
IDXGISwapChain3* pSwapChain3 = nullptr;
DXGI_SWAP_CHAIN_DESC sc_desc;
pSwapChain->QueryInterface(IID_PPV_ARGS(&pSwapChain3));
if (pSwapChain3 == nullptr)
return;
pSwapChain3->GetDesc(&sc_desc);
if (!initialized)
{
UINT bufferIndex = pSwapChain3->GetCurrentBackBufferIndex();
ID3D12Device* pDevice;
if (pSwapChain3->GetDevice(IID_PPV_ARGS(&pDevice)) != S_OK)
return;
bufferCount = sc_desc.BufferCount;
{
D3D12_DESCRIPTOR_HEAP_DESC desc = {};
desc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
desc.NumDescriptors = 1;
desc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
if (pDevice->CreateDescriptorHeap(&desc, IID_PPV_ARGS(&pSrvDescHeap)) != S_OK)
{
pDevice->Release();
pSwapChain3->Release();
return;
}
}
{
D3D12_DESCRIPTOR_HEAP_DESC desc = {};
desc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
desc.NumDescriptors = bufferCount;
desc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
desc.NodeMask = 1;
if (pDevice->CreateDescriptorHeap(&desc, IID_PPV_ARGS(&pRtvDescHeap)) != S_OK)
{
pDevice->Release();
pSwapChain3->Release();
pSrvDescHeap->Release();
return;
}
SIZE_T rtvDescriptorSize = pDevice->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
D3D12_CPU_DESCRIPTOR_HANDLE rtvHandle = pRtvDescHeap->GetCPUDescriptorHandleForHeapStart();
pMainRenderTargets = new D3D12_CPU_DESCRIPTOR_HANDLE[bufferCount];
pCmdAlloc = new ID3D12CommandAllocator * [bufferCount];
for (int i = 0; i < bufferCount; ++i)
{
pMainRenderTargets[i] = rtvHandle;
rtvHandle.ptr += rtvDescriptorSize;
}
}
for (UINT i = 0; i < sc_desc.BufferCount; ++i)
{
if (pDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&pCmdAlloc[i])) != S_OK)
{
pDevice->Release();
pSwapChain3->Release();
pSrvDescHeap->Release();
for (UINT j = 0; j < i; ++j)
{
pCmdAlloc[j]->Release();
}
pRtvDescHeap->Release();
delete[]pMainRenderTargets;
delete[]pCmdAlloc;
return;
}
}
if (pDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, pCmdAlloc[0], NULL, IID_PPV_ARGS(&pCmdList)) != S_OK ||
pCmdList->Close() != S_OK)
{
pDevice->Release();
pSwapChain3->Release();
pSrvDescHeap->Release();
for (UINT i = 0; i < bufferCount; ++i)
pCmdAlloc[i]->Release();
pRtvDescHeap->Release();
delete[]pMainRenderTargets;
delete[]pCmdAlloc;
return;
}
for (UINT i = 0; i < bufferCount; i++)
{
ID3D12Resource* pBackBuffer = NULL;
pSwapChain3->GetBuffer(i, IID_PPV_ARGS(&pBackBuffer));
pDevice->CreateRenderTargetView(pBackBuffer, NULL, pMainRenderTargets[i]);
}
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.IniFilename = NULL;
ImGui_ImplDX12_Init(pDevice, bufferCount, DXGI_FORMAT_R8G8B8A8_UNORM,
pSrvDescHeap->GetCPUDescriptorHandleForHeapStart(),
pSrvDescHeap->GetGPUDescriptorHandleForHeapStart());
get_steam_client()->steam_overlay->CreateFonts();
initialized = true;
pDevice->Release();
}
ImGui_ImplDX12_NewFrame();
Windows_Hook::Inst()->prepareForOverlay(sc_desc.OutputWindow);
ImGui::NewFrame();
get_steam_client()->steam_overlay->OverlayProc();
UINT bufferIndex = pSwapChain3->GetCurrentBackBufferIndex();
pCmdList->Reset(pCmdAlloc[bufferIndex], NULL);
pCmdList->OMSetRenderTargets(1, &pMainRenderTargets[bufferIndex], FALSE, NULL);
pCmdList->SetDescriptorHeaps(1, &pSrvDescHeap);
ImGui::Render();
ImGui_ImplDX12_RenderDrawData(ImGui::GetDrawData(), pCmdList);
pCmdList->Close();
pCmdQueue->ExecuteCommandLists(1, (ID3D12CommandList**)&pCmdList);
pSwapChain3->Release();
}
HRESULT STDMETHODCALLTYPE DX12_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
{
DX12_Hook::Inst()->prepareForOverlay(_this);
return (_this->*DX12_Hook::Inst()->Present)(SyncInterval, Flags);
}
HRESULT STDMETHODCALLTYPE DX12_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
{
DX12_Hook::Inst()->resetRenderState();
return (_this->*DX12_Hook::Inst()->ResizeTarget)(pNewTargetParameters);
}
HRESULT STDMETHODCALLTYPE DX12_Hook::MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags)
{
DX12_Hook::Inst()->resetRenderState();
return (_this->*DX12_Hook::Inst()->ResizeBuffers)(BufferCount, Width, Height, NewFormat, SwapChainFlags);
}
void STDMETHODCALLTYPE DX12_Hook::MyExecuteCommandLists(ID3D12CommandQueue *_this, UINT NumCommandLists, ID3D12CommandList* const* ppCommandLists)
{
DX12_Hook* me = DX12_Hook::Inst();
me->pCmdQueue = _this;
(_this->*DX12_Hook::Inst()->ExecuteCommandLists)(NumCommandLists, ppCommandLists);
}
DX12_Hook::DX12_Hook():
initialized(false),
pCmdQueue(nullptr),
bufferCount(0),
pMainRenderTargets(nullptr),
pCmdAlloc(nullptr),
pSrvDescHeap(nullptr),
pCmdList(nullptr),
pRtvDescHeap(nullptr),
hooked(false),
Present(nullptr),
ResizeBuffers(nullptr),
ResizeTarget(nullptr),
ExecuteCommandLists(nullptr)
{
_library = LoadLibrary(DLL_NAME);
PRINT_DEBUG("DX12 support is experimental, don't complain if it doesn't work as expected.\n");
}
DX12_Hook::~DX12_Hook()
{
PRINT_DEBUG("DX12 Hook removed\n");
if (initialized)
{
pSrvDescHeap->Release();
for (UINT i = 0; i < bufferCount; ++i)
pCmdAlloc[i]->Release();
pRtvDescHeap->Release();
delete[]pMainRenderTargets;
delete[]pCmdAlloc;
ImGui_ImplDX12_InvalidateDeviceObjects();
ImGui::DestroyContext();
initialized = false;
}
FreeLibrary(reinterpret_cast<HMODULE>(_library));
_inst = nullptr;
}
DX12_Hook* DX12_Hook::Inst()
{
if (_inst == nullptr)
_inst = new DX12_Hook();
return _inst;
}
const char* DX12_Hook::get_lib_name() const
{
return DLL_NAME;
}
void DX12_Hook::loadFunctions(ID3D12CommandQueue* pCommandQueue, IDXGISwapChain *pSwapChain)
{
void** vTable;
vTable = *reinterpret_cast<void***>(pCommandQueue);
#define LOAD_FUNC(X) (void*&)X = vTable[(int)ID3D12CommandQueueVTable::X]
LOAD_FUNC(ExecuteCommandLists);
#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
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