Qt5窗口显示D3D11的程序示例

#include "d3drenderwidget.h" #include <QTimer> D3DRenderWidget::D3DRenderWidget(QWidget *parent) : QWidget(parent), m_d3dDriverType(D3D_DRIVER_TYPE_HARDWARE), m_enable4xMsaa(false), m_4xMsaaQuality(0), m_d3dDevice(0), m_d3dImmediateContext(0), m_swapChain(0), m_depthStencilBuffer(0), m_renderTargetView(0), m_depthStencilView(0) { setAttribute(Qt::WA_PaintOnScreen, true); setAttribute(Qt::WA_NativeWindow, true); QTimer* timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(update())); ZeroMemory(&m_screenViewport, sizeof(D3D11_VIEWPORT)); createDevice(); } D3DRenderWidget::~D3DRenderWidget() { safe_release(m_renderTargetView); safe_release(m_depthStencilView); safe_release(m_swapChain); safe_release(m_depthStencilBuffer); if (m_d3dImmediateContext) m_d3dImmediateContext->ClearState(); safe_release(m_d3dImmediateContext); safe_release(m_d3dDevice); } void D3DRenderWidget::resizeEvent(QResizeEvent *e) { d3dResize(); } void D3DRenderWidget::paintEvent(QPaintEvent *e) { d3dRender(); } bool D3DRenderWidget::createDevice() { HRESULT re; UINT createDeviceFlags = 0; #if defined(DEBUG) || defined(_DEBUG) createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG; #endif D3D_FEATURE_LEVEL featureLevel; HRESULT hr = D3D11CreateDevice( 0, m_d3dDriverType, 0, createDeviceFlags, 0, 0, D3D11_SDK_VERSION, &m_d3dDevice, &featureLevel, &m_d3dImmediateContext); if (FAILED(hr)) { MessageBox(0, L"D3D11CreateDevice Failed.", 0, 0); return false; } if (featureLevel != D3D_FEATURE_LEVEL_11_0) { MessageBox(0, L"Direct3D Feature Level 11 unsupported.", 0, 0); return false; } re = m_d3dDevice->CheckMultisampleQualityLevels( DXGI_FORMAT_R8G8B8A8_UNORM, 4, &m_4xMsaaQuality); if (FAILED(re)) return false; assert(m_4xMsaaQuality > 0); DXGI_SWAP_CHAIN_DESC sd; sd.BufferDesc.Width = width(); sd.BufferDesc.Height = height(); sd.BufferDesc.RefreshRate.Numerator = 60; sd.BufferDesc.RefreshRate.Denominator = 1; sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM; sd.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED; sd.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED; if (m_enable4xMsaa) { sd.SampleDesc.Count = 4; sd.SampleDesc.Quality = m_4xMsaaQuality - 1; } else { sd.SampleDesc.Count = 1; sd.SampleDesc.Quality = 0; } sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; sd.BufferCount = 1; sd.OutputWindow = (HWND)winId(); sd.Windowed = true; sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD; sd.Flags = 0; IDXGIDevice* dxgiDevice = 0; re = m_d3dDevice->QueryInterface(__uuidof(IDXGIDevice), (void**)&dxgiDevice); if (FAILED(re)) return false; IDXGIAdapter* dxgiAdapter = 0; re = dxgiDevice->GetParent(__uuidof(IDXGIAdapter), (void**)&dxgiAdapter); if (FAILED(re)) return false; IDXGIFactory* dxgiFactory = 0; re = dxgiAdapter->GetParent(__uuidof(IDXGIFactory), (void**)&dxgiFactory); if (FAILED(re)) return false; re = dxgiFactory->CreateSwapChain(m_d3dDevice, &sd, &m_swapChain); if (FAILED(re)) return false; safe_release(dxgiDevice); safe_release(dxgiAdapter); safe_release(dxgiFactory); return true; } void D3DRenderWidget::d3dRender() { static float blue[4] = {0.69f, 0.77f, 0.87f, 1.0f}; assert(m_d3dImmediateContext); assert(m_swapChain); m_d3dImmediateContext->ClearRenderTargetView(m_renderTargetView, &blue[0]); m_d3dImmediateContext->ClearDepthStencilView(m_depthStencilView, D3D11_CLEAR_DEPTH | D3D11_CLEAR_STENCIL, 1.0f, 0); m_swapChain->Present(0, 0); } void D3DRenderWidget::d3dResize() { assert(m_d3dImmediateContext); assert(m_d3dDevice); assert(m_swapChain); safe_release(m_renderTargetView); safe_release(m_depthStencilView); safe_release(m_depthStencilBuffer); m_swapChain->ResizeBuffers(1, width(), height(), DXGI_FORMAT_R8G8B8A8_UNORM, 0); ID3D11Texture2D* backBuffer; m_swapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), reinterpret_cast<void**>(&backBuffer)); m_d3dDevice->CreateRenderTargetView(backBuffer, 0, &m_renderTargetView); safe_release(backBuffer); D3D11_TEXTURE2D_DESC depthStencilDesc; depthStencilDesc.Width = width(); depthStencilDesc.Height = height(); depthStencilDesc.MipLevels = 1; depthStencilDesc.ArraySize = 1; depthStencilDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT; if (m_enable4xMsaa) { depthStencilDesc.SampleDesc.Count = 4; depthStencilDesc.SampleDesc.Quality = m_4xMsaaQuality - 1; } else { depthStencilDesc.SampleDesc.Count = 1; depthStencilDesc.SampleDesc.Quality = 0; } depthStencilDesc.Usage = D3D11_USAGE_DEFAULT; depthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL; depthStencilDesc.CPUAccessFlags = 0; depthStencilDesc.MiscFlags = 0; m_d3dDevice->CreateTexture2D(&depthStencilDesc, 0, &m_depthStencilBuffer); m_d3dDevice->CreateDepthStencilView(m_depthStencilBuffer, 0, &m_depthStencilView); m_d3dImmediateContext->OMSetRenderTargets(1, &m_renderTargetView, m_depthStencilView); m_screenViewport.TopLeftX = 0; m_screenViewport.TopLeftY = 0; m_screenViewport.Width = static_cast<float>(width()); m_screenViewport.Height = static_cast<float>(height()); m_screenViewport.MinDepth = 0.0f; m_screenViewport.MaxDepth = 1.0f; m_d3dImmediateContext->RSSetViewports(1, &m_screenViewport); }