在D3D里面如何使用Render to Texture？

ChinaShrimp 2004-10-20 05:31:25

我知道在OpenGL可以生成一个float类型的pbuffer，然后将可以渲染到里面去，但是操作起来很复杂。我想D3D里肯定也能实现Render to Texture,而且据说用起来很方便，我想请问一下如何使用？另外我还想问的就是在D3D里面能否设置pbuffer中的数据类型(例如浮点型)？多谢！

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潘李亮 2004-10-24

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SetRenderTarget．把一个纹理当作Surface．

seagate 2004-10-21

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IDirect3DDevice9有个函数是SetRenderTarget。它能实现你要的功能。它有个参数是IDirect3DSurface9，可以作为存放的buffer。数据类型是创建这个surface时自己定的。

lly20000 2004-10-21

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在D3D中可以通过d3dxsavetofile来保存当前的截图

D3DXSaveSurfaceToFile(file_name, D3DXIFF_JPG, frontbuf, NULL, NULL);

D3D11_RenderTo2DTexture

对ID3D11Texture2D实现颜色填充(对D3D11实现IDirect3DDevice9::ColorFill效果) 运行环境VS2019 编Rlease x86版本

D3D11初始化，一个最简单的D3D11应用程序。学习D3D的开始。

时分法，真正的三维编程，场景渲染 #pragma warning(disable: 4995) #include #include #include // Scenes 场景 #include "Scene.h" #include "StanfordBunnyScene.h" // Include nvstereo, but only for Dx10. #define NO_STEREO_D3D9 #include "nvstereo.h" // Text rendering ID3DX10Font* gFont10 = NULL; ID3DX10Sprite* gSprite10 = NULL; CDXUTTextHelper* gTxtHelper = NULL; // our global vector of all our scenes. // Make this global because it's easier to work with DXUT this way const int cNoActiveScene = -1; std::vector gScenes; int gActiveScene = cNoActiveScene; // A little UI stuff GUI图形用户界面 //CDXUTDialog这个类负责纪录一个对话框的所有属性以及它上面的所有控件信息 //CDXUTDialogResourceManager，这个类保存了所有注册过的对话框链表，以及这些对话框共享的资源 //CDXUTElement 这个类保存了需要渲染的元素信息，经常会在渲染函数中用到 //CGrowableArray< TYPE >类可动态增长的链表类。 CDXUTDialogResourceManager gDialogResourceManager; CDXUTDialog gUI; // Our parameters for the stereo parameters texture.纹理立体参数 nv::stereo::ParamTextureManagerD3D10* gStereoTexMgr = NULL; ID3D10Texture2D* gStereoParamTexture = NULL; ID3D10ShaderResourceView* gStereoParamTextureRV = NULL; // Support going back and forth between fullscreen and windowed mode #define IDC_TOGGLEFULLSCREEN 1 #define IDC_MENU 2 // ------------------------------------------------------------------------------------------------ void ClearRenderTargets(ID3D10Device* d3d10) { // Clearing every frame is a good practice for SLI. By clearing surfaces, you indicate to the // driver that information from the previous frame is not needed by the other GPU(s) involved // in rendering. float ClearColor[4] = { 0.0, 0.0, 0.5, 0.0 }; ID3D10RenderTargetView* pRTV = DXUTGetD3D10RenderTargetView(); d3d10->ClearRenderTargetView(pRTV, ClearColor); ID3D10DepthStencilView* pDSV = DXUTGetD3D10DepthStencilView(); d3d10->ClearDepthStencilView(pDSV, D3D10_CLEAR_DEPTH, 1.0, 0); } // ------------------------------------------------------------------------------------------------ void RenderWorld(ID3D10Device* d3d10, double fTime, float fElapsedTime) { // Give the active scene a shot at rendering the world. gScenes[gActiveScene]->Render(d3d10); } // ------------------------------------------------------------------------------------------------ void RenderText() { // Render common text, then give the active scene a chance to display text information // about itself. gTxtHelper->Begin(); gTxtHelper->SetInsertionPos(8, 8); gTxtHelper->SetForegroundColor(D3DXCOLOR(1.0f, 1.0f, 0.0f, 1.0f)); gTxtHelper->DrawTextLine(L""); gTxtHelper->DrawTextLine(L""); gTxtHelper->DrawTextLine(L""); gTxtHelper->DrawTextLine(DXUTGetFrameStats(true)); gTxtHelper->DrawTextLine(DXUTGetDeviceStats()); bool stereoActive = gStereoTexMgr->IsStereoActive(); if (stereoActive) { gTxtHelper->DrawTextLine(L"Stereo Active"); } else { gTxtHelper->SetForegroundColor(D3DXCOLOR(1.0f, 0.2f, 0.2f, 1.0f)); gTxtHelper->DrawTextLine(L"Stereo is currently disabled--you should see no differences between techniques."); gTxtHelper->SetForegroundColor(D3DXCOLOR(1.0f, 0.5f, 0.0f, 1.0f)); } gScenes[gActiveScene]->RenderText(gTxtHelper, stereoActive); gTxtHelper->End(); } // ------------------------------------------------------------------------------------------------ void RenderCursor(ID3D10Device* d3d10) { // Cursor rendering is handled by the active scene. // Cursors need a bit of stereo love, so the scenes handle that. gScenes[gActiveScene]->RenderCursor(d3d10); } // ------------------------------------------------------------------------------------------------ void RenderHUD(ID3D10Device* d3d10, double fTime, float fElapsedTime) { RenderText(); gUI.OnRender( fElapsedTime ); // Render the cursor last for the obvious reason that we want it to appear above everything // else RenderCursor(d3d10); } // ------------------------------------------------------------------------------------------------ HRESULT CreateStereoParamTextureAndView(ID3D10Device* d3d10) { // This function creates a texture that is suitable to be stereoized by the driver. // Note that the parameters primarily come from nvstereo.h using nv::stereo::ParamTextureManagerD3D10; HRESULT hr = D3D_OK; D3D10_TEXTURE2D_DESC desc; desc.Width = ParamTextureManagerD3D10::Parms::StereoTexWidth; desc.Height = ParamTextureManagerD3D10::Parms::StereoTexHeight; desc.MipLevels = 1; desc.ArraySize = 1; desc.Format = ParamTextureManagerD3D10::Parms::StereoTexFormat; desc.SampleDesc.Count = 1; desc.SampleDesc.Quality = 0; desc.Usage = D3D10_USAGE_DYNAMIC; desc.BindFlags = D3D10_BIND_SHADER_RESOURCE; desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE; desc.MiscFlags = 0; V_RETURN(d3d10->CreateTexture2D(&desc;, NULL, &gStereoParamTexture;)); // Since we need to bind the texture to a shader input, we also need a resource view. D3D10_SHADER_RESOURCE_VIEW_DESC descRV; descRV.Format = desc.Format; descRV.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE2D; descRV.Texture2D.MipLevels = 1; descRV.Texture2D.MostDetailedMip = 0; descRV.Texture2DArray.MostDetailedMip = 0; descRV.Texture2DArray.MipLevels = 1; descRV.Texture2DArray.FirstArraySlice = 0; descRV.Texture2DArray.ArraySize = desc.ArraySize; V_RETURN(d3d10->CreateShaderResourceView(gStereoParamTexture, &descRV;, &gStereoParamTextureRV;)); return hr; } // ------------------------------------------------------------------------------------------------ bool CALLBACK IsD3D10DeviceAcceptable(UINT Adapter, UINT Output, D3D10_DRIVER_TYPE DeviceType, DXGI_FORMAT BackBufferFormat, bool bWindowed, void* pUserContext) { // Only accept hardware devices return DeviceType == D3D10_DRIVER_TYPE_HARDWARE; } // ------------------------------------------------------------------------------------------------ HRESULT CALLBACK OnD3D10CreateDevice(ID3D10Device* d3d10, const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext) { HRESULT hr = D3D_OK; V_RETURN(gDialogResourceManager.OnD3D10CreateDevice(d3d10)); V_RETURN(D3DX10CreateFont(d3d10, 15, 0, FW_BOLD, 1, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, L"Verdana", &gFont10;)); V_RETURN(D3DX10CreateSprite(d3d10, 512, &gSprite10;)); gTxtHelper = new CDXUTTextHelper(NULL, NULL, gFont10, gSprite10, 15); // Create our stereo parameter texture V_RETURN(CreateStereoParamTextureAndView(d3d10)); // Initialize the stereo texture manager. Note that the StereoTextureManager was created // before the device. This is important, because NvAPI_Stereo_CreateConfigurationProfileRegistryKey // must be called BEFORE device creation. gStereoTexMgr->Init(d3d10); // Give each of our scenes a chance to load their resources. for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { (*it)->SetStereoParamRV(gStereoParamTextureRV); V_RETURN((*it)->LoadResources(d3d10)); } return hr; } // ------------------------------------------------------------------------------------------------ void CALLBACK OnD3D10DestroyDevice(void* pUserContext) { // Clean everything up. gDialogResourceManager.OnD3D10DestroyDevice(); for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { (*it)->UnloadResources(); } SAFE_RELEASE(gStereoParamTextureRV); SAFE_RELEASE(gStereoParamTexture); SAFE_DELETE(gStereoTexMgr); SAFE_RELEASE(gFont10); SAFE_RELEASE(gSprite10); SAFE_DELETE(gTxtHelper); } // ------------------------------------------------------------------------------------------------ HRESULT CALLBACK OnD3D10ResizedSwapChain(ID3D10Device* d3d10, IDXGISwapChain *pSwapChain, const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext) { HRESULT hr = D3D_OK; V_RETURN(gDialogResourceManager.OnD3D10ResizedSwapChain(d3d10, pBackBufferSurfaceDesc)); // All scenes need a chance to handle the resize. for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { (*it)->OnD3D10ResizedSwapChain(d3d10, pSwapChain, pBackBufferSurfaceDesc); } gUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 ); gUI.SetSize( 170, 170 ); return hr; } // ------------------------------------------------------------------------------------------------ void CALLBACK Render(ID3D10Device* d3d10, double fTime, float fElapsedTime, void* pUserContext) { // First, we update our stereo texture gStereoTexMgr->UpdateStereoTexture(d3d10, gStereoParamTexture, false); // Then, we tell the scene what the current convergence depth is. Cursor rendering // uses this information to cause the cursor to draw at screen depth if the cursor // isn't currently over an object in the scene. gScenes[gActiveScene]->SetConvergenceDepth(gStereoTexMgr->GetConvergenceDepth()); // Then, clear our render targets, render the world and finish with the hud. ClearRenderTargets(d3d10); RenderWorld(d3d10, fTime, fElapsedTime); RenderHUD(d3d10, fTime, fElapsedTime); } // ------------------------------------------------------------------------------------------------ void CALLBACK OnD3D10ReleasingSwapChain(void* pUserContext) { gDialogResourceManager.OnD3D10ReleasingSwapChain(); } // ------------------------------------------------------------------------------------------------ bool CALLBACK ModifyDeviceSettings(DXUTDeviceSettings* pDeviceSettings, void* pUserContext) { if (pDeviceSettings->ver == DXUT_D3D10_DEVICE) { #if _DEBUG // Set debug if debugging. In debug, run aliased mode because // otherwise DXUT deletes a target while bound, causing many, many // spew messages. pDeviceSettings->d3d10.CreateFlags |= D3D10_CREATE_DEVICE_DEBUG; pDeviceSettings->d3d10.sd.SampleDesc.Count = 1; #else // I like AA, so turn it on here. pDeviceSettings->d3d10.sd.SampleDesc.Count = 4; #endif pDeviceSettings->d3d10.sd.SampleDesc.Quality = 0; } return true; } // ------------------------------------------------------------------------------------------------ LRESULT CALLBACK MsgProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, bool* pbNoFurtherProcessing, void* pUserContext) { // WM_MOUSEMOVE needs to make it to the active scene to draw the cursor in the right place. *pbNoFurtherProcessing = gDialogResourceManager.MsgProc(hWnd, uMsg, wParam, lParam); if( *pbNoFurtherProcessing && uMsg != WM_MOUSEMOVE) return 0; // Again, make sure that WM_MOUSEMOVE makes it to the active scene, otherwise the mouse will // freeze when it's over our GUI elements, making it significantly less useful. *pbNoFurtherProcessing = gUI.MsgProc(hWnd, uMsg, wParam, lParam); if( *pbNoFurtherProcessing && uMsg != WM_MOUSEMOVE) return 0; // Pass all remaining windows messages to camera so it can respond to user input if (gActiveScene != cNoActiveScene) { return gScenes[gActiveScene]->HandleMessages(hWnd, uMsg, wParam, lParam); } return 0; } // ------------------------------------------------------------------------------------------------ void CALLBACK Update(double fTime, float fElapsedTime, void* pUserContext) { // Only the active scene gets the update gScenes[gActiveScene]->Update(fTime, fElapsedTime); } // ------------------------------------------------------------------------------------------------ void CALLBACK OnGUIEvent(UINT nEvent, int nControlID, CDXUTControl* pControl, void* pUserContext) { switch( nControlID ) { case IDC_TOGGLEFULLSCREEN: DXUTToggleFullScreen(); break; case IDC_MENU: default: // All other messages need to be given to all scenes, in case they need to handle // them. for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { (*it)->OnGUIEvent(nEvent, nControlID, pControl, pUserContext); } } } // ------------------------------------------------------------------------------------------------ void InitUI() //UI User Interface 用户界面 { gUI.Init(&gDialogResourceManager;); int y = 10; gUI.SetCallback(OnGUIEvent); gUI.AddButton( IDC_TOGGLEFULLSCREEN, L"Toggle full screen", 35, y, 125, 22 ); gUI.AddButton(IDC_MENU,L"Menu",-1024,y,125,22); y += 24; int startId = IDC_TOGGLEFULLSCREEN + 1; for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { (*it)->InitUI(gUI, 35, y, startId); } } // ------------------------------------------------------------------------------------------------ // ------------------------------------------------------------------------------------------------ // ------------------------------------------------------------------------------------------------ INT WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, INT) { HRESULT hr; V_RETURN(DXUTSetMediaSearchPath(L"..\\Source\\StereoIssues")); // Set Direct3D 10 callbacks. This sample won't work with Dx9, so don't bother setting any of // those. 设置 Direct3D 10回调信号 DXUTSetCallbackD3D10DeviceAcceptable(IsD3D10DeviceAcceptable); DXUTSetCallbackD3D10DeviceCreated(OnD3D10CreateDevice); DXUTSetCallbackD3D10SwapChainResized(OnD3D10ResizedSwapChain); DXUTSetCallbackD3D10FrameRender(Render); DXUTSetCallbackD3D10SwapChainReleasing(OnD3D10ReleasingSwapChain); DXUTSetCallbackD3D10DeviceDestroyed(OnD3D10DestroyDevice); // Set the generic callback functions 设置通用的回调函数 DXUTSetCallbackDeviceChanging(ModifyDeviceSettings); DXUTSetCallbackMsgProc(MsgProc); DXUTSetCallbackFrameMove(Update); // We'll deal with our own cursor in fullscreen mode. DXUTSetCursorSettings(false, false); // Needs to be called before any other NVAPI functions, so before device creation is fine. NvAPI_Initialize(); // ParamTextureManager must be created before the device to give our settings-loading code a chance to fire. gStereoTexMgr = new nv::stereo::ParamTextureManagerD3D10; gScenes.push_back(new StanfordBunnyScene); gActiveScene = 0; InitUI(); // UI用户界面 // Initialize DXUT and create the desired Win32 window and Direct3D device for the application DXUTInit(true, true); // Stereo is a Vista/Win7 feature for Dx9 and Dx10. One of the restrictions is that it only works // in fullscreen mode, but it's useful to debug and place breakpoints in windowed mode. // In any event, there is a button in the sample to toggle to fullscreen if needed, this only // controls the starting state of the app. bool windowed = false; #ifdef _DEBUG windowed = true; #endif DXUTCreateWindow(L"Stereo Issues"); DXUTCreateDevice(windowed); // Start the render loop 开始DXUT主要渲染循环 DXUTMainLoop(); int retval = DXUTGetExitCode(); // Clean everything up DXUTShutdown(retval); // We no longer have an active scene. gActiveScene = cNoActiveScene; // No memory leaks! for (std::vector::iterator it = gScenes.begin(); it != gScenes.end(); ++it) { SAFE_DELETE(*it); } return retval; }

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