├── .gitattributes ├── .gitignore ├── CompositionSandbox.Native ├── CompositionSandbox.Native.vcxproj ├── CompositionSandbox.Native.vcxproj.filters ├── CrossProcessVisuals.h ├── dcomp.private.h ├── main.cpp └── packages.config ├── CompositionSandbox.sln ├── LICENSE.txt └── README.md /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). 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Use NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}. 149 | 150 | 151 | 152 | 153 | -------------------------------------------------------------------------------- /CompositionSandbox.Native/CompositionSandbox.Native.vcxproj.filters: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | {4FC737F1-C7A5-4376-A066-2A32D752A2FF} 6 | cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx 7 | 8 | 9 | {d4f58695-eb5a-4d52-928f-15bf36080fed} 10 | 11 | 12 | {b2ef5cc1-aace-4e96-a443-077706becae7} 13 | 14 | 15 | 16 | 17 | Source Files 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | Source Files\Experiments 26 | 27 | 28 | Source Files\Common 29 | 30 | 31 | -------------------------------------------------------------------------------- /CompositionSandbox.Native/CrossProcessVisuals.h: -------------------------------------------------------------------------------- 1 | #define WIN32_LEAN_AND_MEAN 2 | #include 3 | 4 | #include 5 | #include 6 | #include 7 | 8 | #include 9 | #include 10 | #include 11 | #include 12 | 13 | #include 14 | #include 15 | #include 16 | 17 | #include "dcomp.private.h" 18 | 19 | namespace WU = winrt::Windows::UI; 20 | namespace WF = winrt::Windows::Foundation; 21 | namespace WUC = winrt::Windows::UI::Composition; 22 | namespace AWUC = ABI::Windows::UI::Composition; 23 | namespace WUCD = winrt::Windows::UI::Composition::Desktop; 24 | namespace AWUCD = ABI::Windows::UI::Composition::Desktop; 25 | 26 | #define CDSSHAREDHANDLE 0x123987 27 | 28 | HINSTANCE hInst; 29 | HANDLE receivedHandle; 30 | HANDLE parentProccess; 31 | 32 | bool isSecondary = false; 33 | volatile bool handleReceived = false; 34 | 35 | WUC::ContainerVisual rootVisual{ nullptr }; 36 | 37 | ATOM RegisterWindowClass(HINSTANCE hInstance, const wchar_t* className); 38 | _Success_(return == TRUE) BOOL InitInstance(HINSTANCE hInstance, int nCmdShow, const wchar_t* className, const wchar_t* title, _Out_ HWND* hwnd); 39 | int RunMessageLoop(); 40 | winrt::Windows::System::DispatcherQueueController CreateDispatcherQueueController(); 41 | LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); 42 | 43 | int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow) 44 | { 45 | isSecondary = wcscmp(lpCmdLine, L"SecondaryProcess") == 0; 46 | 47 | const wchar_t* mainClassName = L"CompositionSandbox.Native.MainWindow"; 48 | const wchar_t* secondaryClassName = L"CompositionSandbox.Native.SecondaryWindow"; 49 | const wchar_t* className = isSecondary ? secondaryClassName : mainClassName; 50 | const wchar_t* windowTitle = isSecondary ? L"Secondary Window" : L"Main Window"; 51 | 52 | RegisterWindowClass(hInstance, className); 53 | 54 | HWND hwnd; 55 | if (!InitInstance(hInstance, nCmdShow, className, windowTitle, &hwnd)) 56 | return FALSE; 57 | 58 | winrt::init_apartment(winrt::apartment_type::single_threaded); 59 | auto controller = CreateDispatcherQueueController(); 60 | 61 | WUC::Compositor compositor; 62 | WUCD::DesktopWindowTarget target{ nullptr }; 63 | 64 | auto interop = compositor.try_as(); 65 | auto partner = compositor.try_as(); 66 | 67 | if (!interop || !partner) 68 | { 69 | // Note: See the TODO in dcomp.private.h 70 | MessageBox(hwnd, L"Make sure you are running on 19041+ and if so please open an issue", L"Unsupported Windows build", NULL); 71 | ExitProcess(0); 72 | } 73 | 74 | interop->CreateDesktopWindowTarget(hwnd, true, reinterpret_cast(winrt::put_abi(target))); 75 | 76 | if (!isSecondary) 77 | { 78 | WUC::Visual visual{ nullptr }; 79 | partner->CreateSharedVisual(reinterpret_cast(winrt::put_abi(visual))); 80 | 81 | HANDLE sharedHandle; 82 | partner->OpenSharedResourceHandle(reinterpret_cast(winrt::get_abi(visual.as())), &sharedHandle); 83 | 84 | STARTUPINFOA cif; 85 | ZeroMemory(&cif, sizeof(cif)); 86 | cif.cb = sizeof(cif); 87 | 88 | PROCESS_INFORMATION pi; 89 | ZeroMemory(&pi, sizeof(pi)); 90 | 91 | std::string cmd = GetCommandLineA(); 92 | cmd += " SecondaryProcess"; 93 | CreateProcessA(NULL, (LPSTR)cmd.c_str(), NULL, NULL, FALSE, 0, NULL, NULL, &cif, &pi); 94 | 95 | target.Root(visual); 96 | visual.RelativeSizeAdjustment({ 1, 1 }); 97 | 98 | HANDLE secondaryHandle; 99 | DuplicateHandle(GetCurrentProcess(), sharedHandle, pi.hProcess, &secondaryHandle, NULL, FALSE, DUPLICATE_SAME_ACCESS); 100 | 101 | COPYDATASTRUCT CDS; 102 | CDS.cbData = sizeof(HANDLE); 103 | CDS.dwData = CDSSHAREDHANDLE; 104 | CDS.lpData = &secondaryHandle; 105 | 106 | // Wait for the secondary process to spawn its window 107 | Sleep(500); 108 | 109 | HWND secondaryHwnd = FindWindowW(secondaryClassName, NULL); 110 | SendMessage(secondaryHwnd, WM_COPYDATA, (WPARAM)(HWND)hwnd, (LPARAM)(LPVOID)&CDS); 111 | 112 | auto retVal = RunMessageLoop(); 113 | 114 | CloseHandle(pi.hThread); 115 | TerminateProcess(pi.hProcess, 0); 116 | 117 | CloseHandle(sharedHandle); 118 | CloseHandle(secondaryHandle); 119 | 120 | return retVal; 121 | } 122 | else 123 | { 124 | winrt::com_ptr visualTarget; 125 | 126 | MSG msg; 127 | while (GetMessage(&msg, nullptr, 0, 0)) 128 | { 129 | TranslateMessage(&msg); 130 | DispatchMessage(&msg); 131 | 132 | if (handleReceived) 133 | { 134 | handleReceived = false; 135 | 136 | partner->OpenSharedTargetFromHandle(receivedHandle, visualTarget.put()); 137 | 138 | rootVisual = compositor.CreateContainerVisual(); 139 | 140 | WUC::SpriteVisual backgroundVisual = compositor.CreateSpriteVisual(); 141 | backgroundVisual.Brush(compositor.CreateColorBrush(WU::Colors::MediumPurple())); 142 | backgroundVisual.RelativeSizeAdjustment({ 1, 1 }); 143 | rootVisual.Children().InsertAtBottom(backgroundVisual); 144 | 145 | WUC::SpriteVisual boxVisual = compositor.CreateSpriteVisual(); 146 | boxVisual.Brush(compositor.CreateColorBrush(WU::Colors::White())); 147 | boxVisual.Size({ 50, 50 }); 148 | boxVisual.AnchorPoint({ 0.5f, 0.5f }); 149 | boxVisual.RelativeOffsetAdjustment({ 0.1f, 0.5f, 0 }); 150 | rootVisual.Children().InsertAtTop(boxVisual); 151 | 152 | WUC::Vector3KeyFrameAnimation anim = compositor.CreateVector3KeyFrameAnimation(); 153 | anim.InsertKeyFrame(0, { 0.1f, 0.5f, 0 }); 154 | anim.InsertKeyFrame(0.5f, { 0.9f, 0.5f, 0 }); 155 | anim.InsertKeyFrame(1, { 0.1f, 0.5f, 0 }); 156 | anim.IterationBehavior(WUC::AnimationIterationBehavior::Forever); 157 | anim.Duration(std::chrono::seconds(2)); 158 | boxVisual.StartAnimation(L"RelativeOffsetAdjustment", anim); 159 | 160 | target.Root(rootVisual); 161 | 162 | // Note: We are using a SpriteVisual with a CompositionVisualSurface brush instead of a RedirectVisual because 163 | // RedirectVisual is a bit buggy and stops rendering source parts outside of its destination rendering target rect 164 | 165 | WUC::SpriteVisual redirectVisual = compositor.CreateSpriteVisual(); 166 | WUC::CompositionVisualSurface visualSurface = compositor.CreateVisualSurface(); 167 | WUC::CompositionSurfaceBrush surfaceBrush = compositor.CreateSurfaceBrush(visualSurface); 168 | 169 | visualSurface.SourceVisual(rootVisual); 170 | surfaceBrush.Stretch(WUC::CompositionStretch::None); 171 | redirectVisual.Brush(surfaceBrush); 172 | 173 | // Set size of roots 174 | // 175 | // We cannot use RelativeSizeAdjustment for roots because this property depends on render target size 176 | // when used on root-level, in this case it's the HWND client size since we are using an HWND render target, 177 | // so if a window gets minimized RelativeSizeAdjustment would evaluate Size to zero, 178 | // which would make the root visual size zero in the other window/process so nothing would render there, 179 | // so we manually set root sizes to the maximized window size to prevent that and keep the rendering 180 | // working fine on both windows/processes even if one of them is minimized 181 | 182 | RECT wrct; 183 | GetClientRect(hwnd, &wrct); 184 | rootVisual.Size({ (float)(wrct.right - wrct.left), (float)(wrct.bottom - wrct.top) }); 185 | 186 | // Synchronize redirect visual & visual surface sizes with root visual size 187 | 188 | WUC::ExpressionAnimation sizeAnim = compositor.CreateExpressionAnimation(L"rootVisual.Size"); 189 | sizeAnim.SetReferenceParameter(L"rootVisual", rootVisual); 190 | 191 | redirectVisual.StartAnimation(L"Size", sizeAnim); 192 | visualSurface.StartAnimation(L"SourceSize", sizeAnim); 193 | 194 | visualTarget->SetRoot(reinterpret_cast(winrt::get_abi(redirectVisual))); 195 | } 196 | } 197 | 198 | CloseHandle(receivedHandle); 199 | 200 | if (parentProccess) 201 | TerminateProcess(parentProccess, 0); 202 | 203 | return (int)msg.wParam; 204 | } 205 | } 206 | 207 | inline int RunMessageLoop() 208 | { 209 | MSG msg; 210 | while (GetMessage(&msg, nullptr, 0, 0)) 211 | { 212 | TranslateMessage(&msg); 213 | DispatchMessage(&msg); 214 | } 215 | 216 | return (int)msg.wParam; 217 | } 218 | 219 | winrt::Windows::System::DispatcherQueueController CreateDispatcherQueueController() 220 | { 221 | DispatcherQueueOptions options 222 | { 223 | sizeof(DispatcherQueueOptions), 224 | DQTYPE_THREAD_CURRENT, 225 | DQTAT_COM_STA 226 | }; 227 | 228 | winrt::Windows::System::DispatcherQueueController controller{ nullptr }; 229 | winrt::check_hresult(CreateDispatcherQueueController(options, reinterpret_cast(winrt::put_abi(controller)))); 230 | return controller; 231 | } 232 | 233 | ATOM RegisterWindowClass(HINSTANCE hInstance, const wchar_t* className) 234 | { 235 | WNDCLASSEXW wcex; 236 | 237 | wcex.cbSize = sizeof(WNDCLASSEX); 238 | 239 | wcex.style = CS_HREDRAW | CS_VREDRAW; 240 | wcex.lpfnWndProc = WndProc; 241 | wcex.cbClsExtra = 0; 242 | wcex.cbWndExtra = 0; 243 | wcex.hInstance = hInstance; 244 | wcex.hIcon = LoadIcon((HINSTANCE)NULL, IDI_APPLICATION); 245 | wcex.hCursor = LoadCursor(nullptr, IDC_ARROW); 246 | wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); 247 | wcex.lpszClassName = className; 248 | wcex.lpszMenuName = NULL; 249 | wcex.hIconSm = LoadIcon((HINSTANCE)NULL, IDI_APPLICATION); 250 | 251 | return RegisterClassExW(&wcex); 252 | } 253 | 254 | _Success_(return == TRUE) 255 | BOOL InitInstance(HINSTANCE hInstance, int nCmdShow, const wchar_t* className, const wchar_t* title, _Out_ HWND* hwnd) 256 | { 257 | hInst = hInstance; 258 | HWND hWnd = CreateWindowEx(WS_EX_NOREDIRECTIONBITMAP, className, title, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr); 259 | 260 | if (!hWnd) 261 | return FALSE; 262 | 263 | ShowWindow(hWnd, nCmdShow); 264 | UpdateWindow(hWnd); 265 | 266 | *hwnd = hWnd; 267 | 268 | return TRUE; 269 | } 270 | 271 | LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 272 | { 273 | switch (message) 274 | { 275 | case WM_COPYDATA: 276 | { 277 | auto CDS = (PCOPYDATASTRUCT)lParam; 278 | if (isSecondary && CDS->dwData == CDSSHAREDHANDLE) 279 | { 280 | receivedHandle = *(HANDLE*)CDS->lpData; 281 | handleReceived = true; 282 | 283 | DWORD pid; 284 | GetWindowThreadProcessId((HWND)wParam, &pid); 285 | parentProccess = OpenProcess(PROCESS_TERMINATE, FALSE, pid); 286 | } 287 | break; 288 | } 289 | case WM_SIZE: 290 | { 291 | if (rootVisual && wParam != SIZE_MINIMIZED) 292 | { 293 | float width = (float)LOWORD(lParam); 294 | float height = (float)HIWORD(lParam); 295 | 296 | rootVisual.Size({ width, height }); 297 | } 298 | break; 299 | } 300 | case WM_DESTROY: 301 | PostQuitMessage(0); 302 | break; 303 | default: 304 | return DefWindowProc(hWnd, message, wParam, lParam); 305 | } 306 | return 0; 307 | } -------------------------------------------------------------------------------- /CompositionSandbox.Native/dcomp.private.h: -------------------------------------------------------------------------------- 1 | #pragma once 2 | 3 | #define WIN32_LEAN_AND_MEAN 4 | #include 5 | 6 | #include 7 | #include 8 | 9 | DECLARE_INTERFACE_IID_(IVisualTargetPartner, IUnknown, "DBA1813C-60C5-4A42-A4D2-3380CDDCE8A1") 10 | { 11 | IFACEMETHOD(GetRoot)(ABI::Windows::UI::Composition::IVisual** rootVisual) PURE; 12 | IFACEMETHOD(SetRoot)(ABI::Windows::UI::Composition::IVisual* rootVisual) PURE; 13 | }; 14 | 15 | // 19041+ 16 | DECLARE_INTERFACE_IID_(ICompositorPartner, IUnknown, "9CBD9312-070D-4588-9BF3-BBF528CF3E84") 17 | { 18 | IFACEMETHOD(CreateCursorVisual)(unsigned __int64, IUnknown** cursorVisual) PURE; 19 | IFACEMETHOD(CreateSharedTarget)(IVisualTargetPartner** target) PURE; 20 | IFACEMETHOD(CreateSharedVisual)(ABI::Windows::UI::Composition::IVisual** visual) PURE; 21 | IFACEMETHOD(HintSize)(unsigned int w, unsigned int h) PURE; 22 | IFACEMETHOD(OfferSurfaceResources)() PURE; 23 | IFACEMETHOD(OpenSharedResourceHandle)(ABI::Windows::UI::Composition::ICompositionObject* object, HANDLE* handle) PURE; 24 | IFACEMETHOD(OpenSharedTargetFromHandle)(HANDLE handle, IVisualTargetPartner** target) PURE; 25 | IFACEMETHOD(OpenSharedTargetFromVisual)(ABI::Windows::UI::Composition::IVisual* visual, IVisualTargetPartner** target) PURE; 26 | IFACEMETHOD(OpenSharedVisualFromHandle)(HANDLE handle, ABI::Windows::UI::Composition::IVisual** visual) PURE; 27 | IFACEMETHOD(OpenSharedVisualFromTarget)(IVisualTargetPartner* target, ABI::Windows::UI::Composition::IVisual** visual) PURE; 28 | IFACEMETHOD(OpenSharedVisualReferenceFromHandle)(HANDLE handle, IInspectable** visualRef) PURE; 29 | }; 30 | 31 | // TODO: add interfaces for 15063-18890 -------------------------------------------------------------------------------- /CompositionSandbox.Native/main.cpp: -------------------------------------------------------------------------------- 1 | // Experiments list 2 | #define EXPERIMENT_NONE 0 3 | #define EXPERIMENT_CROSS_PROCESS_VISUALS 1 4 | 5 | // Experiment to be compiled 6 | #define EXPERIMENT EXPERIMENT_CROSS_PROCESS_VISUALS 7 | 8 | #if EXPERIMENT == EXPERIMENT_CROSS_PROCESS_VISUALS 9 | #include "CrossProcessVisuals.h" 10 | #endif -------------------------------------------------------------------------------- /CompositionSandbox.Native/packages.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | -------------------------------------------------------------------------------- /CompositionSandbox.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.8.34511.84 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "CompositionSandbox.Native", "CompositionSandbox.Native\CompositionSandbox.Native.vcxproj", "{FA667235-C50F-4419-85BD-00C0186AD94F}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|x64 = Debug|x64 11 | Debug|x86 = Debug|x86 12 | Release|x64 = Release|x64 13 | Release|x86 = Release|x86 14 | EndGlobalSection 15 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 16 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Debug|x64.ActiveCfg = Debug|x64 17 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Debug|x64.Build.0 = Debug|x64 18 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Debug|x86.ActiveCfg = Debug|Win32 19 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Debug|x86.Build.0 = Debug|Win32 20 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Release|x64.ActiveCfg = Release|x64 21 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Release|x64.Build.0 = Release|x64 22 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Release|x86.ActiveCfg = Release|Win32 23 | {FA667235-C50F-4419-85BD-00C0186AD94F}.Release|x86.Build.0 = Release|Win32 24 | EndGlobalSection 25 | GlobalSection(SolutionProperties) = preSolution 26 | HideSolutionNode = FALSE 27 | EndGlobalSection 28 | GlobalSection(ExtensibilityGlobals) = postSolution 29 | SolutionGuid = {B5DA9B8E-AD29-4D91-88F4-FE745AB19DC0} 30 | EndGlobalSection 31 | EndGlobal 32 | -------------------------------------------------------------------------------- /LICENSE.txt: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) [year] [fullname] 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Composition Sandbox 2 | 3 | Collection of various Windows Composition API Experiments 4 | 5 | > [!CAUTION] 6 | > These experiments are just for fun, it's highly discouraged to use any of the experiments shown here in production code, they aren't well-tested and make use of internal/private APIs that can change at any time. 7 | 8 | ## Experiments 9 | 10 | ### [Cross Process Visuals](https://github.com/ahmed605/CompositionSandbox/blob/master/CompositionSandbox.Native/CrossProcessVisuals.h) 11 | 12 | This experiment showcases a Composition Visual created in a process (the "main" one) then sent to another process (the "secondary" one) via a Window Message to be used as render target in that secondary process while same visual used as root for an HWND render target in the main process. 13 | 14 | See also: [Cross Process Visuals With InteractionTracker](https://github.com/BreeceW/InteractionTrackerCrossProcessVisuals) 15 | 16 | https://github.com/ahmed605/CompositionSandbox/assets/34550324/b9d613f7-96e8-457d-a4d7-f9180d65666b 17 | 18 | --------------------------------------------------------------------------------