├── .gitattributes ├── .github └── workflows │ └── main.yml ├── .gitignore ├── LICENSE ├── README.md ├── Sdcb.ScreenCapture.sln ├── Sdcb.ScreenCapture ├── GrabResult.cs ├── LockedFrame.cs ├── OutputDuplicationExtensions.cs ├── ScreenCapture.cs ├── Sdcb.ScreenCapture.csproj └── linqpad-samples │ └── demo.linq └── deploy-test-nuget.linq /.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). Diff markers may cause the following 21 | # file extensions to fail to load in VS. An alternative would be to treat 22 | # these files as binary and thus will always conflict and require user 23 | # intervention with every merge. To do so, just uncomment the entries below 24 | ############################################################################### 25 | #*.sln merge=binary 26 | #*.csproj merge=binary 27 | #*.vbproj merge=binary 28 | #*.vcxproj merge=binary 29 | #*.vcproj merge=binary 30 | #*.dbproj merge=binary 31 | #*.fsproj merge=binary 32 | #*.lsproj merge=binary 33 | #*.wixproj merge=binary 34 | #*.modelproj merge=binary 35 | #*.sqlproj merge=binary 36 | #*.wwaproj merge=binary 37 | 38 | ############################################################################### 39 | # behavior for image files 40 | # 41 | # image files are treated as binary by default. 42 | ############################################################################### 43 | #*.jpg binary 44 | #*.png binary 45 | #*.gif binary 46 | 47 | ############################################################################### 48 | # diff behavior for common document formats 49 | # 50 | # Convert binary document formats to text before diffing them. This feature 51 | # is only available from the command line. Turn it on by uncommenting the 52 | # entries below. 53 | ############################################################################### 54 | #*.doc diff=astextplain 55 | #*.DOC diff=astextplain 56 | #*.docx diff=astextplain 57 | #*.DOCX diff=astextplain 58 | #*.dot diff=astextplain 59 | #*.DOT diff=astextplain 60 | #*.pdf diff=astextplain 61 | #*.PDF diff=astextplain 62 | #*.rtf diff=astextplain 63 | #*.RTF diff=astextplain 64 | -------------------------------------------------------------------------------- /.github/workflows/main.yml: -------------------------------------------------------------------------------- 1 | name: main 2 | on: 3 | push: 4 | branches: [master] 5 | pull_request: 6 | branches: [master] 7 | workflow_dispatch: 8 | 9 | jobs: 10 | ubuntu-latest: 11 | runs-on: ubuntu-latest 12 | steps: 13 | - uses: actions/checkout@v2 14 | - name: Build 15 | run: | 16 | dotnet build -c Release 17 | dotnet pack -c Release --include-symbols --include-source 18 | - name: Test 19 | run: | 20 | dotnet test -c Release 21 | - 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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 | # Sdcb.ScreenCapture [![QQ](https://img.shields.io/badge/QQ_Group-579060605-52B6EF?style=social&logo=tencent-qq&logoColor=000&logoWidth=20)](https://jq.qq.com/?_wv=1027&k=K4fBqpyQ) 2 | 3 | DXGI based screen capture, with no dependency of Bitmap, **zero-copy**, raw output only. 4 | 5 | Suitable for high performance/real time screen capture/video recording. 6 | 7 | ## Usage 8 | ```csharp 9 | // with LINQPad6 & OpenCVSharp4 10 | var dc = new DumpContainer().Dump(); 11 | foreach (LockedFrame frame in ScreenCapture.CaptureScreenFrames(screenId: 0)) 12 | { 13 | using Mat mat = new Mat(frame.Height, frame.Width, MatType.CV_8UC4, frame.DataPointer); 14 | dc.Content = Util.Image(mat.ToBytes(".jpg")); 15 | Thread.Sleep(200); 16 | } 17 | ``` 18 | -------------------------------------------------------------------------------- /Sdcb.ScreenCapture.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.3.32901.215 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sdcb.ScreenCapture", "Sdcb.ScreenCapture\Sdcb.ScreenCapture.csproj", "{ED3DB0FC-130A-4B12-800A-1623F98C1886}" 7 | EndProject 8 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{24279C8D-C106-4B6B-AB57-E41D7E7BDBC1}" 9 | ProjectSection(SolutionItems) = preProject 10 | deploy-test-nuget.linq = deploy-test-nuget.linq 11 | README.md = README.md 12 | EndProjectSection 13 | EndProject 14 | Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "github-workflows", "github-workflows", "{DEF2F88D-D01D-4445-A9AE-C4DCD082DE20}" 15 | ProjectSection(SolutionItems) = preProject 16 | .github\workflows\main.yml = .github\workflows\main.yml 17 | EndProjectSection 18 | EndProject 19 | Global 20 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 21 | Debug|Any CPU = Debug|Any CPU 22 | Release|Any CPU = Release|Any CPU 23 | EndGlobalSection 24 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 25 | {ED3DB0FC-130A-4B12-800A-1623F98C1886}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 26 | {ED3DB0FC-130A-4B12-800A-1623F98C1886}.Debug|Any CPU.Build.0 = Debug|Any CPU 27 | {ED3DB0FC-130A-4B12-800A-1623F98C1886}.Release|Any CPU.ActiveCfg = Release|Any CPU 28 | {ED3DB0FC-130A-4B12-800A-1623F98C1886}.Release|Any CPU.Build.0 = Release|Any CPU 29 | EndGlobalSection 30 | GlobalSection(SolutionProperties) = preSolution 31 | HideSolutionNode = FALSE 32 | EndGlobalSection 33 | GlobalSection(ExtensibilityGlobals) = postSolution 34 | SolutionGuid = {E944D3ED-93C2-4F49-B991-F5B7BE922AB0} 35 | EndGlobalSection 36 | EndGlobal 37 | -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/GrabResult.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using Vortice.Direct3D11; 3 | using Vortice.DXGI; 4 | 5 | namespace Sdcb 6 | { 7 | internal record GrabResult : IDisposable 8 | { 9 | public OutduplFrameInfo FrameInfo { get; } 10 | public IDXGIResource Resource { get; } 11 | 12 | public ID3D11Texture2D AsTexture2D() => Resource.QueryInterface(); 13 | 14 | public void Dispose() 15 | { 16 | Resource?.Dispose(); 17 | } 18 | 19 | public GrabResult(OutduplFrameInfo frameInfo, IDXGIResource resource) 20 | { 21 | FrameInfo = frameInfo; 22 | Resource = resource; 23 | } 24 | } 25 | } -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/LockedFrame.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections; 3 | using System.Collections.Generic; 4 | using System.Linq; 5 | using System.Runtime.InteropServices; 6 | using Vortice.Direct3D11; 7 | 8 | namespace Sdcb 9 | { 10 | public record struct LockedBgraFrame(IntPtr DataPointer, int Length, int RowPitch) 11 | { 12 | public int Width => RowPitch / BytePerPixel; 13 | public int Height => Length / RowPitch; 14 | 15 | public const int BytePerPixel = 4; 16 | 17 | public static explicit operator LockedBgraFrame(MappedSubresource box) => new LockedBgraFrame(box.DataPointer, box.DepthPitch, box.RowPitch); 18 | 19 | public byte[] ToArray() 20 | { 21 | byte[] data = new byte[Length]; 22 | Marshal.Copy(DataPointer, data, 0, Length); 23 | return data; 24 | } 25 | 26 | public ManagedBgraFrame ToManaged() => new ManagedBgraFrame(ToArray(), Length, RowPitch); 27 | } 28 | 29 | public record struct ManagedBgraFrame(byte[] Data, int Length, int RowPitch) 30 | { 31 | public int Width => RowPitch / BytePerPixel; 32 | public int Height => Length / RowPitch; 33 | 34 | public const int BytePerPixel = 4; 35 | } 36 | 37 | public static class BgraFrameExtensions 38 | { 39 | public static IEnumerable ToManaged(this IEnumerable frames) => frames.Select(x => x.ToManaged()); 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/OutputDuplicationExtensions.cs: -------------------------------------------------------------------------------- 1 | using SharpGen.Runtime; 2 | using Vortice.DXGI; 3 | 4 | namespace Sdcb 5 | { 6 | internal static class OutputDuplicationExtensions 7 | { 8 | public static GrabResult? Grab(this IDXGIOutputDuplication duplication, int timeoutInMilliseconds = int.MaxValue) 9 | { 10 | Result result = duplication.AcquireNextFrame(timeoutInMilliseconds, 11 | out OutduplFrameInfo frameInfo, 12 | out IDXGIResource desktopResource); 13 | if (result.Failure) return null; 14 | return new GrabResult(frameInfo, desktopResource); 15 | } 16 | } 17 | } -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/ScreenCapture.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Diagnostics; 4 | using System.Threading; 5 | using Vortice.Direct3D; 6 | using Vortice.Direct3D11; 7 | using Vortice.DXGI; 8 | using Vortice.Mathematics; 9 | 10 | namespace Sdcb 11 | { 12 | public static class ScreenCapture 13 | { 14 | public static RectI GetScreenSize(int screenId, int adapterId = 0) 15 | { 16 | using IDXGIFactory1 factory = DXGI.CreateDXGIFactory1(); 17 | factory.EnumAdapters1(adapterId, out IDXGIAdapter1 _adapter).CheckError(); 18 | using IDXGIAdapter1 adapter = _adapter; 19 | adapter.EnumOutputs(screenId, out IDXGIOutput _output); 20 | using IDXGIOutput output = _output; 21 | 22 | return output.Description.DesktopCoordinates; 23 | } 24 | 25 | public static IEnumerable CaptureScreenFrames(int screenId, int adapterId = 0, int timeoutMs = 20, CancellationToken cancellationToken = default) 26 | { 27 | using IDXGIFactory1 factory = DXGI.CreateDXGIFactory1(); 28 | factory.EnumAdapters1(adapterId, out IDXGIAdapter1 _adapter).CheckError(); 29 | using IDXGIAdapter1 adapter = _adapter; 30 | D3D11.D3D11CreateDevice(adapter, DriverType.Unknown, DeviceCreationFlags.None, new[] { FeatureLevel.Level_11_1, FeatureLevel.Level_11_0 }, out ID3D11Device? _device).CheckError(); 31 | using ID3D11Device device = _device!; 32 | adapter.EnumOutputs(screenId, out IDXGIOutput _output); 33 | using IDXGIOutput output = _output; 34 | using IDXGIOutput1 output1 = output.QueryInterface(); 35 | 36 | RectI bounds = output1.Description.DesktopCoordinates; 37 | Texture2DDescription textureDesc = new() 38 | { 39 | CPUAccessFlags = CpuAccessFlags.Read, 40 | BindFlags = BindFlags.None, 41 | Format = Format.B8G8R8A8_UNorm, 42 | Width = bounds.Width, 43 | Height = bounds.Height, 44 | MiscFlags = ResourceOptionFlags.None, 45 | MipLevels = 1, 46 | ArraySize = 1, 47 | SampleDescription = { Count = 1, Quality = 0 }, 48 | Usage = ResourceUsage.Staging, 49 | }; 50 | using IDXGIOutputDuplication duplication = output1.DuplicateOutput(device); 51 | while (!cancellationToken.IsCancellationRequested) 52 | { 53 | using GrabResult? frame = duplication.Grab(timeoutMs); 54 | if (frame != null && frame.Resource != null && !cancellationToken.IsCancellationRequested) 55 | { 56 | using ID3D11Texture2D currentFrame = device.CreateTexture2D(textureDesc); 57 | using (ID3D11Texture2D rawTexture2d = frame.AsTexture2D()) 58 | { 59 | device.ImmediateContext.CopyResource(currentFrame, rawTexture2d); 60 | } 61 | MappedSubresource dataBox = device.ImmediateContext.Map(currentFrame, 0); 62 | yield return (LockedBgraFrame)dataBox; 63 | duplication.ReleaseFrame(); 64 | } 65 | } 66 | } 67 | 68 | public static IEnumerable CaptureScreenFrames(int screenId, double fps, int adapterId = 0, CancellationToken cancellationToken = default) 69 | { 70 | double frameIntervalMs = 1000.0 / fps; 71 | 72 | using IDXGIFactory1 factory = DXGI.CreateDXGIFactory1(); 73 | factory.EnumAdapters1(adapterId, out IDXGIAdapter1 _adapter).CheckError(); 74 | using IDXGIAdapter1 adapter = _adapter; 75 | D3D11.D3D11CreateDevice(adapter, DriverType.Unknown, DeviceCreationFlags.None, new[] { FeatureLevel.Level_11_1, FeatureLevel.Level_11_0 }, out ID3D11Device? _device).CheckError(); 76 | using ID3D11Device device = _device!; 77 | adapter.EnumOutputs(screenId, out IDXGIOutput _output); 78 | using IDXGIOutput output = _output; 79 | using IDXGIOutput1 output1 = output.QueryInterface(); 80 | 81 | RectI bounds = output1.Description.DesktopCoordinates; 82 | Texture2DDescription textureDesc = new() 83 | { 84 | CPUAccessFlags = CpuAccessFlags.Read, 85 | BindFlags = BindFlags.None, 86 | Format = Format.B8G8R8A8_UNorm, 87 | Width = bounds.Width, 88 | Height = bounds.Height, 89 | MiscFlags = ResourceOptionFlags.None, 90 | MipLevels = 1, 91 | ArraySize = 1, 92 | SampleDescription = { Count = 1, Quality = 0 }, 93 | Usage = ResourceUsage.Staging, 94 | }; 95 | 96 | using IDXGIOutputDuplication duplication = output1.DuplicateOutput(device); 97 | 98 | ID3D11Texture2D? lastFrame = default; 99 | try 100 | { 101 | MappedSubresource lastDataBox = default; 102 | double sleepFlag = 0; 103 | while (!cancellationToken.IsCancellationRequested) 104 | { 105 | var sw = Stopwatch.StartNew(); 106 | using GrabResult? frame = duplication.Grab(Math.Max(1, (int)(frameIntervalMs - 10))); 107 | 108 | if (cancellationToken.IsCancellationRequested) break; 109 | 110 | if (frame != null && frame.Resource != null) 111 | { 112 | ID3D11Texture2D currentFrame = device.CreateTexture2D(textureDesc); 113 | using (ID3D11Texture2D rawTexture2d = frame.AsTexture2D()) 114 | { 115 | device.ImmediateContext.CopyResource(currentFrame, rawTexture2d); 116 | } 117 | MappedSubresource dataBox = device.ImmediateContext.Map(currentFrame, 0); 118 | try 119 | { 120 | yield return (LockedBgraFrame)dataBox; 121 | } 122 | finally 123 | { 124 | duplication.ReleaseFrame(); 125 | } 126 | 127 | lastFrame?.Dispose(); 128 | lastFrame = currentFrame; 129 | lastDataBox = dataBox; 130 | } 131 | else 132 | { 133 | yield return (LockedBgraFrame)lastDataBox; 134 | } 135 | sleepFlag += frameIntervalMs - sw.Elapsed.TotalMilliseconds; 136 | sw.Restart(); 137 | if (sleepFlag > 15.625) 138 | { 139 | int durationToSleep = (int)(sleepFlag - Math.IEEERemainder(sleepFlag, 15.625)); 140 | Thread.Sleep(durationToSleep); 141 | sleepFlag -= sw.Elapsed.TotalMilliseconds; 142 | } 143 | } 144 | } 145 | finally 146 | { 147 | lastFrame?.Dispose(); 148 | } 149 | } 150 | } 151 | } -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/Sdcb.ScreenCapture.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | netstandard2.0 5 | 10.0 6 | true 7 | sdcb 8 | DXGI based screen capture, with no dependency of Bitmap, zero-copy, raw output only. 9 | Suitable for high performance/real time screen capture/video recording. 10 | 1.0.0 11 | https://github.com/sdcb/Sdcb.ScreenCapture 12 | https://github.com/sdcb/Sdcb.ScreenCapture 13 | git 14 | sdcb 15 | linqpad-samples dxgi sdcb 16 | enable 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | -------------------------------------------------------------------------------- /Sdcb.ScreenCapture/linqpad-samples/demo.linq: -------------------------------------------------------------------------------- 1 | 2 | OpenCvSharp4 3 | OpenCvSharp4.runtime.win 4 | Sdcb.ScreenCapture 5 | OpenCvSharp 6 | Sdcb 7 | Vortice.DXGI 8 | Vortice.Direct3D11 9 | Vortice.Mathematics 10 | SharpGen.Runtime 11 | Vortice.Direct3D 12 | 13 | 14 | var dc = new DumpContainer().Dump(); 15 | 16 | foreach (LockedBgraFrame frame in ScreenCapture.CaptureScreenFrames(screenId: 0)) 17 | { 18 | using Mat mat = new Mat(frame.Height, frame.Width, MatType.CV_8UC4, frame.DataPointer); 19 | dc.Content = Util.Image(mat.ToBytes(".png"), Util.ScaleMode.Unscaled); 20 | Thread.Sleep(200); 21 | } -------------------------------------------------------------------------------- /deploy-test-nuget.linq: -------------------------------------------------------------------------------- 1 | 2 | 3 | Environment.CurrentDirectory = Path.GetDirectoryName(Util.CurrentQueryPath); 4 | Encoding.RegisterProvider(CodePagesEncodingProvider.Instance); 5 | Encoding encoding = Encoding.GetEncoding(936); 6 | 7 | string projFile = @".\Sdcb.ScreenCapture\Sdcb.ScreenCapture.csproj"; 8 | string nugetVersion = IncrementBuildVersion(projFile); 9 | Util.Cmd("dotnet", @$"build {projFile} -c Release", encoding); 10 | string progetApiKey = Util.GetPassword("proget-api-key"); 11 | string progetApiUrl = Util.GetPassword("proget-api-test"); 12 | 13 | string nugetPath = @$".\Sdcb.ScreenCapture\bin\Release\Sdcb.ScreenCapture.{nugetVersion}.nupkg"; 14 | Util.Cmd($@"nuget", @$"push {nugetPath} {progetApiKey} -Source {progetApiUrl}", encoding); 15 | 16 | string IncrementBuildVersion(string projFile) 17 | { 18 | string allText = File.ReadAllText(projFile); 19 | XDocument xml = XDocument.Parse(allText); 20 | XElement versionSuffixNode = xml.XPathSelectElement(@"/Project/PropertyGroup/VersionSuffix"); 21 | XElement versionPrefixNode = xml.XPathSelectElement(@"/Project/PropertyGroup/VersionPrefix"); 22 | 23 | string versionPrefix = (versionPrefixNode.FirstNode as XText).Value; 24 | string versionSuffix = (versionSuffixNode.FirstNode as XText).Value; 25 | int buildNumber = int.Parse(versionSuffix.Split('.')[1]); 26 | int newBuildNumber = buildNumber + 1; 27 | string newVersionSuffix = "preview." + newBuildNumber; 28 | 29 | versionSuffixNode.ReplaceNodes(newVersionSuffix); 30 | 31 | File.WriteAllText(projFile, allText.Replace(versionSuffix, newVersionSuffix)); 32 | 33 | return versionPrefix + "-" + newVersionSuffix; 34 | } 35 | 36 | string KeepBuildVersion(string projFile) 37 | { 38 | string allText = File.ReadAllText(projFile); 39 | XDocument xml = XDocument.Parse(allText); 40 | XElement versionSuffixNode = xml.XPathSelectElement(@"/Project/PropertyGroup/VersionSuffix"); 41 | XElement versionPrefixNode = xml.XPathSelectElement(@"/Project/PropertyGroup/VersionPrefix"); 42 | 43 | string versionPrefix = (versionPrefixNode.FirstNode as XText).Value; 44 | string versionSuffix = (versionSuffixNode.FirstNode as XText).Value; 45 | int buildNumber = int.Parse(versionSuffix.Split('.')[1]); 46 | 47 | return versionPrefix + "-preview." + buildNumber; 48 | } --------------------------------------------------------------------------------