Captures a device independent bitmap.
public virtual IntPtr CaptureDIB()
Public Overridable Function CaptureDIB() As IntPtr
public:
virtual IntPtr CaptureDIB();
A System.IntPtr to the device independent bitmap.
If the method succeeds, the caller must free the returned HDIB pointer by calling the Marshal.FreeHGlobal method. If the method fails, an error is raised. For more information, refer to the Error Codes. Note: Internally this method calls StartCapture with the capture mode set to CaptureMode.Still. It then waits for the current capture delay setting specified by CaptureStillDelay before capturing the still DIB. Finally, it stops the session by calling StopCapture.
using Leadtools;
using Leadtools.MediaFoundation;
using LeadtoolsMediaFoundationExamples.Fixtures;
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CaptureDIBExample()
{
// reference the capture control
CaptureCtrl capturectrl = _form.CaptureCtrl;
try
{
// set the video capture device, use your capture device name here
if (capturectrl.VideoDevices["Logitech"] == null)
throw new Exception("No Logitech video device available");
capturectrl.VideoDevices["Logitech"].Selected = true;
// let's set a delay of 1 second to insure that some capture devices
// have time to adjust their gain
capturectrl.CaptureStillDelay = 1000;
// capture device independent bitmap
IntPtr dib = capturectrl.CaptureDIB();
_result = (dib != null);
//free allocated global memory
Marshal.FreeHGlobal(dib);
}
catch (COMException)
{
_result = false;
}
catch (Exception)
{
_result = false;
}
}
Imports Leadtools
Imports Leadtools.MediaFoundation
Imports LeadtoolsMediaFoundationExamples.Fixtures
Public _result As Boolean = False
Public _form As New CaptureCtrlForm()
Public Sub CaptureDIBExample()
' reference the capture control
Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
Try
' set the video capture device, use your capture device name here
If capturectrl.VideoDevices("Logitech") Is Nothing Then
Throw New Exception("No Logitech video device available")
End If
capturectrl.VideoDevices("Logitech").Selected = True
' let's set a delay of 1 second to insure that some capture devices
' have time to adjust their gain
capturectrl.CaptureStillDelay = 1000
' capture device independent bitmap
Dim dib As IntPtr = capturectrl.CaptureDIB()
_result = (dib <> Nothing)
'free allocated global memory
Marshal.FreeHGlobal(dib)
Catch generatedExceptionName As COMException
_result = False
Catch generatedExceptionName As Exception
_result = False
End Try
End Sub
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document