ScanArea Property (SaneLocalDevice)
Gets or sets the scan area (in millimeters) of this SANE device.
This C#/VB.NET code shows how to acquire image area from SANE device.
''' <summary>
''' Acquires image area from SANE device.
''' </summary>
Public Sub AcquireImageAreaFromSaneDevice()
' create SANE device manager
Using deviceManager As New Vintasoft.Sane.SaneLocalDeviceManager()
' open SANE device manager
deviceManager.Open()
' get count of SANE devices
Dim deviceCount As Integer = deviceManager.Devices.Count
If deviceCount = 0 Then
System.Console.WriteLine("Devices are not found.")
Return
End If
' select the first SANE device
Dim device As Vintasoft.Sane.SaneLocalDevice = deviceManager.Devices(0)
' open SANE device
device.Open()
' get the default scan area
Dim defaultScanArea As VintasoftRectF = device.ScanArea
' set new scan area
device.ScanArea = New VintasoftRectF(0, 0, defaultScanArea.Width, defaultScanArea.Height / 2)
Dim acquiredImage As Vintasoft.Sane.SaneAcquiredImage
Do
Try
' acquire image from SANE device
acquiredImage = device.AcquireImageSync()
' if image is received
If acquiredImage IsNot Nothing Then
System.Console.WriteLine("Image is acquired.")
Else
' if image is not received
System.Console.WriteLine("Scan is completed.")
Exit Try
End If
Catch ex As System.Exception
System.Console.WriteLine(String.Format("Scan is failed: {0}", ex.Message))
Exit Try
End Try
' while device has more images to scan
Loop While device.HasMoreImagesToScan
' close SANE device
device.Close()
' close SANE device manager
deviceManager.Close()
End Using
System.Console.ReadLine()
End Sub
/// <summary>
/// Acquires image area from SANE device.
/// </summary>
public void AcquireImageAreaFromSaneDevice()
{
// create SANE device manager
using (Vintasoft.Sane.SaneLocalDeviceManager deviceManager = new Vintasoft.Sane.SaneLocalDeviceManager())
{
// open SANE device manager
deviceManager.Open();
// get count of SANE devices
int deviceCount = deviceManager.Devices.Count;
if (deviceCount == 0)
{
System.Console.WriteLine("Devices are not found.");
return;
}
// select the first SANE device
Vintasoft.Sane.SaneLocalDevice device = deviceManager.Devices[0];
// open SANE device
device.Open();
// get the default scan area
VintasoftRectF defaultScanArea = device.ScanArea;
// set new scan area
device.ScanArea = new VintasoftRectF(0, 0, defaultScanArea.Width, defaultScanArea.Height / 2);
Vintasoft.Sane.SaneAcquiredImage acquiredImage;
do
{
try
{
// acquire image from SANE device
acquiredImage = device.AcquireImageSync();
// if image is received
if (acquiredImage != null)
{
System.Console.WriteLine("Image is acquired.");
}
// if image is not received
else
{
System.Console.WriteLine("Scan is completed.");
break;
}
}
catch (System.Exception ex)
{
System.Console.WriteLine(string.Format("Scan is failed: {0}", ex.Message));
break;
}
}
// while device has more images to scan
while (device.HasMoreImagesToScan);
// close SANE device
device.Close();
// close SANE device manager
deviceManager.Close();
}
System.Console.ReadLine();
}
Target Platforms: .NET 8, .NET 7; .NET 6