Sets the JPEG compression options for the current TWAIN session. This method lets the user set JPEG compression options for the current TWAIN session or reset the default JPEG compression options for the current TWAIN session, depending on the flag passed to the flag parameter.
public void SetJpegCompression(
TwainJpegCompression compression,
bool resetValues
)
Public Sub SetJpegCompression( _
ByVal compression As TwainJpegCompression, _
ByVal resetValues As Boolean _
)
public:
void SetJpegCompression(
TwainJpegCompression compression,
bool resetValues
)
compression
JPEG Compression data to be set
resetValues
Indicates the JPEG compression values to set
Depending upon the flag used, this method will either set JPEG compression options for the current TWAIN session, or restore the default JPEG compression options for the current TWAIN session. For more information, refer to Using JPEG Compression For A TWAIN Source.
using Leadtools;
using Leadtools.Twain;
public void SetJpegCompressionExample(IntPtr parent)
{
TwainSession session = new TwainSession();
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);
try
{
TwainJpegCompression myJpeg = session.GetJpegCompression(false);
TwainMemoryData[] data = new TwainMemoryData[1];
myJpeg.ColorScheme = TwainColorScheme.Gray;
myJpeg.SubSampling = 0x10001000;
myJpeg.ColorComponentCount = 1;
myJpeg.RestartFrequency = 0;
int[] quantMap = new int[1];
quantMap[0] = 0;
myJpeg.SetQuantizationMap(quantMap);
int[] haffmanMap = new int[1];
haffmanMap[0] = 0;
myJpeg.SetHuffmanMap(haffmanMap);
myJpeg.SetQuantizationTable(data);
myJpeg.SetHuffmanDC(data);
myJpeg.SetHuffmanAC(data);
session.SetJpegCompression(myJpeg, false);
MessageBox.Show("Set JPEG compression options is success");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
session.Shutdown();
}
Imports Leadtools
Imports Leadtools.Twain
Public Sub SetJpegCompressionExample(ByVal parent As IntPtr)
Dim session As TwainSession = New TwainSession()
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)
Try
Dim myJpeg As TwainJpegCompression = session.GetJpegCompression(False)
Dim data As TwainMemoryData() = New TwainMemoryData(0) {}
myJpeg.ColorScheme = TwainColorScheme.Gray
myJpeg.SubSampling = &H10001000
myJpeg.ColorComponentCount = 1
myJpeg.RestartFrequency = 0
Dim quantMap As Integer() = New Integer(0) {}
quantMap(0) = 0
myJpeg.SetQuantizationMap(quantMap)
Dim haffmanMap As Integer() = New Integer(0) {}
haffmanMap(0) = 0
myJpeg.SetHuffmanMap(haffmanMap)
myJpeg.SetQuantizationTable(data)
myJpeg.SetHuffmanDC(data)
myJpeg.SetHuffmanAC(data)
session.SetJpegCompression(myJpeg, False)
MessageBox.Show("Set JPEG compression options is success")
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
session.Shutdown()
End Sub
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