Gets the current or default JPEG compression settings for the TWAIN session.
public TwainJpegCompression GetJpegCompression(
bool defaultValues
)
Public Function GetJpegCompression( _
ByVal defaultValues As Boolean _
) As TwainJpegCompression
public:
TwainJpegCompression GetJpegCompression(
bool defaultValues
)
defaultValues
Flag that indicates whether to get the current or the default compression settings.
A TwainJpegCompression object that contains the specified TWAIN JPEG compression options.
This method will get the current or default TWAIN JPEG compression settings, depending on the flag passed to the flag parameter. For more information, refer to Using JPEG Compression For A TWAIN Source.
using Leadtools;
using Leadtools.Twain;
public void GetJpegCompressionExample(IntPtr parent)
{
TwainSession session = new TwainSession();
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);
string jpegdata;
try
{
TwainJpegCompression twainJpeg = session.GetJpegCompression(false);
int[] quantMap = twainJpeg.GetQuantizationMap();
int[] haffmanMap = twainJpeg.GetHuffmanMap();
TwainMemoryData[] quantTable = twainJpeg.GetQuantizationTable();
TwainMemoryData[] haffmanDC = twainJpeg.GetHuffmanDC();
TwainMemoryData[] haffmanAC = twainJpeg.GetHuffmanAC();
jpegdata = String.Format(@"Color Space = {0}\nQuantMap = {1}\nGetHuffmanMap = {2}\nGetQuantTable Flags = {3}\nGetQuantTable Length = {4}\nGetQuantTable Data = {5}\nGetHuffmanDC Flags = {6}\nGetHuffmanDC Data
= {7}\nGetHuffmanAC Flags = {8}\nGetHuffmanAC Data = {9}\n",
twainJpeg.ColorScheme,
quantMap[0],
haffmanMap[0],
quantTable[0].Flags,
quantTable[0].Length,
quantTable[0].Data,
haffmanDC[0].Flags,
haffmanDC[0].Data,
haffmanAC[0].Flags,
haffmanAC[0].Data);
MessageBox.Show(jpegdata);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
session.Shutdown();
}
Imports Leadtools
Imports Leadtools.Twain
Public Sub GetJpegCompressionExample(ByVal parent As IntPtr)
Dim session As TwainSession = New TwainSession()
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)
Dim jpegdata As String
Try
Dim twainJpeg As TwainJpegCompression = session.GetJpegCompression(False)
Dim quantMap As Integer() = twainJpeg.GetQuantizationMap()
Dim haffmanMap As Integer() = twainJpeg.GetHuffmanMap()
Dim quantTable As TwainMemoryData() = twainJpeg.GetQuantizationTable()
Dim haffmanDC As TwainMemoryData() = twainJpeg.GetHuffmanDC()
Dim haffmanAC As TwainMemoryData() = twainJpeg.GetHuffmanAC()
jpegdata = String.Format("Color Space = {0}" & Constants.vbLf & "QuantMap = {1}" & Constants.vbLf & "GetHuffmanMap = {2}" & Constants.vbLf & "GetQuantTable Flags = {3}" & Constants.vbLf & "GetQuantTable Length = {4}" &
Constants.vbLf & "GetQuantTable Data = {5}" & Constants.vbLf & "GetHuffmanDC Flags = {6}" & Constants.vbLf & "GetHuffmanDC Data = {7}" & Constants.vbLf & "GetHuffmanAC Flags = {8}" & Constants.vbLf & "GetHuffmanAC Data = {9}" &
Constants.vbLf, twainJpeg.ColorScheme, quantMap(0), haffmanMap(0), quantTable(0).Flags, quantTable(0).Length, quantTable(0).Data, haffmanDC(0).Flags, haffmanDC(0).Data, haffmanAC(0).Flags, haffmanAC(0).Data)
MessageBox.Show(jpegdata)
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
session.Shutdown()
End Sub
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