GetJpegCompression Method

Summary
Gets the current or default JPEG compression settings for the TWAIN session.
Syntax
C#
C++
public TwainJpegCompression GetJpegCompression( 
   bool defaultValues 
) 
vb[VB Syntax] 
Public Function GetJpegCompression( _ 
   ByVal _defaultValues_ As Boolean _ 
) As TwainJpegCompression 
public: 
TwainJpegCompression GetJpegCompression(  
   bool defaultValues 
)  

Parameters

defaultValues
Flag that indicates whether to get the current or the default compression settings.

Return Value

A TwainJpegCompression object that contains the specified TWAIN JPEG compression options.

Remarks

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.

Example
C#
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(); 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.5
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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Twain Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.