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ReadLoadResolutions(String) Method
See Also 
Leadtools.Codecs Namespace > RasterCodecs Class > ReadLoadResolutions Method : ReadLoadResolutions(String) Method



fileName
A System.String containing the name of the file to query.
fileName
A System.String containing the name of the file to query.
Examines a file to determine which resolutions it contains.

Syntax

Visual Basic (Declaration) 
Overloads Public Function ReadLoadResolutions( _
   ByVal fileName As String _
) As LeadSize()
Visual Basic (Usage)Copy Code
Dim instance As RasterCodecs
Dim fileName As String
Dim value() As LeadSize
 
value = instance.ReadLoadResolutions(fileName)
C# 
public LeadSize[] ReadLoadResolutions( 
   string fileName
)
C++/CLI 
public:
array<LeadSize>^ ReadLoadResolutions( 
   String^ fileName
) 

Parameters

fileName
A System.String containing the name of the file to query.

Return Value

A Leadtools.LeadSize structure containing the available resolutions.

Example

This example shows how many physical resolutions are available, selects the smallest one, then loads the file.

Visual BasicCopy Code
Private Sub ReadLoadResolutionsExample(ByVal jbigFileName As String)
   Dim codecs As RasterCodecs = New RasterCodecs()
   ' Get the number of resolutions (sizes) available in this file
   Dim resolution As LeadSize() = codecs.ReadLoadResolutions(jbigFileName)
   If resolution.Length > 0 Then
      Console.WriteLine("{0} resolutions available", resolution.Length)
      Dim i As Integer = 0
      Do While i < resolution.Length
         Console.WriteLine("{0} by {1}", resolution(i).Width, resolution(i).Height)
         i += 1
      Loop

      ' Set the size to load, the smallest size in this case */
      codecs.Options.Jpeg2000.Load.J2kResolution = resolution(0)

      ' Get the info about the image to show its original size
      Dim info As CodecsImageInfo = codecs.GetInformation(jbigFileName, False)
      Console.WriteLine("Size of image according to GetInformation is {0} by {1}", info.Width, info.Height)

      ' Load the image, keeping the bits per pixel of the file
      Dim image As RasterImage = codecs.Load(jbigFileName)
      Console.WriteLine("Size of image loaded is {0} by {1}", image.Width, image.Height)

      image.Dispose()
   Else
      Console.WriteLine("No resolutions found")
   End If

   ' Clean up
   codecs.Dispose()
End Sub
C#Copy Code
void ReadLoadResolutionsExample(string jbigFileName)
{
   RasterCodecs codecs = new RasterCodecs();
   // Get the number of resolutions (sizes) available in this file
   LeadSize[] resolution = codecs.ReadLoadResolutions(jbigFileName);
   if(resolution.Length > 0)
   {
      Console.WriteLine("{0} resolutions available", resolution.Length);
      for(int i = 0; i < resolution.Length; i++)
         Console.WriteLine("{0} by {1}", resolution[i].Width, resolution[i].Height);

      // Set the size to load, the smallest size in this case */
      codecs.Options.Jpeg2000.Load.J2kResolution = resolution[0];

      // Get the info in of the image to show its original size
      CodecsImageInfo info = codecs.GetInformation(jbigFileName, false);
      Console.WriteLine("Size of image according to GetInformation is {0} by {1}", info.Width, info.Height);

      // Load the image, keeping the bits per pixel of the file
      RasterImage image = codecs.Load(jbigFileName);
      Console.WriteLine("Size of image loaded is {0} by {1}", image.Width, image.Height);

      image.Dispose();
   }
   else
      Console.WriteLine("No resolutions found");

   // Clean up
   codecs.Dispose();
}
SilverlightCSharpCopy Code
public void ReadLoadResolutionsExample(Stream inStreamJbig)
{
   RasterCodecs codecs = new RasterCodecs();
   // Get the number of resolutions (sizes) available in this file
   LeadSize[] resolution = codecs.ReadLoadResolutions(inStreamJbig);
   if(resolution.Length > 0)
   {
      Debug.WriteLine("{0} resolutions available", resolution.Length);
      for(int i = 0; i < resolution.Length; i++)
         Debug.WriteLine("{0} by {1}", resolution[i].Width, resolution[i].Height);

      // Set the size to load, the smallest size in this case */
      codecs.Options.Jpeg2000.Load.J2kResolution = resolution[0];

      // Get the info in of the image to show its original size
      CodecsImageInfo info = codecs.GetInformation(inStreamJbig, false);
      Debug.WriteLine("Size of image according to GetInformation is {0} by {1}", info.Width, info.Height);

      // Load the image, keeping the bits per pixel of the file
      RasterImage image = codecs.Load(inStreamJbig);
      Debug.WriteLine("Size of image loaded is {0} by {1}", image.Width, image.Height);

      image.Dispose();
   }
   else
      Debug.WriteLine("No resolutions found");
}
SilverlightVBCopy Code
Public Sub ReadLoadResolutionsExample(ByVal inStreamJbig As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   ' Get the number of resolutions (sizes) available in this file
   Dim resolution As LeadSize() = codecs.ReadLoadResolutions(inStreamJbig)
   If resolution.Length > 0 Then
      Debug.WriteLine("{0} resolutions available", resolution.Length)
      Dim i As Integer = 0
      Do While i < resolution.Length
         Debug.WriteLine("{0} by {1}", resolution(i).Width, resolution(i).Height)
         i += 1
      Loop

      ' Set the size to load, the smallest size in this case */
      codecs.Options.Jpeg2000.Load.J2kResolution = resolution(0)

      ' Get the info in of the image to show its original size
      Dim info As CodecsImageInfo = codecs.GetInformation(inStreamJbig, False)
      Debug.WriteLine("Size of image according to GetInformation is {0} by {1}", info.Width, info.Height)

      ' Load the image, keeping the bits per pixel of the file
      Dim image As RasterImage = codecs.Load(inStreamJbig)
      Debug.WriteLine("Size of image loaded is {0} by {1}", image.Width, image.Height)

      image.Dispose()
   Else
      Debug.WriteLine("No resolutions found")
   End If
End Sub

Remarks

A FlashPix, PhotoCD, ECW, JPEG 2000 or JBIG/JBIG2 file can contain more than one copy of the same image, each at a different physical resolution (width and height in pixels).

After you get the available resolutions, you can use any of the following to specify the one to be loaded:

For more information, refer to Implementing JBIG Features.

Requirements

Target Platforms: Silverlight, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also