Overloads Public Function Save( _
   ByVal stream As Stream, _
   ByVal offset As Long, _
   ByVal format As RasterImageFormat, _
   ByVal bitsPerPixel As Integer, _
   ByVal qualityFactor As Integer _
) As Long

Visual Basic (Usage)	Copy Code
Dim instance As RasterImageViewer Dim stream As Stream Dim offset As Long Dim format As RasterImageFormat Dim bitsPerPixel As Integer Dim qualityFactor As Integer Dim value As Long   value = instance.Save(stream, offset, format, bitsPerPixel, qualityFactor)

public long Save( 
   Stream stream,
   long offset,
   RasterImageFormat format,
   int bitsPerPixel,
   int qualityFactor
)

public:
long Save( 
   Stream^ stream,
   long offset,
   RasterImageFormat format,
   int bitsPerPixel,
   int qualityFactor
) 

Parameters

stream

A Stream where the image data will be saved.

offset

The offset within the specified stream, in which the saved image file will be embedded. For example, if you specify 5, then 5 bytes of other data will precede the embedded file.

format

The output file format. For valid values, refer to Summary of All Supported Image File Formats.

bitsPerPixel

Resulting file's pixel depth. Note that not all bits per pixel are available to all file formats. For valid values, refer to Summary of All Supported Image File Formats. If bitsPerPixel is 0, the image will be stored using the closest bits per pixel value supported by that format. For example, if a file format supports 1, 4, and 24 bits per pixel, and RasterImage.BitsPerPixel is 5, the file will be stored as a 24-bit image. Likewise, if RasterImage.BitsPerPixel is 2, the file will be stored as a 4-bit image.

qualityFactor

A quality factor to be used when saving the RasterImageViewer.Image to a stream.

Return Value

This example will save an image to a stream before loading it back.

Visual Basic

Copy Code

Public Sub RasterImageViewer_Save3(ByVal viewer As RasterImageViewer)     Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"     Dim destFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_SaveStream3.bin"     ' Load the source image     viewer.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1)     ' Create a memory stream     Dim ms As MemoryStream = New MemoryStream()     ' Save this image to the stream after the header     Console.WriteLine("Saving the image")     Dim position As Long = viewer.Save(ms, 0, RasterImageFormat.Cmp, 24, 128)     Console.WriteLine("{0} bytes saved to the stream")     ' Save the stream to a file     'INSTANT VB NOTE: The following 'using' block is replaced by its pre-VB.NET 2005 equivalent:     ' using (FileStream fs = File.Create(destFileName))     Dim fs As FileStream = File.Create(destFileName)     Try         ms.WriteTo(fs)     Finally         CType(fs, IDisposable).Dispose()     End Try     ms.Close()     ' Make sure the saved file works     ' Save the image to disk     Console.WriteLine("Loading the file back")     viewer.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1) End Sub

C#

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public void RasterImageViewer_Save3(RasterImageViewer viewer)  {     string srcFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp";     string destFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_SaveStream3.bin";       // Load the source image     viewer.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1);       // Create a memory stream     MemoryStream ms = new MemoryStream();       // Save this image to the stream after the header     Console.WriteLine("Saving the image");     long position = viewer.Save(ms, 0, RasterImageFormat.Cmp, 24, 128);       Console.WriteLine("{0} bytes saved to the stream");       // Save the stream to a file     using (FileStream fs = File.Create(destFileName))        ms.WriteTo(fs);       ms.Close();       // Make sure the saved file works       // Save the image to disk     Console.WriteLine("Loading the file back");     viewer.Load(destFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1);  }

You can set the qualityFactor parameter to a value from 2 to 255 when saving JPEG and LEAD CMP compressed images, where 2 represents the highest quality and 255 the most compression.

If the image is 8 bits per pixel or greater, use the LEAD CMP format or one of the JPEG (JTIF or JFIF) formats to save disk space.

If the image is 1-bit per pixel, use the LEAD 1-bit format or a CCITT Group 3 or 4 format to save disk space.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family

Reference