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CodecsRawOptions Class
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Leadtools.Codecs Namespace : CodecsRawOptions Class



Provides extra options for loading and saving RAW Data images.

Object Model


Syntax

Visual Basic (Declaration) 
Public Class CodecsRawOptions
Visual Basic (Usage)Copy Code
Dim instance As CodecsRawOptions
C# 
public class CodecsRawOptions
C++/CLI 
public ref class CodecsRawOptions

Example

Visual BasicCopy Code
Private Structure RawData
   Public Width As Integer ' Width of image
   Public Height As Integer ' Height of image
   Public BitsPerPixel As Integer ' Bits per pixel of image--if palettized, a gray palette is generated
   Public ViewPerspective As RasterViewPerspective ' View perspective of raw data (TopLeft, BottomLeft, etc)
   Public Order As RasterByteOrder ' Rgb or Bgr
   Public XResolution As Integer ' Horizontal resolution in DPI
   Public YResolution As Integer ' Vertical resolution in DPI
   Public Offset As Integer ' Offset into file where raw data begins
   Public Padding As Boolean ' true if each line of data is padded to four bytes
   Public ReverseBits As Boolean ' true if the bits of each byte are reversed
End Structure
Private myRawData As RawData

Private Sub codecs_LoadInformation(ByVal sender As Object, ByVal e As CodecsLoadInformationEventArgs)
   ' Set the information
   e.Format = RasterImageFormat.Raw
   e.Width = myRawData.Width
   e.Height = myRawData.Height
   e.BitsPerPixel = myRawData.BitsPerPixel
   e.XResolution = myRawData.XResolution
   e.YResolution = myRawData.YResolution
   e.Offset = myRawData.Offset

   If myRawData.Padding Then
      e.Pad4 = True
   End If

   e.Order = myRawData.Order

   If myRawData.ReverseBits Then
      e.LeastSignificantBitFirst = True
   End If

   e.ViewPerspective = myRawData.ViewPerspective

   ' If image is palettized create a grayscale palette
   If e.BitsPerPixel <= 8 Then
      Dim colors As Integer = 1 << e.BitsPerPixel
      Dim palette As RasterColor() = New RasterColor(colors - 1) {}
      Dim i As Integer = 0
      Do While i < palette.Length
         Dim val As Byte = CByte((i * 255) / (colors - 1))
         palette(i) = New RasterColor(val, val, val)
         i += 1
      Loop

      e.SetPalette(palette)
   End If
End Sub


Public Sub CodecsRawOptionsExample()
   RasterCodecs.Startup()
   Dim codecs As RasterCodecs = New RasterCodecs()

   ' First, load a JPEG or CMP file
   Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp")

   ' Save this image as RAW data

   ' Set RAW options
   codecs.Options.Raw.Save.Pad4 = True
   codecs.Options.Raw.Save.ReverseBits = True
   codecs.Options.Save.OptimizedPalette = True

   Dim rawFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Test.raw"
   codecs.Save(image, rawFileName, RasterImageFormat.Raw, 0)

   ' Save information about this image so we can use it to load the RAW file
   myRawData = New RawData()
   myRawData.Width = image.Width
   myRawData.Height = image.Height
   myRawData.BitsPerPixel = image.BitsPerPixel
   myRawData.ViewPerspective = image.ViewPerspective
   myRawData.Order = image.Order
   myRawData.XResolution = image.XResolution
   myRawData.YResolution = image.YResolution
   myRawData.Offset = 0
   myRawData.Padding = True
   myRawData.ReverseBits = True

   ' We dont need the image anymore
   image.Dispose()

   ' Now load this RAW image back

   ' First subscribe to the LoadInformation event so we can set the image information
   AddHandler codecs.LoadInformation, AddressOf codecs_LoadInformation

   ' Load the image
   image = codecs.Load(rawFileName)
   codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "raw.bmp", RasterImageFormat.Bmp, image.BitsPerPixel)
   ' Unsubscribe from the event
   RemoveHandler codecs.LoadInformation, AddressOf codecs_LoadInformation

   ' Clean up
   image.Dispose()
   codecs.Dispose()
   RasterCodecs.Shutdown()
End Sub
C#Copy Code
private struct RawData 
{ 
   public int Width;                               // Width of image 
   public int Height;                              // Height of image 
   public int BitsPerPixel;                        // Bits per pixel of image--if palettized, a gray palette is generated 
   public RasterViewPerspective ViewPerspective;   // View perspective of raw data (TopLeft, BottomLeft, etc) 
   public RasterByteOrder Order;                   // Rgb or Bgr 
   public int XResolution;                         // Horizontal resolution in DPI 
   public int YResolution;                         // Vertical resolution in DPI 
   public int Offset;                              // Offset into file where raw data begins 
   public bool Padding;                            // true if each line of data is padded to four bytes 
   public bool ReverseBits;                        // true if the bits of each byte are reversed  
} 
private RawData myRawData; 
 
private void codecs_LoadInformation(object sender, CodecsLoadInformationEventArgs e) 
{ 
   // Set the information 
   e.Format = RasterImageFormat.Raw; 
   e.Width = myRawData.Width; 
   e.Height = myRawData.Height; 
   e.BitsPerPixel = myRawData.BitsPerPixel; 
   e.XResolution = myRawData.XResolution; 
   e.YResolution = myRawData.YResolution; 
   e.Offset = myRawData.Offset; 
 
   if (myRawData.Padding) 
      e.Pad4 = true; 
 
   e.Order = myRawData.Order; 
 
   if (myRawData.ReverseBits) 
      e.LeastSignificantBitFirst = true; 
 
   e.ViewPerspective = myRawData.ViewPerspective; 
 
   // If image is palettized create a grayscale palette 
   if (e.BitsPerPixel <= 8) 
   { 
      int colors = 1 << e.BitsPerPixel; 
      RasterColor[] palette = new RasterColor[colors]; 
      for (int i = 0; i < palette.Length; i++) 
      { 
         byte val = (byte)((i * 255) / (colors - 1)); 
         palette[i] = new RasterColor(val, val, val); 
      } 
 
      e.SetPalette(palette); 
   } 
} 
 
 
public void CodecsRawOptionsExample() 
{ 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // First, load a JPEG or CMP file 
   RasterImage image = codecs.Load( LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"); 
 
   // Save this image as RAW data 
 
   // Set RAW options 
   codecs.Options.Raw.Save.Pad4 = true; 
   codecs.Options.Raw.Save.ReverseBits = true; 
   codecs.Options.Save.OptimizedPalette = true; 
 
   string rawFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Test.raw"; 
   codecs.Save(image, rawFileName, RasterImageFormat.Raw, 0); 
 
   // Save information about this image so we can use it to load the RAW file 
   myRawData = new RawData(); 
   myRawData.Width = image.Width; 
   myRawData.Height = image.Height; 
   myRawData.BitsPerPixel = image.BitsPerPixel; 
   myRawData.ViewPerspective = image.ViewPerspective; 
   myRawData.Order = image.Order; 
   myRawData.XResolution = image.XResolution; 
   myRawData.YResolution = image.YResolution; 
   myRawData.Offset = 0; 
   myRawData.Padding = true; 
   myRawData.ReverseBits = true; 
 
   // We dont need the image anymore 
   image.Dispose(); 
 
   // Now load this RAW image back 
 
   // First subscribe to the LoadInformation event so we can set the image information 
   codecs.LoadInformation += new EventHandler<CodecsLoadInformationEventArgs>(codecs_LoadInformation); 
 
   // Load the image 
   image = codecs.Load(rawFileName); 
   codecs.Save(image,  LeadtoolsExamples.Common.ImagesPath.Path + "raw.bmp", RasterImageFormat.Bmp, image.BitsPerPixel); 
   // Unsubscribe from the event 
   codecs.LoadInformation -= new EventHandler<CodecsLoadInformationEventArgs>(codecs_LoadInformation); 
 
   // Clean up 
   image.Dispose(); 
   codecs.Dispose(); 
   RasterCodecs.Shutdown(); 
}

Inheritance Hierarchy

System.Object
   Leadtools.Codecs.CodecsRawOptions

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also