Public Shared Function CalculateConvertSize( _
   ByVal inWidth As Integer, _
   ByVal inBitsPerPixel As Integer, _
   ByVal outWidth As Integer, _
   ByVal outBitsPerPixel As Integer _
) As Integer

Dim inWidth As Integer
Dim inBitsPerPixel As Integer
Dim outWidth As Integer
Dim outBitsPerPixel As Integer
Dim value As Integer
 
value = RasterBufferConverter.CalculateConvertSize(inWidth, inBitsPerPixel, outWidth, outBitsPerPixel)

public static int CalculateConvertSize( 
   int inWidth,
   int inBitsPerPixel,
   int outWidth,
   int outBitsPerPixel
)

public:
static int CalculateConvertSize( 
   int inWidth,
   int inBitsPerPixel,
   int outWidth,
   int outBitsPerPixel
) 

Public Sub CalculateConvertSizeExample()
      Dim codecs As RasterCodecs = New RasterCodecs()
      codecs.ThrowExceptionsOnInvalidImages = True

      Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
      Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_4bits.bmp")

      ' Load the image, at 24 bit per pixel.
      Dim srcImage As RasterImage = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1)
      Debug.Assert(srcImage.BitsPerPixel = 24)

      ' Create a new 4-bit image.
      Dim destImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, srcImage.Width, srcImage.Height, 4, srcImage.Order, srcImage.ViewPerspective, srcImage.GetPalette(), IntPtr.Zero, 0)
      Debug.Assert(destImage.BitsPerPixel = 4)

      Dim bufferSize As Integer = RasterBufferConverter.CalculateConvertSize(srcImage.Width, srcImage.BitsPerPixel, destImage.Width, destImage.BitsPerPixel)

      ' Allocate the buffer in unmanaged memory
      Dim buffer As IntPtr = Marshal.AllocHGlobal(bufferSize)

      ' Process each row from srcImage to destImage.
      srcImage.Access()
      destImage.Access()

      Dim i As Integer = 0
      Do While i < srcImage.Height
         srcImage.GetRow(i, buffer, srcImage.BytesPerLine)
         RasterBufferConverter.Convert(buffer, srcImage.Width, srcImage.BitsPerPixel, destImage.BitsPerPixel, srcImage.Order, destImage.Order, Nothing, Nothing, 0, 8, 0, RasterConvertBufferFlags.None)
         destImage.SetRow(i, buffer, destImage.BytesPerLine)
         i += 1
      Loop

      destImage.Release()
      srcImage.Release()

      ' Save the destination image back to disk
      codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 4)

      ' Clean up
      Marshal.FreeHGlobal(buffer)
      srcImage.Dispose()
      destImage.Dispose()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void CalculateConvertSizeExample()
   {
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
      string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_4bits.bmp");

      // Load the image, at 24 bit per pixel.
      RasterImage srcImage = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1);
      Debug.Assert(srcImage.BitsPerPixel == 24);

      // Create a new 4-bit image.
      RasterImage destImage = new RasterImage(
         RasterMemoryFlags.Conventional,
         srcImage.Width,
         srcImage.Height,
         4,
         srcImage.Order,
         srcImage.ViewPerspective,
         srcImage.GetPalette(),
         IntPtr.Zero,
         0);
      Debug.Assert(destImage.BitsPerPixel == 4);

      int bufferSize = RasterBufferConverter.CalculateConvertSize(
         srcImage.Width,
         srcImage.BitsPerPixel,
         destImage.Width,
         destImage.BitsPerPixel);

      // Allocate the buffer in unmanaged memory
      IntPtr buffer = Marshal.AllocHGlobal(bufferSize);

      // Process each row from srcImage to destImage.
      srcImage.Access();
      destImage.Access();

      for(int i = 0; i < srcImage.Height; i++)
      {
         srcImage.GetRow(i, buffer, srcImage.BytesPerLine);
         RasterBufferConverter.Convert(
            buffer,
            srcImage.Width,
            srcImage.BitsPerPixel,
            destImage.BitsPerPixel,
            srcImage.Order,
            destImage.Order,
            null,
            null,
            0,
            8,
            0,
            RasterConvertBufferFlags.None);
         destImage.SetRow(i, buffer, destImage.BytesPerLine);
      }

      destImage.Release();
      srcImage.Release();

      // Save the destination image back to disk
      codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 4);

      // Clean up
      Marshal.FreeHGlobal(buffer);
      srcImage.Dispose();
      destImage.Dispose();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

public void CalculateConvertSizeExample(RasterImage srcImage, Stream destStream)
{
   // srcImage should be 24 bits per pixel.
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Create a new 4-bit image.
   RasterImage destImage = new RasterImage(
      RasterMemoryFlags.Conventional,
      srcImage.Width,
      srcImage.Height,
      4,
      srcImage.Order,
      srcImage.ViewPerspective,
      srcImage.GetPalette(),
      null,
      0);
   Debug.Assert(destImage.BitsPerPixel == 4);

   int bufferSize = RasterBufferConverter.CalculateConvertSize(
      srcImage.Width,
      srcImage.BitsPerPixel,
      destImage.Width,
      destImage.BitsPerPixel);

   // Allocate the buffer
   byte[] buffer = new byte[bufferSize];

   // Process each row from srcImage to destImage.
   srcImage.Access();
   destImage.Access();

   for(int i = 0; i < srcImage.Height; i++)
   {
      srcImage.GetRow(i, buffer, 0, srcImage.BytesPerLine);
      RasterBufferConverter.Convert(
         buffer,
         0,
         srcImage.Width,
         srcImage.BitsPerPixel,
         destImage.BitsPerPixel,
         srcImage.Order,
         destImage.Order,
         null,
         null,
         0,
         8,
         0,
         RasterConvertBufferFlags.None);
      destImage.SetRow(i, buffer, 0, destImage.BytesPerLine);
   }

   destImage.Release();
   srcImage.Release();

   // Save the destination image back to disk
   codecs.Save(destImage, destStream, RasterImageFormat.Bmp, 4);

   // Clean up
   srcImage.Dispose();
   destImage.Dispose();
}

Public Sub CalculateConvertSizeExample(ByVal srcImage As RasterImage, ByVal destStream As Stream)
   ' srcImage should be 24 bits per pixel.
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   ' Create a new 4-bit image.
   Dim destImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, srcImage.Width, srcImage.Height, 4, srcImage.Order, srcImage.ViewPerspective, srcImage.GetPalette(), Nothing, 0)
   Debug.Assert(destImage.BitsPerPixel = 4)

   Dim bufferSize As Integer = RasterBufferConverter.CalculateConvertSize(srcImage.Width, srcImage.BitsPerPixel, destImage.Width, destImage.BitsPerPixel)

   ' Allocate the buffer
   Dim buffer As Byte() = New Byte(bufferSize - 1){}

   ' Process each row from srcImage to destImage.
   srcImage.Access()
   destImage.Access()

   Dim i As Integer = 0
   Do While i < srcImage.Height
      srcImage.GetRow(i, buffer, 0, srcImage.BytesPerLine)
      RasterBufferConverter.Convert(buffer, 0, srcImage.Width, srcImage.BitsPerPixel, destImage.BitsPerPixel, srcImage.Order, destImage.Order, Nothing, Nothing, 0, 8, 0, RasterConvertBufferFlags.None)
      destImage.SetRow(i, buffer, 0, destImage.BytesPerLine)
      i += 1
   Loop

   destImage.Release()
   srcImage.Release()

   ' Save the destination image back to disk
   codecs.Save(destImage, destStream, RasterImageFormat.Bmp, 4)

   ' Clean up
   srcImage.Dispose()
   destImage.Dispose()
End Sub