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RasterBufferConverter Class

Summary

Provides support for converting image data buffers.

Syntax
C#
VB
C++
public static class RasterBufferConverter 
Public MustInherit NotInheritable Class RasterBufferConverter  
public ref class RasterBufferConverter abstract sealed  

Example

This example loads an image at 24 bits per pixel, and creates a new image at 16 bits per pixel, and uses the Convert method to convert data from 24 bits per pixel to 16 bits per pixel.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using LeadtoolsExamples.Common; 
 
public void RasterBufferConverterExample() 
{ 
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp"); 
   string destFileName = Path.Combine(ImagesPath.Path, "Image1_16bits.bmp"); 
 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      codecs.ThrowExceptionsOnInvalidImages = true; 
 
      // Load the image, at 24 bit per pixel. 
      using (RasterImage srcImage = codecs.Load(srcFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1)) 
      { 
         Assert.IsNotNull(srcImage); 
         Assert.IsTrue(srcImage.BitsPerPixel == 24); 
 
         // Create a new 16-bit image. 
         using (RasterImage destImage = new RasterImage( 
            RasterMemoryFlags.Conventional, 
            srcImage.Width, 
            srcImage.Height, 
            16, 
            srcImage.Order, 
            srcImage.ViewPerspective, 
            srcImage.GetPalette(), 
            IntPtr.Zero, 
            0)) 
         { 
 
            Assert.IsNotNull(destImage); 
            Assert.IsTrue(destImage.BitsPerPixel == 16); 
 
            // Create a buffer large enough to hold one row at a time. 
            byte[] buffer = new byte[srcImage.BytesPerLine]; 
 
            // Process each row from src to dest image 
            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); 
 
               destImage.SetRow(i, buffer, 0, destImage.BytesPerLine); 
            } 
 
            destImage.Release(); 
            srcImage.Release(); 
 
            // Save the destination image back to disk 
            codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 16); 
         } 
      } 
   } 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
 
Public Sub RasterBufferConverterExample() 
   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_16bits.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) 
 
   Dim buffer As Byte() = New Byte(srcImage.BytesPerLine - 1) {} 
 
   ' Create a new 16-bit image. 
   Dim destImage As RasterImage = New RasterImage( 
                                  RasterMemoryFlags.Conventional, 
                                  srcImage.Width, 
                                  srcImage.Height, 
                                  16, 
                                  srcImage.Order, 
                                  srcImage.ViewPerspective, 
                                  srcImage.GetPalette(), 
                                  IntPtr.Zero, 
                                  0) 
 
   Debug.Assert(destImage.BitsPerPixel = 16) 
 
   ' Process each row from src to dest image 
   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) 
 
      destImage.SetRow(i, buffer, 0, destImage.BytesPerLine) 
      i += 1 
   Loop 
 
   destImage.Release() 
   srcImage.Release() 
 
   ' Save the destination image back to disk 
   codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 16) 
 
   ' Clean up 
   srcImage.Dispose() 
   destImage.Dispose() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class 
c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Examples; 
 
public void RasterBufferConverterExample(RasterImage srcImage, Stream destStream) 
{ 
   // srcImage should be 24 bits per pixel. 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   // Load the image, at 24 bit per pixel. 
   Debug.Assert(srcImage.BitsPerPixel == 24); 
 
   byte[] buffer = new byte[srcImage.BytesPerLine]; 
 
   // Create a new 16-bit image. 
   RasterImage destImage = new RasterImage( 
      RasterMemoryFlags.Conventional, 
      srcImage.Width, 
      srcImage.Height, 
      16, 
      srcImage.Order, 
      srcImage.ViewPerspective, 
      srcImage.GetPalette(), 
      null, 
      0); 
 
   Debug.Assert(destImage.BitsPerPixel == 16); 
 
   // Process each row from src to dest image 
   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); 
 
      destImage.SetRow(i, buffer, 0, destImage.BytesPerLine); 
   } 
 
   destImage.Release(); 
   srcImage.Release(); 
 
   // Save the destination image back to disk 
   codecs.Save(destImage, destStream, RasterImageFormat.Bmp, 16); 
 
   // Clean up 
   srcImage.Dispose(); 
   destImage.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
 
Public Sub RasterBufferConverterExample(ByVal srcImage As RasterImage, ByVal destStream As Stream) 
   ' srcImage should be 24 bits per pixel. 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   ' Load the image, at 24 bit per pixel. 
   Debug.Assert(srcImage.BitsPerPixel = 24) 
 
   Dim buffer As Byte() = New Byte(srcImage.BytesPerLine - 1) {} 
 
   ' Create a new 16-bit image. 
   Dim destImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, srcImage.Width, srcImage.Height, 16, srcImage.Order, srcImage.ViewPerspective, srcImage.GetPalette(), Nothing, 0) 
 
   Debug.Assert(destImage.BitsPerPixel = 16) 
 
   ' Process each row from src to dest image 
   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) 
 
      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, 16) 
 
   ' Clean up 
   srcImage.Dispose() 
   destImage.Dispose() 
End Sub 

Requirements

Target Platforms

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