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RasterBufferConverter Class

Summary

Provides support for converting image data buffers.

Syntax

WinRT C#

C++

public static class RasterBufferConverter

Public MustInherit NotInheritable Class RasterBufferConverter

public sealed static class RasterBufferConverter

function Leadtools.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.

Silverlight C#

Silverlight 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

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(); 
}

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