Data Property (RasterImage)

C#
Visual Basic
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public object Data {get;}

'Declaration
 
Public ReadOnly Property Data As Object

'Usage
 
Dim instance As RasterImage
Dim value As Object
 
value = instance.Data

public object Data {get;}

@property (nonatomic, readonly, assign) const NSData* data;

 get_Data();

public:
property Object^ Data {
   Object^ get();
}

Property Value

The data for the image.

This value should only be used with images created with user-defined data. Other type of images will return an undefined internal value.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.WinForms
Imports Leadtools.Dicom
Imports Leadtools.Drawing

Public Sub DataExample()
   Dim codecs As RasterCodecs = New RasterCodecs()

   Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Data.bmp")

   ' Create an image with user defined data
   Dim width As Integer = 40
   Dim height As Integer = 40
   Dim bitsPerPixel As Integer = 24
   Dim size As Integer = width * height * 3
   Dim data1 As IntPtr = Marshal.AllocHGlobal(size)

   ' Load the image
   Dim image As RasterImage = New RasterImage(RasterMemoryFlags.User, width, height, bitsPerPixel, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, Nothing, data1, size)

   ' Get a pointer to the internal data and fill it with gray shades
   Dim dataSize As Integer = CInt(image.DataSize)

   Dim buffer As Byte() = New Byte(dataSize - 1) {}
   Dim inc As Boolean = True
   Dim value As Byte = 0
   Dim i As Integer = 0
   Do While i < buffer.Length
      buffer(i + 0) = value
      buffer(i + 1) = value
      buffer(i + 2) = value

      If inc Then
         If value = 255 Then
            inc = False
            value = 254
         Else
            value = value + Convert.ToByte(1)
         End If
      Else
         If value = 0 Then
            inc = True
            value = 1
         Else
            value = value - Convert.ToByte(1)
         End If
      End If
      i += 3
   Loop

   ' Copy this buffer to the image data
   Dim data2 As IntPtr = CType(image.Data, IntPtr)
   Marshal.Copy(buffer, 0, data2, buffer.Length)

   ' Save the image
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)

   image.Dispose()
   Marshal.FreeHGlobal(data1)
   codecs.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.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.WinForms;
using Leadtools.Dicom;
using Leadtools.Drawing;

      
public void DataExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string destFileName = Path.Combine(ImagesPath.Path, "Data.bmp");

   // Create an image with user defined data
   int width = 40;
   int height = 40;
   int bitsPerPixel = 24;
   int size = width * height * 3;
   IntPtr data1 = Marshal.AllocHGlobal(size);

   // Load the image
   RasterImage image = new RasterImage(
      RasterMemoryFlags.User,
      width,
      height,
      bitsPerPixel,
      RasterByteOrder.Bgr,
      RasterViewPerspective.TopLeft,
      null,
      data1,
      size);

   // Get a pointer to the internal data and fill it with gray shades
   long dataSize = image.DataSize;

   byte[] buffer = new byte[dataSize];
   bool inc = true;
   byte value = 0;
   for(int i = 0; i < buffer.Length; i += 3)
   {
      buffer[i + 0] = value;
      buffer[i + 1] = value;
      buffer[i + 2] = value;

      if(inc)
      {
         if(value == 255)
         {
            inc = false;
            value = 254;
         }
         else
            value++;
      }
      else
      {
         if(value == 0)
         {
            inc = true;
            value = 1;
         }
         else
            value--;
      }
   }

   // Copy this buffer to the image data
   IntPtr data2 = (IntPtr)image.Data;
   Marshal.Copy(buffer, 0, data2, buffer.Length);

   // Save the image
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);

   image.Dispose();
   Marshal.FreeHGlobal(data1);
   codecs.Dispose();
}

Target Platforms

Reference

RasterImage Class
RasterImage Members