LEADTOOLS GDI/GDI+ (Leadtools.Drawing assembly)

ChangeToHBitmap(RasterImage) Method

Show in webframe
Example 





The source image.
Changes a LEADTOOLS Leadtools.RasterImage object to a Windows Device-Dependent Bitmap (DDB).
Syntax
public static IntPtr ChangeToHBitmap( 
   RasterImage image
)
'Declaration
 
Public Overloads Shared Function ChangeToHBitmap( _
   ByVal image As RasterImage _
) As IntPtr
'Usage
 
Dim image As RasterImage
Dim value As IntPtr
 
value = RasterImageConverter.ChangeToHBitmap(image)

            

            
public:
static IntPtr ChangeToHBitmap( 
   RasterImage^ image
) 

Parameters

image
The source image.

Return Value

A handle to the device dependent bitmap (DDB) this method creates.
Remarks

This method results in only one copy of the image, and it invalidates this Leadtools.RasterImage object. You must call RasterImage.Dispose after calling this method.

For more information on DDBs and DIBs, refer to Using DIBs, DDBs, and the Clipboard.

For more information refer to RasterImage and GDI/GDI+.

Example
For an example, refer to ChangeToHBitmap(RasterImage).
Copy Code  
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Drawing
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color

Public Sub ChangeToHBitmapExample()
   Dim codecs As New RasterCodecs()

   Dim hbitmap As IntPtr

   ' Load an image
   Using image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"), 24, CodecsLoadByteOrder.BgrOrGray, 1, 1)
      ' Change to DDB
      hbitmap = RasterImageConverter.ChangeToHBitmap(image)

      ' Dispose the image since it is unusable now
   End Using

   ' Change the DDB to a new LEAD RasterImage
   Using image As RasterImage = RasterImageConverter.ChangeFromHBitmap(hbitmap, IntPtr.Zero)
      ' Save this image back to disk
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Image1_ChangeToHBitmap.bmp"), RasterImageFormat.Bmp, 24)
   End Using

   DeleteObject(hbitmap)

   ' Clean up
   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.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;

public void ChangeToHBitmapExample()
{
   RasterCodecs codecs = new RasterCodecs();

   IntPtr hbitmap;

   // Load an image
   using(RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"), 24, CodecsLoadByteOrder.BgrOrGray, 1, 1))
   {
      // Change to DDB
      hbitmap = RasterImageConverter.ChangeToHBitmap(image);

      // Dispose the image since it is unusable now
   }

   // Change the DDB to a new LEAD RasterImage
   using(RasterImage image = RasterImageConverter.ChangeFromHBitmap(hbitmap, IntPtr.Zero))
   {
      // Save this image back to disk
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Image1_ChangeToHBitmap.bmp"), RasterImageFormat.Bmp, 24);
   }

   DeleteObject(hbitmap);

   // Clean up
   codecs.Dispose();
}

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

Target Platforms

See Also

Reference

RasterImageConverter Class
RasterImageConverter Members
Overload List
FromHBitmap(IntPtr,IntPtr) Method
ToHBitmap(RasterImage) Method
ChangeFromHBitmap(IntPtr,IntPtr) Method
RasterImage.FromDib
RasterImage.ToDib
RasterImage.ChangeFromDib
RasterImage.ChangeToDib

 

 


Products | Support | Contact Us | Copyright Notices
© 2006-2014 All Rights Reserved. LEAD Technologies, Inc.