AddRegionToRegion(RasterImage,RasterRegionXForm,IntPtr,RasterRegionCombineMode) Method

Visual Basic
C#
Objective-C
Java
C++

public static void AddRegionToRegion( 
   RasterImage image,
   RasterRegionXForm xform,
   IntPtr region,
   RasterRegionCombineMode combineMode
)

'Declaration
 
Public Overloads Shared Sub AddRegionToRegion( _
   ByVal image As RasterImage, _
   ByVal xform As RasterRegionXForm, _
   ByVal region As IntPtr, _
   ByVal combineMode As RasterRegionCombineMode _
)

'Usage
 
Dim image As RasterImage
Dim xform As RasterRegionXForm
Dim region As IntPtr
Dim combineMode As RasterRegionCombineMode
 
RasterRegionConverter.AddRegionToRegion(image, xform, region, combineMode)

public:
static void AddRegionToRegion( 
   RasterImage^ image,
   RasterRegionXForm^ xform,
   IntPtr region,
   RasterRegionCombineMode combineMode
)

Parameters

image: The source image.
xform: Leadtools.RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates. If you specify null (Nothing in Visual Basic) in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.
region: The Windows region handle to add.
combineMode: The action to take regarding the existing image region, if one is defined.

To update an existing region, you specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to Leadtools.RasterRegionCombineMode.

For more information, refer to Creating a Region.

For more information, refer to Saving A Region.

For more information, refer to Working with the Existing Region.

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

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Drawing
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color

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

   Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"
   Dim destFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_AddRegionToRegion.bmp"

   ' Load the image
   Dim image As RasterImage = codecs.Load(srcFileName)

   ' Create a GDI+ region
   Dim region As Region

   Using path As New GraphicsPath()
      path.AddRectangle(New Rectangle(100, 100, 200, 200))
      path.AddEllipse(New Rectangle(150, 150, 200, 200))
      region = New Region(path)
   End Using

   ' Get the Windows GDI handle for this region
   Dim hrgn As IntPtr

   Using btmp As New Bitmap(1, 1)
      Using graphics As Graphics = graphics.FromImage(btmp)
         hrgn = region.GetHrgn(graphics)
      End Using
   End Using

   ' Add this region to the raster image
   RasterRegionConverter.AddRegionToRegion(image, Nothing, hrgn, RasterRegionCombineMode.Set)

   region.ReleaseHrgn(hrgn)
   region.Dispose()

   ' Draw something on the image
   Dim command As New InvertCommand()
   command.Run(image)

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

   image.Dispose()
   codecs.Dispose()
End Sub

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;

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

   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddRegionToRegion.bmp");

   // Load the image
   RasterImage image = codecs.Load(srcFileName);

   // Create a GDI+ region
   Region region;

   using(GraphicsPath path = new GraphicsPath())
   {
      path.AddRectangle(new Rectangle(100, 100, 200, 200));
      path.AddEllipse(new Rectangle(150, 150, 200, 200));
      region = new Region(path);
   }

   // Get the Windows GDI handle for this region
   IntPtr hrgn;

   using(Bitmap btmp = new Bitmap(1, 1))
   {
      using(Graphics graphics = Graphics.FromImage(btmp))
      {
         hrgn = region.GetHrgn(graphics);
      }
   }

   // Add this region to the raster image
   RasterRegionConverter.AddRegionToRegion(image, null, hrgn, RasterRegionCombineMode.Set);

   region.ReleaseHrgn(hrgn);
   region.Dispose();

   // Draw something on the image
   InvertCommand command = new InvertCommand();
   command.Run(image);

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

   image.Dispose();
   codecs.Dispose();
}

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

Target Platforms

Reference

RasterRegionConverter Class
RasterRegionConverter Members
Overload List