RasterRegionConverter Class

Converts between a LEADTOOLS Leadtools.RasterRegion and Windows Presentation Foundation (WPF) or Silverlight System.Windows.Media.Geometry objects.

Object Model

Syntax

public static class RasterRegionConverter

public sealed static class RasterRegionConverter

function Leadtools.Windows.Media.RasterRegionConverter()

public ref class RasterRegionConverter abstract sealed

'Declaration
 
Public MustInherit NotInheritable Class RasterRegionConverter

'Usage
 
Dim instance As RasterRegionConverter

Remarks

This class lets you easily convert between a LEADTOOLS Leadtools.RasterRegion object and a WPF/Silverlight System.Windows.Media.Geometry object.

The LEADTOOLS Leadtools.RasterRegion class provides a platform independent representation of an area of interest in a Leadtools.RasterImage that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, WPF and Silverlight. Use this class To convert a LEADTOOLS Leadtools.RasterRegion object to/from a WPF/Silverlight System.Windows.Media.Geometry object.

For more information refer to RasterImage and WPF/Silverlight.

Example

Copy Code

Public Sub RasterRegionConverterExample()
      ' Load an image 
      Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
      Dim dstFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Ellipse.jpg")
      Dim dstFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_EllipseTranslated.jpg")

      Dim codecs As New RasterCodecs()

      Dim image As RasterImage = codecs.Load(srcFileName)

      ' We will add an ellipse region to the image

      ' Using WPF, create an elliptical geometry
      ' Create the ellipse geometry to add to the Path
      Dim ellipseGeometry As New EllipseGeometry()
      ellipseGeometry.Center = New Point(250, 250)
      ellipseGeometry.RadiusX = 200
      ellipseGeometry.RadiusY = 150

      Dim geometry As Geometry = ellipseGeometry

      ' Create a RasterRegion from this region
      Using region As RasterRegion = RasterRegionConverter.ConvertFromGeometry(geometry)
         ' Add this region to the image
         image.SetRegion(Nothing, region, RasterRegionCombineMode.Set)
      End Using

      ' Fill the image with a color
      Dim cmd As New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red))
      cmd.Run(image)

      ' Save it
      codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24)

      ' Now get the WPF geometry from the image
      Using region As RasterRegion = image.GetRegion(Nothing)
         geometry = RasterRegionConverter.ConvertToGeometry(region, Nothing)
      End Using

      ' Move the geometry 100 pixels to the right and bottom
      geometry.Transform = New TranslateTransform(100, 100)

      ' Re-set it into the image, fill again and save
      ' Create a RasterRegion from this region
      Using region As RasterRegion = RasterRegionConverter.ConvertFromGeometry(geometry)
         ' Add this region to the image
         image.SetRegion(Nothing, region, RasterRegionCombineMode.Set)
      End Using

      ' Fill the image with a color
      cmd = New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow))
      cmd.Run(image)

      ' Save it
      codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24)

      image.Dispose()

      codecs.Dispose()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void RasterRegionConverterExample()
   {
      // Load an image 
      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
      string dstFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Ellipse.jpg");
      string dstFileName2 = Path.Combine(LEAD_VARS.ImagesDir,"Image1_EllipseTranslated.jpg");

      RasterCodecs codecs = new RasterCodecs();

      RasterImage image = codecs.Load(srcFileName);

      // We will add an ellipse region to the image

      // Using WPF, create an elliptical geometry
      // Create the ellipse geometry to add to the Path
      EllipseGeometry ellipseGeometry = new EllipseGeometry();
      ellipseGeometry.Center = new Point(250, 250);
      ellipseGeometry.RadiusX = 200;
      ellipseGeometry.RadiusY = 150;

      Geometry geometry = ellipseGeometry;

      // Create a RasterRegion from this region
      using(RasterRegion region = RasterRegionConverter.ConvertFromGeometry(geometry))
      {
         // Add this region to the image
         image.SetRegion(null, region, RasterRegionCombineMode.Set);
      }

      // Fill the image with a color
      FillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red));
      cmd.Run(image);

      // Save it
      codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24);

      // Now get the WPF geometry from the image
      using(RasterRegion region = image.GetRegion(null))
      {
         geometry = RasterRegionConverter.ConvertToGeometry(region, null);
      }

      // Move the geometry 100 pixels to the right and bottom
      geometry.Transform = new TranslateTransform(100, 100);

      // Re-set it into the image, fill again and save
      // Create a RasterRegion from this region
      using(RasterRegion region = RasterRegionConverter.ConvertFromGeometry(geometry))
      {
         // Add this region to the image
         image.SetRegion(null, region, RasterRegionCombineMode.Set);
      }

      // Fill the image with a color
      cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow));
      cmd.Run(image);

      // Save it
      codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24);

      image.Dispose();

      codecs.Dispose();
   }

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

public void RasterRegionConverterExample()
{
   // Load an image 
   string srcFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp";

   RasterCodecs codecs = new RasterCodecs();

   RasterImage image = codecs.Load(srcFileName);

   // We will add a region to the image
   RasterRegion region = new RasterRegion(new LeadRect(250, 250, 200, 150));
   image.SetRegion(null, region, RasterRegionCombineMode.Set);

   // Now get the WPF geometry from the image
   Geometry geometry;
   using(RasterRegion rgn = image.GetRegion(null))
   {
      geometry = RasterRegionConverter.ConvertToGeometry(region, null);

      // Create a Path to be drawn to the screen.
      System.Windows.Shapes.Path myPath = new System.Windows.Shapes.Path();
      SolidColorBrush mySolidColorBrush = new SolidColorBrush();
      mySolidColorBrush.Color = Color.FromArgb(255, 204, 204, 255);
      myPath.Fill = mySolidColorBrush;
      myPath.Data = geometry;

      // Add path shape to the UI.
      StackPanel mainPanel = new StackPanel();
      mainPanel.Children.Add(myPath);
   }

   image.Dispose();
}

<TestMethod> _
Public Sub RasterRegionConverterExample()
   ' Load an image 
   Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path & "Image1.cmp"
   Dim codecs As RasterCodecs = New RasterCodecs()

   Dim image As RasterImage = codecs.Load(srcFileName)

   ' We will add a region to the image
   Dim region As RasterRegion = New RasterRegion(New LeadRect(250, 250, 200, 150))
   image.SetRegion(Nothing, region, RasterRegionCombineMode.Set)

   ' Now get the WPF geometry from the image
   Dim geometry As Geometry
   Using rgn As RasterRegion = image.GetRegion(Nothing)
      geometry = RasterRegionConverter.ConvertToGeometry(region, Nothing)

      ' Create a Path to be drawn to the screen.
      Dim myPath As System.Windows.Shapes.Path = New System.Windows.Shapes.Path()
      Dim mySolidColorBrush As SolidColorBrush = New SolidColorBrush()
      mySolidColorBrush.Color = Color.FromArgb(255, 204, 204, 255)
      myPath.Fill = mySolidColorBrush
      myPath.Data = geometry

      ' Add path shape to the UI.
      Dim mainPanel As StackPanel = New StackPanel()
      mainPanel.Children.Add(myPath)
   End Using

   image.Dispose()
End Sub

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

RasterRegionConverter Members
Leadtools.Windows.Media Namespace