Public Sub AddDataToRegion( _
   ByVal xform As RasterRegionXForm, _
   ByVal data() As Byte, _
   ByVal dataOffset As Integer, _
   ByVal combineMode As RasterRegionCombineMode _
) 

Visual Basic (Usage)	Copy Code
Dim instance As RasterImage Dim xform As RasterRegionXForm Dim data() As Byte Dim dataOffset As Integer Dim combineMode As RasterRegionCombineMode   instance.AddDataToRegion(xform, data, dataOffset, combineMode)

public void AddDataToRegion( 
   RasterRegionXForm xform,
   byte[] data,
   int dataOffset,
   RasterRegionCombineMode combineMode
)

public:
void AddDataToRegion( 
   RasterRegionXForm^ xform,
   array<byte>^ data,
   int dataOffset,
   RasterRegionCombineMode combineMode
) 

Parameters

xform

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.

data

Array of bytes that describe the region data.

dataOffset

Zero-based index into data.

combineMode

The action to take regarding the existing image region, if one is defined.

This example will show how to use GetRegionData and AddDataToRegion to save/load an image region

Visual Basic

Copy Code

Public Sub RegionDataExample()    RasterCodecs.Startup()    Dim codecs As RasterCodecs = New RasterCodecs()    Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"    Dim destFileName1 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionDataOriginal.bmp"    Dim regionFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionData.bin"    Dim destFileName2 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionDataLoaded.bmp"    RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName)    RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName)    codecs.Dispose()    RasterCodecs.Shutdown() End Sub Private Sub RegionDataBefore(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String)    ' Load the image    Dim image As RasterImage = codecs.Load(imageFileName)    ' Add a polygon region to the image    Dim x1 As Integer = image.ImageWidth \ 4    Dim y1 As Integer = image.ImageHeight \ 4    Dim x2 As Integer = image.ImageWidth \ 3    Dim y2 As Integer = image.ImageHeight \ 3    Dim pts As Point() = {New Point(x1, y1), New Point(x2, y1), New Point(x1, y2), New Point(x2, y2)}    image.AddPolygonToRegion(Nothing, pts, FillMode.Winding, RasterRegionCombineMode.Set)    ' Draw something on the image    Dim command As InvertCommand = New InvertCommand()    command.Run(image)    ' Save the region and the image    codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)    Dim data As Byte() = image.GetRegionData(Nothing)    Dim fs As FileStream = File.Create(regionFileName)    Try       fs.Write(data, 0, data.Length)    Finally       CType(fs, IDisposable).Dispose()    End Try    image.Dispose() End Sub Private Sub RegionDataAfter(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String)    ' Load the image    Dim image As RasterImage = codecs.Load(imageFileName)    ' Load the region from the file and apply it to the image    Dim data As Byte()    Dim fs As FileStream = File.OpenRead(regionFileName)    Try       data = New Byte(Convert.ToByte(fs.Length - 1)) {}       fs.Read(data, 0, data.Length)    Finally       CType(fs, IDisposable).Dispose()    End Try    image.AddDataToRegion(Nothing, data, 0, RasterRegionCombineMode.Set)    ' Draw something on the image    Dim command As InvertCommand = New InvertCommand()    command.Run(image)    ' Save the image    codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24)    image.Dispose() End Sub

C#

Copy Code

public void RegionDataExample()  {     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();       string srcFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp";     string destFileName1 = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionDataOriginal.bmp";     string regionFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionData.bin";     string destFileName2 = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_RegionDataLoaded.bmp";       RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName);     RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName);       codecs.Dispose();     RasterCodecs.Shutdown();  }    void RegionDataBefore(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName)  {     // Load the image     RasterImage image = codecs.Load(imageFileName);       // Add a polygon region to the image     int x1 = image.ImageWidth / 4;     int y1 = image.ImageHeight / 4;     int x2 = image.ImageWidth / 3;     int y2 = image.ImageHeight / 3;       Point[] pts =     {        new Point(x1, y1),        new Point(x2, y1),        new Point(x1, y2),        new Point(x2, y2)     };       image.AddPolygonToRegion(null, pts, FillMode.Winding, RasterRegionCombineMode.Set);       // Draw something on the image     InvertCommand command = new InvertCommand();     command.Run(image);       // Save the region and the image     codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);       byte[] data = image.GetRegionData(null);     using(FileStream fs = File.Create(regionFileName))        fs.Write(data, 0, data.Length);       image.Dispose();  }    void RegionDataAfter(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName)  {     // Load the image     RasterImage image = codecs.Load(imageFileName);       // Load the region from the file and apply it to the image     byte[] data;       using(FileStream fs = File.OpenRead(regionFileName))     {        data = new byte[fs.Length];        fs.Read(data, 0, data.Length);     }       image.AddDataToRegion(null, data, 0, RasterRegionCombineMode.Set);       // Draw something on the image     InvertCommand command = new InvertCommand();     command.Run(image);       // Save the image     codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);       image.Dispose();  }

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

This method can only be used to copy the region data from one RasterImage to another, using the GetRegionData method.

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.

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

Reference