public static void AddGdiDataToRegion( RasterImage image, RasterRegionXForm xform, byte[] data, int dataOffset, RasterRegionCombineMode combineMode )
'Declaration Public Shared Sub AddGdiDataToRegion( _ ByVal image As RasterImage, _ ByVal xform As RasterRegionXForm, _ ByVal data() As Byte, _ ByVal dataOffset As Integer, _ ByVal combineMode As RasterRegionCombineMode _ )
'Usage Dim image As RasterImage Dim xform As RasterRegionXForm Dim data() As Byte Dim dataOffset As Integer Dim combineMode As RasterRegionCombineMode RasterRegionConverter.AddGdiDataToRegion(image, xform, data, dataOffset, combineMode)
public: static void AddGdiDataToRegion( RasterImage^ image, RasterRegionXForm^ xform, array<byte>^ data, int dataOffset, RasterRegionCombineMode combineMode )
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 Leadtools.RasterRegionCombineMode.
This method can be used to copy the region data from one RasterImage to another, using the GetGdiRegionData method.
To get the region data as GDI+ System.Drawing.Drawing2D.RegionData object, use GetGdiPlusRegionData and AddGdiPlusDataToRegion.
To get the region data as platform independent byte array, use RasterRegion.GetData and RasterRegion.SetData.
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+.
Imports Leadtools Imports Leadtools.Codecs Imports Leadtools.Drawing Imports Leadtools.ImageProcessing Imports Leadtools.ImageProcessing.Color Public Sub GdiRegionDataExample() Dim codecs As New RasterCodecs() Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp" Dim destFileName1 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionDataOriginal.bmp" Dim regionFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionData.bin" Dim destFileName2 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_GdiRegionDataLoaded.bmp" RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName) RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName) codecs.Dispose() End Sub Private Sub RegionDataBefore(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String) ' Load the image Using 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 LeadPoint = _ { _ New LeadPoint(x1, y1), _ New LeadPoint(x2, y1), _ New LeadPoint(x1, y2), _ New LeadPoint(x2, y2) _ } image.AddPolygonToRegion(Nothing, pts, LeadFillMode.Winding, RasterRegionCombineMode.Set) ' Draw something on the image Dim command As New InvertCommand() command.Run(image) ' Save the region and the image codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) Dim data() As Byte = RasterRegionConverter.GetGdiRegionData(image, Nothing) Using fs As FileStream = File.Create(regionFileName) fs.Write(data, 0, data.Length) End Using End Using End Sub Private Sub RegionDataAfter(ByVal codecs As RasterCodecs, ByVal imageFileName As String, ByVal destFileName As String, ByVal regionFileName As String) ' Load the image Using image As RasterImage = codecs.Load(imageFileName) ' Load the region from the file and apply it to the image Dim data() As Byte Using fs As FileStream = File.OpenRead(regionFileName) ReDim data(CType(fs.Length, Integer) - 1) fs.Read(data, 0, data.Length) End Using RasterRegionConverter.AddGdiDataToRegion(image, Nothing, data, 0, RasterRegionCombineMode.Set) ' Draw something on the image Dim command As New InvertCommand() command.Run(image) ' Save the image codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) End Using End Sub
using Leadtools; using Leadtools.Codecs; using Leadtools.Drawing; using Leadtools.ImageProcessing; using Leadtools.ImageProcessing.Color; public void GdiRegionDataExample() { RasterCodecs codecs = new RasterCodecs(); string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionDataOriginal.bmp"); string regionFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionData.bin"); string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiRegionDataLoaded.bmp"); RegionDataBefore(codecs, srcFileName, destFileName1, regionFileName); RegionDataAfter(codecs, srcFileName, destFileName2, regionFileName); codecs.Dispose(); } private void RegionDataBefore(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName) { // Load the image using(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; LeadPoint[] pts = { new LeadPoint(x1, y1), new LeadPoint(x2, y1), new LeadPoint(x1, y2), new LeadPoint(x2, y2) }; image.AddPolygonToRegion(null, pts, LeadFillMode.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 = RasterRegionConverter.GetGdiRegionData(image, null); using(FileStream fs = File.Create(regionFileName)) { fs.Write(data, 0, data.Length); } } } private void RegionDataAfter(RasterCodecs codecs, string imageFileName, string destFileName, string regionFileName) { // Load the image using(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); } RasterRegionConverter.AddGdiDataToRegion(image, 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); } } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; }