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public static byte[] GetGdiRegionData(RasterImage image,RasterRegionXForm xform)
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 VB) for this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.
An array of System.Byte that contains the information that describes the region in this Leadtools.RasterImage object.
Used with AddGdiDataToRegion to load or save an image region.
The data returned by this method is the equivalent of the data returned using the Windows GetRegionData API.
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 RasterImage and GDI/GDI+.
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 imageusing (RasterImage image = codecs.Load(imageFileName)){// Add a polygon region to the imageint 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 imageInvertCommand command = new InvertCommand();command.Run(image);// Save the region and the imagecodecs.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 imageusing (RasterImage image = codecs.Load(imageFileName)){// Load the region from the file and apply it to the imagebyte[] 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 imageInvertCommand command = new InvertCommand();command.Run(image);// Save the imagecodecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);}}static class LEAD_VARS{public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";}