C#
C++/CLI
Python
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public static void AddGdiPlusDataToRegion(RasterImage image,RasterRegionXForm xform,RegionData data,RasterRegionCombineMode combineMode)
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.
data
A System.Drawing.Drawing2D.RegionData object that defines the region to add.
combineMode
The action to take regarding the existing image region, if one is defined.
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 GetGdiPlusRegionData method.
To get the region data as Windows API HRGN data, use GetGdiRegionData and AddGdiDataToRegion.
To get the region data as platform independent byte array, use RasterRegion.GetData and RasterRegion.SetData.
For more information, refer to the following:
This example will use AddGdiPlusDataToRegion and GetGdiPlusRegionData to add an elliptical region to a Leadtools.RasterImage, gets the region as a GDI+ RegionData object then re-sets it in another image.
using Leadtools;using Leadtools.Codecs;using Leadtools.Drawing;using Leadtools.ImageProcessing;using Leadtools.ImageProcessing.Color;public void GdiPlusRegionDataExample(){RasterCodecs codecs = new RasterCodecs();string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_GdiPlusData.bmp");RegionData gdipRegionData = null;// Load the source imageusing (RasterImage image = codecs.Load(srcFileName)){// Add a polygon region to it// 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);// Save the region as a GDI+ RegionData objectgdipRegionData = RasterRegionConverter.GetGdiPlusRegionData(image, null);}// Re-load the source imageusing (RasterImage image = codecs.Load(srcFileName)){// Add the GDI+ region data we saved to itRasterRegionConverter.AddGdiPlusDataToRegion(image, null, gdipRegionData, RasterRegionCombineMode.Set);// Fill this region with YellowFillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow));cmd.Run(image);// Save this imagecodecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);}codecs.Dispose();}static class LEAD_VARS{public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";}