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RasterImageGdiPlusGraphicsContainer Class

Summary
Encapsulates a GDI+ object used when creating a System.Drawing.Graphics surface of a Leadtools.RasterImage.
Syntax
C#
C++/CLI
Python
public class RasterImageGdiPlusGraphicsContainer : IDisposable 
public ref class RasterImageGdiPlusGraphicsContainer : public System.IDisposable   
class RasterImageGdiPlusGraphicsContainer(IDisposable): 
Remarks

This class holds the System.Drawing.Graphics, System.Drawing.Image and System.Drawing.Region representation of the surface of the Leadtools.RasterImage.

You can then use the members of the RasterImageGdiPlusGraphicsContainer along with GDI+ calls to draw on the surface of the Leadtools.RasterImage.

You can also use the RasterImagePainter.CreateGraphics method to create a GDI+ Graphics object from a Leadtools.RasterImage.

For more information refer to RasterImage and GDI/GDI+.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
 
 
public void RasterImageGdiPlusGraphicsContainerExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_CreateGdiPlusGraphics.bmp"); 
 
   // Load the image 
   using (RasterImage image = codecs.Load(srcFileName)) 
   { 
      // Create a graphics object for this image surface and draw something on it 
      using (RasterImageGdiPlusGraphicsContainer container = new RasterImageGdiPlusGraphicsContainer(image)) 
      { 
         using (Graphics g = container.Graphics) 
         { 
            using (Brush b = new SolidBrush(Color.FromArgb(128, 0, 0, 0))) 
            { 
               g.FillEllipse(b, new Rectangle(0, 0, image.ImageWidth, image.ImageHeight)); 
            } 
         } 
      } 
 
      // Save the image back on disk 
      codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
   } 
 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 22.0.2023.3.31
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Drawing Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.