public static class RasterRegionConverter
Public MustInherit NotInheritable Class RasterRegionConverter
public ref class RasterRegionConverter abstract sealed
This class lets you easily convert between a LEADTOOLS Leadtools.RasterRegion object and a GDI HRGN or System.Drawing (GDI+) System.Drawing.Region object.
The LEADTOOLS Leadtools.RasterRegion class provides a platform independent representation of an area of interest in a Leadtools.RasterImage that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, and WPF. Use this class To convert a LEADTOOLS Leadtools.RasterRegion object to/from a GDI HRGN and System.Drawing (GDI+) System.Drawing.Region object.
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 RasterRegionConverterExample()
{
// Load an image
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string dstFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Ellipse.jpg");
string dstFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_EllipseTranslated.jpg");
RasterCodecs codecs = new RasterCodecs();
RasterImage image = codecs.Load(srcFileName);
// We will add an ellipse region to the image
// Using GDI+, create an elliptical region
Region gdipRegion;
using (GraphicsPath path = new GraphicsPath())
{
path.AddEllipse(100, 200, 400, 300);
gdipRegion = new Region(path);
}
// Create a RasterRegion from this region
using (RasterRegion region = RasterRegionConverter.ConvertFromRegion(gdipRegion))
{
// Add this region to the image
image.SetRegion(null, region, RasterRegionCombineMode.Set);
}
gdipRegion.Dispose();
// Fill the image with a color
FillCommand cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red));
cmd.Run(image);
// Save it
codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24);
// Now get the GDI+ region from the image
using (RasterRegion region = image.GetRegion(null))
{
// Convert it to GDI+
gdipRegion = RasterRegionConverter.ConvertToRegion(region, null);
}
// Move the region 100 pixels to the right and bottom
gdipRegion.Translate(100, 100);
// Re-set it into the image, fill again and save
// Create a RasterRegion from this region
using (RasterRegion region = RasterRegionConverter.ConvertFromRegion(gdipRegion))
{
// Add this region to the image
image.SetRegion(null, region, RasterRegionCombineMode.Set);
}
gdipRegion.Dispose();
// Fill the image with a color
cmd = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow));
cmd.Run(image);
// Save it
codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24);
image.Dispose();
codecs.Dispose();
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Drawing
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Public Sub RasterRegionConverterExample()
' Load an image
Dim srcFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1.cmp"
Dim dstFileName1 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_Ellipse.jpg"
Dim dstFileName2 As String = LeadtoolsExamples.Common.ImagesPath.Path + "Image1_EllipseTranslated.jpg"
Dim codecs As New RasterCodecs()
Dim image As RasterImage = codecs.Load(srcFileName)
' We will add an ellipse region to the image
' Using GDI+, create an elliptical region
Dim gdipRegion As Region
Using path As New GraphicsPath()
path.AddEllipse(100, 200, 400, 300)
gdipRegion = New Region(path)
End Using
' Create a RasterRegion from this region
Using region As RasterRegion = RasterRegionConverter.ConvertFromRegion(gdipRegion)
' Add this region to the image
image.SetRegion(Nothing, region, RasterRegionCombineMode.Set)
End Using
gdipRegion.Dispose()
' Fill the image with a color
Dim cmd As New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Red))
cmd.Run(image)
' Save it
codecs.Save(image, dstFileName1, RasterImageFormat.Jpeg, 24)
' Now get the GDI+ region from the image
Using region As RasterRegion = image.GetRegion(Nothing)
' Convert it to GDI+
gdipRegion = RasterRegionConverter.ConvertToRegion(region, Nothing)
End Using
' Move the region 100 pixels to the right and bottom
gdipRegion.Translate(100, 100)
' Re-set it into the image, fill again and save
' Create a RasterRegion from this region
Using region As RasterRegion = RasterRegionConverter.ConvertFromRegion(gdipRegion)
' Add this region to the image
image.SetRegion(Nothing, region, RasterRegionCombineMode.Set)
End Using
gdipRegion.Dispose()
' Fill the image with a color
cmd = New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Yellow))
cmd.Run(image)
' Save it
codecs.Save(image, dstFileName2, RasterImageFormat.Jpeg, 24)
image.Dispose()
codecs.Dispose()
End Sub
Help Collections
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