public static RasterRegion ConvertFromRegion(
Region region
)
region
The source GDI+ region. This parameter cannot be null (Nothing in VB).
The LEADTOOLS Leadtools.RasterRegion object this method creates. You must dispose this object after using it.
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:\LEADTOOLS22\Resources\Images";
}