public static Region ConvertToRegion(
RasterRegion region,
RasterRegionXForm xform
)
region
The source LEADTOOLS region. This parameter cannot be null (Nothing in VB).
xform
Leadtools.RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates.
The System.Drawing.Region 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";
}