public static class RasterRegionConverter
'Declaration Public MustInherit NotInheritable Class RasterRegionConverter
'Usage Dim instance As RasterRegionConverter
public sealed static class RasterRegionConverter
function Leadtools.Drawing.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+, WPF and Silverlight. 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+.
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
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:\Users\Public\Documents\LEADTOOLS Images"; }
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2