public struct RasterPaintProperties : System.ValueType
'Declaration Public Structure RasterPaintProperties Inherits System.ValueType
'Usage Dim instance As RasterPaintProperties
public class RasterPaintProperties
JAVASCRIPT_NOSTRUCTS
public value class RasterPaintProperties : public System.ValueType
The various RasterImagePainter.Paint method overloads require an instance of RasterPaintProperties to be passed. The members of the RasterPaintProperties controls the speed, quality, and style used when painting.
Public Sub RasterPaintPropertiesExample() ' Create the form Dim form As New PaintPropertiesForm() form.ShowDialog() End Sub Class PaintPropertiesForm Inherits Form Private index As Integer = 0 Private rasterImage As RasterImage Private paintProperties As RasterPaintProperties Public Sub New() Text = "GDI paint engine - normal - Double click to show next RasterPaintProperties options" SetStyle(ControlStyles.ResizeRedraw, True) SetStyle(ControlStyles.AllPaintingInWmPaint, True) SetStyle(ControlStyles.OptimizedDoubleBuffer, True) SetStyle(ControlStyles.UserPaint, True) ' Load an image Dim fileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Ocr1.tif" Using codecs As New RasterCodecs() codecs.ThrowExceptionsOnInvalidImages = True rasterImage = codecs.Load(fileName) End Using paintProperties = RasterPaintProperties.Default ' Start with GDI paint engine and normal paint scaling paintProperties.PaintEngine = RasterPaintEngine.Gdi paintProperties.PaintDisplayMode = RasterPaintDisplayModeFlags.None End Sub Protected Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not IsNothing(rasterImage) Then rasterImage.Dispose() End If End If MyBase.Dispose(disposing) End Sub Protected Overrides Sub OnDoubleClick(ByVal e As EventArgs) Select index Case 0 Text = "GDI paint engine - SourceAnd ROP - Double click to show next RasterPaintProperties options" paintProperties.RasterOperation = RasterPaintProperties.SourceAnd Case 1 Text = "GDI paint engine - Scale to gray - Double click to show next RasterPaintProperties options" paintProperties.RasterOperation = RasterPaintProperties.SourceCopy paintProperties.PaintDisplayMode = RasterPaintDisplayModeFlags.ScaleToGray Case 2 Text = "GDI+ paint engine - Double click to set the opacity" paintProperties.PaintEngine = RasterPaintEngine.GdiPlus Case 3 Text = "GDI+ paint engine - Opacity set to 50% - Done" paintProperties.Opacity = 128 End Select index = index + 1 Invalidate() MyBase.OnDoubleClick(e) End Sub Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) ' Paint the image Dim destRect As LeadRect = LeadRect.FromLTRB(ClientRectangle.Left, ClientRectangle.Top, ClientRectangle.Right, ClientRectangle.Bottom) destRect = rasterImage.CalculatePaintModeRectangle( _ rasterImage.ImageWidth, _ rasterImage.ImageHeight, _ destRect, _ RasterPaintSizeMode.Fit, _ RasterPaintAlignMode.Center, _ RasterPaintAlignMode.Center) RasterImagePainter.Paint(rasterImage, e.Graphics, destRect, paintProperties) MyBase.OnPaint(e) End Sub End Class
public void RasterPaintPropertiesExample() { // Create the form PaintPropertiesForm form = new PaintPropertiesForm(); form.ShowDialog(); } class PaintPropertiesForm : Form { private int index = 0; private RasterImage rasterImage; private RasterPaintProperties paintProperties; public PaintPropertiesForm() { Text = "GDI paint engine - normal - Double click to show next RasterPaintProperties options"; SetStyle(ControlStyles.ResizeRedraw, true); SetStyle(ControlStyles.AllPaintingInWmPaint, true); SetStyle(ControlStyles.OptimizedDoubleBuffer, true); SetStyle(ControlStyles.UserPaint, true); // Load an image string fileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif"); using(RasterCodecs codecs = new RasterCodecs()) { codecs.ThrowExceptionsOnInvalidImages = true; rasterImage = codecs.Load(fileName); } paintProperties = RasterPaintProperties.Default; // Start with GDI paint engine and normal paint scaling paintProperties.PaintEngine = RasterPaintEngine.Gdi; paintProperties.PaintDisplayMode = RasterPaintDisplayModeFlags.None; } protected override void Dispose(bool disposing) { if(disposing) { if(rasterImage != null) rasterImage.Dispose(); } base.Dispose(disposing); } protected override void OnDoubleClick(EventArgs e) { switch(index) { case 0: Text = "GDI paint engine - SourceAnd ROP - Double click to show next RasterPaintProperties options"; paintProperties.RasterOperation = RasterPaintProperties.SourceAnd; break; case 1: Text = "GDI paint engine - Scale to gray - Double click to show next RasterPaintProperties options"; paintProperties.RasterOperation = RasterPaintProperties.SourceCopy; paintProperties.PaintDisplayMode = RasterPaintDisplayModeFlags.ScaleToGray; break; case 2: Text = "GDI+ paint engine - Double click to set the opacity"; paintProperties.PaintEngine = RasterPaintEngine.GdiPlus; break; case 3: Text = "GDI+ paint engine - Opacity set to 50% - Done"; paintProperties.Opacity = 128; break; default: break; } index++; Invalidate(); base.OnDoubleClick(e); } protected override void OnPaint(PaintEventArgs e) { // Paint the image LeadRect destRect = LeadRect.FromLTRB(ClientRectangle.Left, ClientRectangle.Top, ClientRectangle.Right, ClientRectangle.Bottom); destRect = RasterImage.CalculatePaintModeRectangle( rasterImage.ImageWidth, rasterImage.ImageHeight, destRect, RasterPaintSizeMode.Fit, RasterPaintAlignMode.Center, RasterPaintAlignMode.Center); RasterImagePainter.Paint(rasterImage, e.Graphics, destRect, paintProperties); base.OnPaint(e); } } 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