VintaSoft Imaging .NET SDK 12.3: Documentation for .NET developer
Vintasoft.Imaging.Pdf.Drawing Namespace / PdfDrawingEngine Class
Members Object Syntax Example Hierarchy Requirements SeeAlso
In This Topic
    PdfDrawingEngine Class
    In This Topic
    Provides the drawing engine, which is based on PDF drawing surface.
    Object Model
    PdfCompressionSettings PdfGraphics Resolution AffineMatrix IRegion DrawingFactory PdfDrawingEngine
    Syntax
    'Declaration
    
    Public Class PdfDrawingEngine
       Inherits Vintasoft.Imaging.Drawing.DrawingEngine
    
    
    public class PdfDrawingEngine : Vintasoft.Imaging.Drawing.DrawingEngine
    
    
    public __gc class PdfDrawingEngine : public Vintasoft.Imaging.Drawing.DrawingEngine*
    
    
    public ref class PdfDrawingEngine : public Vintasoft.Imaging.Drawing.DrawingEngine^
    
    
    Example

    This C#/VB.NET code shows how to create PDF drawing surface and use created drawing engine for drawing of different graphic objects (figures and text).

    
    Imports System.Drawing
    
    Imports Vintasoft.Imaging
    Imports Vintasoft.Imaging.Drawing
    Imports Vintasoft.Imaging.Pdf
    Imports Vintasoft.Imaging.Pdf.Drawing
    Imports Vintasoft.Imaging.Pdf.Tree
    
    Class PdfDrawingEngineExample
        ''' <summary>
        ''' Creates PDF drawing engine on specified PDF page and performs drawing.
        ''' </summary>
        ''' <param name="width">PDF page width.</param>
        ''' <param name="height">PDF page height.</param>
        ''' <param name="resultImagePath">A path to save the drawing result.</param>
        Public Shared Sub DrawWithPdfDrawingEngine(width As Integer, height As Integer, resultImagePath As String)
            ' create empty PDF document
            Using document As New PdfDocument()
                ' page size
                Dim pageSize As New RectangleF(0, 0, width, height)
                ' create new page of specified size
                Dim page As New PdfPage(document, pageSize)
                ' add page to a PDF document
                document.Pages.Add(page)
    
                ' create graphics from PDF page
                Using graphics As PdfGraphics = PdfGraphics.FromPage(page)
                    ' create drawing engine
                    Using drawingEngine As New PdfDrawingEngine(graphics, True)
                        ' create drawing area
                        Dim drawingArea As New RectangleF(0, 0, width, height)
                        ' draw objects
                        DrawingExample(drawingEngine, drawingArea)
                    End Using
                End Using
    
                ' save document
                document.Save(resultImagePath)
            End Using
        End Sub
    
        ''' <summary>
        ''' Draws graphic objects using specified drawing engine.
        ''' </summary>
        ''' <param name="drawingEngine">Drawing engine.</param>
        ''' <param name="drawingArea">Image area to draw objects in.</param>
        Public Shared Sub DrawingExample(drawingEngine As DrawingEngine, drawingArea As RectangleF)
            ' create bounding rectangle for ellipse
            Dim ellipseRect As New RectangleF(drawingArea.X + drawingArea.Width * 0.3F, drawingArea.Y + drawingArea.Height * 0.3F, drawingArea.Width * 0.4F, drawingArea.Height * 0.4F)
    
            ' create brush and pen to draw ellipse
            Using brush As IDrawingSolidBrush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.Blue)
                Using pen As IDrawingPen = drawingEngine.DrawingFactory.CreatePen(Color.Red, 4F)
                    ' fill ellipse
                    drawingEngine.FillEllipse(brush, ellipseRect)
                    ' stroke ellipse
                    drawingEngine.DrawEllipse(pen, ellipseRect)
                End Using
            End Using
    
            ' create brush and font to draw text
            Using textBrush As IDrawingSolidBrush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.Yellow)
                Using font As IDrawingFont = drawingEngine.DrawingFactory.CreateFont("Arial", 30, True, False)
                    ' create properties to layout text
                    Dim layoutProperties As New TextLayoutProperties(AnchorType.Center)
                    ' draw text
                    drawingEngine.DrawText("Text", font, textBrush, ellipseRect, layoutProperties)
                End Using
            End Using
        End Sub
    End Class
    
    
    
    using System.Drawing;
    
    using Vintasoft.Imaging;
    using Vintasoft.Imaging.Drawing;
    using Vintasoft.Imaging.Pdf;
    using Vintasoft.Imaging.Pdf.Drawing;
    using Vintasoft.Imaging.Pdf.Tree;
    
    namespace CSHARP
    {
        class PdfDrawingEngineExample
        {
            /// <summary>
            /// Creates PDF drawing engine on specified PDF page and performs drawing.
            /// </summary>
            /// <param name="width">PDF page width.</param>
            /// <param name="height">PDF page height.</param>
            /// <param name="resultImagePath">A path to save the drawing result.</param>
            public static void DrawWithPdfDrawingEngine(int width, int height, string resultImagePath)
            {
                // create empty PDF document
                using (PdfDocument document = new PdfDocument())
                {
                    // page size
                    RectangleF pageSize = new RectangleF(0, 0, width, height);
                    // create new page of specified size
                    PdfPage page = new PdfPage(document, pageSize);
                    // add page to a PDF document
                    document.Pages.Add(page);
    
                    // create graphics from PDF page
                    using (PdfGraphics graphics = PdfGraphics.FromPage(page))
                    // create drawing engine
                    using (PdfDrawingEngine drawingEngine = new PdfDrawingEngine(graphics, true))
                    {
                        // create drawing area
                        RectangleF drawingArea = new RectangleF(0, 0, width, height);
                        // draw objects
                        DrawingExample(drawingEngine, drawingArea);
                    }
    
                    // save document
                    document.Save(resultImagePath);
                }
            }
    
            /// <summary>
            /// Draws graphic objects using specified drawing engine.
            /// </summary>
            /// <param name="drawingEngine">Drawing engine.</param>
            /// <param name="drawingArea">Image area to draw objects in.</param>
            public static void DrawingExample(DrawingEngine drawingEngine, RectangleF drawingArea)
            {
                // create bounding rectangle for ellipse
                RectangleF ellipseRect = new RectangleF(
                    drawingArea.X + drawingArea.Width * 0.3f,
                    drawingArea.Y + drawingArea.Height * 0.3f,
                    drawingArea.Width * 0.4f,
                    drawingArea.Height * 0.4f);
    
                // create brush and pen to draw ellipse
                using (IDrawingSolidBrush brush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.Blue))
                {
                    using (IDrawingPen pen = drawingEngine.DrawingFactory.CreatePen(Color.Red, 4f))
                    {
                        // fill ellipse
                        drawingEngine.FillEllipse(brush, ellipseRect);
                        // stroke ellipse
                        drawingEngine.DrawEllipse(pen, ellipseRect);
                    }
                }
    
                // create brush and font to draw text
                using (IDrawingSolidBrush textBrush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.Yellow))
                {
                    using (IDrawingFont font = drawingEngine.DrawingFactory.CreateFont("Arial", 30, true, false))
                    {
                        // create properties to layout text
                        TextLayoutProperties layoutProperties = new TextLayoutProperties(AnchorType.Center);
                        // draw text
                        drawingEngine.DrawText("Text", font, textBrush, ellipseRect, layoutProperties);
                    }
                }
            }
        }
    }
    
    

    Inheritance Hierarchy

    System.Object
       Vintasoft.Imaging.Drawing.DrawingEngine
          Vintasoft.Imaging.Pdf.Drawing.PdfDrawingEngine

    Requirements

    Target Platforms: .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    See Also