VintaSoft Imaging .NET SDK 12.3: Documentation for .NET developer
Vintasoft.Imaging.Drawing.Svg Namespace / SvgDrawingEngine Class
Members Object Syntax Example Hierarchy Requirements SeeAlso
In This Topic
    SvgDrawingEngine Class
    In This Topic
    Provides the drawing engine, which is based on SVG format.
    Object Model
    EncoderBase Resolution AffineMatrix IRegion DrawingFactory SvgDrawingEngine
    Syntax
    'Declaration
    
    Public NotInheritable Class SvgDrawingEngine
       Inherits Vintasoft.Imaging.Drawing.DrawingEngine
    
    
    public sealed class SvgDrawingEngine : Vintasoft.Imaging.Drawing.DrawingEngine
    
    
    public __gc __sealed class SvgDrawingEngine : public Vintasoft.Imaging.Drawing.DrawingEngine*
    
    
    public ref class SvgDrawingEngine sealed : public Vintasoft.Imaging.Drawing.DrawingEngine^
    
    
    Example

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

    
    Imports System.Drawing
    Imports System.Xml
    
    Imports Vintasoft.Imaging
    Imports Vintasoft.Imaging.Drawing
    Imports Vintasoft.Imaging.Drawing.Svg
    
    Class SvgDrawingEngineExample
        ''' <summary>
        ''' Creates SVG drawing engine on specified image and performs drawing.
        ''' </summary>
        ''' <param name="width">SVG image width.</param>
        ''' <param name="height">SVG image height.</param>
        ''' <param name="resultImagePath">A path to save the result SVG image.</param>
        Public Shared Sub DrawWithSvgDrawingEngine(width As Integer, height As Integer, resultImagePath As String)
            ' create drawing engine
            Using drawingEngine As New SvgDrawingEngine(width, height)
                ' create drawing area
                Dim drawingArea As New RectangleF(0, 0, width, height)
                ' draw objects
                DrawingExample(drawingEngine, drawingArea)
    
                ' create XML writer
                Using xmlWriter__1 As XmlWriter = XmlWriter.Create(resultImagePath)
                    ' get SVG content
                    Dim content As SvgContent = drawingEngine.GetContent()
                    ' save SVG image
                    content.Save(xmlWriter__1)
                End Using
            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 System.Xml;
    
    using Vintasoft.Imaging;
    using Vintasoft.Imaging.Drawing;
    using Vintasoft.Imaging.Drawing.Svg;
    
    namespace CSHARP
    {
        class SvgDrawingEngineExample
        {
            /// <summary>
            /// Creates SVG drawing engine on specified image and performs drawing.
            /// </summary>
            /// <param name="width">SVG image width.</param>
            /// <param name="height">SVG image height.</param>
            /// <param name="resultImagePath">A path to save the result SVG image.</param>
            public static void DrawWithSvgDrawingEngine(int width, int height, string resultImagePath)
            {
                // create drawing engine
                using (SvgDrawingEngine drawingEngine = new SvgDrawingEngine(width, height))
                {
                    // create drawing area
                    RectangleF drawingArea = new RectangleF(0, 0, width, height);
                    // draw objects
                    DrawingExample(drawingEngine, drawingArea);
    
                    // create XML writer
                    using (XmlWriter xmlWriter = XmlWriter.Create(resultImagePath))
                    {
                        // get SVG content
                        SvgContent content = drawingEngine.GetContent();
                        // save SVG image
                        content.Save(xmlWriter);
                    }
                }
            }
    
            /// <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.Drawing.Svg.SvgDrawingEngine

    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