In This Topic
Provides the drawing engine, which is based on SVG format.
Object Model
Syntax
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