Text on a Path & SVG Fonts

- Extraction interface for SvgRenderer
- Initial support for Text on a Path
- Initial support for Svg Fonts
- Support for symbol element
- Minor bug fixes with image pattern rendering
- Additional support for Text whitespace modes

Source/Document Structure/SvgFragment.cs

@@ -148,86 +148,13 @@ namespace Svg
         }
 
         /// <summary>
-        /// Applies the required transforms to <see cref="SvgRenderer"/>.
+        /// Applies the required transforms to <see cref="ISvgRenderer"/>.
         /// </summary>
-        /// <param name="renderer">The <see cref="SvgRenderer"/> to be transformed.</param>
-        protected internal override bool PushTransforms(SvgRenderer renderer)
+        /// <param name="renderer">The <see cref="ISvgRenderer"/> to be transformed.</param>
+        protected internal override bool PushTransforms(ISvgRenderer renderer)
         {
             if (!base.PushTransforms(renderer)) return false;
-
-            if (!this.ViewBox.Equals(SvgViewBox.Empty))
-            {
-                var width = this.Width.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this);
-                var height = this.Height.ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
-
-                var fScaleX = width / this.ViewBox.Width;
-                var fScaleY = height / this.ViewBox.Height;
-                var fMinX = -this.ViewBox.MinX;
-                var fMinY = -this.ViewBox.MinY;
-
-                if (AspectRatio.Align != SvgPreserveAspectRatio.none)
-                {
-                    if (AspectRatio.Slice)
-                    {
-                        fScaleX = Math.Max(fScaleX, fScaleY);
-                        fScaleY = Math.Max(fScaleX, fScaleY);
-                    }
-                    else
-                    {
-                        fScaleX = Math.Min(fScaleX, fScaleY);
-                        fScaleY = Math.Min(fScaleX, fScaleY);
-                    }
-                    float fViewMidX = (this.ViewBox.Width / 2) * fScaleX;
-                    float fViewMidY = (this.ViewBox.Height / 2) * fScaleY;
-                    float fMidX = width / 2;
-                    float fMidY = height / 2;
-
-                    switch (AspectRatio.Align)
-                    {
-                        case SvgPreserveAspectRatio.xMinYMin:
-                            break;
-                        case SvgPreserveAspectRatio.xMidYMin:
-                            fMinX += fMidX - fViewMidX;
-                            break;
-                        case SvgPreserveAspectRatio.xMaxYMin:
-                            fMinX += width - this.ViewBox.Width * fScaleX;
-                            break;
-                        case SvgPreserveAspectRatio.xMinYMid:
-                            fMinY += fMidY - fViewMidY;
-                            break;
-                        case SvgPreserveAspectRatio.xMidYMid:
-                            fMinX += fMidX - fViewMidX;
-                            fMinY += fMidY - fViewMidY;
-                            break;
-                        case SvgPreserveAspectRatio.xMaxYMid:
-                            fMinX += width - this.ViewBox.Width * fScaleX;
-                            fMinY += fMidY - fViewMidY;
-                            break;
-                        case SvgPreserveAspectRatio.xMinYMax:
-                            fMinY += height - this.ViewBox.Height * fScaleY;
-                            break;
-                        case SvgPreserveAspectRatio.xMidYMax:
-                            fMinX += fMidX - fViewMidX;
-                            fMinY += height - this.ViewBox.Height * fScaleY;
-                            break;
-                        case SvgPreserveAspectRatio.xMaxYMax:
-                            fMinX += width - this.ViewBox.Width * fScaleX;
-                            fMinY += height - this.ViewBox.Height * fScaleY;
-                            break;
-                        default:
-                            break;
-                    }
-                }
-
-                var x = _x.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this);
-                var y = _y.ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
-
-                renderer.AddClip(new Region(new RectangleF(x, y, width, height)));
-                renderer.ScaleTransform(fScaleX, fScaleY, MatrixOrder.Prepend);
-                renderer.TranslateTransform(x,y);
-                renderer.TranslateTransform(fMinX, fMinY);
-            }
-
+            this.ViewBox.AddViewBoxTransform(this.AspectRatio, renderer, this);
             return true;
         }
         

Source/Document Structure/SvgGroup.cs

@@ -9,15 +9,11 @@ namespace Svg
     [SvgElement("g")]
     public class SvgGroup : SvgVisualElement
     {
-        public SvgGroup()
-        {
-        }
-
         /// <summary>
         /// Gets the <see cref="GraphicsPath"/> for this element.
         /// </summary>
         /// <value></value>
-        public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
         {
             return GetPaths(this, renderer);
         }
@@ -57,26 +53,7 @@ namespace Svg
         }
 
         protected override bool Renderable { get { return false; } }
-
-        ///// <summary>
-        ///// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="Graphics"/> object.
-        ///// </summary>
-        ///// <param name="graphics">The <see cref="Graphics"/> object to render to.</param>
-        //protected override void Render(SvgRenderer renderer)
-        //{
-        //    if (!Visible || !Displayable)
-        //        return;
-
-        //    if (this.PushTransforms(renderer))
-        //    {
-        //        this.SetClip(renderer);
-        //        base.RenderChildren(renderer);
-        //        this.ResetClip(renderer);
-        //        this.PopTransforms(renderer);
-        //    }
-        //}
-
-        
+                
         public override SvgElement DeepCopy()
         {
             return DeepCopy<SvgGroup>();

Source/Document Structure/SvgSwitch.cs

@@ -17,7 +17,7 @@ namespace Svg
         /// Gets the <see cref="GraphicsPath"/> for this element.
         /// </summary>
         /// <value></value>
-        public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
         {
             return GetPaths(this, renderer);
         }
@@ -60,7 +60,7 @@ namespace Svg
         /// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="Graphics"/> object.
         /// </summary>
         /// <param name="renderer">The <see cref="Graphics"/> object to render to.</param>
-        protected override void Render(SvgRenderer renderer)
+        protected override void Render(ISvgRenderer renderer)
         {
             if (!Visible || !Displayable)
                 return;

Source/Document Structure/SvgSymbol.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+
+namespace Svg.Document_Structure
+{
+    /// <summary>
+    /// An element used to group SVG shapes.
+    /// </summary>
+    [SvgElement("symbol")]
+    public class SvgSymbol : SvgVisualElement
+    {
+
+        /// <summary>
+        /// Gets or sets the viewport of the element.
+        /// </summary>
+        /// <value></value>
+        [SvgAttribute("viewBox")]
+        public SvgViewBox ViewBox
+        {
+            get { return this.Attributes.GetAttribute<SvgViewBox>("viewBox"); }
+            set { this.Attributes["viewBox"] = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the aspect of the viewport.
+        /// </summary>
+        /// <value></value>
+        [SvgAttribute("preserveAspectRatio")]
+        public SvgAspectRatio AspectRatio
+        {
+            get { return this.Attributes.GetAttribute<SvgAspectRatio>("preserveAspectRatio"); }
+            set { this.Attributes["preserveAspectRatio"] = value; }
+        }
+
+        /// <summary>
+        /// Gets the <see cref="GraphicsPath"/> for this element.
+        /// </summary>
+        /// <value></value>
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
+        {
+            return GetPaths(this, renderer);
+        }
+
+        /// <summary>
+        /// Gets the bounds of the element.
+        /// </summary>
+        /// <value>The bounds.</value>
+        public override System.Drawing.RectangleF Bounds
+        {
+            get
+            {
+                var r = new RectangleF();
+                foreach (var c in this.Children)
+                {
+                    if (c is SvgVisualElement)
+                    {
+                        // First it should check if rectangle is empty or it will return the wrong Bounds.
+                        // This is because when the Rectangle is Empty, the Union method adds as if the first values where X=0, Y=0
+                        if (r.IsEmpty)
+                        {
+                            r = ((SvgVisualElement)c).Bounds;
+                        }
+                        else
+                        {
+                            var childBounds = ((SvgVisualElement)c).Bounds;
+                            if (!childBounds.IsEmpty)
+                            {
+                                r = RectangleF.Union(r, childBounds);
+                            }
+                        }
+                    }
+                }
+
+                return r;
+            }
+        }
+
+        protected override bool Renderable { get { return false; } }
+
+        /// <summary>
+        /// Applies the required transforms to <see cref="ISvgRenderer"/>.
+        /// </summary>
+        /// <param name="renderer">The <see cref="ISvgRenderer"/> to be transformed.</param>
+        protected internal override bool PushTransforms(ISvgRenderer renderer)
+        {
+            if (!base.PushTransforms(renderer)) return false;
+            this.ViewBox.AddViewBoxTransform(this.AspectRatio, renderer, null);
+            return true;
+        }
+
+        public override SvgElement DeepCopy()
+        {
+            return DeepCopy<SvgSymbol>();
+        }
+
+        public override SvgElement DeepCopy<T>()
+        {
+            var newObj = base.DeepCopy<T>() as SvgSymbol;
+            if (this.Fill != null)
+                newObj.Fill = this.Fill.DeepCopy() as SvgPaintServer;
+            return newObj;
+        }
+    }
+}

Source/Document Structure/SvgUse.cs

@@ -35,10 +35,10 @@ namespace Svg
         }
 
         /// <summary>
-        /// Applies the required transforms to <see cref="SvgRenderer"/>.
+        /// Applies the required transforms to <see cref="ISvgRenderer"/>.
         /// </summary>
-        /// <param name="renderer">The <see cref="SvgRenderer"/> to be transformed.</param>
-        protected internal override bool PushTransforms(SvgRenderer renderer)
+        /// <param name="renderer">The <see cref="ISvgRenderer"/> to be transformed.</param>
+        protected internal override bool PushTransforms(ISvgRenderer renderer)
         {
             if (!base.PushTransforms(renderer)) return false;
             renderer.TranslateTransform(this.X.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this), 
@@ -55,7 +55,7 @@ namespace Svg
             this.Y = 0;
         }
 
-        public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
         {
             SvgVisualElement element = (SvgVisualElement)this.OwnerDocument.IdManager.GetElementById(this.ReferencedElement);
             return (element != null) ? element.Path(renderer) : null;
@@ -66,20 +66,9 @@ namespace Svg
             get { return new System.Drawing.RectangleF(); }
         }
 
-        //        public override SvgElementCollection Children
-        //        {
-        //            get
-        //            {
-        //                SvgElement element = this.OwnerDocument.IdManager.GetElementById(this.ReferencedElement);
-        //                SvgElementCollection elements = new SvgElementCollection(this, true);
-        //                elements.Add(element);
-        //                return elements;
-        //            }
-        //        }
-
         protected override bool Renderable { get { return false; } }
 
-        protected override void Render(SvgRenderer renderer)
+        protected override void Render(ISvgRenderer renderer)
         {
             if (!Visible || !Displayable)
                 return;

Source/Extensibility/SvgForeignObject.cs

@@ -17,7 +17,7 @@ namespace Svg
         /// Gets the <see cref="GraphicsPath"/> for this element.
         /// </summary>
         /// <value></value>
-        public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
         {
             return GetPaths(this, renderer);
         }

Source/Filter Effects/ImageBuffer.cs

@@ -14,8 +14,8 @@ namespace Svg.FilterEffects
 
         private Dictionary<string, Bitmap> _images;
         private RectangleF _bounds;
-        private SvgRenderer _renderer;
-        private Action<SvgRenderer> _renderMethod;
+        private ISvgRenderer _renderer;
+        private Action<ISvgRenderer> _renderMethod;
         private float _inflate;
 
         public Matrix Transform { get; set; }
@@ -41,7 +41,7 @@ namespace Svg.FilterEffects
             }
         }
 
-        public ImageBuffer(RectangleF bounds, float inflate, SvgRenderer renderer, Action<SvgRenderer> renderMethod)
+        public ImageBuffer(RectangleF bounds, float inflate, ISvgRenderer renderer, Action<ISvgRenderer> renderMethod)
         {
             _bounds = bounds;
             _inflate = inflate;
@@ -124,7 +124,7 @@ namespace Svg.FilterEffects
         }
         private string ProcessKey(string key)
         {
-            if (string.IsNullOrEmpty(key)) return BufferKey;
+            if (string.IsNullOrEmpty(key)) return _images.ContainsKey(BufferKey) ? BufferKey : SvgFilterPrimitive.SourceGraphic;
             return key;
         }
 
@@ -136,7 +136,7 @@ namespace Svg.FilterEffects
                                      (int)(_bounds.Height + 2 * _inflate * _bounds.Height + _bounds.Y));
             using (var renderer = SvgRenderer.FromImage(graphic))
             {
-                renderer.Boundable(_renderer.Boundable());
+                renderer.SetBoundable(_renderer.GetBoundable());
                 var transform = new Matrix();
                 transform.Translate(_bounds.Width * _inflate, _bounds.Height * _inflate);
                 renderer.Transform = transform;

Source/Filter Effects/SvgFilter.cs

@@ -80,10 +80,10 @@ namespace Svg.FilterEffects
         }
 
         /// <summary>
-        /// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="SvgRenderer"/> object.
+        /// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="ISvgRenderer"/> object.
         /// </summary>
-        /// <param name="renderer">The <see cref="SvgRenderer"/> object to render to.</param>
-        protected override void Render(SvgRenderer renderer)
+        /// <param name="renderer">The <see cref="ISvgRenderer"/> object to render to.</param>
+        protected override void Render(ISvgRenderer renderer)
         {
 			base.RenderChildren(renderer);
         }
@@ -109,7 +109,7 @@ namespace Svg.FilterEffects
             return transformMatrix;
         }
 
-        private RectangleF GetPathBounds(SvgVisualElement element, SvgRenderer renderer, Matrix transform)
+        private RectangleF GetPathBounds(SvgVisualElement element, ISvgRenderer renderer, Matrix transform)
         {
             var bounds = element.Path(renderer).GetBounds();
             var pts = new PointF[] { bounds.Location, new PointF(bounds.Right, bounds.Bottom) };
@@ -119,7 +119,7 @@ namespace Svg.FilterEffects
                                   Math.Abs(pts[0].X - pts[1].X), Math.Abs(pts[0].Y - pts[1].Y));
         }
 
-        public void ApplyFilter(SvgVisualElement element, SvgRenderer renderer, Action<SvgRenderer> renderMethod)
+        public void ApplyFilter(SvgVisualElement element, ISvgRenderer renderer, Action<ISvgRenderer> renderMethod)
         {
             var inflate = 0.5f;
             var transform = GetTransform(element);
@@ -139,11 +139,10 @@ namespace Svg.FilterEffects
                 var bufferImg = buffer.Buffer;
                 bufferImg.Save(@"C:\test.png");
                 var imgDraw = RectangleF.Inflate(bounds, inflate * bounds.Width, inflate * bounds.Height);
-                var prevClip = renderer.Clip;
-                renderer.Clip = new Region(imgDraw);
+                var prevClip = renderer.GetClip();
+                renderer.SetClip(new Region(imgDraw));
                 renderer.DrawImage(bufferImg, imgDraw, new RectangleF(bounds.X, bounds.Y, imgDraw.Width, imgDraw.Height), GraphicsUnit.Pixel);
-                renderer.Clip = prevClip;
-                //renderer.DrawImage(bufferImg, bounds, bounds, GraphicsUnit.Pixel);
+                renderer.SetClip(prevClip);
             }
         }
                 

Source/Painting/ISvgStylable.cs

@@ -19,6 +19,6 @@ namespace Svg
         float StrokeMiterLimit { get; set; }
         SvgUnitCollection StrokeDashArray { get; set; }
         SvgUnit StrokeDashOffset { get; set; }
-        GraphicsPath Path(SvgRenderer renderer);
+        GraphicsPath Path(ISvgRenderer renderer);
     }
 }
\ No newline at end of file

Source/Painting/SvgColourServer.cs

@@ -35,7 +35,7 @@ namespace Svg
             set { this._colour = value; }
         }
 
-        public override Brush GetBrush(SvgVisualElement styleOwner, SvgRenderer renderer, float opacity)
+        public override Brush GetBrush(SvgVisualElement styleOwner, ISvgRenderer renderer, float opacity)
         {
             //is none?
             if (this == SvgPaintServer.None) return new SolidBrush(System.Drawing.Color.Transparent);

Source/Painting/SvgDeferredPaintServer.cs

@@ -44,7 +44,7 @@ namespace Svg
             }
         }
 
-        public override System.Drawing.Brush GetBrush(SvgVisualElement styleOwner, SvgRenderer renderer, float opacity)
+        public override System.Drawing.Brush GetBrush(SvgVisualElement styleOwner, ISvgRenderer renderer, float opacity)
         {
             EnsureServer(styleOwner);
             return _concreteServer.GetBrush(styleOwner, renderer, opacity);

Source/Painting/SvgGradientServer.cs

@@ -130,7 +130,7 @@ namespace Svg
         /// </summary>
         /// <param name="owner">The parent <see cref="SvgVisualElement"/>.</param>
         /// <param name="opacity">The opacity of the colour blend.</param>
-        protected ColorBlend GetColorBlend(SvgRenderer renderer, float opacity, bool radial)
+        protected ColorBlend GetColorBlend(ISvgRenderer renderer, float opacity, bool radial)
         {
             int colourBlends = this.Stops.Count;
             bool insertStart = false;
@@ -184,7 +184,7 @@ namespace Svg
             for (int i = 0; i < colourBlends; i++)
             {
                 var currentStop = this.Stops[radial ? this.Stops.Count - 1 - actualStops : actualStops];
-                var boundWidth = renderer.Boundable().Bounds.Width;
+                var boundWidth = renderer.GetBoundable().Bounds.Width;
 
                 mergedOpacity = opacity * currentStop.Opacity;
                 position =

Source/Painting/SvgLinearGradientServer.cs

@@ -79,7 +79,7 @@ namespace Svg
             Y2 = new SvgUnit(SvgUnitType.Percentage, 0F);
         }
 
-        public override Brush GetBrush(SvgVisualElement renderingElement, SvgRenderer renderer, float opacity)
+        public override Brush GetBrush(SvgVisualElement renderingElement, ISvgRenderer renderer, float opacity)
         {
             LoadStops(renderingElement);
             if (IsInvalid)
@@ -89,7 +89,7 @@ namespace Svg
 
             try
             {
-                if (this.GradientUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.Boundable(renderingElement);
+                if (this.GradientUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.SetBoundable(renderingElement);
 
                 var specifiedStart = CalculateStart(renderer);
                 var specifiedEnd = CalculateEnd(renderer);
@@ -116,12 +116,12 @@ namespace Svg
             }
         }
 
-        private PointF CalculateStart(SvgRenderer renderer)
+        private PointF CalculateStart(ISvgRenderer renderer)
         {
             return TransformPoint(SvgUnit.GetDevicePointOffset(this.X1, this.Y1, renderer, this));
         }
 
-        private PointF CalculateEnd(SvgRenderer renderer)
+        private PointF CalculateEnd(ISvgRenderer renderer)
         {
             return TransformPoint(SvgUnit.GetDevicePointOffset(this.X2, this.Y2, renderer, this));
         }
@@ -181,7 +181,7 @@ namespace Svg
             return new GradientPoints(effectiveStart, effectiveEnd);
         }
 
-        private ColorBlend CalculateColorBlend(SvgRenderer renderer, float opacity, PointF specifiedStart, PointF effectiveStart, PointF specifiedEnd, PointF effectiveEnd)
+        private ColorBlend CalculateColorBlend(ISvgRenderer renderer, float opacity, PointF specifiedStart, PointF effectiveStart, PointF specifiedEnd, PointF effectiveEnd)
         {
             var colorBlend = GetColorBlend(renderer, opacity, false);
 

Source/Painting/SvgMarker.cs

@@ -87,7 +87,7 @@ namespace Svg
             Overflow = SvgOverflow.hidden;
         }
 
-        public override System.Drawing.Drawing2D.GraphicsPath Path(SvgRenderer renderer)
+        public override System.Drawing.Drawing2D.GraphicsPath Path(ISvgRenderer renderer)
         {
             var path = this.Children.FirstOrDefault(x => x is SvgPath);
             if (path != null)
@@ -131,7 +131,7 @@ namespace Svg
         /// <param name="pOwner"></param>
         /// <param name="pMarkerPoint1"></param>
         /// <param name="pMarkerPoint2"></param>
-        public void RenderMarker(SvgRenderer pRenderer, SvgPath pOwner, PointF pRefPoint, PointF pMarkerPoint1, PointF pMarkerPoint2)
+        public void RenderMarker(ISvgRenderer pRenderer, SvgPath pOwner, PointF pRefPoint, PointF pMarkerPoint1, PointF pMarkerPoint2)
         {
             float xDiff = pMarkerPoint2.X - pMarkerPoint1.X;
             float yDiff = pMarkerPoint2.Y - pMarkerPoint1.Y;
@@ -148,7 +148,7 @@ namespace Svg
         /// <param name="pMarkerPoint1"></param>
         /// <param name="pMarkerPoint2"></param>
         /// <param name="pMarkerPoint3"></param>
-        public void RenderMarker(SvgRenderer pRenderer, SvgPath pOwner, PointF pRefPoint, PointF pMarkerPoint1, PointF pMarkerPoint2, PointF pMarkerPoint3)
+        public void RenderMarker(ISvgRenderer pRenderer, SvgPath pOwner, PointF pRefPoint, PointF pMarkerPoint1, PointF pMarkerPoint2, PointF pMarkerPoint3)
         {
             float xDiff = pMarkerPoint2.X - pMarkerPoint1.X;
             float yDiff = pMarkerPoint2.Y - pMarkerPoint1.Y;
@@ -168,7 +168,7 @@ namespace Svg
         /// <param name="pRenderer"></param>
         /// <param name="pOwner"></param>
         /// <param name="pMarkerPoint"></param>
-        private void RenderPart2(float fAngle, SvgRenderer pRenderer, SvgPath pOwner, PointF pMarkerPoint)
+        private void RenderPart2(float fAngle, ISvgRenderer pRenderer, SvgPath pOwner, PointF pMarkerPoint)
         {
             Pen pRenderPen = CreatePen(pOwner, pRenderer);
 
@@ -216,7 +216,7 @@ namespace Svg
         /// </summary>
         /// <param name="pStroke"></param>
         /// <returns></returns>
-        private Pen CreatePen(SvgPath pPath, SvgRenderer renderer)
+        private Pen CreatePen(SvgPath pPath, ISvgRenderer renderer)
         {
             Brush pBrush = pPath.Stroke.GetBrush(this, renderer, Opacity);
             switch (MarkerUnits)

Source/Painting/SvgPaintServer.cs

@@ -26,10 +26,10 @@ namespace Svg
         }
 
         /// <summary>
-        /// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="SvgRenderer"/> object.
+        /// Renders the <see cref="SvgElement"/> and contents to the specified <see cref="ISvgRenderer"/> object.
         /// </summary>
-        /// <param name="renderer">The <see cref="SvgRenderer"/> object to render to.</param>
-        protected override void Render(SvgRenderer renderer)
+        /// <param name="renderer">The <see cref="ISvgRenderer"/> object to render to.</param>
+        protected override void Render(ISvgRenderer renderer)
         {
             // Never render paint servers or their children
         }
@@ -39,7 +39,7 @@ namespace Svg
         /// </summary>
         /// <param name="styleOwner">The owner <see cref="SvgVisualElement"/>.</param>
         /// <param name="opacity">The opacity of the brush.</param>
-        public abstract Brush GetBrush(SvgVisualElement styleOwner, SvgRenderer renderer, float opacity);
+        public abstract Brush GetBrush(SvgVisualElement styleOwner, ISvgRenderer renderer, float opacity);
 
         /// <summary>
         /// Returns a <see cref="T:System.String"/> that represents the current <see cref="T:System.Object"/>.

Source/Painting/SvgPatternServer.cs

@@ -20,8 +20,8 @@ namespace Svg
         private SvgUnit _x;
         private SvgUnit _y;
         private SvgViewBox _viewBox;
-        private SvgCoordinateUnits _patternUnits;
-        private SvgCoordinateUnits _patternContentUnits;
+        private SvgCoordinateUnits _patternUnits = SvgCoordinateUnits.ObjectBoundingBox;
+        private SvgCoordinateUnits _patternContentUnits = SvgCoordinateUnits.UserSpaceOnUse;
 
 		[SvgAttribute("overflow")]
 		public SvgOverflow Overflow
@@ -129,7 +129,7 @@ namespace Svg
         /// </summary>
         /// <param name="renderingElement">The owner <see cref="SvgVisualElement"/>.</param>
         /// <param name="opacity">The opacity of the brush.</param>
-        public override Brush GetBrush(SvgVisualElement renderingElement, SvgRenderer renderer, float opacity)
+        public override Brush GetBrush(SvgVisualElement renderingElement, ISvgRenderer renderer, float opacity)
         {
             // If there aren't any children, return null
             if (this.Children.Count == 0)
@@ -141,7 +141,7 @@ namespace Svg
 
             try
             {
-                if (this.PatternUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.Boundable(renderingElement);
+                if (this.PatternUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.SetBoundable(renderingElement);
 
                 float width = this._width.ToDeviceValue(renderer, UnitRenderingType.Horizontal, this);
                 float height = this._height.ToDeviceValue(renderer, UnitRenderingType.Vertical, this);
@@ -153,11 +153,7 @@ namespace Svg
                     float x = this._x.ToDeviceValue(renderer, UnitRenderingType.HorizontalOffset, this);
                     float y = this._y.ToDeviceValue(renderer, UnitRenderingType.VerticalOffset, this);
 
-                    patternMatrix.Translate(x + -1.0f, y + -1.0f);
-                }
-                else
-                {
-                    patternMatrix.Translate(-1, -1);
+                    patternMatrix.Translate(x, y);
                 }
 
                 if (this.ViewBox.Height > 0 || this.ViewBox.Width > 0)
@@ -167,20 +163,16 @@ namespace Svg
                 }
 
                 Bitmap image = new Bitmap((int)width, (int)height);
-                using (SvgRenderer iRenderer = SvgRenderer.FromImage(image))
+                using (var iRenderer = SvgRenderer.FromImage(image))
                 {
-                    iRenderer.Boundable((_patternContentUnits == SvgCoordinateUnits.ObjectBoundingBox) ? new GenericBoundable(0, 0, width, height) : renderer.Boundable());
+                    iRenderer.SetBoundable((_patternContentUnits == SvgCoordinateUnits.ObjectBoundingBox) ? new GenericBoundable(0, 0, width, height) : renderer.GetBoundable());
                     iRenderer.Transform = patternMatrix;
-                    iRenderer.CompositingQuality = CompositingQuality.HighQuality;
                     iRenderer.SmoothingMode = SmoothingMode.AntiAlias;
-                    iRenderer.PixelOffsetMode = PixelOffsetMode.Half;
-
+                    
                     foreach (SvgElement child in this.Children)
                     {
                         child.RenderElement(iRenderer);
                     }
-
-                    iRenderer.Save();
                 }
 
                 image.Save(string.Format(@"C:\test{0:D3}.png", imgNumber++));

Source/Painting/SvgRadialGradientServer.cs

@@ -98,16 +98,16 @@ namespace Svg
 
         private object _lockObj = new Object();
 
-        public override Brush GetBrush(SvgVisualElement renderingElement, SvgRenderer renderer, float opacity)
+        public override Brush GetBrush(SvgVisualElement renderingElement, ISvgRenderer renderer, float opacity)
         {
             LoadStops(renderingElement);
 
             try
             {
-                if (this.GradientUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.Boundable(renderingElement);
+                if (this.GradientUnits == SvgCoordinateUnits.ObjectBoundingBox) renderer.SetBoundable(renderingElement);
                 
                 // Calculate the path and transform it appropriately
-                var origin = renderer.Boundable().Location;
+                var origin = renderer.GetBoundable().Location;
                 var center = new PointF(origin.X + CenterX.ToDeviceValue(renderer, UnitRenderingType.HorizontalOffset, this),
                                          origin.Y + CenterY.ToDeviceValue(renderer, UnitRenderingType.VerticalOffset, this));
                 var specifiedRadius = Radius.ToDeviceValue(renderer, UnitRenderingType.Other, this);
@@ -181,7 +181,7 @@ namespace Svg
             return bounds.Height / (points[2].Y - points[1].Y);
         }
 
-        private PointF CalculateFocalPoint(SvgRenderer renderer, PointF origin)
+        private PointF CalculateFocalPoint(ISvgRenderer renderer, PointF origin)
         {
             var deviceFocalX = origin.X + FocalX.ToDeviceValue(renderer, UnitRenderingType.HorizontalOffset, this);
             var deviceFocalY = origin.Y + FocalY.ToDeviceValue(renderer, UnitRenderingType.VerticalOffset, this);
@@ -203,7 +203,7 @@ namespace Svg
             return path;
         }
 
-        private ColorBlend CalculateColorBlend(SvgRenderer renderer, float opacity, float scale, out float outScale)
+        private ColorBlend CalculateColorBlend(ISvgRenderer renderer, float opacity, float scale, out float outScale)
         {
             var colorBlend = GetColorBlend(renderer, opacity, true);
             float newScale;

Source/Paths/SvgPath.cs

@@ -38,9 +38,9 @@ namespace Svg
         /// Gets or sets the length of the path.
         /// </summary>
         [SvgAttribute("pathLength")]
-        public int PathLength
+        public float PathLength
         {
-        	get { return this.Attributes.GetAttribute<int>("pathLength"); }
+            get { return this.Attributes.GetAttribute<float>("pathLength"); }
             set { this.Attributes["pathLength"] = value; }
         }
 
@@ -81,7 +81,7 @@ namespace Svg
         /// <summary>
         /// Gets the <see cref="GraphicsPath"/> for this element.
         /// </summary>
-        public override GraphicsPath Path(SvgRenderer renderer)
+        public override GraphicsPath Path(ISvgRenderer renderer)
         {
             if (this._path == null || this.IsPathDirty)
             {
@@ -131,15 +131,15 @@ namespace Svg
         }
 
 		/// <summary>
-		/// Renders the stroke of the <see cref="SvgVisualElement"/> to the specified <see cref="SvgRenderer"/>
+		/// Renders the stroke of the <see cref="SvgVisualElement"/> to the specified <see cref="ISvgRenderer"/>
 		/// </summary>
-		/// <param name="renderer">The <see cref="SvgRenderer"/> object to render to.</param>
-		protected internal override void  RenderStroke(SvgRenderer renderer)
+		/// <param name="renderer">The <see cref="ISvgRenderer"/> object to render to.</param>
+		protected internal override void  RenderStroke(ISvgRenderer renderer)
 		{
- 			if (this.Stroke != null)
+            if (this.Stroke != null && this.Stroke != SvgColourServer.None)
 			{
 				float strokeWidth = this.StrokeWidth.ToDeviceValue(renderer, UnitRenderingType.Other, this);
-				using (Pen pen = new Pen(this.Stroke.GetBrush(this, renderer, this.StrokeOpacity), strokeWidth))
+                using (Pen pen = new Pen(this.Stroke.GetBrush(this, renderer, this.StrokeOpacity * this.Opacity), strokeWidth))
 				{
 					if (this.StrokeDashArray != null && this.StrokeDashArray.Count > 0)
 					{

Source/Rendering/IGraphicsProvider.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+
+namespace Svg
+{
+    public interface IGraphicsProvider
+    {
+        Graphics GetGraphics();
+    }
+}

Source/Rendering/ISvgRenderer.cs

+using System;
+using System.Drawing.Drawing2D;
+using System.Drawing;
+using System.Collections.Generic;
+
+namespace Svg
+{
+    public interface ISvgRenderer : IDisposable
+    {
+        float DpiY { get; }
+        void DrawImage(Image image, RectangleF destRect, RectangleF srcRect, GraphicsUnit graphicsUnit);
+        void DrawImageUnscaled(Image image, Point location);
+        void DrawPath(Pen pen, GraphicsPath path);
+        void FillPath(Brush brush, GraphicsPath path);
+        float FontBaselineOffset(IFontDefn font);
+        ISvgBoundable GetBoundable();
+        Region GetClip();
+        IList<RectangleF> MeasureCharacters(string text, IFontDefn font);
+        SizeF MeasureString(string text, IFontDefn font);
+        ISvgBoundable PopBoundable();
+        void RotateTransform(float fAngle, MatrixOrder order = MatrixOrder.Append);
+        void ScaleTransform(float sx, float sy, MatrixOrder order = MatrixOrder.Append);
+        void SetBoundable(ISvgBoundable boundable);
+        void SetClip(Region region, CombineMode combineMode = CombineMode.Replace);
+        SmoothingMode SmoothingMode { get; set; }
+        Matrix Transform { get; set; }
+        void TranslateTransform(float dx, float dy, MatrixOrder order = MatrixOrder.Append);
+    }
+}