source: branches/HeuristicLab.Problems.GrammaticalOptimization/SharpVectorRenderingGdi/Gdi/GdiPathRendering.cs @ 13857

using System;
using System.Drawing;
using System.Drawing.Drawing2D;

using SharpVectors.Dom.Css;
using SharpVectors.Dom.Svg;

namespace SharpVectors.Renderers.Gdi
{
    public sealed class GdiPathRendering : GdiRendering
  {
        #region Constructor and Destructor

    public GdiPathRendering(SvgElement element) 
            : base(element)
    {
    }

        #endregion

    #region Public Methods

        public override void BeforeRender(GdiGraphicsRenderer renderer)
        {
            if (_uniqueColor.IsEmpty)
              _uniqueColor = renderer.GetNextColor(this.Element);

            GdiGraphicsWrapper graphics = renderer.GraphicsWrapper;

            _graphicsContainer = graphics.BeginContainer();
            SetQuality(graphics);
            Transform(graphics);
        }

        public override void Render(GdiGraphicsRenderer renderer)
        {
            GdiGraphicsWrapper graphics = renderer.GraphicsWrapper;

            SvgRenderingHint hint = element.RenderingHint;
            if (hint != SvgRenderingHint.Shape || hint == SvgRenderingHint.Clipping)
            {
                return;
            }
            if (element.ParentNode is SvgClipPathElement)
            {
                return;
            }

            SvgStyleableElement styleElm = (SvgStyleableElement)element;

      string sVisibility = styleElm.GetPropertyValue("visibility");
      string sDisplay    = styleElm.GetPropertyValue("display");
            if (String.Equals(sVisibility, "hidden") || String.Equals(sDisplay, "none"))
            {
                return;
            }

            GraphicsPath gp = CreatePath(element);

      if (gp != null)
      {
        Clip(graphics);

        GdiSvgPaint fillPaint = new GdiSvgPaint(styleElm, "fill");
        Brush brush = fillPaint.GetBrush(gp);

        GdiSvgPaint strokePaint = new GdiSvgPaint(styleElm, "stroke");
        Pen pen = strokePaint.GetPen(gp);

        if (brush != null) 
        {
          if (brush is PathGradientBrush) 
          {
            GdiGradientFill gps = fillPaint.PaintFill as GdiGradientFill;
            
            graphics.SetClip(gps.GetRadialGradientRegion(gp.GetBounds()), CombineMode.Exclude);

            SolidBrush tempBrush = new SolidBrush(((PathGradientBrush)brush).InterpolationColors.Colors[0]);
            graphics.FillPath(this, tempBrush,gp);
            tempBrush.Dispose();
            graphics.ResetClip();
          }

          graphics.FillPath(this, brush, gp);
          brush.Dispose();
                    brush = null;
        }

        if (pen != null) 
        {
          if (pen.Brush is PathGradientBrush) 
          {
            GdiGradientFill gps = strokePaint.PaintFill as GdiGradientFill;
            GdiGraphicsContainer container = graphics.BeginContainer();

            graphics.SetClip(gps.GetRadialGradientRegion(gp.GetBounds()), CombineMode.Exclude);

            SolidBrush tempBrush = new SolidBrush(((PathGradientBrush)pen.Brush).InterpolationColors.Colors[0]);
            Pen tempPen = new Pen(tempBrush, pen.Width);
            graphics.DrawPath(this, tempPen,gp);
            tempPen.Dispose();
            tempBrush.Dispose();

            graphics.EndContainer(container);
          }

          graphics.DrawPath(this, pen, gp);
          pen.Dispose();
                    pen = null;
        }

                gp.Dispose();
                gp = null;
      }

      PaintMarkers(renderer, styleElm, graphics);
        }

        #endregion

        #region Private Methods

        private Brush GetBrush(GraphicsPath gp)
        {
            GdiSvgPaint paint = new GdiSvgPaint(element as SvgStyleableElement, "fill");
            return paint.GetBrush(gp);
        }

        private Pen GetPen(GraphicsPath gp)
        {
            GdiSvgPaint paint = new GdiSvgPaint(element as SvgStyleableElement, "stroke");
            return paint.GetPen(gp);
        }
    
        #endregion
    }
}