SvgImageElementGraphicsNode.cs :  » GUI » SharpVectorGraphics » SharpVectors » Renderer » Gdi » C# / CSharp Open Source

using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

using SharpVectors.Net;
using SharpVectors.Dom.Svg;
using SharpVectors.Dom.Svg.Rendering;

namespace SharpVectors.Renderer.Gdi{
  /// <summary>
  /// Summary description for SvgImageGraphicsNode.
  /// </summary>
  public class SvgImageElementGraphicsNode : GraphicsNode
  {
        #region Constructor
    public SvgImageElementGraphicsNode(SvgElement element) : base(element)
    {
    }
        #endregion

    private GdiRenderer gdiRenderer = new GdiRenderer();

    private SvgWindow getSvgWindow()
    {
      SvgImageElement iElm = Element as SvgImageElement;
      SvgWindow wnd = iElm.SvgWindow;
      wnd.Renderer = gdiRenderer;
      gdiRenderer.Window = wnd;
      return wnd;
    }

        #region Public Methods
    public override void Render(ISvgRenderer renderer)
    {
            GraphicsWrapper graphics = ((GdiRenderer) renderer).GraphicsWrapper;
      SvgImageElement iElement = (SvgImageElement) element;
      //HttpResource resource = iElement.ReferencedResource;

      /*if (resource != null )
      {*/
        ImageAttributes imageAttributes = new ImageAttributes();

        string sOpacity = iElement.GetPropertyValue("opacity");
        if ( sOpacity.Length > 0 )
        {
          double opacity = SvgNumber.ParseToFloat(sOpacity);
          ColorMatrix myColorMatrix = new ColorMatrix();
          myColorMatrix.Matrix00 = 1.00f; // Red
          myColorMatrix.Matrix11 = 1.00f; // Green
          myColorMatrix.Matrix22 = 1.00f; // Blue
          myColorMatrix.Matrix33 = (float)opacity; // alpha
          myColorMatrix.Matrix44 = 1.00f; // w

          imageAttributes.SetColorMatrix(myColorMatrix,ColorMatrixFlag.Default,ColorAdjustType.Bitmap);
        }

                float width = (float)iElement.Width.AnimVal.Value;
        float height = (float)iElement.Height.AnimVal.Value;

        Rectangle destRect = new Rectangle();
        destRect.X = Convert.ToInt32(iElement.X.AnimVal.Value);
        destRect.Y = Convert.ToInt32(iElement.Y.AnimVal.Value);
        destRect.Width = Convert.ToInt32(width);
        destRect.Height = Convert.ToInt32(height);

        Image image;
        if ( iElement.IsSvgImage )
        {
          SvgWindow wnd = getSvgWindow();
                    gdiRenderer.BackColor = Color.Empty;
          gdiRenderer.Render(wnd.Document as SvgDocument);

                    //wnd.Render();
          image = gdiRenderer.RasterImage;
          image.Save(@"c:\inlinesvg.png", ImageFormat.Png);
        }
        else
        {
          image = iElement.Bitmap;
        }

        if(image != null)
        {
          graphics.DrawImage(this, image, destRect, 0f,0f,image.Width,image.Height, GraphicsUnit.Pixel, imageAttributes);
        }
      //}
    }
        #endregion
  }
}