PDFsharp & MigraDoc Foundation

// Add a new Image constructor that takes a MemoryStream.
public Image(MemoryStream imageStream) : this()
{
    ImageSteam = imageStream;   // Added new property to hold the stream
   FileName = String.Empty;         // When no filename, we'll look for the stream.
}

// for convenience, added Image class property to indicate whether this image is file or stream
public bool StreamBased
{
    get { return ImageStream != null; }
}

// Altered Image.GetFilePath to return string.empty if the image is StreamBased.
// ---------------------------------------------------------------------

///Another file I needed to make changes to was in the ImageRenderer class  (ImageRenderer.cs)

1)  internal override void Format(Area area, FormatInfo previousFormatInfo)   needed to be altered slightly
     only perform the "does a bit of searching to try to locate the image" behavior when we're a file based image

2) in the Render() method, we needed to add a conditional for when image is StreamBased.
      if (image.StreamBased)
         xImage = XImage.FromStream(image.ImageStream)     <<-- XImage already knows how to load from stream so call it!
      else
          xImage = XImage.FromFile(formatInfo.ImagePath)

3) Exact same thing in the CalculateImageDimensions() method.

            // byte[] jpegdata contains the jpeg image
            using (MemoryStream ms = new MemoryStream(jpegdata)) {
                using (Image img = Image.FromStream(ms)) {
                    using (var xi = XImage.FromGdiPlusImage(img)) {
                        _pdfGfx.DrawImage(xi, ip.dx, ip.dy, ip.dw, ip.dh);
                    }
                }
            }