public static void Run()
{
File file = new File("my-image", ".pdf");
IFileHandler rootOfChain = new JpegHandler();
IFileHandler pngHandler = new PngHandler();
IFileHandler pdfHandler = new PdfHandler();
rootOfChain.SetNext(pngHandler);
pngHandler.SetNext(pdfHandler);
rootOfChain.Handle(file);
}
/// <summary>
/// Adds the JPEG image represented by the input stream at the specified location.
/// </summary>
public AddedImage AddJpeg(Stream fileStream, PdfRectangle placementRectangle)
{
var startFrom = fileStream.Position;
var info = JpegHandler.GetInformation(fileStream);
byte[] data;
using (var memory = new MemoryStream())
{
fileStream.Seek(startFrom, SeekOrigin.Begin);
fileStream.CopyTo(memory);
data = memory.ToArray();
}
var imgDictionary = new Dictionary <NameToken, IToken>
{
{ NameToken.Type, NameToken.Xobject },
{ NameToken.Subtype, NameToken.Image },
{ NameToken.Width, new NumericToken(info.Width) },
{ NameToken.Height, new NumericToken(info.Height) },
{ NameToken.BitsPerComponent, new NumericToken(info.BitsPerComponent) },
{ NameToken.ColorSpace, NameToken.Devicergb },
{ NameToken.Filter, NameToken.DctDecode },
{ NameToken.Length, new NumericToken(data.Length) }
};
var reference = documentBuilder.AddImage(new DictionaryToken(imgDictionary), data);
if (!resourcesDictionary.TryGetValue(NameToken.Xobject, out var xobjectsDict) ||
!(xobjectsDict is DictionaryToken xobjects))
{
xobjects = new DictionaryToken(new Dictionary <NameToken, IToken>());
resourcesDictionary[NameToken.Xobject] = xobjects;
}
var key = NameToken.Create($"I{imageKey++}");
resourcesDictionary[NameToken.Xobject] = xobjects.With(key, new IndirectReferenceToken(reference));
operations.Add(Push.Value);
// This needs to be the placement rectangle.
operations.Add(new ModifyCurrentTransformationMatrix(new []
{
(decimal)placementRectangle.Width, 0,
0, (decimal)placementRectangle.Height,
(decimal)placementRectangle.BottomLeft.X, (decimal)placementRectangle.BottomLeft.Y
}));
operations.Add(new InvokeNamedXObject(key));
operations.Add(Pop.Value);
return(new AddedImage(reference, info.Width, info.Height));
}
