/// <summary>
/// Reads a Quill project folder and imports it in a Sequence object.
/// A project consists in a json-based scene hierarchy, a json-based state file, and binary data.
/// </summary>
public static Sequence Read(string path)
{
if (string.IsNullOrEmpty(path) || !Directory.Exists(path))
{
return(null);
}
string sequenceFilename = Path.Combine(path, "Quill.json");
string paintDataFilename = Path.Combine(path, "Quill.qbin");
if (!File.Exists(sequenceFilename) || !File.Exists(paintDataFilename))
{
return(null);
}
Sequence seq = null;
try
{
string json = File.ReadAllText(sequenceFilename);
dynamic document = JsonConvert.DeserializeObject(json);
seq = Parse(document);
}
catch (JsonReaderException e)
{
// The JSON is invalid.
// This happened sometimes in the early days of Quill when the transforms exploded and "inf" or "nan" was written in the matrix array.
Console.WriteLine("JSON parsing error: {0}", e.Message);
}
catch (Exception e)
{
Console.WriteLine("Error during the parsing of the Quill.json document: {0}", e.Message);
}
if (seq == null)
{
return(null);
}
// Now that we have loaded the scene hierarchy, read the actual attached data from the qbin.
using (Stream stream = File.OpenRead(paintDataFilename))
{
QBinReader qbinReader = new QBinReader(stream);
seq.LastStrokeId = qbinReader.ReadUInt32();
ReadLayerData(seq.RootLayer, qbinReader);
}
return(seq);
}
/// <summary>
/// Recursive function reading binary data for the entire hierarchy.
/// </summary>
private static void ReadLayerData(Layer layer, QBinReader qbinReader)
{
if (layer.Type == LayerType.Group)
{
foreach (Layer l in ((LayerGroup)layer).Children)
{
ReadLayerData(l, qbinReader);
}
}
else if (layer.Type == LayerType.Paint)
{
foreach (Drawing drawing in ((LayerPaint)layer).Drawings)
{
qbinReader.BaseStream.Seek(drawing.DataFileOffset, SeekOrigin.Begin);
drawing.Data = qbinReader.ReadDrawingData();
}
}
}