public void SendStrokeInChunks(Guid strokeId, List <InkPoint> points, InkDrawingAttributes drawingAttributes, Action <byte[]> sendAction)
{
var isFirstChunk = true;
var chunksOfPoints = ChunksOfPoints(points, ChunkSize).ToList();
for (short i = 0; i < chunksOfPoints.Count; i++)
{
var chunk = chunksOfPoints[i];
StrokePoints strokePoints;
if (isFirstChunk)
{
strokePoints = new StrokeDescription
{
IsPencil = drawingAttributes.Kind == InkDrawingAttributesKind.Pencil,
DrawAsHighlighter = drawingAttributes.DrawAsHighlighter,
ColorValues = new[] { drawingAttributes.Color.A, drawingAttributes.Color.R, drawingAttributes.Color.G, drawingAttributes.Color.B },
FitToCurve = drawingAttributes.FitToCurve,
IgnorePressure = drawingAttributes.IgnorePressure,
SizeValues = new[] { drawingAttributes.Size.Width, drawingAttributes.Size.Height },
Opacity = drawingAttributes.PencilProperties?.Opacity ?? 1.0
};
isFirstChunk = false;
}
else
{
strokePoints = new StrokePoints();
}
strokePoints.Id = strokeId;
strokePoints.Order = i;
strokePoints.NumberOfPackages = (short)chunksOfPoints.Count;
strokePoints.PointXValues = chunk.Select(p => p.Position.X).ToArray();
strokePoints.PointYValues = chunk.Select(p => p.Position.Y).ToArray();
strokePoints.PressureValues = chunk.Select(p => p.Pressure).ToArray();
byte[] protobuf;
using (var stream = new MemoryStream())
{
Serializer.Serialize(stream, strokePoints);
protobuf = stream.ToArray();
}
var compressedProtobuf = protobuf.Compress();
sendAction(compressedProtobuf);
}
}
private async void StrokeChangeBrokerOnStrokeCollected(object sender, StrokeDescription strokeDescription)
{
if (idToStrokeMapping.ContainsKey(strokeDescription.Id))
{
return;
}
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
lock (canvasChangeLock)
{
InkDrawingAttributes inkDrawingAttributes;
if (strokeDescription.IsPencil)
{
inkDrawingAttributes = InkDrawingAttributes.CreateForPencil();
inkDrawingAttributes.PencilProperties.Opacity = strokeDescription.Opacity;
}
else
{
inkDrawingAttributes = new InkDrawingAttributes();
inkDrawingAttributes.DrawAsHighlighter = strokeDescription.DrawAsHighlighter;
}
inkDrawingAttributes.Color = Color.FromArgb(strokeDescription.ColorValues[0], strokeDescription.ColorValues[1], strokeDescription.ColorValues[2], strokeDescription.ColorValues[3]);
inkDrawingAttributes.FitToCurve = strokeDescription.FitToCurve;
inkDrawingAttributes.IgnorePressure = strokeDescription.IgnorePressure;
inkDrawingAttributes.Size = new Size(strokeDescription.SizeValues[0], strokeDescription.SizeValues[1]);
strokeBuilder.SetDefaultDrawingAttributes(inkDrawingAttributes);
var points = new List <InkPoint>(strokeDescription.PointXValues.Length);
for (var i = 0; i < strokeDescription.PointXValues.Length; i++)
{
points.Add(new InkPoint(new Point(strokeDescription.PointXValues[i], strokeDescription.PointYValues[i]), strokeDescription.PressureValues[i]));
}
var newStroke = strokeBuilder.CreateStrokeFromInkPoints(points, Matrix3x2.Identity);
idToStrokeMapping[strokeDescription.Id] = newStroke;
canvas.InkPresenter.StrokeContainer.AddStroke(newStroke);
}
});
}