private async Task SaveStrokesToBitmap(WriteableBitmap b)
{
Rect imgRect = new Rect(0, 0, b.PixelWidth, b.PixelHeight);
InkStrokeContainer container = TheInkCanvas.InkPresenter.StrokeContainer;
InkStrokeBuilder builder = new InkStrokeBuilder();
// Unsichtbare Tinte!
InkDrawingAttributes da = TheInkCanvas.InkPresenter.CopyDefaultDrawingAttributes();
da.Size = new Size(0.1, 0.1);
builder.SetDefaultDrawingAttributes(da);
// Strich in oberer linker Ecke einfügen
InkStroke topLeft = builder.CreateStroke(new List<Point>() {
new Point(1, 1),
new Point(2, 2) });
container.AddStroke(topLeft);
// Strich in unterer Rechter Ecke einfügen
InkStroke bottomRight = builder.CreateStroke(new List<Point>() {
new Point(imgRect.Width -2, imgRect.Height -2),
new Point(imgRect.Width -1, imgRect.Height -1) });
container.AddStroke(bottomRight);
// Striche in WriteableBitmap speichern
WriteableBitmap bmp;
using (InMemoryRandomAccessStream ims =
new InMemoryRandomAccessStream())
{
await container.SaveAsync(ims);
bmp = await new WriteableBitmap(1, 1)
.FromStream(ims, BitmapPixelFormat.Bgra8);
}
// Bilder zusammenfügen
b.Blit(imgRect, bmp, imgRect, WriteableBitmapExtensions.BlendMode.Alpha);
}
public void DrawInkDoesNotModifyContextState()
{
Point[] points =
{
new Point(0, 0),
new Point(100, 100),
};
var strokeBuilder = new InkStrokeBuilder();
var stroke1 = strokeBuilder.CreateStroke(points);
strokeBuilder.SetDefaultDrawingAttributes(new InkDrawingAttributes
{
Color = Colors.Yellow,
DrawAsHighlighter = true
});
var stroke2 = strokeBuilder.CreateStroke(points);
using (var device = new CanvasDevice())
using (var target = new CanvasCommandList(device))
using (var drawingSession = target.CreateDrawingSession())
{
var originalProperties = GetPropertyValues(drawingSession);
drawingSession.DrawInk(new InkStroke[] { stroke1 });
var propertiesAfterDraw1 = GetPropertyValues(drawingSession);
drawingSession.DrawInk(new InkStroke[] { stroke2 });
var propertiesAfterDraw2 = GetPropertyValues(drawingSession);
CollectionAssert.AreEqual(originalProperties, propertiesAfterDraw1);
CollectionAssert.AreEqual(originalProperties, propertiesAfterDraw2);
}
}
private async void ShareStorageItemsHandler(DataTransferManager sender, DataRequestedEventArgs e)
{
DataRequest request = e.Request;
request.Data.Properties.Title = "Exemplo de compartilhamento";
request.Data.Properties.Description = "Demonstração de como compartilhar imagem no windows 10";
DataRequestDeferral deferral = request.GetDeferral();
StorageFile arquivo = await KnownFolders.PicturesLibrary.CreateFileAsync("comp.png", CreationCollisionOption.ReplaceExisting);
InkStrokeBuilder isb = new InkStrokeBuilder();
if (null != arquivo)
{
using (var stream = await arquivo.OpenAsync(FileAccessMode.ReadWrite))
{
try
{
await areaDesenho.InkPresenter.StrokeContainer.SaveAsync(stream);
}
catch (Exception ex)
{
MessageDialog md = new MessageDialog(ex.ToString());
await md.ShowAsync();
}
}
try
{
request.Data.SetBitmap(RandomAccessStreamReference.CreateFromFile(arquivo));
}
catch(Exception ex)
{
MessageDialog md = new MessageDialog(ex.ToString());
await md.ShowAsync();
}
finally
{
deferral.Complete();
}
}
}
public static InkStroke ToInkStroke(this Stroq source, double stepX = 1, double stepY = 1, double offsetX = 0,
double offsetY = 0)
{
if (source.Points.Count == 0)
return null;
var builder = new InkStrokeBuilder();
return builder.CreateStroke(source.Points);
}
public static InkStroke ToInkStroke(this TimeSeries source, double stepX = 1, double stepY = 1, double offsetX = 0, double offsetY = 0)
{
var points = new List<Point>();
for (var i = 0; i < source.Values.Count; i++)
{
points.Add(new Point(offsetX + stepX * i, offsetY + (1 - source.Values[i]) * stepY));
}
var builder = new InkStrokeBuilder();
return builder.CreateStroke(points);
}