private void DrawToSession([CanBeNull] CanvasDrawingSession g, DPoint[] strokeToRender, [NotNull] Quad clipRegion, double zoom, bool dim = false)
{
try
{
var pts = strokeToRender;
if (pts == null || pts.Length < 1)
{
return;
}
// using the ink infrastructure for drawing...
var strokes = new List <InkStroke>();
var attr = GetPenAttributes(zoom, pts);
if (dim)
{
attr.Color = Color.FromArgb(255, 127, 127, 127);
}
var s = new CoreIncrementalInkStroke(attr, Matrix3x2.Identity);
for (int i = 0; i < pts.Length; i++)
{
var current = pts[i];
s.AppendInkPoints(new[] {
new InkPoint(new Point((current.X - clipRegion.X) * zoom, (current.Y - clipRegion.Y) * zoom), (float)current.Pressure)
});
}
var stroke = s.CreateInkStroke();
if (stroke == null)
{
throw new Exception("Stroke creation failed");
}
strokes.Add(stroke);
g?.DrawInk(strokes); // this call can be *very* slow! It's bad when using wide strokes at high zoom levels.
}
catch (Exception ex)
{
Logging.WriteLogMessage(ex.ToString());
}
}
private async Task <StorageFile> ExportCanvasAndImageAsync(StorageFile imageFile)
{
var saveFile = await GetImageToSaveAsync();
if (saveFile == null)
{
return(null);
}
// Prevent updates to the file until updates are finalized with call to CompleteUpdatesAsync.
CachedFileManager.DeferUpdates(saveFile);
using (var outStream = await saveFile.OpenAsync(FileAccessMode.ReadWrite))
{
var device = CanvasDevice.GetSharedDevice();
CanvasBitmap canvasbitmap;
using (var stream = await imageFile.OpenAsync(FileAccessMode.Read))
{
canvasbitmap = await CanvasBitmap.LoadAsync(device, stream);
}
using (var renderTarget = new CanvasRenderTarget(device, (int)_inkCanvas.Width, (int)_inkCanvas.Height, canvasbitmap.Dpi))
{
using (CanvasDrawingSession ds = renderTarget.CreateDrawingSession())
{
ds.DrawImage(canvasbitmap, new Rect(0, 0, (int)_inkCanvas.Width, (int)_inkCanvas.Height));
ds.DrawInk(_strokesService.GetStrokes());
}
await renderTarget.SaveAsync(outStream, CanvasBitmapFileFormat.Png);
}
}
// Finalize write so other apps can update file.
FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(saveFile);
return(saveFile);
}
public void Render(CanvasDrawingSession session, IEnumerable <InkStroke> strokes)
{
session.Clear(Colors.White);
session.DrawInk(strokes, false);
}
private void DrawStrokesToInkSurface(CanvasDrawingSession ds, IList <InkStroke> strokes)
{
ds.DrawInk(strokes);
}
public void Render(CanvasDrawingSession drawingSession, Matrix3x2 displayTransform, bool isHighContrast)
{
SetDisplayTransform(displayTransform);
drawingSession.DrawInk(new InkStroke[] { Stroke }, isHighContrast);
}
