public static byte[] SaveInkCanvasToJpg(InkCanvas canvas, int quality)
{
canvas.UpdateLayout();
Size sizet = new Size();
canvas.Arrange(new Rect(sizet));
Size size = new Size(canvas.ActualWidth, canvas.ActualHeight);
canvas.Margin = new Thickness(0, 0, 0, 0);
canvas.Measure(size);
canvas.Arrange(new Rect(size));
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.QualityLevel = quality;
RenderTargetBitmap bitmapTarget = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Default);
bitmapTarget.Render(canvas);
encoder.Frames.Add(BitmapFrame.Create(bitmapTarget));
MemoryStream ms = new MemoryStream();
encoder.Save(ms);
return(ms.ToArray());
}
public void Clear()
{
canvasSignaturePad.Strokes.Clear();
canvasSignaturePad.UpdateLayout();
lStroke.Clear();
}
internal BitmapSource GetBitmap(Orientation?orientation)
{
InkCanvas inkCanvas = new InkCanvas
{
Background = System.Windows.Media.Brushes.White
};
if (this.StrokeData != null)
{
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.Write(this.StrokeData, 0, this.StrokeData.Length);
memoryStream.Seek(0, SeekOrigin.Begin);
StrokeCollection collection = new StrokeCollection(memoryStream);
inkCanvas.Strokes = collection;
}
}
foreach (Stroke stroke in inkCanvas.Strokes)
{
stroke.DrawingAttributes.Color = stroke.DrawingAttributes.Color == Colors.White ? Colors.Black : stroke.DrawingAttributes.Color == Colors.LightGray ? Colors.Black : stroke.DrawingAttributes.Color;
}
System.Windows.Point bottomRightCorner = new System.Windows.Point(1, 1);
foreach (Stroke stroke in inkCanvas.Strokes)
{
Rect bounds = stroke.GetBounds();
if (bounds.Right > bottomRightCorner.X)
{
bottomRightCorner.X = bounds.Right + 1;
}
if (bounds.Bottom > bottomRightCorner.Y)
{
bottomRightCorner.Y = bounds.Bottom + 1;
}
}
double scale = 3;
inkCanvas.Width = bottomRightCorner.X * scale;
inkCanvas.Height = bottomRightCorner.Y * scale;
inkCanvas.Measure(inkCanvas.RenderSize);
inkCanvas.Arrange(new Rect(0, 0, bottomRightCorner.X, bottomRightCorner.Y));
inkCanvas.UpdateLayout();
RenderTargetBitmap bitmap = new RenderTargetBitmap(
(int)inkCanvas.RenderSize.Width,
(int)inkCanvas.RenderSize.Height,
96 * scale,
96 * scale,
PixelFormats.Pbgra32);
bitmap.Render(inkCanvas);
bitmap.Freeze();
if (bottomRightCorner.X > bottomRightCorner.Y && orientation.GetValueOrDefault(Orientation.Horizontal) == Orientation.Vertical ||
bottomRightCorner.Y > bottomRightCorner.X && orientation.GetValueOrDefault(Orientation.Horizontal) == Orientation.Horizontal)
{
return(new TransformedBitmap(bitmap, new RotateTransform(90)));
}
return(bitmap);
}