private static RenderTargetBitmap CreateWatermarkedBitmapEncoder(BitmapImage SourceImage, TextWatermarkListWithSerchByUiLabel Watermarks, int newPixelWidth, int newPixelHeight)
{
DrawingVisual visual = new DrawingVisual();
//resize koefficient
double kw = 1;
if (SourceImage.PixelWidth > 0)
{
kw = (double)newPixelWidth / SourceImage.PixelWidth;
}
double kh = 1;
if (SourceImage.PixelHeight > 0)
{
kh = (double)newPixelHeight / SourceImage.PixelHeight;
}
using (DrawingContext dc = visual.RenderOpen())
{
dc.DrawImage(SourceImage, new Rect(0, 0, SourceImage.PixelWidth, SourceImage.PixelHeight));
foreach (Watermark w in Watermarks)
{
//rotate drawing context
RotateTransform rt = new RotateTransform();
rt.Angle = w.angle;
rt.CenterX = 0;
rt.CenterY = 0;
dc.PushTransform(rt);
//dc.PushOpacity(w.opacity);
double op = 1 - w.opacity / 100.0;
dc.PushOpacity(op);
TextWatermark tw = (TextWatermark)w;
int x, y;
double sin, cos;
sin = Math.Sin(w.angle * Math.PI / 180.0);
cos = Math.Cos(w.angle * Math.PI / 180.0);
x = Convert.ToInt16(tw.GetPixelXlocation(SourceImage.PixelWidth) * cos + tw.GetPixelYlocation(SourceImage.PixelHeight) * sin);
y = Convert.ToInt16(-tw.GetPixelXlocation(SourceImage.PixelWidth) * sin + tw.GetPixelYlocation(SourceImage.PixelHeight) * cos);
dc.DrawText(tw.GetFormattedText(SourceImage.PixelWidth, SourceImage.PixelHeight), new Point(x, y));
dc.Pop(); //pop opacity
dc.Pop(); //pop rotation
}
}
//resize transform
visual.Transform = new ScaleTransform(kw, kh);
RenderTargetBitmap rtb = new RenderTargetBitmap(newPixelWidth, newPixelHeight, 96, 96, PixelFormats.Pbgra32);
rtb.Render(visual);
return(rtb);
}
private void AddAdornerToWatermarkLabel(TextWatermark watermark)
{
if (watermark != null)
{
AdornerLayer layer = AdornerLayer.GetAdornerLayer(watermark.UiLabelOnImageInCanvas);
WatermarkLabelAdorner a = new WatermarkLabelAdorner(watermark.UiLabelOnImageInCanvas);
a.OnDrag += TextWatermarkDragHandler;
layer.Add(a);
}
}
private void buttonLoadTemplate_Click(object sender, RoutedEventArgs e)
{
Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
dlg.FileName = "MyWatermarks";
dlg.DefaultExt = ".xml";
dlg.Filter = "Watermark templates (.xml)|*.xml";
Nullable <bool> result = dlg.ShowDialog();
if (result == true)
{
string path = dlg.FileName;
XmlSerializer reader = new XmlSerializer(typeof(TextWatermarkSerializationHelper[]));
TextWatermarkSerializationHelper[] th = null;
try
{
System.IO.StreamReader file = new System.IO.StreamReader(path);
th = (TextWatermarkSerializationHelper[])reader.Deserialize(file);
}
catch (Exception)
{ }
if (th != null)
{
RemoveAllAdornersFromLabelWatermarks();
textWatermarks = new TextWatermarkListWithSerchByUiLabel();
foreach (TextWatermarkSerializationHelper h in th)
{
System.Drawing.Color c = System.Drawing.Color.FromArgb(h.colorArgb);
TextWatermark t = new TextWatermark(h.text,
new System.Windows.Media.FontFamily(h.fontFamilyName),
System.Windows.Media.Color.FromArgb(c.A, c.R, c.G, c.B),
h.height,
h.angle,
h.opacity,
h.x,
h.y);
t.UiLabelOnImageInCanvas.MouseLeftButtonDown += WatermarkLabelOnCanvasTouched;
t.UiLabelOnImageInCanvas.Cursor = Cursors.Hand;
t.SetLabelGeometryAccordingToImageAndCanvas(imagePreview.Width, imagePreview.Height, canvasMain.ActualWidth, canvasMain.ActualHeight);
canvasMain.Children.Add(t.UiLabelOnImageInCanvas);
textWatermarks.Add(t);
}
AddAdornerToWatermarkLabel(textWatermarks[textWatermarks.Count - 1]);
tabItemTextWatermarks.DataContext = textWatermarks[textWatermarks.Count - 1];
}
}
}
private void TextWatermarkDragHandler(WatermarkLabelAdorner sender, DragOperations operation, double diffX, double diffY)
{
Label l = sender.AdornedElement as Label;
if (l == null)
{
return;
}
int i = textWatermarks.GetIndexByUiLabel(l);
if (i < 0)
{
return;
}
TextWatermark t = textWatermarks[i];
if (operation == DragOperations.Move)
{
int diffXinPercent = Convert.ToInt16((diffX / imagePreview.Width) * 100);
int diffYinPercent = Convert.ToInt16((diffY / imagePreview.Height) * 100);
t.xLocationInPercent += diffXinPercent;
t.yLocationInPercent += diffYinPercent;
}
else
if (operation == DragOperations.Rotate)
{
double ox = sender.ActualWidth * Math.Cos((t.angle) * Math.PI / 180);
double oy = sender.ActualWidth * Math.Sin((t.angle) * Math.PI / 180);
double nx = ox + diffX;
if (nx < 0)
{
if (diffY < 0)
{
t.angle = -90;
}
else
{
t.angle = 90;
}
}
else
{
double ny = oy + diffY;
double na = Math.Atan(ny / nx) * (180.0 / Math.PI);
t.angle = Convert.ToInt16(na);
}
}
}
private void AddNewWatermark()
{
RemoveAllAdornersFromLabelWatermarks();
TextWatermark t = new TextWatermark((string)Application.Current.FindResource("newWatermarkText"),
new System.Windows.Media.FontFamily("Arial"), Colors.Red, 10, 0, 70, 3, 3);
//selection
t.UiLabelOnImageInCanvas.MouseLeftButtonDown += WatermarkLabelOnCanvasTouched;
t.UiLabelOnImageInCanvas.Cursor = Cursors.Hand;
t.SetLabelGeometryAccordingToImageAndCanvas(imagePreview.Width, imagePreview.Height, canvasMain.ActualWidth, canvasMain.ActualHeight);
canvasMain.Children.Add(t.UiLabelOnImageInCanvas);
AddAdornerToWatermarkLabel(t);
textWatermarks.Add(t);
tabItemTextWatermarks.DataContext = t;
}
private void buttonDeleteWatermark_Click(object sender, RoutedEventArgs e)
{
if (textWatermarks.Count > 0)
{
//remember selected watermark label
TextWatermark foo = (TextWatermark)tabItemTextWatermarks.DataContext;
int i = textWatermarks.GetIndexByUiLabel(foo.UiLabelOnImageInCanvas);
if (i >= 0)
{
tabItemTextWatermarks.DataContext = null;
canvasMain.Children.Remove(foo.UiLabelOnImageInCanvas);
textWatermarks.Remove(textWatermarks[i]);
if (textWatermarks.Count > 0)
{
tabItemTextWatermarks.DataContext = textWatermarks[textWatermarks.Count - 1];
AddAdornerToWatermarkLabel(textWatermarks[textWatermarks.Count - 1]);
}
}
}
}