public void Stamp(ThumbnailSheetCreateRequest request, string filePath, TimeSpan time)
{
var stampText = time.ToString(request.VideoDurationInSeconds >= 3600 ? @"hh\:mm\:ss" : @"mm\:ss");
var tempFilePath = filePath + ".tmp.png";
using (var imgText = new MagickImage(filePath))
{
var drawable = new DrawableText(5, 5, stampText);
var gravity = new DrawableGravity(Gravity.Southeast);
var font = new DrawableFont("Tahoma");
var antialias = new DrawableTextAntialias(true);
var size = new DrawableFontPointSize(48);
var color = new DrawableFillColor(MagickColors.Black);
var strokecolor = new DrawableStrokeColor(MagickColors.AliceBlue);
imgText.Draw(drawable, gravity, font, antialias, size, color, strokecolor);
imgText.Write(tempFilePath);
}
File.Delete(filePath);
File.Move(tempFilePath, filePath);
}
public static string AddTextToImage(string imageFile, string text)
{
var image = new MagickImage(imageFile);
using (var imgText = new MagickImage())
{
var drawable = new DrawableText(0, 10, text);
var gravity = new DrawableGravity(Gravity.North);
var font = new DrawableFont("Arial");
var antialias = new DrawableTextAntialias(true);
var size = new DrawableFontPointSize(50);
var color = new DrawableFillColor(Color.Snow);
var strokeColor = new DrawableStrokeColor(Color.OrangeRed);
image.Draw(drawable, gravity, font, antialias, size, color, strokeColor);
}
// Save the result
string outputImage = TempFolder + "\\waterMark_" + Path.GetFileName(imageFile);
image.Write(outputImage);
return(outputImage);
}
private static TextSize DrawText(MagickImage image, string line, double[] spaces, double offsetX, double offsetY, Gravity position, bool measureOnly)
{
if (string.IsNullOrWhiteSpace(line))
{
return(new TextSize(0d, 0d));
}
image.Settings.TextAntiAlias = true;
// image.Settings.TextInterwordSpacing = 0;
// image.Settings.TextInterlineSpacing = 0;
if (spaces == null || spaces.Length == 0)
{
if (!measureOnly)
{
var gravity = new DrawableGravity(position);
var drawable = new DrawableText(offsetX, offsetY, line);
image.Draw(drawable, gravity);
}
var metrics = Measure(image, line);
return(new TextSize(metrics.TextWidth, metrics.Ascent - metrics.Descent));
}
else
{
var words = line.Split(' ');
var metrics = words.Select(x => Measure(image, x, true)).ToArray();
var totalSpace = words.Take(words.Length - 1).Select((x, i) => i < spaces.Length ? spaces[i] : spaces.LastOrDefault()).Sum();
var totalWidth = metrics.Select(x => x.TextWidth).Sum() + totalSpace;
var totalHeight = metrics.Select(x => x.Ascent - x.Descent).Max();
if (!measureOnly)
{
double currentX, currentY;
switch (position)
{
case Gravity.West:
case Gravity.Northwest:
case Gravity.Southwest:
case Gravity.Undefined:
currentX = offsetX;
break;
case Gravity.North:
case Gravity.Center:
case Gravity.South:
currentX = image.Width / 2d - totalWidth / 2 + offsetX;
break;
case Gravity.East:
case Gravity.Northeast:
case Gravity.Southeast:
currentX = image.Width - totalWidth - offsetX;
break;
default:
currentX = 0d;
break;
}
switch (position)
{
case Gravity.Northwest:
case Gravity.North:
case Gravity.Northeast:
case Gravity.Undefined:
currentY = offsetY;
break;
case Gravity.West:
case Gravity.Center:
case Gravity.East:
currentY = image.Height / 2d - totalHeight / 2 + offsetY;
break;
case Gravity.Southwest:
case Gravity.South:
case Gravity.Southeast:
currentY = image.Height - totalHeight - offsetY;
break;
default:
currentY = 0d;
break;
}
var gravity = new DrawableGravity(Gravity.Northwest);
for (var i = 0; i < words.Length; i++)
{
if (!string.IsNullOrWhiteSpace(words[i]))
{
image.Draw(new DrawableText(currentX, currentY, words[i]), gravity);
}
currentX += metrics[i].TextWidth + (i < spaces.Length ? spaces[i] : spaces.LastOrDefault());
}
}
return(new TextSize(totalWidth, totalHeight));
}
}
