/// <summary>
/// Adds a watermark icon to an image and saves it to a new file.
/// </summary>
/// <param name="originalImageFilePath">Path to the image that will get a watermark.</param>
/// <param name="watermarkFilePath">Path to the image with the watermark.</param>
/// <param name="outputFilePath">Path where the watermarked image will be created.</param>
/// <param name="position">The position of the watermark on the image.</param>
public static void AddWatermarkIcon(string originalImageFilePath,
string watermarkFilePath,
string outputFilePath,
PositionInImage position)
{
Image img = Image.FromFile(originalImageFilePath);
Image watermark = Image.FromFile(watermarkFilePath);
int x = 0;
int y = 0;
switch (position)
{
case PositionInImage.TopLeft:
x = 0;
y = 0;
break;
case PositionInImage.TopRight:
x = img.Width - watermark.Width;
y = 0;
break;
case PositionInImage.BottomLeft:
x = 0;
y = img.Height - watermark.Height;
break;
case PositionInImage.BottomRight:
x = img.Width - watermark.Width;
y = img.Height - watermark.Height;
break;
}
using (var g = Graphics.FromImage(img))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.DrawImage(watermark, x, y, watermark.Width, watermark.Height);
}
img.Save(outputFilePath);
}
/// <summary>
/// Adds a watermark text to the right bottom corner of an image.
/// </summary>
/// <param name="filePath">The filepath to the image.</param>
/// <param name="value">The text to write as watermark.</param>
/// <param name="position">The position of the text on the image.</param>
public static void AddWatermarkString(string filePath,
string value,
string outputPath,
PositionInImage position)
{
Image img = Image.FromFile(filePath);
using (var g = Graphics.FromImage(img))
{
Font f = new Font("Calibri", 15);
Brush b = new SolidBrush(Color.Black);
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
int x = 15;
int y = 15;
switch (position)
{
case PositionInImage.TopLeft:
break;
case PositionInImage.TopRight:
x = img.Width - (int)Math.Ceiling(g.MeasureString(value, f).Width);
break;
case PositionInImage.BottomLeft:
y = img.Height - 25;
break;
case PositionInImage.BottomRight:
x = img.Width - (int)Math.Ceiling(g.MeasureString(value, f).Width);
y = img.Height - 25;
break;
}
g.DrawString(value, f, b, x, y);
}
img.Save(outputPath);
}
