public static void AddWatermarks(FileStream fs, WatermarkCollection marks, Stream outputStream)
{
Image img = Image.FromStream(fs);
Graphics gr = null;
int pad = 2;
float actualFontSize = img.Height / 1000;
//if (actualFontSize < 12)
// actualFontSize = 12;
float factor = img.Height > img.Width ? img.Height : img.Width;
if (actualFontSize < img.Height * .005)
{
actualFontSize = Convert.ToInt32(factor * .005);
}
float upperBackground = 0;
float lowerBackground = 0;
// Determine text background heights
foreach (Watermark mark in marks)
{
if (string.IsNullOrEmpty(mark.Body))
{
continue;
}
Font font = mark.TextFont;
font = new Font(font.Name, actualFontSize);
if ((mark.Location == WatermarkLocation.UpperLeft || mark.Location == WatermarkLocation.UpperRight))
{
upperBackground = font.Height * 2;
}
if ((mark.Location == WatermarkLocation.LowerLeft || mark.Location == WatermarkLocation.LowerRight))
{
lowerBackground = font.Height * 2;
}
}
try
{
gr = Graphics.FromImage(img);
gr.DrawImage(img, new Rectangle(0, 0, img.Width, img.Height));
//gr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
}
catch (Exception ex)
{
Image img1 = img;
img = new Bitmap(img1, img.Width, img.Height);
gr = Graphics.FromImage(img);
gr.DrawImage(img1, new Rectangle(0, 0, img.Width, img.Height));//, 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);
img1.Dispose();
}
// Draw text backgrounds
if (upperBackground > 0)
{
using (Brush brush = new SolidBrush(Color.FromArgb(128, 0, 0, 0)))
gr.FillRectangle(brush, 0, 0, img.Width, upperBackground + (pad * 2));
}
if (lowerBackground > 0)
{
using (Brush brush = new SolidBrush(Color.FromArgb(128, 0, 0, 0)))
gr.FillRectangle(brush, 0, img.Height - lowerBackground - (pad * 2), img.Width, lowerBackground + (pad * 2));
}
// Draw strings
foreach (Watermark mark in marks)
{
Font font = mark.TextFont;
if (img.VerticalResolution == 96)
{
actualFontSize = actualFontSize * 1.25f;
}
font = new Font(font.Name, actualFontSize);
SolidBrush sbrush = new SolidBrush(mark.TextColor);
// The position where to draw the watermark on the image
SizeF ss = gr.MeasureString(mark.Body, font);
// Lower left
Point pt = new Point(pad, img.Height - ((int)ss.Height - pad));
// Upper left
if (mark.Location == WatermarkLocation.UpperLeft)
{
pt = new Point(pad, pad);
}
// Upper right
if (mark.Location == WatermarkLocation.UpperRight)
{
pt = new Point(img.Width - ((int)ss.Width + pad), pad);
}
// Lower right
if (mark.Location == WatermarkLocation.LowerRight)
{
pt = new Point(img.Width - ((int)ss.Width + pad), img.Height - ((int)ss.Height - pad));
}
// Center
if (mark.Location == WatermarkLocation.Center)
{
pt = new Point((img.Width / 2) - (((int)ss.Width / 2)), (img.Height / 2) - (((int)ss.Height / 2)));
}
// Print
gr.DrawString(mark.Body, font, sbrush, pt);
// DEBUG gr.DrawString(Convert.ToString(actualFontSize), font, sbrush, pt);
// gr.DrawString(Convert.ToString(img.VerticalResolution), font, sbrush, pt);
}
// Cleanup
gr.Dispose();
// Save to memory stream
img.Save(outputStream, ImageFormat.Jpeg);
}