public static Bitmap AddWatermark(Bitmap srcBitmap, string watermarkPath, WatermarkPositionType positionType)
{
using (Bitmap watermarkBitmap = new Bitmap(System.Drawing.Image.FromFile(watermarkPath)))
{
int posX = 0, posY = 0;
int offsetX = 5, offsetY = 5;
int srcWidth = srcBitmap.Width;
int srcHeight = srcBitmap.Height;
int watermarkWidth = watermarkBitmap.Width;
int watermarkHeight = watermarkBitmap.Height;
switch (positionType)
{
case WatermarkPositionType.TopLeft:
posX = offsetX;
posY = offsetY;
break;
case WatermarkPositionType.TopCenter:
posX = srcWidth / 2 - watermarkWidth / 2;
posY = offsetY;
break;
case WatermarkPositionType.TopRight:
posX = srcWidth - watermarkWidth - offsetX;
posY = offsetY;
break;
case WatermarkPositionType.Center:
posX = srcWidth / 2 - watermarkWidth / 2;
posY = srcHeight / 2 - watermarkHeight / 2;
break;
case WatermarkPositionType.BottomLeft:
posX = offsetX;
posY = srcHeight - watermarkHeight - offsetY;
break;
case WatermarkPositionType.BottomCenter:
posX = srcWidth / 2 - watermarkWidth / 2;
posY = srcHeight - watermarkHeight - offsetY;
break;
case WatermarkPositionType.BottomRight:
posX = srcWidth - watermarkWidth - offsetX;
posY = srcHeight - watermarkHeight - offsetY;
break;
default:
throw new ArgumentOutOfRangeException("positionType");
}
return(AddWatermark(srcBitmap, posX, posY, watermarkBitmap, 0.2f));
}
}
protected static Point FindPosition(WatermarkPositionType positionType, int offset, Size img, Size img2, int add)
{
Point position;
switch (positionType)
{
case WatermarkPositionType.TOP_LEFT:
position = new Point(offset, offset);
break;
case WatermarkPositionType.TOP_RIGHT:
position = new Point(img.Width - img2.Width - offset - add, offset);
break;
case WatermarkPositionType.BOTTOM_LEFT:
position = new Point(offset, img.Height - img2.Height - offset - add);
break;
case WatermarkPositionType.BOTTOM_RIGHT:
position = new Point(img.Width - img2.Width - offset - add, img.Height - img2.Height - offset - add);
break;
case WatermarkPositionType.CENTER:
position = new Point(img.Width / 2 - img2.Width / 2 - add, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.LEFT:
position = new Point(offset, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.TOP:
position = new Point(img.Width / 2 - img2.Width / 2 - add, offset);
break;
case WatermarkPositionType.RIGHT:
position = new Point(img.Width - img2.Width - offset - add, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.BOTTOM:
position = new Point(img.Width / 2 - img2.Width / 2 - add, img.Height - img2.Height - offset - add);
break;
default:
position = Point.Empty;
break;
}
return(position);
}
protected static Point FindPosition(WatermarkPositionType positionType, int offset, Size img, Size img2, int add)
{
Point position;
switch (positionType)
{
case WatermarkPositionType.TOP_LEFT:
position = new Point(offset, offset);
break;
case WatermarkPositionType.TOP_RIGHT:
position = new Point(img.Width - img2.Width - offset - add, offset);
break;
case WatermarkPositionType.BOTTOM_LEFT:
position = new Point(offset, img.Height - img2.Height - offset - add);
break;
case WatermarkPositionType.BOTTOM_RIGHT:
position = new Point(img.Width - img2.Width - offset - add, img.Height - img2.Height - offset - add);
break;
case WatermarkPositionType.CENTER:
position = new Point(img.Width / 2 - img2.Width / 2 - add, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.LEFT:
position = new Point(offset, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.TOP:
position = new Point(img.Width / 2 - img2.Width / 2 - add, offset);
break;
case WatermarkPositionType.RIGHT:
position = new Point(img.Width - img2.Width - offset - add, img.Height / 2 - img2.Height / 2 - add);
break;
case WatermarkPositionType.BOTTOM:
position = new Point(img.Width / 2 - img2.Width / 2 - add, img.Height - img2.Height - offset - add);
break;
default:
position = Point.Empty;
break;
}
return position;
}
