/// <summary>
/// 浮水印跟頁面一樣大
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkFitPage(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
//var text = new FormattedText(arg.Watermark);
var defaultTextState = new TextState("MingLiU");
var stamp = new TextStamp(arg.Watermark, defaultTextState);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = arg.WatermarkHorizontalSpace;
stamp.YIndent = arg.WatermarkVerticalSpace;
stamp.Opacity = arg.Opacity;
stamp.Width = pdfPage.CropBox.Width;
stamp.Height = pdfPage.CropBox.Height;
pdfPage.AddStamp(stamp);
}
private void AddWatermarkToPage(double pWidth, double pHeight, Aspose.Pdf.Page pg, string sUserName, string sTextDate)
{
//try{
// DeleteExistingWatermarks(pg);
//}catch {
//}
double alfaR = 30;
double c = pWidth / pHeight;
double alfa = Math.Atan(c);
alfaR = (alfa * 180) / Math.PI;
FormattedText wtext = new FormattedText("Confidential", new FontColor(220, 20, 60), new FontColor(255, 255, 255),
Aspose.Pdf.Facades.FontStyle.HelveticaBold,
EncodingType.Winansi, true, 35);
wtext.AddNewLineText("Downloaded by");
wtext.AddNewLineText(sUserName.Length > 55 ? sUserName.Substring(0, 55) : sUserName);
wtext.AddNewLineText(sTextDate.Length > 19 ? sTextDate.Substring(0, 19) : sTextDate);
TextStamp wStamp = new TextStamp(wtext);
wStamp.TextState.ForegroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Red);
wStamp.TextState.FontStyle = FontStyles.Bold;
wStamp.TextState.FontSize = 35;
wStamp.HorizontalAlignment = HorizontalAlignment.Center;
wStamp.VerticalAlignment = VerticalAlignment.Center;
wStamp.TextAlignment = HorizontalAlignment.Center;
wStamp.Opacity = .15F;
wStamp.RotateAngle = (float)(alfaR - 90);
pg.AddStamp(wStamp);
}
/// <summary>
/// 依 浮水印 水平地蓋滿整個頁面
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkRepeatHorizontal(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
if (arg.WatermarkHeight < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkHeight)} must greater than {minValue}");
}
if (arg.WatermarkWidth < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkWidth)} must greater than {minValue}");
}
//var text = new FormattedText(arg.Watermark);
var yIndent = pdfPage.CropBox.Height - arg.WatermarkHeight;
var yLimit = 0 - (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
var pageWidth = pdfPage.CropBox.Width;
var xIndent = 0d;
while (yIndent > yLimit)
{
while (xIndent < pageWidth)
{
var defaultTextState = new TextState("MingLiU");
var stamp = new TextStamp(arg.Watermark, defaultTextState);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = yIndent;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
}
xIndent = 0;
var yIdentReduce = (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
yIndent -= yIdentReduce;
}
}
/// <summary>
/// 以角度線性期function來呈現
/// </summary>
/// <param name="pdfPage"></param>
/// <param name="arg"></param>
private static void AddWatermarkRepeatRotateAngle(Aspose.Pdf.Page pdfPage, WatermarkArg arg)
{
if (arg.WatermarkHeight < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkHeight)} must greater than {minValue}");
}
if (arg.WatermarkWidth < minValue)
{
throw new ArgumentException($"{nameof(arg.WatermarkWidth)} must greater than {minValue}");
}
var text = new FormattedText(arg.Watermark);
var yIndent = pdfPage.CropBox.Height - arg.WatermarkHeight;
var yLimit = 0 - (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
var pageWidth = pdfPage.CropBox.Width;
var pageHeight = pdfPage.CropBox.Height;
var xIndent = 0d;
while (yIndent > yLimit)
{
var y = yIndent;
while (xIndent < pageWidth && y < pageHeight)
{
var stamp = new TextStamp(text);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = y;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
xIndent = xIndent + Math.Cos(30) * arg.WatermarkWidth;
y = y + Math.Sign(30) * (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
}
xIndent = 0;
var yIdentReduce = (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
yIndent -= yIdentReduce;
}
//到底了，要再連走 X
var baseX = 0d;
while (baseX < pageWidth)
{
var y = yIndent;
xIndent = baseX;
while (xIndent < pageWidth)
{
var stamp = new TextStamp(text);
stamp.RotateAngle = arg.RotateAngle;
stamp.XIndent = xIndent;
stamp.YIndent = y;
stamp.Opacity = arg.Opacity;
stamp.Width = arg.WatermarkWidth;
stamp.Height = arg.WatermarkHeight;
pdfPage.AddStamp(stamp);
xIndent += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);
xIndent = xIndent + Math.Cos(30) * arg.WatermarkWidth;
y = y + Math.Sign(30) * (arg.WatermarkHeight + arg.WatermarkVerticalSpace);
}
baseX += (arg.WatermarkWidth + arg.WatermarkHorizontalSpace);;
}
}