/// <summary>
///
/// </summary>
/// <param name="page"></param>
private static void DrawWatermarkWithTransparency(PDFPage page)
{
PDFBrush redBrush = new PDFBrush(new PDFRgbColor(192, 0, 0));
PDFStandardFont helvetica = new PDFStandardFont(PDFStandardFontFace.HelveticaBold, 36);
// The page graphics is located by default on top of existing page content.
//page.SetGraphicsPosition(PDFPageGraphicsPosition.OverExistingPageContent);
page.Canvas.SaveGraphicsState();
PDFStringAppearanceOptions sao = new PDFStringAppearanceOptions();
sao.Brush = redBrush;
sao.Font = helvetica;
PDFStringLayoutOptions slo = new PDFStringLayoutOptions();
slo.X = 130;
slo.Y = 670;
slo.Rotation = 60;
// Draw the watermark over page content but setting the transparency to a value lower than 1.
// The page content will be partially visible through the watermark.
PDFExtendedGraphicState gs1 = new PDFExtendedGraphicState();
gs1.FillAlpha = 0.3;
page.Canvas.SetExtendedGraphicState(gs1);
page.Canvas.DrawString("Sample watermark over page content", sao, slo);
page.Canvas.RestoreGraphicsState();
}
/// <summary>
///
/// </summary>
/// <param name="page"></param>
private static void DrawWatermarkOverPageContent(PDFPage page)
{
PDFBrush redBrush = new PDFBrush(new PDFRgbColor(192, 0, 0));
PDFStandardFont helvetica = new PDFStandardFont(PDFStandardFontFace.HelveticaBold, 32);
// The page canvas is located by default on top of existing page content.
//page.SetCanvasPosition(PDFPageCanvasPosition.OverExistingPageContent);
// Draw the watermark over page content.
// Page content under the watermark will be masked.
page.Canvas.DrawString("Sample watermark over page content", helvetica, redBrush, 20, 335);
page.Canvas.SaveGraphicsState();
// Draw the watermark over page content but using the Multiply blend mode.
// The watermak will appear as if drawn under the page content, useful when watermarking scanned documents.
// If the watermark is drawn under page content for scanned documents, it will not be visible because the scanned image will block it.
PDFExtendedGraphicState gs1 = new PDFExtendedGraphicState();
gs1.BlendMode = PDFBlendMode.Multiply;
page.Canvas.SetExtendedGraphicState(gs1);
page.Canvas.DrawString("Sample watermark over page content", helvetica, redBrush, 20, 385);
// Draw the watermark over page content but using the Luminosity blend mode.
// Both the page content and the watermark will be visible.
PDFExtendedGraphicState gs2 = new PDFExtendedGraphicState();
gs2.BlendMode = PDFBlendMode.Luminosity;
page.Canvas.SetExtendedGraphicState(gs2);
page.Canvas.DrawString("Sample watermark over page content", helvetica, redBrush, 20, 435);
page.Canvas.RestoreGraphicsState();
}
private static PDFFixedDocument CreatePDFA2uDocument(Stream iccInput, Stream ttfInput)
{
iccInput.Position = 0;
ttfInput.Position = 0;
PDFFixedDocument document = new PDFFixedDocument();
document.OptionalContentProperties = new PDFOptionalContentProperties();
// Setup the document by creating a PDF/A output intent, based on a RGB ICC profile,
// and document information and metadata
PDFIccColorSpace icc = new PDFIccColorSpace();
byte[] profilePayload = new byte[iccInput.Length];
iccInput.Read(profilePayload, 0, profilePayload.Length);
icc.IccProfile = profilePayload;
PDFOutputIntent oi = new PDFOutputIntent();
oi.Type = PDFOutputIntentType.PDFA1;
oi.Info = "sRGB IEC61966-2.1";
oi.OutputConditionIdentifier = "Custom";
oi.DestinationOutputProfile = icc;
document.OutputIntents = new PDFOutputIntentCollection();
document.OutputIntents.Add(oi);
document.DocumentInformation = new PDFDocumentInformation();
document.DocumentInformation.Author = "O2 Solutions";
document.DocumentInformation.Title = "PDF4NET PDF/A-2B/U Demo";
document.DocumentInformation.Creator = "PDF4NET PDF/A-2B/U Demo Application";
document.DocumentInformation.Producer = "PDF4NET";
document.DocumentInformation.Keywords = "pdf/a";
document.DocumentInformation.Subject = "PDF/A-2B/U Sample produced by PDF4NET";
document.XmpMetadata = new PDFXmpMetadata();
PDFPage page = document.Pages.Add();
page.Rotation = 90;
// All fonts must be embedded in a PDF/A document.
PDFStringAppearanceOptions sao = new PDFStringAppearanceOptions();
sao.Font = new PDFAnsiTrueTypeFont(ttfInput, 24, true);
sao.Brush = new PDFBrush(new PDFRgbColor(0, 0, 128));
PDFStringLayoutOptions slo = new PDFStringLayoutOptions();
slo.HorizontalAlign = PDFStringHorizontalAlign.Center;
slo.VerticalAlign = PDFStringVerticalAlign.Bottom;
slo.X = page.Width / 2;
slo.Y = page.Height / 2 - 10;
page.Canvas.DrawString("PDF4NET", sao, slo);
slo.Y = page.Height / 2 + 10;
slo.VerticalAlign = PDFStringVerticalAlign.Top;
sao.Font.Size = 14;
page.Canvas.DrawString("This is a sample PDF/A-2B/U document that shows the PDF/A-2B/U capabilities in PDF4NET library", sao, slo);
// PDF/A-2 documents support optional content and transparency.
PDFOptionalContentGroup ocgPage1 = new PDFOptionalContentGroup();
ocgPage1.Name = "Green Rectangle";
page.Canvas.BeginOptionalContentGroup(ocgPage1);
page.Canvas.SaveGraphicsState();
PDFExtendedGraphicState gs = new PDFExtendedGraphicState();
gs.FillAlpha = 0.8;
gs.StrokeAlpha = 0.2;
gs.BlendMode = PDFBlendMode.Luminosity;
page.Canvas.SetExtendedGraphicState(gs);
PDFBrush greenBrush = new PDFBrush(PDFRgbColor.DarkGreen);
PDFPen bluePen = new PDFPen(PDFRgbColor.DarkBlue, 5);
page.Canvas.DrawRectangle(bluePen, greenBrush, 20, 20, page.Width - 40, page.Height - 40);
page.Canvas.RestoreGraphicsState();
page.Canvas.EndOptionalContentGroup();
// Build the display tree for the optional content,
// how its structure and relationships between optional content groups are presented to the user.
PDFOptionalContentDisplayTreeNode ocgPage1Node = new PDFOptionalContentDisplayTreeNode(ocgPage1);
document.OptionalContentProperties.DisplayTree.Nodes.Add(ocgPage1Node);
return(document);
}
