sgcPDF 功能矩阵

procedure CreateEncryptedPDF(const AFileName: string);
var
  oPDF: TsgcPDFDocument;
begin
  oPDF := TsgcPDFDocument.Create;
  try
    oPDF.AddPage(595, 842).DrawText('Secret', 50, 780, sfHelveticaBold, 24);
    // user password opens the file, owner password grants full rights
    oPDF.SetEncryption(emAES_256, 'user123', 'owner456');
    oPDF.SaveToFile(AFileName);
  finally
    oPDF.Free;
  end;
end;

procedure SignPDF(const AInput, AOutput: string);
var
  oSigner: TsgcPDFSignatureHandler;
begin
  oSigner := TsgcPDFSignatureHandler.Create;
  try
    oSigner.LoadCertificateFromPFX('signer.pfx', 'test123');
    oSigner.Reason := 'Document approval';
    oSigner.Location := 'Barcelona';
    oSigner.HashAlgorithm := shaSHA256;
    // visible signature field on page 1: Left, Bottom, Right, Top
    oSigner.SetField('Signature1', 0, 50, 50, 250, 100);
    oSigner.SignDocument(AInput, AOutput);
  finally
    oSigner.Free;
  end;
end;

procedure SignPAdES(const AInput, AOutput: string);
var
  oKey: TsgcPEMKeyProvider;
  oSigner: TsgcPDFPAdESSigner;
begin
  oKey := TsgcPEMKeyProvider.Create(nil);
  oSigner := TsgcPDFPAdESSigner.Create(nil);
  try
    // any sgcSign key provider: PEM, PFX, PKCS#11, Windows store, cloud HSM
    oKey.LoadFromFile('signer.pem', 'signer.key');
    oSigner.KeyProvider := oKey;
    // paBB, paBT (timestamp), paBLT and paBLTA (long term validation)
    oSigner.Level := paBB;
    // signature field and appearance through the sgcPDF handler
    oSigner.Handler.SetField('Signature1', 0, 350, 50, 550, 110);
    oSigner.Handler.SignerName := 'John Smith';
    oSigner.Handler.Reason := 'Approved';
    oSigner.SignPDFFile(AInput, AOutput);
    oSigner.KeyProvider := nil;
  finally
    oSigner.Free;
    oKey.Free;
  end;
end;

procedure RedactFile(const AInput, AOutput: string);
var
  oRedactor: TsgcPDFRedactor;
  vOptions: TsgcPDFRedactionOptions;
begin
  oRedactor := TsgcPDFRedactor.Create;
  try
    // every occurrence of a text, on all pages
    oRedactor.AddText('John Smith');
    // an area of page 0: left, bottom, right, top in points
    oRedactor.AddArea(0, 50, 500, 250, 650);
    vOptions := oRedactor.Options;
    vOptions.OverlayText := 'REDACTED';
    vOptions.RemoveMetadata := True;
    oRedactor.Options := vOptions;
    oRedactor.Apply(AInput, AOutput);
  finally
    oRedactor.Free;
  end;
end;

procedure OutlineText(const AInput, AOutput: string);
var
  oOutliner: TsgcPDFTextOutliner;
begin
  oOutliner := TsgcPDFTextOutliner.Create;
  try
    // every glyph becomes a vector path, unused fonts are removed
    oOutliner.Apply(AInput, AOutput);
    WriteLn('Glyphs outlined: ', oOutliner.ConvertedGlyphs);
    WriteLn('Fonts removed: ', oOutliner.RemovedFonts);
  finally
    oOutliner.Free;
  end;
end;

using esegece.sgcPDF;
using static esegece.sgcPDF.sgcPDF_Types;

using (TsgcPDFDocument oSource = new TsgcPDFDocument())
using (TsgcPDFDocument oSheet = new TsgcPDFDocument())
{
    oSource.LoadFromFile("flyer.pdf");
    // two A4 pages side by side, placed by their trim box, with crop marks
    TsgcPDFPage oPage = oSheet.AddPage(1270, 922);
    for (int i = 0; i < 2; i++)
    {
        int vForm = oSheet.AddPageAsForm(oSource, i, TsgcPDFPageBox.ppbTrimBox);
        TsgcPDFRect oTrim = sgcPDFRect(40 + i * 595, 40, 635 + i * 595, 882);
        oPage.DrawFormInRect(vForm, oTrim, true);
        oPage.DrawCropMarks(oTrim);
    }
    oSheet.SaveToFile("sheet.pdf");
}