sgcPDF，面向 Delphi 与 C++ Builder 的纯 Pascal PDF 库

procedure StampExistingPDF(const AInput, AOutput: string);
var
  oEditor: TsgcPDFEditor;
  oWatermark: TsgcPDFWatermarkOptions;
begin
  oEditor := TsgcPDFEditor.Create;
  try
    oEditor.LoadFromFile(AInput);
    oWatermark.Text := 'CONFIDENTIAL';
    oWatermark.Font := sfHelveticaBold;
    oWatermark.FontSize := 48;
    oWatermark.Rotation := 45;
    oWatermark.Opacity := 0.3;
    oWatermark.R := 0.5;
    oWatermark.G := 0.5;
    oWatermark.B := 0.5;
    oEditor.AddWatermarkAllPages(oWatermark);
    oEditor.AddPageNumbers(sfHelvetica, 10, 'Page %d of %d');
    oEditor.SaveToFile(AOutput);
  finally
    oEditor.Free;
  end;
end;

procedure PrintAllText(const AFileName: string);
var
  oPDF: TsgcPDFDocument;
  i: Integer;
begin
  oPDF := TsgcPDFDocument.Create;
  try
    oPDF.LoadFromFile(AFileName);
    for i := 0 to oPDF.PageCount - 1 do
      WriteLn(string(oPDF.ExtractTextW(i)));
  finally
    oPDF.Free;
  end;
end;

procedure RenderPageToPNG(const APDFFile, APNGFile: string; ADPI: Integer);
var
  oPDF: TsgcPDFDocument;
  oRenderer: TsgcPDFRendererRaster;
  oPage: TsgcPDFPage;
begin
  oPDF := TsgcPDFDocument.Create;
  try
    oPDF.LoadFromFile(APDFFile);
    oPage := oPDF.Pages[0];
    // pure Pascal rasterizer: no GDI, runs on Windows and Linux servers
    oRenderer := TsgcPDFRendererRaster.Create;
    try
      oRenderer.RenderPageToPNG(oPDF.Parser, oPage.PageDict,
        Round(oPage.Width * ADPI / 72), Round(oPage.Height * ADPI / 72),
        APNGFile);
    finally
      oRenderer.Free;
    end;
  finally
    oPDF.Free;
  end;
end;

procedure CreateTicketPDF(const aFileName: string);
var
  oPDF: TsgcPDFDocument;
  oPage: TsgcPDFPage;
  oSymbol: TsgcPDFBarcodeSymbol;
begin
  oPDF := TsgcPDFDocument.Create(nil);
  oSymbol := TsgcPDFBarcodeSymbol.Create;
  try
    oPDF.Info.Title := 'Ticket';
    oPage := oPDF.AddPage(595, 842);
    oPage.DrawText('Ticket 2026-001', 50, 780, sfHelveticaBold, 24);
    oPage.DrawLine(50, 770, 545, 770, 1.5);
    // Code 128 barcode in a 250 x 60 point box, black on white
    oSymbol.Symbology := bcCode128;
    oSymbol.Text := 'TKT-2026-001';
    oSymbol.DrawToPDF(oPage, 50, 680, 250, 60, $000000, $FFFFFF);
    // QR Code in a 120 x 120 point box
    oSymbol.Symbology := bcQRCode;
    oSymbol.QRErrorLevel := qrecQ;
    oSymbol.Text := 'https://www.esegece.com';
    oSymbol.DrawToPDF(oPage, 50, 540, 120, 120, $000000, $FFFFFF);
    oPDF.SaveToFile(aFileName);
  finally
    oSymbol.Free;
    oPDF.Free;
  end;
end;

#include <System.hpp>
#include "sgcPDF_Document.hpp"
#include "sgcPDF_Barcodes.hpp"
#include "sgcPDF_Barcode_Symbol.hpp"

void __fastcall CreateTicketPDF(const String aFileName)
{
  TsgcPDFDocument *oPDF = new TsgcPDFDocument(NULL);
  TsgcPDFBarcodeSymbol *oSymbol = new TsgcPDFBarcodeSymbol();
  try
  {
    oPDF->Info->Title = "Ticket";
    TsgcPDFPage *oPage = oPDF->AddPage(595, 842);
    oPage->DrawText("Ticket 2026-001", 50, 780, sfHelveticaBold, 24);
    oPage->DrawLine(50, 770, 545, 770, 1.5);
    // Code 128 barcode in a 250 x 60 point box, black on white
    oSymbol->Symbology = bcCode128;
    oSymbol->Text = "TKT-2026-001";
    oSymbol->DrawToPDF(oPage, 50, 680, 250, 60, 0x000000, 0xFFFFFF);
    // QR Code in a 120 x 120 point box
    oSymbol->Symbology = bcQRCode;
    oSymbol->QRErrorLevel = qrecQ;
    oSymbol->Text = "https://www.esegece.com";
    oSymbol->DrawToPDF(oPage, 50, 540, 120, 120, 0x000000, 0xFFFFFF);
    oPDF->SaveToFile(aFileName);
  }
  __finally
  {
    delete oSymbol;
    delete oPDF;
  }
}

using System;
using esegece.sgcPDF;

class Program
{
    static void Main()
    {
        using (TsgcPDFDocument oDoc = new TsgcPDFDocument())
        {
            oDoc.Info.Title = "Ticket";
            TsgcPDFPage oPage = oDoc.AddPage(595, 842);
            oPage.DrawText("Ticket 2026-001", 50, 780, TsgcPDFStandardFont.sfHelveticaBold, 24);
            oPage.DrawLine(50, 770, 545, 770, 1.5);

            // Code 128 barcode in a 250 x 60 point box, black on white
            TsgcPDFBarcodeSymbol oSymbol = new TsgcPDFBarcodeSymbol();
            oSymbol.Symbology = TsgcPDFBarcodeType.bcCode128;
            oSymbol.Text = "TKT-2026-001";
            oSymbol.DrawToPDF(oPage, 50, 680, 250, 60, 0x000000, 0xFFFFFF);

            // QR Code in a 120 x 120 point box
            oSymbol.Symbology = TsgcPDFBarcodeType.bcQRCode;
            oSymbol.QRErrorLevel = TsgcPDFQRErrorLevel.qrecQ;
            oSymbol.Text = "https://www.esegece.com";
            oSymbol.DrawToPDF(oPage, 50, 540, 120, 120, 0x000000, 0xFFFFFF);

            oDoc.SaveToFile("ticket.pdf");
        }
    }
}

using System;
using esegece.sgcPDF;

class Program
{
    static void Main()
    {
        // Create a one page A4 document and save it
        using (TsgcPDFDocument oDoc = new TsgcPDFDocument())
        {
            TsgcPDFPage oPage = oDoc.AddPage(595, 842);
            oPage.DrawText("Hello from sgcPDF", 50, 780, TsgcPDFStandardFont.sfHelveticaBold, 24);
            oPage.DrawLine(50, 770, 545, 770, 1.0);
            oPage.DrawText("Created with sgcPDF .NET.", 50, 740, TsgcPDFStandardFont.sfHelvetica, 12);
            oDoc.SaveToFile("hello.pdf");
        }

        // Load it again and extract the text of every page
        using (TsgcPDFDocument oDoc = new TsgcPDFDocument())
        {
            oDoc.LoadFromFile("hello.pdf");
            for (int i = 0; i < oDoc.PageCount(); i++)
                Console.WriteLine(oDoc.ExtractTextW(i));
        }
    }
}