unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, SynPdf, StdCtrls, DebenuPDFLibraryDLL1111;

type
  TForm1 = class(TForm)
    btn1: TButton;
    edt1: TEdit;
    edt2: TEdit;
    lbl1: TLabel;
    procedure btn1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

// 读取pdf文本内容以及图片
function ReadPdf(const fileName, saveImagePath: string; var text: string;
  var imageFiles: string): string;
var
  rPdf: TDebenuPDFLibraryDLL1111;
  imageCount, i, j, num, keyStatus, FH, PR: Integer;
begin
  Result := '';
  num := 0;
  if Trim(fileName) = '' then
  begin
    Result := 'Path cannot be empty';
    Exit;
  end;
  if (Trim(saveImagePath) <> '') and (not DirectoryExists(saveImagePath)) then
  begin
    ForceDirectories(saveImagePath); // 创建目录
  end;

  rPdf := TDebenuPDFLibraryDLL1111.Create('DebenuPDFLibraryDLL1111.dll'); // 库
  keyStatus := rPdf.UnlockKey('**********'); // 密钥 秘钥可以购买或者找我要
  if keyStatus <> 1 then
  begin
    Result := 'The library cannot be loaded or unlocked fails';
    Exit;
  end;
  try
    rPdf.LoadFromFile(Trim(fileName), '');
    // 以直接访问模式打开文件并存储文件句柄
    FH := rPdf.DAOpenFile(fileName, '');
    for i := 1 to rPdf.DAGetPageCount(FH) do
    begin
      rPdf.SelectPage(i); // 选区页
      text := text + rPdf.GetPageText(8); // 获取文本 8:更准确的文本提取算法
      if Trim(saveImagePath) <> '' then
      begin
        imageCount := rPdf.GetPageImageList(0); // 获取图片
        for j := 1 to rPdf.GetImageListCount(imageCount) do // 遍历当前页中的所有图片
        begin
          rPdf.SaveImageListItemDataToFile(imageCount, j, 0,
            saveImagePath + '\' + IntToStr(num) + '.png');
          imageFiles := imageFiles + saveImagePath + '\' + IntToStr(num)
            + '.png ; ';
          inc(num);
        end;
      end;
    end;
  finally
    rPdf.Free;
  end;
end;

// 写pdf
function WritePdf(const fileName, text: string): string;
var
  wPdf: TDebenuPDFLibraryDLL1111;
  num, wStatus: Integer;
begin
  Result := '';
  if Trim(fileName) = '' then
  begin
    Result := 'Path cannot be empty';
    Exit;
  end;
  try
    wPdf := TDebenuPDFLibraryDLL1111.Create('DebenuPDFLibraryDLL1111.dll'); // 库
    try
      wStatus := wPdf.UnlockKey('*************'); // 密钥 
      if wStatus = 1 then
      begin
        num := wPdf.AddTrueTypeSubsettedFont('FangSong', text, 0);
        wPdf.SelectFont(num);
        wPdf.DrawWrappedText(50, 750, 500, text);
        wPdf.SaveToFile(fileName);
      end
      else
      begin
        Result := 'The library cannot be loaded or unlocked fails';
      end;
    finally
      wPdf.Free;
    end;
  except
    on e: Exception do
      Result := e.Message;
  end;
end;



procedure TForm1.btn1Click(Sender: TObject);
var
  text, imageFiles: string;
begin
  text := '';
  imageFiles := '';
  // showmessage(WritePdf(edt1.Text,edt2.Text));
  ShowMessage(ReadPdf(edt1.text, edt2.text, text, imageFiles));
  lbl1.Caption := text;
  ShowMessage(text);
  ShowMessage(imageFiles);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  //readAndWritePDf();
end;

end.