Lazarus Pascal Requires Chilkat v11.7.0+

Why a PDF Optimization Was Skipped

See more PDF Optimization Examples

Demonstrates the "skipped" array, which lists the options that were asked for but not applied, each with a reason and, where it is page-specific, the pages. An option is skipped when it is reserved for a later release (mergeFontSubsets, compactType1Fonts), when the rules of the file forbid it (objectStreams in a PDF/A-1 file), or when the content could not be parsed safely (tidyContent and coalesceContent on a page whose content stream the parser does not understand). Nothing is ever changed on a guess: an option that cannot be applied safely is skipped and reported. Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Pdf,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  pdf: TPdf;
  json: TJsonObject;
  jsonOut: TJsonObject;
  i: Integer;
  numSkipped: Integer;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  //  The PDF used in this example is available at grand_canyon_hiking_guide.pdf

  pdf := TPdf.Create;
  success := pdf.LoadFile('qa_data/pdf/grand_canyon_hiking_guide.pdf');
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;

  //  Ask for the two options that are reserved for a later release.
  json := TJsonObject.Create;
  json.UpdateBool('mergeFontSubsets',True);
  json.UpdateBool('compactType1Fonts',True);

  jsonOut := TJsonObject.Create;
  success := pdf.Optimize('audit',json,jsonOut);
  if (success = False) then
    begin
      WriteLn(pdf.LastErrorText);
      Exit;
    end;

  i := 0;
  numSkipped := jsonOut.SizeOfArray('skipped');
  WriteLn('skipped: ' + numSkipped);
  while i < numSkipped do
    begin
      jsonOut.I := i;
      WriteLn('   ' + jsonOut.StringOf('skipped[i].option') + ' - ' + jsonOut.StringOf('skipped[i].reason'));
      i := i + 1;
    end;

  //  A skipped option is not a failure: Optimize returns true, the other options are applied, and the
  //  report says exactly what was left undone.


  pdf.Free;
  json.Free;
  jsonOut.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.