Delphi ActiveX 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. Delphi ActiveX

var
success: Integer;
pdf: TChilkatPdf;
json: TChilkatJsonObject;
jsonOut: TChilkatJsonObject;
i: Integer;
numSkipped: Integer;

begin
success := 0;

//  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 := TChilkatPdf.Create(Self);
success := pdf.LoadFile('qa_data/pdf/grand_canyon_hiking_guide.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

//  Ask for the two options that are reserved for a later release.
json := TChilkatJsonObject.Create(Self);
json.UpdateBool('mergeFontSubsets',1);
json.UpdateBool('compactType1Fonts',1);

jsonOut := TChilkatJsonObject.Create(Self);
success := pdf.Optimize('audit',json.ControlInterface,jsonOut.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(pdf.LastErrorText);
    Exit;
  end;

i := 0;
numSkipped := jsonOut.SizeOfArray('skipped');
Memo1.Lines.Add('skipped: ' + IntToStr(numSkipped));
while i < numSkipped do
  begin
    jsonOut.I := i;
    Memo1.Lines.Add('   ' + 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.