Pascal (Lazarus/Delphi)

Get a Structure Property Value from XMP

See more XMP Examples

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and fetch the value of a structure property, such as the Iptc4xmpCore:CiTelWork (found within the Iptc4xmpCore:CreatorContactInfo structure). Pascal (Lazarus/Delphi)

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.Xmp,
  Chilkat.Xml;

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

procedure RunDemo;
var
  success: Boolean;
  xmp: TXmp;
  xml: TXml;
  propVal: string;

begin
  success := False;

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

  xmp := TXmp.Create;

  //  Load a JPG or TIF image file.
  //  Sample JPG's with XMP metadata may be found at:
  //  http://www.chilkatsoft.com/testData/xmp/sample1.jpg
  //  http://www.chilkatsoft.com/testData/xmp/sample2.jpg
  //  http://www.chilkatsoft.com/testData/xmp/sample3.jpg
  success := xmp.LoadAppFile('sample1.jpg');
  if (success <> True) then
    begin
      WriteLn(xmp.LastErrorText);
      Exit;
    end;

  WriteLn('Num embedded XMP docs: ' + xmp.NumEmbedded);

  //  Assuming there is at least one, get the 1st.
  //  (There is typically never more than one, but theoretically it's possible.)
  xml := xmp.GetEmbedded(0);
  if (xmp.LastMethodSuccess = True) then
    begin

      propVal := xmp.GetStructValue(xml,'Iptc4xmpCore:CreatorContactInfo','Iptc4xmpCore:CiTelWork');
      if (xmp.LastMethodSuccess <> True) then
        begin
          WriteLn('Not found.');
        end
      else
        begin
          WriteLn(propVal);
        end;
      xml.Free;

    end
  else
    begin
      WriteLn(xmp.LastErrorText);
    end;


  xmp.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.