Mpdf - Getting "CrossReferenceException::OBJECT_NOT_FOUND" while trying to ImportPage from existing PDF file

[ali-assaabloy]

Guidelines

• I understand that if I fail to adhere to contribution guidelines and/or fail to provide all required details, this issue may be closed without review.

Description of the bug

I'm trying to use the Mpdf to add the bookmarks in the existing PDF file and for that I wrote this code:

$mpdf = new Mpdf(['format' => [215.9, 279.4]]);
$pagecount = $mpdf->SetSourceFile('existingFileName.pdf');
for($i = 1; $i <= $pagecount; $i++){
	$mpdf->AddPage();

	$tplId = $mpdf->ImportPage($i);

	$mpdf->useTemplate($tplId);

	$mpdf->Bookmark("bookmark".$i, 0);
}

$mpdf->Output('newfile.pdf', 'F');

But for some pages I'm getting the "Object (id:38521) not found." on ImportPage() --> getImportedExternalPageLinks() --> PdfType::resolve($annotation, $parser); --> $parser->getIndirectObject($value->value) --> $this->getCrossReference()->getIndirectObject($objectNumber); :

$offset = $this->getOffsetFor($objectNumber);
        if ($offset === false) {
            throw new CrossReferenceException(
                \sprintf('Object (id:%s) not found.', $objectNumber),
                CrossReferenceException::OBJECT_NOT_FOUND
            );
        }

mPDF version

v8.2.2

PHP Version and environment (server type, cli provider etc., enclosing libraries and their respective versions)

8.1.0

Reproducible PHP+CSS+HTML snippet suffering by the error

$mpdf = new Mpdf(['format' => [215.9, 279.4]]);
$pagecount = $mpdf->SetSourceFile('existingFileName.pdf');
for($i = 1; $i <= $pagecount; $i++){
	$mpdf->AddPage();

	$tplId = $mpdf->ImportPage($i);

	$mpdf->useTemplate($tplId);

	$mpdf->Bookmark("bookmark".$i, 0);
}

$mpdf->Output('newfile.pdf', 'F');

[finwe]

1. this is general troubleshooting
2. you did not provide files to reproduce
3. this looks like an issue of the underlying FPDI library

[ali-assaabloy]

existingFileName.pdf
Please find the file to reproduce it. I attached it while creating the issue, but no idea why it's not attached in the issue

[finwe]

The other two points still stand.

[ali-assaabloy]

Hi, I have created the issue at FPDI(Setasign/FPDI#191) and they fixed it. But in Mpdf the code is not using the FPDI importExternalLinks, as it's set to false by default on fpdiImportPage:

public function importPage($pageNumber, $box = PageBoundaries::CROP_BOX, $groupXObject = true)
{
  $pageId = $this->fpdiImportPage($pageNumber, $box, $groupXObject);
  
  $this->importedPages[$pageId]['externalLinks'] = $this->getImportedExternalPageLinks($pageNumber);
  
  return $pageId;
}

and adding the external links through getImportedExternalPageLinks. Please see the fix "Setasign/FPDI@78d0f74#diff-a8561a849cdf24990e0606796ed216d1edd9632c9584cc4b618b69fadd597ad0"