If the input PDF file is read-only the output PDF is corrupt. E.g. KDE's okular shows "Some errors were found in the document, Okular might not be able to show the content correctly" and Ghostscript prints "Dereference of free object 22, next object number as offset failed (code = -18), returning NULL object." - anyway, both show the PDF. I was told, some windows PDF apps can't view the files.
With the old version v2.038 of PDF::API2 this does not happen.
To reproduce I used this perl script and the attached input pdf:
#!/usr/bin/perl -w
use PDF::API2;
my $pdf=PDF::API2->open('test_input.pdf');
my $page=$pdf->openpage(1);
my $text=$page->text();
my $font=$pdf->font('Helvetica-Bold');
$text->font($font, 20);
$text->position(200, 700);
$text->text('Hello World!');
$pdf->saveas('test_output.pdf');
If the input PDF file is read-only the output PDF is corrupt. E.g. KDE's okular shows "Some errors were found in the document, Okular might not be able to show the content correctly" and Ghostscript prints "Dereference of free object 22, next object number as offset failed (code = -18), returning NULL object." - anyway, both show the PDF. I was told, some windows PDF apps can't view the files. With the old version v2.038 of PDF::API2 this does not happen.
To reproduce I used this perl script and the attached input pdf:
Sample input PDF: test_input.pdf Running the script with a read-write input file, the output is ok: test_output_from_rw-ok.pdf After making the input file read-only (e.g. chmod 444 test_input.pdf), the output is corrupt: test_output_from_ro-error.pdf
Tested with versions 2.043, 2.045 and 2.047 on Ubuntu and openSuse systems.