in reply to Re: CAM::PDF cleanoutput Error
in thread CAM::PDF cleanoutput Error

I have coded this: 

if (!$pdf1) {
    print "Create PDF failed \n";
    GETOUT;
    }

[download]

Where the subroutine GETOUT does some graceful shut down but the code is never executed. I also tried eval with the same non-result.

So, it seems the ->new() method returns something and, in the case of the ->output() method, it appears to be something CAM::PDF knows about.

Also, even though ->output works in the first case, if I use ->appendPDF later in the code and try to save the result the ->output method will fail with the same error.

Replies are listed 'Best First'.
Re^3: CAM::PDF cleanoutput Error
by GotToBTru (Prior) on Nov 25, 2014 at 17:20 UTC

    Perhaps the output functions clear out the document in memory? The docs don't explicitly say that, but it seems to match what you are observing.

    1 Peter 4:10
[reply]

      A fair question. It seem I made a newbie mistake by not publishing the full code. Here it is: 

      use strict;
use CAM::PDF;
use Data::Printer;

my $doc1 = 'Document1.PDF';
my $draw1 = 'Drawing1.PDF';
my $newdoc1 = 'NewDocument1.PDF';

print  "open the original document \n";
my $pdf1 = CAM::PDF->new($doc1);
my @prefs = $pdf1->getPrefs();
p (@prefs);

print "save it to the new location \n";
$pdf1->output($newdoc1);

print "open the new document \n";
$pdf1 = CAM::PDF->new($newdoc1);

print "open a drawing  \n";
my $pdf2 = CAM::PDF->new($draw1);

print "append the drawing to the new document \n";
$pdf1->appendPDF($pdf2);

print "save the appended document \n";
$pdf1->output($newdoc1);
print "Done \n"

      [download]

      For clarity I did not include the "if not" code. This code opens the original document and saves it as the new document. Then it re-opens the new document and appends a drawing document and finally saves the combined document. Except that the save does not happen. The output is below:

         
open the original document
[
    [0] undef,
    [1] undef,
    [2] 1,
    [3] 1,
    [4] 1,
    [5] 1
]
save it to the new location
open the new document
open a drawing
append the drawing to the new document
save the appended document
Bad request for object 1121 at position 0 in the file
Use of uninitialized value in string eq at C:/Dwimperl/perl/site/lib/C
+AM/PDF.pm
line 4898.
Done
Press any key to continue . . .

      [download]

      The first save is ok and is the original document but the second save never happens and the appended drawing is missing.

[reply]
[d/l]
[select]

        Here is something interesting. After trying several CAM::PDF external methods to see if anything has an effect on ->cleanoutput, I re-read the documentation and found a reference to ->cleanse, which is listed under "Routines that should not be called," in the context of throwing away unused font data.

        Well, I added it to my script anyway and now the combined document saves without error.

        So, I thought this is useful to pass along. Thanks for all the replies. I think this site is exceptionally helpful. Regards.

[reply]

In Section Seekers of Perl Wisdom