[Koha-devel] [Koha] barcodes,

[Chris Nighswonger]

On Fri, Jul 3, 2009 at 1:14 PM, Joe Atzberger <ohiocore at gmail.com> wrote:

> Note: This would dramatically increase the resulting filesize and the
> computational cost of delivering it.
>

Right, roughly an eye-popping 636% larger file size. So if one is printing
very large label batches (>500 labels) it might not work well for them.

This is really only a workaround. I'm working to try to understand exactly
what needs to be changed in PDF::Reuse to correct the Type3 issue. I hope to
have a *real* fix for it in the near future.

As an alternative, this workaround could simply be applied on a case-by-case
basis rather than committing the patch I submitted to the main repo.

Regards,
Chris


>
> 2009/7/3 Chris Nighswonger <cnighswonger at foundations.edu>
>
>> On Sat, Jun 27, 2009 at 4:27 PM, Chris Nighswonger <
>> cnighswonger at foundations.edu> wrote:
>>
>>> On Sat, Jun 27, 2009 at 8:10 AM, mike re-v<mrmrmr50 at yahoo.com> wrote:
>>> >
>>> > Greetings,
>>> > print to file and send it to me, I'll see if I can open it.
>>> > Alternatively, hexedit will open, it and it could look at the leader
>>> > and the end byte codes to see what it is you are producing.Then compare
>>> what you are producing to what works.
>>> >
>>> > from the command line $ hexedit foo.pdf
>>> >
>>>
>>> Alternately you can just open the pdf in a plain text editor and check
>>> to see that the barcode data is there. PDF is a sort of mangled Post
>>> Script stream.
>>>
>>>
>>> Below is the stream for a single item. The line with the series of
>>> zeros and ones is the barcode. However, I can confirm that the
>>> barcodes do not display in Reader 9.0 while they do in 7.0. Versions
>>> 8.0 and 9.0 use PDF version 1.7 while 7.0 uses 1.6. There may be a
>>> subtle difference in syntax that causes the breakage. I'll open a bug
>>> and try to take a look at it next week.
>>>
>>
>> The issue here is not a Koha issue, but *probably* an issue where Adobe
>> Reader does not maintain backward compatibility. Fortunately the fix is not
>> so bad. We just switch from embedding the barcodes as a Type3 font to
>> graphical embedding. I'll submit a patch later today against the current
>> HEAD. It will need to be back-ported to the 3.0.x branch as well.
>>
>> Regards,
>> Chris
>>
>>
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>> Koha-devel at lists.koha.org
>> http://lists.koha.org/mailman/listinfo/koha-devel
>>
>>
>
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