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Posted to dev@pdfbox.apache.org by Wolfgang Glas <wo...@iteg.at> on 2013/03/22 13:56:02 UTC
Various bugs in TTFSubFont, maybe blocking 1.8.0
Hi all,
Andreas has kindly integrated my TTFSubFont class into pdfbox-1.8.0.
However, we are experiencing crashes of Minolta printers, which stumble
across some subtle Problems in the extracted TTF fonts generated by this
class. Most notably, the font checksum is calculated to an invalid value
among other more subtle issues.
With the help of Microsoft's font validator tool, I have been able to
fix most of these problems in my original code:
http://www.microsoft.com/typography/fontvalidator.mspx
Currently, I'm awaiting the confirmation of our customer, that the
fixes cure the Minolts-printer-crashing problem.
Once I've received this confirmation I will work out a patch againt
pdfbox trunk, which seems to be quite easy, because the code there is
pretty much identical to my original code.
If all goes well, I should be able to come up with a patch until
Sunday, March 24th. If things turn out to be more cimplicated I will let
you know.
Best regards,
Wolfgang
Re: Various bugs in TTFSubFont, maybe blocking 1.8.0
Posted by Maruan Sahyoun <sa...@fileaffairs.de>.
+1 for releasing as is and fixing afterwards
Maruan Sahyoun
Am 22.03.2013 um 15:00 schrieb Andreas Lehmkuehler <an...@lehmi.de>:
> Hi,
>
> Am 22.03.2013 14:40, schrieb Wolfgang Glas:
>> Am 22.03.13 14:29, schrieb Andreas Lehmkuehler:
>>> Hi,
>>>
>>> Am 22.03.2013 13:56, schrieb Wolfgang Glas:
>>>> Hi all,
>>>>
>>>> Andreas has kindly integrated my TTFSubFont class into pdfbox-1.8.0.
>>> I just started the integration. We are far away from the end.
>>> Thanks again for sharing the code with us.
>>>
>>>> However, we are experiencing crashes of Minolta printers, which stumble
>>>> across some subtle Problems in the extracted TTF fonts generated by this
>>>> class. Most notably, the font checksum is calculated to an invalid value
>>>> among other more subtle issues.
>>> Is this because I integrated some of your stuff or because of how I
>>> integrated
>>> your stuff?
>>
>> It has nothing to do with the way you are intergrating the code. These
>> are all TTF-related misunderstandings I introduced myself.
> Sounds like my own experience, this font stuff is hard to understand if it
> comes to the details. :-(
>
>> The problem is, that Minolta Printer are less tolerant on TTF problems
>> than all PDF viewer I've tested so far.
> OK, I see
>
>>> Do you think it is a blocker for all or just for you? Maybe we should
>>> release
>>> 1.8.0 as is and do another bugfix release in a couple of weeks?
>>
>> It is a blocker for all users of TTFSubFont, because their users will cheat
>> them on breaking their Minolta printers like I've been cheated by my
>> customer.
>> I have a fix in my original code, which is build atop of pdfbox-1.7.1. I
>> have not switched over to 1.8.0 so far, but surely I'd love to see a
>> pdfbox-1.8.0 with working TTSubFont class.
> I tend to release 1.8.0 anyway as people are waiting for the new version and
> now that it is almost done I'm afraid some of them will become impatient if
> we stop it at this point. Furthermore I don't want to put some additional
> pressure on you to deliver a fix for that issue. Once your fix is available I
> can cut a new bugfix release. Maybe some other changes will be available too.
> WDYT?
>
>> Wolfgang
>
> BR
> Andreas Lehmkühler
Re: Various bugs in TTFSubFont, maybe blocking 1.8.0
Posted by Wolfgang Glas <wo...@iteg.at>.
Am 22.03.13 15:00, schrieb Andreas Lehmkuehler:
> Hi,
>
> Am 22.03.2013 14:40, schrieb Wolfgang Glas:
>> Am 22.03.13 14:29, schrieb Andreas Lehmkuehler:
>>> Hi,
>>>
>>> Am 22.03.2013 13:56, schrieb Wolfgang Glas:
>>>> Hi all,
>>>>
>>>> Andreas has kindly integrated my TTFSubFont class into
>>>> pdfbox-1.8.0.
>>> I just started the integration. We are far away from the end.
>>> Thanks again for sharing the code with us.
>>>
>>>> However, we are experiencing crashes of Minolta printers, which stumble
>>>> across some subtle Problems in the extracted TTF fonts generated by
>>>> this
>>>> class. Most notably, the font checksum is calculated to an invalid
>>>> value
>>>> among other more subtle issues.
>>> Is this because I integrated some of your stuff or because of how I
>>> integrated
>>> your stuff?
>>
>> It has nothing to do with the way you are intergrating the code. These
>> are all TTF-related misunderstandings I introduced myself.
> Sounds like my own experience, this font stuff is hard to understand if it
> comes to the details. :-(
>
>> The problem is, that Minolta Printer are less tolerant on TTF problems
>> than all PDF viewer I've tested so far.
> OK, I see
>
>>> Do you think it is a blocker for all or just for you? Maybe we should
>>> release
>>> 1.8.0 as is and do another bugfix release in a couple of weeks?
>>
>> It is a blocker for all users of TTFSubFont, because their users will
>> cheat
>> them on breaking their Minolta printers like I've been cheated by my
>> customer.
>> I have a fix in my original code, which is build atop of pdfbox-1.7.1. I
>> have not switched over to 1.8.0 so far, but surely I'd love to see a
>> pdfbox-1.8.0 with working TTSubFont class.
> I tend to release 1.8.0 anyway as people are waiting for the new version
> and
> now that it is almost done I'm afraid some of them will become impatient if
> we stop it at this point. Furthermore I don't want to put some additional
> pressure on you to deliver a fix for that issue. Once your fix is
> available I
> can cut a new bugfix release. Maybe some other changes will be available
> too.
> WDYT?
Just a short update: Our customer confirmed, that my fixes cured the Minolta
death, I will prepare for an JIRA issue and a patch within the next
few hours.
Unfortunately I cannot prepre these right now...
Wolfgang
Re: Various bugs in TTFSubFont, maybe blocking 1.8.0
Posted by Andreas Lehmkuehler <an...@lehmi.de>.
Hi,
Am 22.03.2013 14:40, schrieb Wolfgang Glas:
> Am 22.03.13 14:29, schrieb Andreas Lehmkuehler:
>> Hi,
>>
>> Am 22.03.2013 13:56, schrieb Wolfgang Glas:
>>> Hi all,
>>>
>>> Andreas has kindly integrated my TTFSubFont class into pdfbox-1.8.0.
>> I just started the integration. We are far away from the end.
>> Thanks again for sharing the code with us.
>>
>>> However, we are experiencing crashes of Minolta printers, which stumble
>>> across some subtle Problems in the extracted TTF fonts generated by this
>>> class. Most notably, the font checksum is calculated to an invalid value
>>> among other more subtle issues.
>> Is this because I integrated some of your stuff or because of how I
>> integrated
>> your stuff?
>
> It has nothing to do with the way you are intergrating the code. These
> are all TTF-related misunderstandings I introduced myself.
Sounds like my own experience, this font stuff is hard to understand if it
comes to the details. :-(
> The problem is, that Minolta Printer are less tolerant on TTF problems
> than all PDF viewer I've tested so far.
OK, I see
>> Do you think it is a blocker for all or just for you? Maybe we should
>> release
>> 1.8.0 as is and do another bugfix release in a couple of weeks?
>
> It is a blocker for all users of TTFSubFont, because their users will cheat
> them on breaking their Minolta printers like I've been cheated by my
> customer.
> I have a fix in my original code, which is build atop of pdfbox-1.7.1. I
> have not switched over to 1.8.0 so far, but surely I'd love to see a
> pdfbox-1.8.0 with working TTSubFont class.
I tend to release 1.8.0 anyway as people are waiting for the new version and
now that it is almost done I'm afraid some of them will become impatient if
we stop it at this point. Furthermore I don't want to put some additional
pressure on you to deliver a fix for that issue. Once your fix is available I
can cut a new bugfix release. Maybe some other changes will be available too.
WDYT?
> Wolfgang
BR
Andreas Lehmkühler
Re: Various bugs in TTFSubFont, maybe blocking 1.8.0
Posted by Wolfgang Glas <wo...@iteg.at>.
Am 22.03.13 14:29, schrieb Andreas Lehmkuehler:
> Hi,
>
> Am 22.03.2013 13:56, schrieb Wolfgang Glas:
>> Hi all,
>>
>> Andreas has kindly integrated my TTFSubFont class into pdfbox-1.8.0.
> I just started the integration. We are far away from the end.
> Thanks again for sharing the code with us.
>
>> However, we are experiencing crashes of Minolta printers, which stumble
>> across some subtle Problems in the extracted TTF fonts generated by this
>> class. Most notably, the font checksum is calculated to an invalid value
>> among other more subtle issues.
> Is this because I integrated some of your stuff or because of how I
> integrated
> your stuff?
It has nothing to do with the way you are intergrating the code. These
are all TTF-related misunderstandings I introduced myself.
The problem is, that Minolta Printer are less tolerant on TTF problems
than all PDF viewer I've tested so far.
> Do you think it is a blocker for all or just for you? Maybe we should
> release
> 1.8.0 as is and do another bugfix release in a couple of weeks?
It is a blocker for all users of TTFSubFont, because their users will cheat
them on breaking their Minolta printers like I've been cheated by my
customer.
I have a fix in my original code, which is build atop of pdfbox-1.7.1. I
have not switched over to 1.8.0 so far, but surely I'd love to see a
pdfbox-1.8.0 with working TTSubFont class.
Wolfgang
Re: Various bugs in TTFSubFont, maybe blocking 1.8.0
Posted by Andreas Lehmkuehler <an...@lehmi.de>.
Hi,
Am 22.03.2013 13:56, schrieb Wolfgang Glas:
> Hi all,
>
> Andreas has kindly integrated my TTFSubFont class into pdfbox-1.8.0.
I just started the integration. We are far away from the end.
Thanks again for sharing the code with us.
> However, we are experiencing crashes of Minolta printers, which stumble
> across some subtle Problems in the extracted TTF fonts generated by this
> class. Most notably, the font checksum is calculated to an invalid value
> among other more subtle issues.
Is this because I integrated some of your stuff or because of how I integrated
your stuff?
> With the help of Microsoft's font validator tool, I have been able to
> fix most of these problems in my original code:
>
> http://www.microsoft.com/typography/fontvalidator.mspx
>
> Currently, I'm awaiting the confirmation of our customer, that the
> fixes cure the Minolts-printer-crashing problem.
>
> Once I've received this confirmation I will work out a patch againt
> pdfbox trunk, which seems to be quite easy, because the code there is
> pretty much identical to my original code.
>
> If all goes well, I should be able to come up with a patch until
> Sunday, March 24th. If things turn out to be more cimplicated I will let
> you know.
Do you think it is a blocker for all or just for you? Maybe we should release
1.8.0 as is and do another bugfix release in a couple of weeks?
> Best regards,
>
> Wolfgang
Thanks for your feedback
BR
Andreas Lehmkühler