[poppler] Support for CJK fonts in postscript / on Windows platforms

Sat Mar 3 07:56:05 PST 2012

Am 03.03.2012 11:08, schrieb Thomas Freitag:
> Am 03.03.2012 10:43, schrieb Thomas Freitag:
>> Am 02.03.2012 20:14, schrieb Albert Astals Cid:
>>> El Dilluns, 27 de febrer de 2012, a les 09:25:03, Thomas Freitag va 
>>> escriure:
>>>> Am 26.02.2012 23:04, schrieb Albert Astals Cid:
>>>>> El Diumenge, 26 de febrer de 2012, a les 08:44:09, Thomas Freitag va
>>> escriure:
>>>>>> Hi,
>>>>> Hi, it would be you really cool if you configured your Visual 
>>>>> Studio with
>>>>> the poppler [crazy] indentation settings, it's getting harder and 
>>>>> harder
>>>>> to read/diff/apply your patches :-/
>>>> Sorry, I'll try. Should be only GlobalParamsWin.cc, which I edited in
>>>> Visual Studio, isn't it?
>>> No, the other was wrong too, poppler has a very weird indenting 
>>> pattern and is
>>> difficult to get right, it's basically 2 spaces for each indentation 
>>> but when
>>> you have 8 spaces it gets replaced with a tab character
>>
>> I hope the attached patch is better. At least it fits to the head 
>> revision.
> Sorry once again. Just saw that it seems to my PSPad editior, which 
> inserted tabs. I try to repair it just in the diff, hopefully looks 
> better!
> So try this patch.
Grrrr. It was not a good idea to manipulate a diff file. It looks nice 
but it no more applyable. This is now made on unix.

Thomas
>
> Thomas
>>
>>>
>>>>>> I implemented a patch which supports CJK fonts in the postscript 
>>>>>> output
>>>>>> device and on Windows platforms in general. It consists mainly of 
>>>>>> three
>>>>>> parts:
>>>>>>
>>>>>> 1. Adapt bug fix for bug 11413 to the postscript device
>>>>>> 2. A small bug fix when locateFont doesn't find a suitable font and
>>>>>> returns a null pointer
>>>>>> 3. CJK substitute implementation on WIndows platforms.
>>>>>>
>>>>>> to 1.:
>>>>>> Adapting the implementation of the bug fix for splash and cairo 
>>>>>> to the
>>>>>> postscript device was quite easy. But my first proofs of the 
>>>>>> output with
>>>>>> ghostscript 8.71 shows some regressions where the CJK chars have a
>>>>>> smaller height than the default square of the font. But the "48" 
>>>>>> in the
>>>>>> output of bug-poppler11413.pdf which is set in a "normal" font but
>>>>>> rotated was at the right position. Then I stepped to ghostscript 
>>>>>> 9.04,
>>>>>> and now the CJK chars were shown correctly, but the 48 was 
>>>>>> positioned
>>>>>> wrong. But because of these different tests I think that it is 
>>>>>> still a
>>>>>> problem in ghostscript when using a mix of CJK fonts and "normal" 
>>>>>> fonts.
>>>>>> BTW, also Acrobat X distiller has problems with the position of 
>>>>>> the "48"!
>>>>> I understand this applies to non-windows too, right?
>>>> Yes, point 1 and 2 applies to all platforms (even if 2 probably only
>>>> happens if don't using fonfconfig, so just under Windows)
>>> So what's the difference i should see when running in linux? The 
>>> outputted ps
>>> file having a different rendering for CJK files?
>>
>> Yes. Do You haven't seen it or haven't tried it with 
>> bug-poppler11413.pdf? I attach sreenshots before and after. If You 
>> haven't seen any differences, is it possible that You haven't 
>> installed "our" language pack, i.e. the poppler data dir isn't at the 
>> correct place? Under windows I normally patch the allocation of 
>> GlobalParms, i.e.
>>
>>   globalParams = new 
>> GlobalParams("E:\\Downloads\\poppler\\poppler-data-0.4.5");
>>
>> under unix I link it to /usr/local/share/poppler
>>
>> Thomas
>>>
>>> Albert
>>>
>>>> Thomas
>>>>
>>>>> Albert
>>>>>
>>>>>> to 2.:
>>>>>> On my first tests with PDF which uses non embedded CJK fonts on 
>>>>>> Windows
>>>>>> I got crashes. Reason for it was that GlobalParamWin returns 
>>>>>> Helvetica,
>>>>>> which is not a CID font, but locateFont accepts here only CID 
>>>>>> fonts and
>>>>>> therefore returns a NULL pointer. I first fixed that and then 
>>>>>> decided to
>>>>>> return as default MS Mincho if a CID font is expected.
>>>>>>
>>>>>> to 3.:
>>>>>> When You install ghostscript on WIndows You're able to switch on CJK
>>>>>> support. This will create a  cidfmap file in the gs-lib 
>>>>>> directory. The
>>>>>> ps file which creates it (mkcidfm.ps) runs over the windows font
>>>>>> directory and tries to create a suitable substitution table for 
>>>>>> missing
>>>>>> CJK fonts. The cidfmap file is more or less PDF like, so it's 
>>>>>> quite easy
>>>>>> to parse it with our parser and create a substitution table in
>>>>>> GlobalParamsWin and use that table. But I expect it in the 
>>>>>> poppler data
>>>>>> dir instead of searching for ghostscript installation. If it is not
>>>>>> there, it always returns the default CID font of point 2.
>>>>>> You can either copy it from the gs lib directory or create it 
>>>>>> with the
>>>>>> ghostscript tool calling
>>>>>>
>>>>>> gswin32c -q -dBATCH -sFONTDIR=<windows font directory>
>>>>>> -sCIDFMAP=<popper data dir>/cidfmap mkcidfm.ps
>>>>>>
>>>>>> To clearify the format of cidfmap I attach the file produced on my
>>>>>> installation. Keep care: I have not a default windows 
>>>>>> installation with
>>>>>> windows on c:/windows, my windows installation is on drive f!
>>>>>>
>>>>>> Cheers,
>>>>>> Thomas
>>>>> _______________________________________________
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>>>>> http://lists.freedesktop.org/mailman/listinfo/poppler
>>>>>
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