Re: [ft] Glyph issue in freetype 2.3.10

[suzuki toshiya]

Haha, I was feeling the version of Pango was slightly too old
and thinking about how to encourage you to update newer revision.

Regards,
mpsuzuki

Manoj Kumar Bhatta wrote:
>>> I'm afraid something wrong in Pango, and it
>>> might be long-term issue to analize why this trouble
>>> occurs.
> 
> I have updated Pango library from 1.22.1 to 2.18.0 and the problem solved !!!
> Now I can see arabic/indic properly.
> 
> Thanks for your help.
> 
> 
> On Mon, Nov 29, 2010 at 5:45 PM, Manoj Kumar Bhatta <address@hidden> wrote:
>>> I'm afraid something wrong in Pango, and it
>>> might be long-term issue to analize why this trouble
>>> occurs.
>> I also think,there may be problem with pango/pangoft2.
>> But I have no clues now where is the problem exactly.
>>
>>> OK, please tell me the versions of component softwares:
>>> GLib, Cairo and Pango, and configuration options you used
>> Software and its versions.
>>
>> GLib: 1.17.6 ( config with  --with-libiconv
>> --enable-iconv-cache--disable-selinux  --disable-fam --disable-xattr )
>>
>> Cairo: 1.8.10 ( config with --enable-directfb=yes --enable-xcb=no
>> --without-x --disable-xlib --disable-xlib-xrender  --disable-win32
>> --disable-pdf --disable-ps --disable-svg --enable-png )
>>
>> Pango: 1.22.1 ( config with  --without-x )
>>
>> Though, I have updated cairo-1.10.0. But did not work.
>>
>> -Manoj
>>
>> On Mon, Nov 29, 2010 at 3:49 PM,  <address@hidden> wrote:
>>> Hi,
>>>
>>> Thank you very much for screen shots. Apparently,
>>> there is shaping error, the enclosing vowel signs
>>> are not reordered to form correct ligature.
>>>
>>> However, unfortunately, I (and maybe Werner too) have
>>> no candidates in my mind about the root causing this
>>> error. I'm afraid something wrong in Pango, and it
>>> might be long-term issue to analize why this trouble
>>> occurs.
>>>
>>> On Mon, 29 Nov 2010 13:17:15 +0530
>>> Manoj Kumar Bhatta <address@hidden> wrote:
>>>
>>>>> 1) how many prebuilt libraries in your DirectFB/GTK?
>>>>>   a) all are prebuilt by external developer (e.g. some Linux distributors)
>>>>>   b) all, except of freetype-2.3.10
>>>>>   c) all, except of previous freetype-2.3.9 & current 2.3.10.
>>>>>   d) other combinations
>>>> We have built all the libraries from its source.( including DirectFB
>>>> to freetype)
>>>> We built freetype 2.3.9 and freetype 2.3.10 to check the issue.
>>> OK, please tell me the versions of component softwares:
>>> GLib, Cairo and Pango, and configuration options you used
>>> (if you have any account to a web server with huge storage,
>>>  I want to obtain your building directory of the components).
>>>
>>> I will make a modified Pango showing many many debugging
>>> messages, to trace its Indic shaper behaviour. Maybe using
>>> "pango-view" is sufficient to check the shaper's behaviour.
>>>
>>> Regards,
>>> mpsuzuki
>>>
>>>> On Fri, Nov 26, 2010 at 5:05 PM,  <address@hidden> wrote:
>>>>> Hi,
>>>>>
>>>>> On Fri, 26 Nov 2010 16:49:27 +0530
>>>>> Manoj Kumar Bhatta <address@hidden> wrote:
>>>>>> I have used freetype 2.3.9 to display Indic/arabic language using gtk.
>>>>>> It displays correctly with its contextual interpretation.
>>>>>> But when I changed to freetype-2.3.10, I can see only original form of
>>>>>> each glyph, thus without any contextual
>>>>>> interpretation.
>>>>>> My environment is DirectFB/GTK.
>>>>>>
>>>>>> Can anyone suggest what can be the issue ?
>>>>> Umm, it's not easy for me to setup DirectFB/GTK environment
>>>>> soon, so please let me know more detail about your trouble.
>>>>>
>>>>> 1) how many prebuilt libraries in your DirectFB/GTK?
>>>>>
>>>>> 2) how did you update freetype?
>>>>>
>>>>> As far as I know, the text layout engine in GTK (Pango/
>>>>> HarfBuzz) does not rely any functionalities of FreeType2
>>>>> for Arabic/Indic text layout, it invokes FreeType2 to
>>>>> translate from Unicode to glyph index, and load a glyph
>>>>> data by glyph index. If these 2 functionalities are broken,
>>>>> I guess, the component glyphs would be wrong already
>>>>> (not contextual layout error). If you can make some
>>>>> screenshots, it's appreciated.
>>>>>
>>>>> Regards,
>>>>> mpsuzuki
>>>>>
> 
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