Re: [ft] Glyph issue in freetype 2.3.10

[Manoj Kumar Bhatta]

Hi,

If you do not mind, could you please tell me what are improvements  of
freetype 2.3.7 to 2.3.10/11 ?
Any performance improvement,if so how to measure ?

Thanks,
Manoj

2010/12/2 suzuki toshiya <address@hidden>:
> 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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