Re: [ft] Glyph issue in freetype 2.3.10

[Manoj Kumar Bhatta]

>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
>>>
>>
>