Re: [gtk-i18n-list] Rendering a custom glyph using pango

[suzuki toshiya <mpsuzuki hiroshima-u ac jp>]

Ferdinand Ramirez wrote:
> I am using ubuntu linux and tried to insert the string into a GtkTextBuffer using gtk_text_buffer_insert after calling g_locale_to_utf8 on the value. Maybe, my syntax is wrong.
> 
> For a value such as 46DB, I first call g_strdup_printf("%s", "\u46DB") and the gchar * that is returned is what I pass into g_locale_to_utf8.
> 
> For a value like 10005, it looks like I cannot use the above method like \u46DB.

Ahhhh... 10005 is hexadecimal expression of UCS-4 value? If so, U+10005
is a character in "LINEAR B SYLLABLE B001 DA". And, I'm not sure how
"\uXXXX" expression should bet used for the codepoints out of BMP at present.
For first trial, I recommend to use PUA codepoints in BMP, U+E000 - U+F8FF,
to check if "PUA" is the root of trouble, or non-BMP is the root of trouble.

Regards,
mpsuzuki

> Apart from making it work, I am also curious to know which part of the code actually loads the font file and extracts the glyph and how the code flow occurs from gtk through pango. 
> 
> Thanks a lot,
> -Ferdinand
> 
> --- On Mon, 2/13/12, suzuki toshiya <mpsuzuki hiroshima-u ac jp> wrote:
> 
>> From: suzuki toshiya <mpsuzuki hiroshima-u ac jp>
>> Subject: Re: [gtk-i18n-list] Rendering a custom glyph using pango
>> To: "Ferdinand Ramirez" <ramirez ferdinand yahoo com>
>> Cc: gtk-i18n-list gnome org
>> Date: Monday, February 13, 2012, 7:19 PM
>> Hi,
>>
>> Excuse me, I think Pango does not reject the rendering for
>> the characters at PUA codepoints, so, if you cannot find
>> the expected result (e.g. the codepoint is displayed by
>> unexpected/unwanted font), there is a possibility that
>> Pango could not find the expected font when PUA codepoints
>> are being rendered.
>>
>> How Pango search/select the font is platform dependent, but
>> I could not guess which platform you are using. Could you
>> post more detailed description of your problem?
>>
>> Regards,
>> mpsuzuki
>>
>> Ferdinand Ramirez wrote:
>>> How can I control from C code the display of a random
>> glyph that I have created and added to a ttf font file with
>> a unicode value that is in the private user area? Say I have
>> assigned the value 22222 and need to display the
>> corresponding glyph. Can I also map a totally random code
>> and get it to work?
>>> How does this work? Which code does the control go
>> through?
>>> On a related note, what if I want to display the same
>> glyph in gtk text area or on a gtk label? How would I do
>> that? I am able to do it for regular unicode values by
>> setting the font but noticed that it does not work when I
>> add the glyph to the private range and try to add the code
>> from the private range to the buffer.
>>> Thanks,
>>> -Ferdinand
>>> _______________________________________________
>>> gtk-i18n-list mailing list
>>> gtk-i18n-list gnome org
>>> http://mail.gnome.org/mailman/listinfo/gtk-i18n-list
>>