[HarfBuzz] Problem with shaping Serif fonts

[Rolf Langenhuijzen]

Sorry, I don't know in your case, I'm not using Harfbuzz like that yet for anything. But I can imagine not using any special features when breaking up text for animation etc. because it doesn't look right, and it's a stylistic extra. For example if the animation would end you could always mark up the text so that it doesn't require the ligature (space it out, but with care)

I'm sure somebody else here can say how to use (or not use) features (or put you in the right direction).

Rolf

On Oct 9, 2013, at 3:09 PM, Eduardo Castiñeyra <eduardo at brainstorm.es> wrote:

> How would I turn it off?
> 
> Sent from a mobile device
> 
> On 09/10/2013, at 12:07, Rolf Langenhuijzen <rolf.langenhuijzen at xs4all.nl> wrote:
> 
>> Why wouldn't you tun off the liga feature in that case?
>> 
>> Rolf
>> 
>> Eduardo Castiñeyra schreef op 2013-10-09 10:32:
>> 
>>> Is there any way to avoid that? Despite ff being a single glyph, it represents two clusters, imagine I want to animate the tracking of a word, it would look like this
>>> 
>>> e ff i c i e n t 
>>> 
>>> Although glyph-wise it would be correct, it would be very hard to convince any customer about that.
>>> 
>>> In some cases it would be nice to force the shaper to output at least one glyph per cluster. 
>>> 
>>> Does it also depend on the language? If one script have one ligature it doesn't mean every language makes use of it.
>>> 
>>> Regards!
>>> 
>>> Sent from a mobile device
>>> 
>>> On 09/10/2013, at 06:23, Khaled Hosny <khaledhosny at eglug.org> wrote:
>>>> On Wed, Oct 09, 2013 at 01:39:17AM +0200, Oliver Meier wrote:
>>>>> 
>>>>> Hello I recently started playing with harfbuzz and encountered a strange problem. I don't know what I'm doing wrong, but somehow multiple f's shaped for serif fonts like DejaVuSerif or FreeSerif get grouped in pairs or so.. hb_buffer_set_direction( hb_buffer, HB_DIRECTION_LTR ); hb_buffer_set_script( hb_buffer, HB_SCRIPT_LATIN ); hb_buffer_set_language( hb_buffer, hb_language_from_string("en", strlen("en")) ); hb_buffer_add_utf8( hb_buffer, "ffff", strlen("ffff"), 0, strlen("ffff") ); hb_shape( hb_ft_font, hb_buffer, NULL, 0 ); hb_glyph_info_t *glyph_info = hb_buffer_get_glyph_infos(hb_buffer, &glyph_count); At this point glyph_count=2 instead of 4. In the kerning i see that f's are indeed "grouped". Can someone point me in the right direction, or is this a bug?
>>>> https://en.wikipedia.org/wiki/Typographic_ligature#Latin_alphabet BTW, if you have any code that assumes the number of output glyphs will be equal to the number of input characters, it is wrong. Regards, Khaled _______________________________________________ HarfBuzz mailing list HarfBuzz at lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/harfbuzz
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