Thanks, your help is really appreciated. I have some more questions... how can i find direction of the text? Is HB able to determine the text direction by itself? I have a text that is a mixture of Arabic and English words i.e. a mixture of RTL and LTR text. How can I use harfbazz to process that? Best Regards, Sami <div class="gmail_quote">On Thu, Jul 5, 2012 at 12:08 AM, Adam Twardoch (List) <<a href="mailto:list.adam@twardoch.com" target="_blank">list.adam@twardoch.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 12-07-04 11:15, Shriramana Sharma wrote: > On Wed, Jul 4, 2012 at 2:40 PM, Samiullah Khawaja > <<a href="mailto:sami.khawaja@gmail.com">sami.khawaja@gmail.com</a>> wrote: >> Is there a list of languages supported by harfbuzz? Or it supports all the >> languages that are supported by the font in use? > HB doesn't support "languages". It supports "scripts". </div>It also supports "languages" -- the OpenType component supports both the script tags and the language tags: <a href="http://www.microsoft.com/typography/otspec/scripttags.htm" target="_blank">http://www.microsoft.com/typography/otspec/scripttags.htm</a> <a href="http://www.microsoft.com/typography/otspec/languagetags.htm" target="_blank">http://www.microsoft.com/typography/otspec/languagetags.htm</a> For script and language tags, HarfBuzz uses the ISO tags and then converts them into OpenType tags internally: <a href="http://cgit.freedesktop.org/harfbuzz/tree/src/hb-common.h" target="_blank">http://cgit.freedesktop.org/harfbuzz/tree/src/hb-common.h</a> <a href="http://cgit.freedesktop.org/harfbuzz/tree/src/hb-common.cc" target="_blank">http://cgit.freedesktop.org/harfbuzz/tree/src/hb-common.cc</a> <a href="http://cgit.freedesktop.org/harfbuzz/tree/src/hb-ot-tag.h" target="_blank">http://cgit.freedesktop.org/harfbuzz/tree/src/hb-ot-tag.h</a> <a href="http://cgit.freedesktop.org/harfbuzz/tree/src/hb-ot-tag.cc" target="_blank">http://cgit.freedesktop.org/harfbuzz/tree/src/hb-ot-tag.cc</a> In OpenType, each character is categorized into a script, and then it is being processed using the "default-language" routine for a script. But it's also possible to specify a specific language to go along with the script (for example "arab/URD" means Arabic script, Urdu language), and the font can provide alternative processing for such language which is different from the default behavior for a given script. Regards, Adam -- May success attend your efforts, -- Adam Twardoch (Remove "list." from e-mail address to contact me directly.) <div class="HOEnZb"><div class="h5"> _______________________________________________ HarfBuzz mailing list <a href="mailto:HarfBuzz@lists.freedesktop.org">HarfBuzz@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/harfbuzz" target="_blank">http://lists.freedesktop.org/mailman/listinfo/harfbuzz</a> </div></div></blockquote></div> -- Samiullah Khawaja Software Engineer email: <a href="mailto:sami.khawaja@gmail.com">sami.khawaja@gmail.com</a> voice: +(92) 0321-4184324