<div dir="ltr">I agree with Jonathan here. The only difference right now is of course a new pair added to Unicode 6.1, U+27CB and U+27CD MATHEMATICAL RAISING DIAGONAL and MATHEMATICAL FALLING DIAGONAL. HarfBuzz currently would choose the mirrored pair from the CMAP of the font if there is no rtla/rtlm lookup in the font, but that is incorrect according to the OpenType spec.</div> <div class="gmail_extra"> <div class="gmail_quote">On Sat, Jan 18, 2014 at 5:04 AM, Jonathan Kew <<a href="mailto:jfkthame@googlemail.com" target="_blank">jfkthame@googlemail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">We've talked about this at some point in the past, and IIRC Behdad was reluctant, but I think we should just fix harfbuzz to respect the OMPL, exactly as spec'd. Even though it's an ugly solution. JK<div class="HOEnZb"><div class="h5"> On 18/1/14 11:56, Khaled Hosny wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hi Behdad, According to the spec[1] character mirroring uses a fixed OpenType Mirroring Pairs List[2] (I guess for stability in case Unicode changes mirroring properties as was done in the past), but HarfBuzz does not use it and uses the Unicode mirrored property instead, is this intentional? Regards, Khaled 1. <a href="http://www.microsoft.com/typography/otspec/TTOCHAP1.htm#ltrrtl" target="_blank">http://www.microsoft.com/typography/otspec/TTOCHAP1.htm#ltrrtl</a> 2. <a href="http://www.microsoft.com/typography/otspec/ompl.txt" target="_blank">http://www.microsoft.com/typography/otspec/ompl.txt</a> _______________________________________________ HarfBuzz mailing list <a href="mailto:HarfBuzz@lists.freedesktop.org" target="_blank">HarfBuzz@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/harfbuzz" target="_blank">http://lists.freedesktop.org/mailman/listinfo/harfbuzz</a> </blockquote> _______________________________________________ HarfBuzz mailing list <a href="mailto:HarfBuzz@lists.freedesktop.org" target="_blank">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> </div>