<div dir="ltr"><div>Set the calt feature value to 0 and pass it explicitly to the shaper </div>In python… def ot_feature(name, value): bytename = list(map(ord, name)) b, O = hb.feature_from_string(bytename) if b: O.value = value return O else: raise ValueError('invalid opentype feature name ' + repr(str(bytename))) ... no_calt = ot_feature('calt', 0) ... hb.shape(font, hb_buffer, [no_calt]) </div><div class="gmail_extra"> <div class="gmail_quote">On Fri, Aug 5, 2016 at 12:02 PM, Liam <<a href="mailto:liam@fallenacorn.com" target="_blank">liam@fallenacorn.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello again, I am having an issue with a certain font and how to handle it with the shaper. Sadly I can not post this font but hopefully I can explain this well enough to get a correct answer. This font has turned on by default the CALT table, and it also behaves differently compared to most open type fonts that I am testing with. I tested this font using adobe illustrator and by default it does grab the 'f' glyph from the calt table, but I can turn it off. Is there a way to have the hb_shaper to not use alternate glyph substitutions? My other option at the moment is to check for a null value for the features list and just use FreeType for the lookup. Thanks _______________________________________________ HarfBuzz mailing list <a href="mailto:HarfBuzz@lists.freedesktop.org" target="_blank">HarfBuzz@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/harfbuzz" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/harfbuzz</a> </blockquote></div> </div>