<div dir="ltr">I thought ppem was dependent on UPEM and font scale, is it not? </div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Jun 28, 2016 at 7:12 PM, Khaled Hosny <<a href="mailto:khaledhosny@eglug.org" target="_blank">khaledhosny@eglug.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Device tables depend on ppem, so despite the scale being set on the font, you should still set the exact ppem. <div class="HOEnZb"><div class="h5"> On Tue, Jun 28, 2016 at 06:43:58PM -0400, Kelvin Ma wrote: > so that’s the only way huh… > doesn’t that kind of defeat the purpose of hb.font_create() and having many > scaled versions of the same font? You would only ever need one font of each > face, scaled to the UPEM, if the fontsize was to be applied externally > after shaping already occurred. > > On Tue, Jun 28, 2016 at 5:51 PM, Behdad Esfahbod <<a href="mailto:behdad@behdad.org">behdad@behdad.org</a>> wrote: > > > HarfBuzz coordinates work in a int32 space. You are free to set whatever > > scales you want on the font. For example, use 6 or 8 or 10 or 16 bits of > > sub-pixel precision by multiplying your scale by a number. > > > > On Tue, Jun 28, 2016 at 4:57 PM, Kelvin Ma <<a href="mailto:kelvinsthirteen@gmail.com">kelvinsthirteen@gmail.com</a>> > > wrote: > > > >> It appears that harfbuzz rounds all decimals to integers when giving > >> glyph advances and offsets. This is causing some ugly misalignment problems > >> in arabic shaping, as well as latin cursive fonts. (see pictures) > >> > >> [image: Inline image 1] > >> > >> [image: Inline image 2] > >> > >> [image: Inline image 3] > >> How do I get harfbuzz to preserve the floats? > >> > >> _______________________________________________ > >> HarfBuzz mailing list > >> <a href="mailto:HarfBuzz@lists.freedesktop.org">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> > >> > >> > > > > > > -- > > behdad > > <a href="http://behdad.org/" rel="noreferrer" target="_blank">http://behdad.org/</a> > > > _______________________________________________ > HarfBuzz mailing list > <a href="mailto:HarfBuzz@lists.freedesktop.org">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> </div></div></blockquote></div> </div>