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    <div class="moz-cite-prefix">Thanks.<br>
      <br>
      I tried with Uniscribe, and it seems that HB applies calt and liga
      together in lookup order, while Uniscribe applies each feature
      independently. I put the details in the issue. <br>
      <br>
      Eric.<br>
      <br>
      On 7/11/17 2:15 AM, Behdad Esfahbod wrote:<br>
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cite="mid:CAF63+7VAKUhYaXOrGn2Ofim5_AjB53AYugkX8NShG6sRcKtLkw@mail.gmail.com">
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            <div>Hi Eric,<br>
              <br>
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            We try to follow Uniscribe very closely.  See:<br>
            <br>
              <a
href="https://github.com/behdad/harfbuzz/blob/master/src/hb-ot-shape-complex-arabic.cc#L181"
              moz-do-not-send="true">https://github.com/behdad/harfbuzz/blob/master/src/hb-ot-shape-complex-arabic.cc#L181</a><br>
            <br>
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          I'll follow up with your issue on github.<br>
          <br>
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        b<br>
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      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Tue, Jul 11, 2017 at 4:11 AM, Eric
          Muller <span dir="ltr"><<a
              href="mailto:emuller@amazon.com" target="_blank"
              moz-do-not-send="true">emuller@amazon.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">If I read
            the Microsoft spec for Arabic, it seems pretty clear that
            features should be applied one by one, in a specified order.
            On the other hand, I have the impression that Harfbuzz
            applies the lookups in lookup order. Is that the case?<br>
            <br>
            Evidence at <<a
              href="https://github.com/behdad/harfbuzz/issues/505"
              rel="noreferrer" target="_blank" moz-do-not-send="true">https://github.com/behdad/har<wbr>fbuzz/issues/505</a>>.<br>
            <br>
            Thanks,<br>
            Eric.<br>
            <br>
            ______________________________<wbr>_________________<br>
            HarfBuzz mailing list<br>
            <a href="mailto:HarfBuzz@lists.freedesktop.org"
              target="_blank" moz-do-not-send="true">HarfBuzz@lists.freedesktop.org</a><br>
            <a
              href="https://lists.freedesktop.org/mailman/listinfo/harfbuzz"
              rel="noreferrer" target="_blank" moz-do-not-send="true">https://lists.freedesktop.org/<wbr>mailman/listinfo/harfbuzz</a><br>
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        <br>
        -- <br>
        <div class="gmail_signature" data-smartmail="gmail_signature">behdad<br>
          <a href="http://behdad.org/" target="_blank"
            moz-do-not-send="true">http://behdad.org/</a></div>
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