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<p class="MsoNormal"><span style="color:#1F497D">Thank you Peter!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Please see my comments inline.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<div style="mso-line-height-rule:exactly;-webkit-text-size-adjust:100%;"></div><span style="font-family:remialcxesans;"> </span><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Peter Constable [mailto:petercon@microsoft.com]
<br>
<b>Sent:</b> Wednesday, February 14, 2018 9:16 PM<br>
<b>To:</b> Levantovsky, Vladimir; mpeg-OTspec@yahoogroups.com<br>
<b>Subject:</b> RE: Comments on ISO/IEC 14496-22 "Open Font Format"<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D"><snip/><o:p></o:p></span></p>
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<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>Definition of lineGap in ‘hhea’ table – question on whether historical references to Win 3.1 and MacOS 6 and 7 still need to be preserved;<o:p></o:p></p>
<p class="MsoListParagraph"><span style="color:red">[PC] Is there particular benefit from removing those details? A partial accommodation would be to say, “Negative lineGap values are treated as zero in some legacy platform implementations.”<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="color:#1F497D">[VL] I suspect that for folks who graduated from college in 200x or later the references to Win 3.1 and MacOS 6 & 7 do not make much sense, I do like the alternative wording you proposed.<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="color:#1F497D">I’d also appreciate your thoughts on the remaining comments below.<o:p></o:p></span></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>Definition of maxStackElements in ‘maxp’ table – question about using a footnote instead of simply including it as part of the description;<o:p></o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>‘kern’ table, Format 0 – the description states that it is the only format (!) that will be properly interpreted by Windows and OS/2 – do we still need to state this?<o:p></o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>LookupFlag Bit enumeration table – the first table column should probably have title “Value” instead of “Type”<o:p></o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>GPOS table description – many table headers have “Value / Type / Description” columns, which is incorrect and should be revised to match other table definitions using “Type / Name / Description” format.<o:p></o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>GPOS Example 5 – needs review as I suspect Class2Count field has redundant comments.<o:p></o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>General comment: there are quite a few figures used in the OT/OFF text that show text rendered in low quality, low resolution bitmaps (e.g., see first three sections of
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__na01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fwww.microsoft.com-252Ftypography-252Fotspec-252Fbase.htm-26amp-3Bdata-3D02-257C01-257Cpetercon-2540microsoft.com-257Cb0ecad89143749431df808d5223cb66e-257C72f988bf86f141af91ab2d7cd011db47-257C1-257C0-257C636452566520551378-26amp-3Bsdata-3D7fGXGFajdaK6hDPjkJQ1cqJE8Iw0npoZnSc2cuZ-252FEw8-253D-26amp-3Breserved-3D0&d=DwMGaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=jb2T9D8Np5j0t1X2JtGDVMxJyD5fvLoEPxzRs46vOK4UfGfOrlVsyuleed6YRZk5&m=yTYsqm8JCi6GkE0Eo0NXPBpp_jkUcz-IsGl2OGwermc&s=QoDrOlGCUZxzuNF-FXayyl4DQKp-HY781CPh1kJjIaw&e=">
https://www.microsoft.com/typography/otspec/base.htm</a> and many other figures including illustrations for GSUB/GPOS/JSTF tables). Maybe it is the time to redo them – will need a lot of work but it’s a bit awkward when a document describing font format for
high-quality text rendering uses low-res, low quality images as illustrations. <o:p>
</o:p></p>
<p class="MsoListParagraph">-<span style="font-size:7.0pt;font-family:"Times New Roman","serif"">
</span>Recommendations: It may be a good time reconsider parts of the “Recommendation” section as some of them seem to be requirements (e.g. Big Endian byte ordering, table alignment, etc.) and some of them (e.g. device resolutions) may be outdated and no longer
relevant.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thank you,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Vladimir<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"remialcxesans","serif""> </span> <o:p>
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