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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you Peter, very good and timely catch!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I added this correction to the summary of proposed WD changes (m39796) and re-uploaded a new version of the document. I will point out this late addition at
the Systems group plenary meeting on Monday to make sure we are in good shape and the right version of the document is considered.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks again,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Vladimir<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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""> mpeg-OTspec@yahoogroups.com [mailto:mpeg-OTspec@yahoogroups.com]
<b>On Behalf Of </b>Peter Constable petercon@microsoft.com [mpeg-OTspec]<br>
<b>Sent:</b> Thursday, January 12, 2017 8:39 PM<br>
<b>To:</b> mpeg-OTspec@yahoogroups.com<br>
<b>Subject:</b> [mpeg-OTspec] 'avar' correction in OpenType 1.8, OpenType 1.8.1<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid white 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"> <o:p></o:p></p>
<div id="ygrp-mlmsg">
<div id="ygrp-msg">
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<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">An error in the ‘avar’ table chapter of the OT spec was just pointed out: the axisCount field was defined in OT as uint16, which matches what is used for the corresponding field
in the ‘fvar’ and ‘gvar’ tables in both OT and Apple’s TrueType spec. However, Apple’s ‘avar’ table spec used int32 for the axisCount field — I assume this was done to provide four-byte alignment of header fields. This was not noticed when the ‘avar’ chapter
for the OT spec was drafted. But clearly compatibility with Apple’s ‘avar’ spec is necessary.
<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">We’ve published errata for OT 1.8 and OT 1.8.1 with a correction for this issue.<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"><a href="https://www.microsoft.com/typography/otspec/errata.htm">https://www.microsoft.com/typography/otspec/errata.htm</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="https://www.microsoft.com/typography/otspec180/errata.htm">https://www.microsoft.com/typography/otspec180/errata.htm</a><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">The ‘avar’ header is now documented as follows:<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"><i><span style="font-size:10.0pt;font-family:"Georgia","serif"">Axis variation table:</span></i><o:p></o:p></p>
<table class="MsoNormalTable" border="0" cellspacing="3" cellpadding="0" width="70%" style="width:70.0%;margin-left:3.0pt;background:#F0F0F0">
<tbody>
<tr>
<td width="20%" style="width:20.0%;background:silver;padding:0in 0in 0in 0in">
<p class="MsoNormal" align="center" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center">
<i><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Type</span></i><o:p></o:p></p>
</td>
<td width="20%" style="width:20.0%;background:silver;padding:0in 0in 0in 0in">
<p class="MsoNormal" align="center" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center">
<i><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Name</span></i><o:p></o:p></p>
</td>
<td width="60%" style="width:60.0%;background:silver;padding:0in 0in 0in 0in">
<p class="MsoNormal" align="center" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center">
<i><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Description</span></i><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">uint16</span><o:p></o:p></p>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">majorVersion</span><o:p></o:p></p>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Major version number of the axis variations table — set to 1.</span><o:p></o:p></p>
</td>
</tr>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">uint16</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">minorVersion</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">Minor version number of the axis variations table — set to 0.</span><o:p></o:p></p>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow">uint16</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow"><reserved></span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow">Permanently reserved; set to zero.</span><o:p></o:p></p>
</td>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow">uint16</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow">axisCount</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";background:yellow">The number of variation axes for this font. This must be the same number as axisCount in the 'fvar'
table.</span><o:p></o:p></p>
</td>
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<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">SegmentMaps</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">axisSegmentMaps[axisCount]</span><o:p></o:p></p>
</td>
<td valign="top" style="border:none;border-bottom:solid #E0E0E0 1.0pt;padding:0in 0in 0in 0in">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif"">The segment maps array — one segment map for each axis, in the order of axes specified in the 'fvar' table.</span><o:p></o:p></p>
</td>
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</tbody>
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<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"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Peter<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="color:white"><o:p></o:p></span></p>
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