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<div class="">There seems to be a subtle problem with the way subsetted Type0 fonts are built</div>
<div class="">by xdvipdfmx with XeLaTeX jobs, for the purposes of finding the /ToUnicode resource.</div>
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<div class="">The main view is fine, but when checking other aspects, for standards compliance, some basic tests fail.</div>
<div class="">See e.g. with included image.</div>
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<div class=""><img apple-inline="yes" id="B8F26A26-7FBD-49E5-8CEC-6992E69E0D8B" width="640" height="345" src="cid:4F0A2FCB-B291-48D1-9450-890808FE0D02@telstra.com.au" class=""></div>
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<div class="">Firstly, the CIDSet is not built correctly, by not including all glyphs that are used.</div>
<div class=""> pdfTeX hs a similar problem with regard to Charset.</div>
<div class="">The issue seems to be that if an accented character is built internally from multiple glyphs,</div>
<div class="">then each of those glyphs should be included in the CIDSet, as well as the combined character.</div>
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<div class="">Acrobat’s Preflight has a filter to remove such incomplete CIDSets, so this isn’t a crucial deficiency.</div>
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<div class="">Secondly, although clearly present, the /ToUnicode CMap resource is not being found.</div>
<div class="">The font seems to be named correctly here, according to:</div>
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<blockquote type="cite" class="">
<blockquote type="cite" class="">page 279 of ISO 32000_1:2008<br class="">
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§ 9.7.6 Type 0 Font Dictionaries<br class="">
§ 9.7.6.1 General<br class="">
A Type 0 font dictionary contains the entries listed in Table 121.</div>
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Table 121 – Entries in a Type 0 font dictionary</div>
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</div>
<div class="">BaseFont name (Required) The name of the font. </div>
<div class=""> If the descendant is a Type 0 CIDFont, this name should be the concatenation of the CIDFont’s BaseFont name, a hyphen, </div>
<div class=""> and the CMap name given in the Encoding entry (or the CMapName entry in the CMap). </div>
<div class=""> If the descendant is a Type 2 CIDFont, this name should be the same as the CIDFont’s BaseFont name.</div>
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<div class="">Since this is a Type 2 CIDFont, the 2nd sentence is applicable.</div>
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<div class="">And since it is a subset of the full font, the last sentence below is also applicable.</div>
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<blockquote type="cite" class="">
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<div class="">page 285 of ISO 32000_1:2008</div>
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</div>
<div class="">§9.8.3 Font Descriptors for CIDFonts<br class="">
§9.8.3.1 General<br class="">
In addition to the entries in Table 122, the FontDescriptor dictionaries of CIDFonts may contain the entries listed in Table 124.<br class="">
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</div>
<div class=""> Table 124 – Additional font descriptor entries for CIDFonts</div>
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<div class="">CIDSet stream (Optional) A stream identifying which CIDs are present in the CIDFont file. </div>
<div class=""> If this entry is present, the CIDFont shall contain only a subset of the glyphs in the character collection defined by the CIDSystemInfo dictionary. </div>
<div class=""> If it is absent, the only indication of a CIDFont subset shall be the subset tag in the FontName entry (see 9.6.4, "Font Subsets").<br class="">
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<div class="">So I cannot see why the /ToUnicode resource is not being found.</div>
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<div class="">Would someone with more experience building fonts and subsetting, please have a look at this issue.</div>
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<div class="">Cheers,</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>Ross</div>
<br class="">
<div class=""><br class="">
Dr Ross Moore<br class="">
Mathematics Dept | 12 Wally’s Walk, 734<br class="">
Macquarie University, NSW 2109, Australia<br class="">
T: +61 2 9850 8955 | F: +61 2 9850 8114<br class="">
M:+61 407 288 255 | E: <a href="mailto:ross.moore@mq.edu.au" class="">ross.moore@mq.edu.au</a><br class="">
<br class="">
http://www.maths.mq.edu.au<br class="">
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