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https://issues.apache.org/jira/browse/PDFBOX-2923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14663113#comment-14663113
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Petras commented on PDFBOX-2923:
--------------------------------
This patch has influence on Preflight, as it checks that width of the glyph set
using the DW and W entries in the CIDFont dictionary be consistent with the
actual widths given in the CIDFont program. Without this patch Preflight fails
with errors:
{code}
ERROR_FONTS_METRICS: Invalid Font definition, Width of the character "469" in
the font program "KTZXPY+MyriadPro-Regular"is inconsistent with the width in
the PDF dictionary.,
ERROR_FONTS_GLYPH_MISSING: Glyph error, The character "508" in the font program
"KTZXPY+MyriadPro-Regular"is missing from the Charater Encoding.,
ERROR_FONTS_METRICS: Invalid Font definition, Width of the character "469" in
the font program "KOVSPY+MyriadPro-Regular"is inconsistent with the width in
the PDF dictionary.,
ERROR_FONTS_GLYPH_MISSING: Glyph error, The character "508" in the font program
"KOVSPY+MyriadPro-Regular"is missing from the Charater Encoding.]
{code}
> CFFParser parser treats CIDFont's charset data as SID
> -----------------------------------------------------
>
> Key: PDFBOX-2923
> URL: https://issues.apache.org/jira/browse/PDFBOX-2923
> Project: PDFBox
> Issue Type: Bug
> Components: FontBox
> Affects Versions: 1.8.10
> Reporter: Petras
> Attachments: MyriadPro-Regular.cff, Patch_to_fix_PDFBOX-2923.patch
>
>
> As stated in Compact Font File specification:
> {quote}
> The charset data, although in the same format as non-CIDFonts, will represent
> CIDs rather than SIDs, i.e. charstrings are “named” by CIDs in a CIDFont.
> {quote}
> Unfortunately, {{CFFParser}} does not consider this specific and always treat
> charset data as SID: is looking for SID referenced text in _String INDEX_
> structure. Since such SID-indexed string does not exist there, it sets the
> name of the glyph to "{{.ndef}}".
> Consequently, {{CFFParser}} fails to register correct charstrings, as it
> associates glyph names to them using a map. As there can be several
> charstrings, only the last charstring entry is retained.
> Then also {{CFFFont.getWidth()}} method fails to return correct width of the
> given CID as correct link between CID and charstring is lost.
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