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https://issues.apache.org/jira/browse/PDFBOX-3884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16105849#comment-16105849
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Matías Giovannini commented on PDFBOX-3884:
-------------------------------------------
This problem occurs in seven instances in total. In every case, the
corresponding {{Encoding}} classes list the _latter_ name in the Glyph List,
but the {{GlyphList}} class retains the former, leading to round-trip encoding
exceptions. As a workaround, I patch the {{Encoding}} instances using
reflection:
{code:java}
final Method method = Encoding.class.getDeclaredMethod("overwrite", int.class,
String.class);
method.setAccessible(true);
method.invoke(WinAnsiEncoding.INSTANCE, 0230, "ilde"); // tilde
method.invoke(WinAnsiEncoding.INSTANCE, 0267, "middot"); // periodcentered
method.invoke(SymbolEncoding.INSTANCE, 0042, "forall"); // universal
method.invoke(SymbolEncoding.INSTANCE, 0100, "approximatelyequal"); // congruent
method.invoke(SymbolEncoding.INSTANCE, 0127, "Ohm"); // Omega
method.invoke(SymbolEncoding.INSTANCE, 0363, "integraltop"); // integraltp
method.invoke(SymbolEncoding.INSTANCE, 0365, "integralbottom"); // integralbt
{code}
I think the intent of the glyph list is to record mappings in historical order,
so that amendments come later. The reading code should keep the last mapping
seen so that it takes it as the canonical one.
In other words, remove the conditional guarding {{unicodeToName.put(string,
name);}}:
{code:java}
- // reverse mapping
+ // reverse mapping (keep the latest name as canonical)
- if (!unicodeToName.containsKey(string))
- {
unicodeToName.put(string, name);
- }
{code}
> GlyphList registers "wrong" Adobe name for "U+02DC SMALL TILDE"
> ---------------------------------------------------------------
>
> Key: PDFBOX-3884
> URL: https://issues.apache.org/jira/browse/PDFBOX-3884
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.6
> Reporter: Matías Giovannini
> Priority: Minor
> Attachments: PDFEncodingError.java
>
>
> The Adobe Glyph List contains both "ilde;02DC" (line 2304) and "tilde;02DC"
> (line 3826), so the Unicode conversion of ExtendedRoman 0x98 (152) "small
> tilde" fails:
> java.lang.IllegalArgumentException: U+02DC ('ilde') is not available in this
> font Times-Roman encoding: WinAnsiEncoding
> at
> org.apache.pdfbox.pdmodel.font.PDType1Font.encode(PDType1Font.java:425)
> at org.apache.pdfbox.pdmodel.font.PDFont.encode(PDFont.java:323)
> at
> org.apache.pdfbox.pdmodel.PDPageContentStream.showText(PDPageContentStream.java:414)
> at pdftest.PDFEncodingError.main(PDFEncodingError.java:18)
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