[jira] [Created] (FOP-2969) Accented Letters composed of Unicode base letter and combining accent are rendered wrong as the first letter of a word.

["Volker Kunert (Jira)" <ji...@apache.org>]

Volker Kunert created FOP-2969:
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             Summary: Accented Letters composed of Unicode base letter and combining accent are rendered  wrong as the first letter of a word.
                 Key: FOP-2969
                 URL: https://issues.apache.org/jira/browse/FOP-2969
             Project: FOP
          Issue Type: Bug
          Components: renderer/pdf
    Affects Versions: 2.4, trunk
            Reporter: Volker Kunert
         Attachments: TestFop.java, fop.xconf, test-din-spec-sequences.fo, test-din-spec-sequences.fo.pdf

E.g. with 0041 030B LATIN CAPITAL LETTER A WITH COMBINING DOUBLE ACUTE ACCENT the accent E.g. with 0041 030B LATIN CAPITAL LETTER A WITH COMBINING DOUBLE ACUTE ACCENT the accent appears at the right hand side of the letter A, not above the letter A.

If e.g. an "X" is prepended, the sequence is rendered correctly.


The tested sequences are used in the following specification:

DIN SPEC 91379: Characters in Unicode for the electronic processing of names and dataexchange in Europe; with digital attachment

[https://www.xoev.de/downloads-2316#StringLatin]

https://www.din.de/de/wdc-beuth:din21:301228458

The output of FOP is provided in test-din-spec-sequences.fo.pdf, which is created by running TestFop.java that processes test-din-spec-sequences.fo.  


Font used for testing: NotoSansMono-Regular.ttf, see https://www.google.com/get/noto/ 
download: https://noto-website-2.storage.googleapis.com/pkgs/NotoSansMono-hinted.zip

 The following dirty patch seems to resolv the problem for my test case:

(delete "{{&& (unscaledWidths[index] != 0").}}

 
{code:java}
--- ./trunk/fop-core/src/main/java/org/apache/fop/complexscripts/scripts/DefaultScriptProcessor.java 2020-09-03 16:20:03.442089088 +0200--- ./trunk/fop-core/src/main/java/org/apache/fop/complexscripts/scripts/DefaultScriptProcessor.java 2020-09-03 16:20:03.442089088 +0200
+++ /home/volker/software/xmlgraphics-fop-trunk/fop-core/src/main/java/org/apache/fop/complexscripts/scripts/DefaultScriptProcessor.java 2020-09-03 16:37:40.781775907 +0200
@@ -151,7 +151,7 @@
     }      
protected boolean isReorderedMark(GlyphDefinitionTable gdef, int[] glyphs, int[] unscaledWidths, int index) {
-        return gdef.isGlyphClass(glyphs[index], GlyphDefinitionTable.GLYPH_CLASS_MARK) && (unscaledWidths[index] != 0);
+        return gdef.isGlyphClass(glyphs[index], GlyphDefinitionTable.GLYPH_CLASS_MARK);      }  }

{code}



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