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https://issues.apache.org/jira/browse/PDFBOX-4951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18083526#comment-18083526
]
Tilman Hausherr edited comment on PDFBOX-4951 at 5/26/26 5:25 PM:
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I was wondering what would happen with india (Bengali) text, and added code
that used this font: "/org/apache/pdfbox/resources/ttf/Lohit-Bengali.ttf" .
However the text "India (India)" looks like this in the PDF:
!image-2026-05-26-16-49-45-529.png!
I also modified the code to disable GSubWorker, same result.
{code:java}
public void test() {
try {
GlyphLayoutProcessor glyphLayoutProcessor = new
GlyphLayoutProcessor();
String outputFilename = "DoGlyphLayoutLigaturesAndKerning.pdf";
String firaPath =
"/org/apache/pdfbox/examples/glyphlayout/firacode/FiraCode-Regular.ttf";
String dejavuPath =
"/org/apache/pdfbox/examples/glyphlayout/dejavu/DejaVuSans.ttf";
String lohitBengaliPath =
"/org/apache/pdfbox/resources/ttf/Lohit-Bengali.ttf";
float fontSize = 12.0f;
PDDocument pdDocument = new PDDocument();
PDType0Font firaFont = createPdType0Font(glyphLayoutProcessor,
pdDocument, firaPath);
PDType0Font firaLigFont = createPdType0Font(glyphLayoutProcessor,
pdDocument, firaPath,
new GlyphLayoutFontLoader.FontOptions().setLigaturesOn());
PDType0Font dejavuFont = createPdType0Font(glyphLayoutProcessor,
pdDocument, dejavuPath);
PDType0Font dejavuLigFont = createPdType0Font(glyphLayoutProcessor,
pdDocument, dejavuPath,
new
GlyphLayoutFontLoader.FontOptions().setLigaturesOn());
PDType0Font dejavuKernFont =
createPdType0Font(glyphLayoutProcessor, pdDocument, dejavuPath,
new GlyphLayoutFontLoader.FontOptions().setKerningOn());
PDType0Font dejavuLigKernFont =
createPdType0Font(glyphLayoutProcessor, pdDocument, dejavuPath,
new
GlyphLayoutFontLoader.FontOptions().setLigaturesOn().setKerningOn());
PDType0Font lohitBengaliFont =
createPdType0Font(glyphLayoutProcessor, pdDocument, lohitBengaliPath,
new GlyphLayoutFontLoader.FontOptions());
PDPage blankPage = new PDPage();
pdDocument.addPage(blankPage);
PDPageContentStream cs = new PDPageContentStream(pdDocument,
pdDocument.getPage(0),
PDPageContentStream.AppendMode.APPEND, true);
cs.setGlyphLayoutProcessor(glyphLayoutProcessor);
float x = blankPage.getBBox().getLowerLeftX() + fontSize;
float y = blankPage.getBBox().getUpperRightY() - fontSize;
y = showComposites(cs, firaFont, fontSize, x, y, firaString);
y = showComposites(cs, firaLigFont, fontSize, x, y, firaString + "
(Ligatures)");
y = showComposites(cs, dejavuFont, fontSize, x, y, dejavuString);
y = showComposites(cs, dejavuLigFont, fontSize, x, y, dejavuString
+ " (Ligatures)");
y = showComposites(cs, dejavuKernFont, fontSize, x, y, dejavuString
+ " (Kerning)");
y = showComposites(cs, dejavuLigKernFont, fontSize, x, y,
dejavuString + " (Ligatures and kerning)");
showComposites(cs, lohitBengaliFont, fontSize, x, y, indiaString +
" (India)");
cs.close();
pdDocument.save(outputFilename);
pdDocument.close();
} catch (Exception e) {
e.printStackTrace();
}
}
{code}
was (Author: tilman):
I was wondering what would happen with india (Bengali) text, and added code
that used this font: "/org/apache/pdfbox/resources/ttf/Lohit-Bengali.ttf" .
However the text "India (India)" looks like this in the PDF:
!image-2026-05-26-16-49-45-529.png!
I also modified the code to disable GSubWorker, same result.
> Sequences of DIN SPEC 91379 with combining letters are rendered incorrectly
> ---------------------------------------------------------------------------
>
> Key: PDFBOX-4951
> URL: https://issues.apache.org/jira/browse/PDFBOX-4951
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.21
> Reporter: Volker Kunert
> Priority: Major
> Attachments: DIN_SPEC_91379_Sequences-aa.pdf,
> DIN_SPEC_91379_Sequences-ab.pdf, DIN_SPEC_91379_Sequences-ac.pdf,
> DIN_SPEC_91379_Sequences.txt, DefaultScriptProcessor.java, DejaVuSans.ttf,
> DoGlyphLayoutBidi.pdf, DoGlyphLayoutDinSpec91379.pdf,
> DoGlyphLayoutDinSpec91379Form.pdf, DoGlyphPositionBengali.pdf,
> ExamplePdfboxFopPos-By-Tilman.pdf, ExamplePdfboxFopPos.java,
> ExamplePdfboxFopPos.pdf, ExamplePdfboxFopPosForm.java,
> ExamplePdfboxFopPosForm.pdf, FiraCode-Regular.ttf, TestPdfbox.java,
> TestPdfboxFop2.java, TestPdfboxFop2.pdf, TestPdfboxJava2D.java,
> TestPdfboxJava2D.pdf, bidi-1.png, bidi-2.png, bidi.png,
> image-2026-05-23-16-16-53-442.png, image-2026-05-23-16-17-28-172.png,
> image-2026-05-26-16-49-45-529.png, ligatures-kerning.png,
> patch-2020-10-02.txt, pdfbox.patch, pdfbox.pdf, screenshot-1.png
>
>
> Accented Letters composed of Unicode base letter and combining accent are
> rendered wrong. 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.
> The position is wrong for most of the sequences defined in the following spec:
> DIN SPEC 91379: Characters in Unicode for the electronic processing of names
> and data
> exchange in Europe; with digital attachment
> [https://www.xoev.de/downloads-2316#StringLatin]
> [https://www.din.de/de/wdc-beuth:din21:301228458]
>
> The correct rendering should look like the output of hb-view 2.6.8, see files
> DIN_SPEC_91379_Sequences*.pdf.
> The output of PDFBox is appended in pdfbox.pdf, which is created by running
> TestPdfbox.java. The sequences are read from file
> DIN_SPEC_91379_Sequences.txt.
>
> 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]
> See also FOP-2969
>
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