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https://issues.apache.org/jira/browse/PDFBOX-4189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16457951#comment-16457951
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Maruan Sahyoun commented on PDFBOX-4189:
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[~tilman] [~paawak] could we get a method which returns the glyphs/ids/code to
use together with the metrics information for a string? This way we could get
the neccessary information to do line breaking etc in one go instead of calling
{{PDFont.getStringWidth()}} {{PDFont.getWidths()}} and then doing the same
again when {{showText}} is called by running through {{PDFont.encode()}}.
There might be additional information we store such as the later on such as
baseline adjustment.
We could utilize {{java.text.AttributedString}} with our own implementation of
{{java.text.AttributedCharacterIterator}} e.g. similar to
{{java.awt.font.TextAttribute}}. One issue I see is with subsetting as when
getting the font information you won't know that the text will be shown e.g.
if the text doesn't fit within a text box one might drop some of the characters.
It would also need an additional version of {{showText}} as we already have the
information for the encoded text.
WDYT?
> Enable PDF creation with Indian languages, by reading and utilizing the GSUB
> table
> ----------------------------------------------------------------------------------
>
> Key: PDFBOX-4189
> URL: https://issues.apache.org/jira/browse/PDFBOX-4189
> Project: PDFBox
> Issue Type: New Feature
> Components: FontBox, PDModel
> Reporter: Palash Ray
> Priority: Major
> Attachments: Bengali-text-after.pdf, Bengali-text-before.pdf,
> BengaliPdfGenerationHelloWorld.java, bengali-example.pdf,
> bengali-example2.pdf, bengali-example3.pdf, committed.patch, screenshot.png
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> Implemented proper rendering of Indian languages, which need extensive Glyph
> substitution. The GSUB table has been read and used effectively to replace
> some compound words with their respective Glyphs. All tests are passing. I
> have tested this for the Bengali font. Please review these changes and let me
> know if it makes sense to incorporate these.
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