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Posted to fop-dev@xmlgraphics.apache.org by "Simone Rondelli (JIRA)" <ji...@apache.org> on 2016/07/27 15:57:20 UTC

[jira] [Created] (FOP-2638) FOText.getScript() may prevent gsub/gpos application

Simone Rondelli created FOP-2638:
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             Summary: FOText.getScript() may prevent gsub/gpos application
                 Key: FOP-2638
                 URL: https://issues.apache.org/jira/browse/FOP-2638
             Project: FOP
          Issue Type: Bug
          Components: fo/block, layout/unqualified
    Affects Versions: trunk
         Environment: Operating System: All
Platform: All
            Reporter: Simone Rondelli


In {{GlyphMapping.processWordMapping}} the script of the text is retrieved using {{String script = text.getScript()}}.

If the script returned is not listed in the Font then  then gsub/gpos features will be ignored even if applicable.

h5. Example:

The font [EmojiOne|https://github.com/eosrei/emojione-color-font] is a font for Emoji and contains a Ligatures table for _latn_ script. Thsi is what happen when FOText.getScript is called:

* 🇮🇹👨‍👨‍👦  (Only emoji) -> script =  'zyyy'
* test🇮🇹👨‍👨‍👦  (Latin + Emoji) -> script = 'auto'
* 先秦兩漢🇮🇹👨‍👨‍👦  (Chinese + Emoji) -> script = 'auto'

In all these cases ApacheFOP is not able to apply the ligature table.

.h5 Acceptance Criteria 

Ensure ApacheFOP reads the gsub/gpos table even if the script recognized for the text differs from the one defined in the font.



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