Simone Rondelli created FOP-2650:
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             Summary: Cache CustomFont instances 
                 Key: FOP-2650
                 URL: https://issues.apache.org/jira/browse/FOP-2650
             Project: FOP
          Issue Type: Improvement
          Components: font/unqualified
            Reporter: Simone Rondelli
            Priority: Minor


Custom fonts are loaded through the {{FontLoader}} class on every rendering 
(for every renderer). For big font files (Eg. Chinese/Japanese/Korean fonts) 
this can be a really CPU intensive operation.

The aim of this improvement is to implement a cache mechanism that will cache 
the Font Instances or the informations contained into them.

NB: The class {{Typeface}} has a {{charMapOps}} field that keeps track of the 
usage of the font during the rendering. This field is used in 
{{PDFResource.addFonts()}} to determine whether to include the Font into the 
PDF file. Caching this value will lead to problems.



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