Alfred created PDFBOX-4909:
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Summary: Don't calculate font height for every glyph
Key: PDFBOX-4909
URL: https://issues.apache.org/jira/browse/PDFBOX-4909
Project: PDFBox
Issue Type: Improvement
Components: Text extraction
Affects Versions: 2.0.0, 3.0.0 PDFBox
Reporter: Alfred
LegacyPDFStreamEngine computes font height for every glyph and the computation
is rather heavy, to work around all known problems.
Instead of computing for every glyph, we can recompute only when the font
changes. The SetFontAndSize operator will be invoked when the font changes so
we can use that to compute and store the height to have it ready when needed in
showGlyph.
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