New methods table() and set_fallback_fonts() - keep_aspect_ratio - ICC Profiles

Added

• new method FPDF.table(): documentation
• FPDF.image() has a new keep_aspect_ratio optional boolean parameter, to fit it inside a given rectangle: documentation
• FPDF.multi_cell() and FPDF.write() now accept a wrapmode argument for word or character based line wrapping ("WORD"/"CHAR").
• new methods: FPDF.preload_image() & FPDF.use_font_style()
• new method FPDF.set_fallback_fonts() allow alternative fonts to be provided if a character on the text is not available on the currently set font - thanks to @andersonhc
• for inserted images that have an ICC Profile, this profile is now extracted and embedded; they should now be honored by PDF viewers - thanks to @eroux
• new translation of the tutorial in 简体中文 - thanks to @Bubbu0129
• documentation on how to embed static Plotly charts: link to docs
• additional linter / static code analyser in GitHub Actions CI pipeline: semgrep

Fixed

• outlines & hyperlinks were not working on encrypted files - thanks to @andersonhc
• a bug was introduced in the previous release (2.6.1): FPDF.set_link() could not update links generated with add_link()
• unicode (non limited to ASCII) text can now be provided as metadata #685
• all TitleStyle constructor parameters are now effectively optional
• memory usage was reduced by 10 MiB in some cases, thanks to a small optimization in using fonttools

Changed

• FPDF.write_html() now uses the new FPDF.table() method to render <table> tags. As a consequence, vertical space before <table> tags has sometimes been reduced.

• vector images parsing is now more robust: fpdf2 can now embed SVG files without viewPort or no height / width
• bitonal images are now encoded using CCITTFaxDecode, reducing their size in the PDF document - thanks to @eroux
• when possible, JPG and group4 encoded TIFFs are now embedded directly without recompression - thanks to @eroux

Removed

• FPDF.write_html() now uses the new FPDF.table() method to render <table> tags. As a consequence, it does not support the height attribute defined on <td> / <th> tags anymore, nor height / width attributes defined on <img> tags inside cells, nor width attributes defined on <thead> / <tfoot> tags.