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ASF subversion and git services commented on PDFBOX-4106: --------------------------------------------------------- Commit 1824338 from [~tilman] in branch 'pdfbox/branches/2.0' [ https://svn.apache.org/r1824338 ] PDFBOX-4106: add cmap lookup interface, by Aaron Madlon-Kay > Vertical text creation > ---------------------- > > Key: PDFBOX-4106 > URL: https://issues.apache.org/jira/browse/PDFBOX-4106 > Project: PDFBox > Issue Type: New Feature > Components: FontBox, Parsing, Writing > Reporter: Aaron Madlon-Kay > Priority: Major > Labels: embed, gsub, parsing, vertical > Attachments: > 0001-Add-OpenTypeScript-class-to-get-OT-script-tags-for-c.patch, > 0002-Optimize-Unicode-script-storage-and-lookup.patch, > 0003-Parse-GSUB-table.patch, > 0004-Abstract-cmap-lookup-into-an-interface.patch, > 0005-Implement-GSUB-substitution-on-TrueTypeFont.patch, > 0006-Use-vhea-vmtx-to-fix-vertical-displacements-in-PCIDF.patch, > 0007-Add-factory-methods-for-loading-TTF-as-vertical-font.patch, > 0008-Implement-vertical-metrics-support-when-embedding-subsetting.patch, > sample_code.txt, vertical.pdf > > > I needed to output vertical Japanese text, but was stymied by several > limitations: > * No API to load a TTF as Identity-V encoding > * No support for 'vert' glyph substitution > * No support for vertical metrics ('vhea' and 'vmtx' tables are parsed but > not used at all) > I have attached a series of patches that implement the above features. > Highlights: > * The GSUB glyph substitution table is parsed (limitation: type 1 lookups > only; this is sufficient for many features including 'vert'/'vrt2' vertical > glyph substitution) > * Cmap lookup makes use of GSUB when features are enabled on a TTF > * 'vhea' and 'vmtx' metrics are applied to PDCIDFont when appropriate, and > are embedded/subsetted correctly through the DW2/W2 CIDFont dictionary > * An API has been added for loading a TTF as a vertical font, setting > Identity-V encoding and enabling 'vert'/'vrt2' substitution > Each patch could approximately be split out into a separate ticket, if > desired. > Also attached is some sample code that exercises these patches and > illustrates the effect of vertical glyph positioning. The sample output PDF > is also attached. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org