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1. (WO2017151404) CONDITIONAL DETERMINATION OF LOOKUPS IN GLYPH PROCESSING

Pub. No.:    WO/2017/151404    International Application No.:    PCT/US2017/019230
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Feb 25 00:59:59 CET 2017
IPC: G06F 17/21
Applicants: MICROSOFT TECHNOLOGY LICENSING, LLC
Inventors: CONSTABLE, Peter Geoffrey
MALKIN, Sergey Z.
SHANBHAG, Shrinath
MCKAUGHAN, Robert Matthew
ROBINSON, Frank Dwayne
HITCHCOCK, Gregory
CHAOWEERAPRASIT, Worachai
Title: CONDITIONAL DETERMINATION OF LOOKUPS IN GLYPH PROCESSING
Abstract:
Conditional determination of glyph substitution (GSUB) lookups or glyph positioning (GPOS) lookups in the process of rendering a string of text as a sequence of glyphs is described. A process can include receiving a string of text comprising a sequence of characters, obtaining a sequence of glyph identifiers (IDs) corresponding to the sequence of characters, and determining that a context of the string of text satisfies a condition. Based at least in part on the context satisfying the condition, an alternate lookup can be determined and executed in lieu of a default lookup. Execution of the alternate lookup causes a GSUB operation or a GPOS operation to be performed on the sequence of glyph IDs to ultimately cause the string of text to be rendered on a display as a sequence of glyphs with a typographical feature applied thereto.