While looking for ways to improve / extend font support via Qt, I found this Stack Overflow post: http://stackoverflow.com/questions/24673444/which-opentype-gsub-features-does-qt-4-8-support (which, its title notwithstanding, also deals with GPOS features, like "kern", and also covers 5.3).
I have no idea how reliable this info is, but it may show a potential way to go. Notes: 1) The set of OT features supported by the custom-compiled' Qt 5.3 lacks the feature(s) I believe to be most important for our main application field (musical glyphs), i.e. the stylistic alternates (feature "salt") and the stylistic sets (features "ss01" - "ss20"). 2) It also lacks features which are of great importance for a proper typographic rendition, like small caps (feature "smcp") and 'old style numerals' (features "pnum" and "onum"). 3) The post also gives a reason for the different behaviour of Qt font management under OSX. I see two possible strategies: A) By-passing Qt font management altogether, directly accessing the underlying font stack, to free us from the recurring bugs of this Qt area, from the apparent lack of interest in it from the Qt dev team and from the special OSX case. On the spot, I have no clear idea how possible / feasible this would be. It seems very likely it will be far from simple, both on the side of OT support itself and on the side of integrating 'our' code with Qt drawing primitives. B) Improving Qt support by fixing bugs potentially still there and adding more OT features to the 'experimental' Harbuzz support by Qt. This also would not be simple, but the coding part could follow established practices and patterns of the existing Qt code base. This would however require some commitment and recurring work to keep up with on-going Qt development, until 'our' improvements are not back-ported to main Qt, if this is at all likely to happen. Also, it would probably not address the special treatment of OSX. In any case, it would be a rather medium-to-long term project. Comments and suggestions are welcome. Thanks, Maurizio -- View this message in context: http://dev-list.musescore.org/Qt-and-OpenType-tp7579162.html Sent from the MuseScore Developer mailing list archive at Nabble.com. ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Mscore-developer mailing list Mscore-developer@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mscore-developer
