On 31 Aug 2016, at 19:24, Andreas Falkenhahn <andr...@falkenhahn.com> wrote: > > On 31.08.2016 at 20:08 Alastair Houghton wrote: > >> On 31 Aug 2016, at 15:52, Andreas Falkenhahn <andr...@falkenhahn.com> wrote: > >>> But I still don't understand how computing glyph positioning manually >>> should work around the fact that there are no APIs that measure the text >>> like ATSUI. I mean, internally, CTLineGetOffsetForStringIndex() probably >>> does exactly that, it returns the positioning obtained from >>> CTRunGetAdvances(). > >> You need to get the advances of individual glyphs, and sum the rounded >> values. > > Look at the example code I posted. It's just a single glyph in the string. > The string is just a "W”.
The problem is most likely that the “W” doesn’t start at x = 0 (have you tried calling CTLineGetOffsetForStringIndex(line, 0, NULL)?) Kind regards, Alastair. -- http://alastairs-place.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
