This test shows the following bugs with text-orientation. The far right test mis-renders differently in both the simple and complex text paths. The simple text path mis-renders because CTFontGetVerticalTranslationsForGlyphs returns incorrect values for horizontal glyphs that have vertical counterparts. The complex text code path mis-renders because of API deficiency. There is no way to tell CoreText to use upright horizontal glyphs when rendering a vertical line.