+ std::shared_ptr<dcpomatic::Font> font;
+
+ /** Interop and SMPTE use the same VAlign choices (top, center, bottom) but give them different
+ * meanings. To add some extra confusion, it seems that SMPTE changed their minds on this topic
+ * between the 2010 and 2014 versions of standard 428-7, so there isn't even one answer for SMPTE.
+ *
+ * This is the standard which should be used to interpret v_align() in this subtitle.
+ *
+ * valign_standard == SMPTE_{2007,2010} means:
+ * top - top of screen to top of subtitle
+ * center - centre of screen to center of subtitle
+ * bottom - bottom of screen to bottom of subtitle
+ *
+ * valign_standard == {INTEROP,SMPTE_2014} means:
+ * top - top of screen to baseline of subtitle
+ * center - centre of screen to baseline of subtitle
+ * bottom - bottom of screen to baseline of subtitle
+ */
+ dcp::SubtitleStandard valign_standard;