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diff --git a/src/lib/content_text.h b/src/lib/content_text.h
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+/*
+    Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#ifndef DCPOMATIC_CONTENT_TEXT_H
+#define DCPOMATIC_CONTENT_TEXT_H
+
+#include "dcpomatic_time.h"
+#include "rect.h"
+#include "bitmap_text.h"
+#include <dcp/subtitle_string.h>
+#include <list>
+
+class Image;
+
+class ContentText
+{
+public:
+       explicit ContentText (ContentTime f)
+               : _from (f)
+       {}
+
+       ContentTime from () const {
+               return _from;
+       }
+
+private:
+       ContentTime _from;
+};
+
+class ContentBitmapText : public ContentText
+{
+public:
+       ContentBitmapText (ContentTime f, boost::shared_ptr<Image> im, dcpomatic::Rect<double> r)
+               : ContentText (f)
+               , sub (im, r)
+       {}
+
+       /* Our text, with its rectangle unmodified by any offsets or scales that the content specifies */
+       BitmapText sub;
+};
+
+/** A text subtitle.  We store the time period separately (as well as in the dcp::SubtitleStrings)
+ *  as the dcp::SubtitleString timings are sometimes quite heavily quantised and this causes problems
+ *  when we want to compare the quantised periods to the unquantised ones.
+ */
+class ContentPlainText : public ContentText
+{
+public:
+       ContentPlainText (ContentTime f, std::list<dcp::SubtitleString> s)
+               : ContentText (f)
+               , subs (s)
+       {}
+
+       std::list<dcp::SubtitleString> subs;
+};
+
+#endif