+ reset ();
+}
+
+void
+SubtitleDecoder::reset ()
+{
+ _decoded_text.clear ();
+ _decoded_image.clear ();
+}
+
+void
+SubtitleDecoder::give_text (ContentTimePeriod period, sub::Subtitle const & subtitle)
+{
+ /* See if our next subtitle needs to be placed on screen by us */
+ bool needs_placement = false;
+ optional<int> bottom_line;
+ BOOST_FOREACH (sub::Line i, subtitle.lines) {
+ if (!i.vertical_position.reference || i.vertical_position.reference.get() == sub::TOP_OF_SUBTITLE) {
+ needs_placement = true;
+ DCPOMATIC_ASSERT (i.vertical_position.line);
+ if (!bottom_line || bottom_line.get() < i.vertical_position.line.get()) {
+ bottom_line = i.vertical_position.line.get();
+ }
+ }
+ }
+
+ /* Find the lowest proportional postion */
+ optional<float> lowest_proportional;
+ BOOST_FOREACH (sub::Line i, subtitle.lines) {
+ if (i.vertical_position.proportional) {
+ if (!lowest_proportional) {
+ lowest_proportional = i.vertical_position.proportional;
+ } else {
+ lowest_proportional = min (lowest_proportional.get(), i.vertical_position.proportional.get());
+ }
+ }
+ }
+
+ list<dcp::SubtitleString> out;
+ BOOST_FOREACH (sub::Line i, subtitle.lines) {
+ BOOST_FOREACH (sub::Block j, i.blocks) {
+
+ if (!j.font_size.specified()) {
+ /* Fallback default font size if none other has been specified */
+ j.font_size.set_points (48);
+ }
+
+ float v_position;
+ dcp::VAlign v_align;
+ if (needs_placement) {
+ DCPOMATIC_ASSERT (i.vertical_position.line);
+ /* This 1.015 is an arbitrary value to lift the bottom sub off the bottom
+ of the screen a bit to a pleasing degree.
+ */
+ v_position = 1.015 -
+ (1 + bottom_line.get() - i.vertical_position.line.get())
+ * 1.2 * content()->line_spacing() * content()->y_scale() * j.font_size.proportional (72 * 11);
+
+ v_align = dcp::VALIGN_TOP;
+ } else {
+ DCPOMATIC_ASSERT (i.vertical_position.proportional);
+ DCPOMATIC_ASSERT (i.vertical_position.reference);
+ v_position = i.vertical_position.proportional.get();
+
+ if (lowest_proportional) {
+ /* Adjust line spacing */
+ v_position = ((v_position - lowest_proportional.get()) * content()->line_spacing()) + lowest_proportional.get();
+ }
+
+ switch (i.vertical_position.reference.get()) {
+ case sub::TOP_OF_SCREEN:
+ v_align = dcp::VALIGN_TOP;
+ break;
+ case sub::CENTRE_OF_SCREEN:
+ v_align = dcp::VALIGN_CENTER;
+ break;
+ case sub::BOTTOM_OF_SCREEN:
+ v_align = dcp::VALIGN_BOTTOM;
+ break;
+ default:
+ v_align = dcp::VALIGN_TOP;
+ break;
+ }
+ }
+
+ dcp::Effect effect = dcp::NONE;
+ if (content()->outline()) {
+ effect = dcp::BORDER;
+ } else if (content()->shadow()) {
+ effect = dcp::SHADOW;
+ }
+
+ out.push_back (
+ dcp::SubtitleString (
+ string(TEXT_FONT_ID),
+ j.italic,
+ j.bold,
+ j.underline,
+ /* force the colour to whatever is configured */
+ content()->colour(),
+ j.font_size.points (72 * 11),
+ 1.0,
+ dcp::Time (period.from.seconds(), 1000),
+ dcp::Time (period.to.seconds(), 1000),
+ 0,
+ dcp::HALIGN_CENTER,
+ v_position,
+ v_align,
+ dcp::DIRECTION_LTR,
+ j.text,
+ effect,
+ content()->effect_colour(),
+ dcp::Time (0, 1000),
+ dcp::Time (0, 1000)
+ )
+ );
+ }
+ }
+
+ give_text (period, out);