-/** @param subtitles A list of subtitles that are all on the same line,
- * at the same time and with the same fade in/out.
- */
-static PositionImage
-render_line (list<StringText> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate)
-{
- /* XXX: this method can only handle italic / bold changes mid-line,
- nothing else yet.
- */
-
- DCPOMATIC_ASSERT (!subtitles.empty ());
-
- /* Calculate x and y scale factors. These are only used to stretch
- the font away from its normal aspect ratio.
- */
- float xscale = 1;
- float yscale = 1;
- if (fabs (subtitles.front().aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) {
- if (subtitles.front().aspect_adjust() < 1) {
- xscale = max (0.25f, subtitles.front().aspect_adjust ());
- yscale = 1;
- } else {
- xscale = 1;
- yscale = 1 / min (4.0f, subtitles.front().aspect_adjust ());
- }
- }
-
- /* Make an empty bitmap as wide as target and at
- least tall enough for this subtitle.
- */
-
- int largest = 0;
- BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
- largest = max (largest, i.size());
- }
- /* Basic guess on height... */
- int height = largest * target.height / (11 * 72);
- /* ...scaled... */
- height *= yscale;
- /* ...and add a bit more for luck */
- height += target.height / 11;