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-rw-r--r--src/lib/reel_writer.cc29
-rw-r--r--src/lib/reel_writer.h4
-rw-r--r--src/lib/render_text.cc68
-rw-r--r--src/lib/render_text.h41
4 files changed, 138 insertions, 4 deletions
diff --git a/src/lib/reel_writer.cc b/src/lib/reel_writer.cc
index f9e29a16f..94b12ec7d 100644
--- a/src/lib/reel_writer.cc
+++ b/src/lib/reel_writer.cc
@@ -114,6 +114,7 @@ ReelWriter::ReelWriter (
, _content_summary (film()->content_summary(period))
, _job (job)
, _text_only (text_only)
+ , _font_metrics(film()->frame_size().height)
{
/* Create or find our picture asset in a subdirectory, named
according to those film's parameters which affect the video
@@ -889,6 +890,33 @@ ReelWriter::empty_text_asset (TextType type, optional<DCPTextTrack> track, bool
}
+float
+ReelWriter::convert_vertical_position(StringText const& subtitle, dcp::Standard to) const
+{
+ if (subtitle.valign_standard == to) {
+ return subtitle.v_position();
+ }
+
+ auto const baseline_to_bottom = _font_metrics.baseline_to_bottom(subtitle);
+ auto const height = _font_metrics.height(subtitle);
+
+ float correction = 0;
+ switch (subtitle.v_align()) {
+ case dcp::VAlign::TOP:
+ correction = height - baseline_to_bottom;
+ break;
+ case dcp::VAlign::CENTER:
+ correction = (height / 2) - baseline_to_bottom;
+ break;
+ case dcp::VAlign::BOTTOM:
+ correction = baseline_to_bottom;
+ break;
+ }
+
+ return subtitle.v_position() + ((subtitle.valign_standard == dcp::Standard::SMPTE) ? correction : -correction);
+}
+
+
void
ReelWriter::write (PlayerText subs, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period, FontIdMap const& fonts)
{
@@ -928,6 +956,7 @@ ReelWriter::write (PlayerText subs, TextType type, optional<DCPTextTrack> track,
for (auto i: subs.string) {
i.set_in (dcp::Time(period.from.seconds() - _period.from.seconds(), tcr));
i.set_out (dcp::Time(period.to.seconds() - _period.from.seconds(), tcr));
+ i.set_v_position(convert_vertical_position(i, film()->interop() ? dcp::Standard::INTEROP : dcp::Standard::SMPTE));
auto sub = make_shared<dcp::SubtitleString>(i);
if (type == TextType::OPEN_SUBTITLE) {
sub->set_font(fonts.get(i.font));
diff --git a/src/lib/reel_writer.h b/src/lib/reel_writer.h
index e2c713cc5..d5b531f41 100644
--- a/src/lib/reel_writer.h
+++ b/src/lib/reel_writer.h
@@ -26,6 +26,7 @@
#include "font_id_map.h"
#include "player_text.h"
#include "referenced_reel_asset.h"
+#include "render_text.h"
#include "types.h"
#include "weak_film.h"
#include <dcp/atmos_asset_writer.h>
@@ -121,6 +122,7 @@ private:
std::set<DCPTextTrack> ensure_closed_captions
) const;
void create_reel_markers (std::shared_ptr<dcp::Reel> reel) const;
+ float convert_vertical_position(StringText const& subtitle, dcp::Standard to) const;
dcpomatic::DCPTimePeriod _period;
/** the first picture frame index that does not already exist in our MXF */
@@ -147,5 +149,7 @@ private:
std::shared_ptr<dcp::AtmosAsset> _atmos_asset;
std::shared_ptr<dcp::AtmosAssetWriter> _atmos_asset_writer;
+ mutable FontMetrics _font_metrics;
+
static int const _info_size;
};
diff --git a/src/lib/render_text.cc b/src/lib/render_text.cc
index 9c1c233c2..d3db4ac19 100644
--- a/src/lib/render_text.cc
+++ b/src/lib/render_text.cc
@@ -171,12 +171,12 @@ create_surface (shared_ptr<Image> image)
static string
-setup_font (StringText const& subtitle)
+setup_font(shared_ptr<const dcpomatic::Font> font)
{
auto font_file = default_font_file ();
- if (subtitle.font && subtitle.font->file()) {
- font_file = *subtitle.font->file();
+ if (font && font->file()) {
+ font_file = *font->file();
}
return FontConfig::instance()->make_font_available(font_file);
@@ -299,7 +299,7 @@ render_line (list<StringText> subtitles, dcp::Size target, DCPTime time, int fra
DCPOMATIC_ASSERT (!subtitles.empty ());
auto const& first = subtitles.front ();
- auto const font_name = setup_font (first);
+ auto const font_name = setup_font(first.font);
auto const fade_factor = calculate_fade_factor (first, time, frame_rate);
auto const markup = marked_up (subtitles, target.height, fade_factor, font_name);
auto layout = create_layout ();
@@ -402,3 +402,63 @@ render_text (list<StringText> subtitles, dcp::Size target, DCPTime time, int fra
return images;
}
+
+
+float
+FontMetrics::height(StringText const& subtitle)
+{
+ return get(subtitle)->second.second;
+}
+
+
+float
+FontMetrics::baseline_to_bottom(StringText const& subtitle)
+{
+ return get(subtitle)->second.first;
+}
+
+
+FontMetrics::Cache::iterator
+FontMetrics::get(StringText const& subtitle)
+{
+ auto id = Identifier(subtitle);
+
+ auto iter = _cache.find(id);
+ if (iter != _cache.end()) {
+ return iter;
+ }
+
+ auto const font_name = setup_font(subtitle.font);
+ auto layout = create_layout();
+ auto copy = subtitle;
+ copy.set_text("Qypjg");
+ setup_layout(layout, font_name, marked_up({copy}, _target_height, 1, font_name));
+ auto ink = layout->get_ink_extents();
+ auto const scale = float(_target_height * Pango::SCALE);
+ return _cache.insert({id, { ink.get_y() / scale, ink.get_height() / scale}}).first;
+}
+
+
+FontMetrics::Identifier::Identifier(StringText const& subtitle)
+ : font(subtitle.font)
+ , size(subtitle.size())
+ , aspect_adjust(subtitle.aspect_adjust())
+{
+
+}
+
+
+bool
+FontMetrics::Identifier::operator<(FontMetrics::Identifier const& other) const
+{
+ if (font != other.font) {
+ return font < other.font;
+ }
+
+ if (size != other.size) {
+ return size < other.size;
+ }
+
+ return aspect_adjust < other.aspect_adjust;
+}
+
diff --git a/src/lib/render_text.h b/src/lib/render_text.h
index 6ff91dce1..762d79446 100644
--- a/src/lib/render_text.h
+++ b/src/lib/render_text.h
@@ -18,14 +18,55 @@
*/
+
#include "position_image.h"
#include "dcpomatic_time.h"
#include "string_text.h"
#include <dcp/util.h>
+#include <memory>
+
namespace dcpomatic {
class Font;
}
+
std::string marked_up (std::list<StringText> subtitles, int target_height, float fade_factor, std::string font_name);
std::list<PositionImage> render_text (std::list<StringText>, dcp::Size, dcpomatic::DCPTime, int);
+
+
+class FontMetrics
+{
+public:
+ FontMetrics(int target_height)
+ : _target_height(target_height)
+ {}
+
+ float baseline_to_bottom(StringText const& subtitle);
+ float height(StringText const& subtitle);
+
+private:
+ /** Class to collect the properties of a subtitle which affect the metrics we care about
+ * i.e. baseline position and height.
+ */
+ class Identifier
+ {
+ public:
+ Identifier(StringText const& subtitle);
+
+ std::shared_ptr<dcpomatic::Font> font;
+ int size;
+ float aspect_adjust;
+
+ bool operator<(Identifier const& other) const;
+ };
+
+ using Cache = std::map<Identifier, std::pair<float, float>>;
+
+ Cache::iterator get(StringText const& subtitle);
+
+ Cache _cache;
+
+ int _target_height;
+};
+
generated by cgit v1.2.3 (git 2.46.0) at 2026-04-09 07:24:50 +0000