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-rw-r--r--src/lib/render_subtitles.cc131
1 files changed, 94 insertions, 37 deletions
diff --git a/src/lib/render_subtitles.cc b/src/lib/render_subtitles.cc
index f507238fb..9b5f585e5 100644
--- a/src/lib/render_subtitles.cc
+++ b/src/lib/render_subtitles.cc
@@ -22,6 +22,7 @@
#include "image.h"
#include "cross.h"
#include "font.h"
+#include "dcpomatic_assert.h"
#include <cairomm/cairomm.h>
#include <pangomm.h>
#include <boost/foreach.hpp>
@@ -39,23 +40,30 @@ using boost::shared_ptr;
using boost::optional;
static FcConfig* fc_config = 0;
-static list<pair<boost::filesystem::path, string> > fc_config_fonts;
+static list<pair<FontFiles, string> > fc_config_fonts;
+/** @param subtitles A list of subtitles that are all on the same line */
static PositionImage
-render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > fonts, dcp::Size target)
+render_line (list<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
{
+ /* 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 (subtitle.aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) {
- if (subtitle.aspect_adjust() < 1) {
- xscale = max (0.25f, subtitle.aspect_adjust ());
+ 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, subtitle.aspect_adjust ());
+ yscale = 1 / min (4.0f, subtitles.front().aspect_adjust ());
}
}
@@ -64,7 +72,7 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
*/
/* Basic guess on height... */
- int height = subtitle.size() * target.height / (11 * 72);
+ int height = subtitles.front().size() * target.height / (11 * 72);
/* ...scaled... */
height *= yscale;
/* ...and add a bit more for luck */
@@ -87,22 +95,36 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
fc_config = FcConfigCreate ();
}
- boost::filesystem::path font_file;
+ FontFiles font_files;
+
try {
- font_file = shared_path () / "LiberationSans-Regular.ttf";
+ font_files.set (FontFiles::NORMAL, shared_path () / "LiberationSans-Regular.ttf");
+ font_files.set (FontFiles::ITALIC, shared_path () / "LiberationSans-Italic.ttf");
+ font_files.set (FontFiles::BOLD, shared_path () / "LiberationSans-Bold.ttf");
} catch (boost::filesystem::filesystem_error& e) {
- /* Hack: try the debian/ubuntu location if getting the shared path failed */
- font_file = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
+
+ }
+
+ /* Hack: try the debian/ubuntu locations if getting the shared path failed */
+
+ if (!font_files.get(FontFiles::NORMAL) || !boost::filesystem::exists(font_files.get(FontFiles::NORMAL).get())) {
+ font_files.set (FontFiles::NORMAL, "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf");
+ }
+ if (!font_files.get(FontFiles::ITALIC) || !boost::filesystem::exists(font_files.get(FontFiles::ITALIC).get())) {
+ font_files.set (FontFiles::ITALIC, "/usr/share/fonts/truetype/liberation/LiberationSans-Italic.ttf");
+ }
+ if (!font_files.get(FontFiles::BOLD) || !boost::filesystem::exists(font_files.get(FontFiles::BOLD).get())) {
+ font_files.set (FontFiles::BOLD, "/usr/share/fonts/truetype/liberation/LiberationSans-Bold.ttf");
}
BOOST_FOREACH (shared_ptr<Font> i, fonts) {
- if (i->id() == subtitle.font() && i->file ()) {
- font_file = i->file().get ();
+ if (i->id() == subtitles.front().font() && i->file(FontFiles::NORMAL)) {
+ font_files = i->files ();
}
}
- list<pair<boost::filesystem::path, string> >::const_iterator existing = fc_config_fonts.begin ();
- while (existing != fc_config_fonts.end() && existing->first != font_file) {
+ list<pair<FontFiles, string> >::const_iterator existing = fc_config_fonts.begin ();
+ while (existing != fc_config_fonts.end() && existing->first != font_files) {
++existing;
}
@@ -111,9 +133,16 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
font_name = existing->second;
} else {
/* Make this font available to DCP-o-matic */
- FcConfigAppFontAddFile (fc_config, reinterpret_cast<FcChar8 const *> (font_file.string().c_str ()));
+ for (int i = 0; i < FontFiles::VARIANTS; ++i) {
+ if (font_files.get(static_cast<FontFiles::Variant>(i))) {
+ FcConfigAppFontAddFile (
+ fc_config,
+ reinterpret_cast<FcChar8 const *> (font_files.get(static_cast<FontFiles::Variant>(i)).get().string().c_str())
+ );
+ }
+ }
- FcPattern* pattern = FcPatternBuild (0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *> (0));
+ FcPattern* pattern = FcPatternBuild (0, FC_FILE, FcTypeString, font_files.get(FontFiles::NORMAL).get().string().c_str(), static_cast<char *> (0));
FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
FcFontSet* font_set = FcFontList (fc_config, pattern, object_set);
if (font_set) {
@@ -137,7 +166,7 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
FcObjectSetDestroy (object_set);
FcPatternDestroy (pattern);
- fc_config_fonts.push_back (make_pair (font_file, font_name));
+ fc_config_fonts.push_back (make_pair (font_files, font_name));
}
FcConfigSetCurrent (fc_config);
@@ -151,12 +180,29 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
/* Render the subtitle at the top left-hand corner of image */
Pango::FontDescription font (font_name);
- font.set_absolute_size (subtitle.size_in_pixels (target.height) * PANGO_SCALE);
- if (subtitle.italic ()) {
- font.set_style (Pango::STYLE_ITALIC);
- }
+ font.set_absolute_size (subtitles.front().size_in_pixels (target.height) * PANGO_SCALE);
layout->set_font_description (font);
- layout->set_text (subtitle.text ());
+
+ string marked_up;
+ bool italic = false;
+ BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
+ if (i.italic() != italic) {
+ if (i.italic()) {
+ marked_up += "<i>";
+ } else {
+ marked_up += "</i>";
+ }
+ italic = i.italic ();
+ }
+
+ marked_up += i.text ();
+ }
+
+ if (italic) {
+ marked_up += "</i>";
+ }
+
+ layout->set_markup (marked_up);
/* Compute fade factor */
/* XXX */
@@ -166,9 +212,9 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
context->scale (xscale, yscale);
- if (subtitle.effect() == dcp::SHADOW) {
+ if (subtitles.front().effect() == dcp::SHADOW) {
/* Drop-shadow effect */
- dcp::Colour const ec = subtitle.effect_colour ();
+ dcp::Colour const ec = subtitles.front().effect_colour ();
context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
context->move_to (4, 4);
layout->add_to_cairo_context (context);
@@ -177,15 +223,15 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
/* The actual subtitle */
- dcp::Colour const c = subtitle.colour ();
+ dcp::Colour const c = subtitles.front().colour ();
context->set_source_rgba (float(c.r) / 255, float(c.g) / 255, float(c.b) / 255, fade_factor);
context->move_to (0, 0);
layout->add_to_cairo_context (context);
context->fill ();
- if (subtitle.effect() == dcp::BORDER) {
+ if (subtitles.front().effect() == dcp::BORDER) {
/* Border effect */
- dcp::Colour ec = subtitle.effect_colour ();
+ dcp::Colour ec = subtitles.front().effect_colour ();
context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
context->move_to (0, 0);
layout->add_to_cairo_context (context);
@@ -197,34 +243,34 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
layout->get_size (layout_width, layout_height);
int x = 0;
- switch (subtitle.h_align ()) {
+ switch (subtitles.front().h_align ()) {
case dcp::HALIGN_LEFT:
/* h_position is distance between left of frame and left of subtitle */
- x = subtitle.h_position() * target.width;
+ x = subtitles.front().h_position() * target.width;
break;
case dcp::HALIGN_CENTER:
/* h_position is distance between centre of frame and centre of subtitle */
- x = (0.5 + subtitle.h_position()) * target.width - layout_width / (PANGO_SCALE * 2);
+ x = (0.5 + subtitles.front().h_position()) * target.width - layout_width / (PANGO_SCALE * 2);
break;
case dcp::HALIGN_RIGHT:
/* h_position is distance between right of frame and right of subtitle */
- x = (1.0 - subtitle.h_position()) * target.width - layout_width / PANGO_SCALE;
+ x = (1.0 - subtitles.front().h_position()) * target.width - layout_width / PANGO_SCALE;
break;
}
int y = 0;
- switch (subtitle.v_align ()) {
+ switch (subtitles.front().v_align ()) {
case dcp::VALIGN_TOP:
/* v_position is distance between top of frame and top of subtitle */
- y = subtitle.v_position() * target.height;
+ y = subtitles.front().v_position() * target.height;
break;
case dcp::VALIGN_CENTER:
/* v_position is distance between centre of frame and centre of subtitle */
- y = (0.5 + subtitle.v_position()) * target.height - layout_height / (PANGO_SCALE * 2);
+ y = (0.5 + subtitles.front().v_position()) * target.height - layout_height / (PANGO_SCALE * 2);
break;
case dcp::VALIGN_BOTTOM:
/* v_position is distance between bottom of frame and bottom of subtitle */
- y = (1.0 - subtitle.v_position()) * target.height - layout_height / PANGO_SCALE;
+ y = (1.0 - subtitles.front().v_position()) * target.height - layout_height / PANGO_SCALE;
break;
}
@@ -234,9 +280,20 @@ render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > f
list<PositionImage>
render_subtitles (list<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
{
+ list<dcp::SubtitleString> pending;
list<PositionImage> images;
+
BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
- images.push_back (render_subtitle (i, fonts, target));
+ if (!pending.empty() && fabs (i.v_position() - pending.back().v_position()) > 1e-4) {
+ images.push_back (render_line (pending, fonts, target));
+ pending.clear ();
+ }
+ pending.push_back (i);
}
+
+ if (!pending.empty ()) {
+ images.push_back (render_line (pending, fonts, target));
+ }
+
return images;
}
generated by cgit v1.2.3 (git 2.46.0) at 2026-04-20 01:01:26 +0000