/*
- Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ 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.
- This program is distributed in the hope that it will be useful,
+ 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cross.h"
#include "font.h"
#include "dcpomatic_assert.h"
+#include <dcp/raw_convert.h>
+#include <fontconfig/fontconfig.h>
#include <cairomm/cairomm.h>
#include <pangomm.h>
+#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT
+#include <pango/pangocairo.h>
+#endif
#include <boost/foreach.hpp>
+#include <boost/algorithm/string.hpp>
#include <iostream>
using std::list;
using std::make_pair;
using boost::shared_ptr;
using boost::optional;
+using boost::algorithm::replace_all;
static FcConfig* fc_config = 0;
static list<pair<FontFiles, string> > fc_config_fonts;
-/** @param subtitles A list of subtitles that are all on the same line */
+string
+marked_up (list<SubtitleString> subtitles, int target_height, float fade_factor)
+{
+ string out;
+
+ BOOST_FOREACH (SubtitleString const & i, subtitles) {
+ out += "<span ";
+ if (i.italic()) {
+ out += "style=\"italic\" ";
+ }
+ if (i.bold()) {
+ out += "weight=\"bold\" ";
+ }
+ if (i.underline()) {
+ out += "underline=\"single\" ";
+ }
+ out += "size=\"" + dcp::raw_convert<string>(i.size_in_pixels(target_height) * 72 * 1024 / 96) + "\" ";
+ /* Between 1-65535 inclusive, apparently... */
+ out += "alpha=\"" + dcp::raw_convert<string>(int(floor(fade_factor * 65534)) + 1) + "\" ";
+ out += "color=\"#" + i.colour().to_rgb_string() + "\">";
+
+ string t = i.text();
+ replace_all(t, "&", "&");
+ out += t;
+
+ out += "</span>";
+ }
+
+ return out;
+}
+
+static void
+set_source_rgba (Cairo::RefPtr<Cairo::Context> context, dcp::Colour colour, float fade_factor)
+{
+ context->set_source_rgba (float(colour.r) / 255, float(colour.g) / 255, float(colour.b) / 255, fade_factor);
+}
+
+/** @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<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
+render_line (list<SubtitleString> 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.
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 = subtitles.front().size() * target.height / (11 * 72);
+ int height = largest * target.height / (11 * 72);
/* ...scaled... */
height *= yscale;
/* ...and add a bit more for luck */
height += target.height / 11;
- shared_ptr<Image> image (new Image (AV_PIX_FMT_RGBA, dcp::Size (target.width, height), false));
+ /* FFmpeg BGRA means first byte blue, second byte green, third byte red, fourth byte alpha */
+ shared_ptr<Image> image (new Image (AV_PIX_FMT_BGRA, dcp::Size (target.width, height), false));
image->make_black ();
+#ifdef DCPOMATIC_HAVE_FORMAT_STRIDE_FOR_WIDTH
Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create (
image->data()[0],
Cairo::FORMAT_ARGB32,
image->size().width,
image->size().height,
+ /* Cairo ARGB32 means first byte blue, second byte green, third byte red, fourth byte alpha */
Cairo::ImageSurface::format_stride_for_width (Cairo::FORMAT_ARGB32, image->size().width)
);
+#else
+ /* Centos 5 does not have Cairo::ImageSurface::format_stride_for_width, so just use width * 4
+ which I hope is safe (if slow)
+ */
+ Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create (
+ image->data()[0],
+ Cairo::FORMAT_ARGB32,
+ image->size().width,
+ image->size().height,
+ image->size().width * 4
+ );
+#endif
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface);
}
}
- FcPattern* pattern = FcPatternBuild (0, FC_FILE, FcTypeString, font_files.get(FontFiles::NORMAL).get().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) {
layout->set_alignment (Pango::ALIGN_LEFT);
context->set_line_width (1);
+ context->set_antialias (Cairo::ANTIALIAS_GRAY);
+ Cairo::FontOptions fo;
+ context->get_font_options (fo);
+ fo.set_antialias (Cairo::ANTIALIAS_GRAY);
+ context->set_font_options (fo);
- /* Render the subtitle at the top left-hand corner of image */
-
- Pango::FontDescription font (font_name);
- font.set_absolute_size (subtitles.front().size_in_pixels (target.height) * PANGO_SCALE);
- layout->set_font_description (font);
+ /* Compute fade factor */
+ float fade_factor = 1;
- 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 ();
- }
+ /* Round the fade start/end to the nearest frame start. Otherwise if a subtitle starts just after
+ the start of a frame it will be faded out.
+ */
+ DCPTime const fade_in_start = DCPTime::from_seconds(subtitles.front().in().as_seconds()).round(frame_rate);
+ DCPTime const fade_in_end = fade_in_start + DCPTime::from_seconds (subtitles.front().fade_up_time().as_seconds ());
+ DCPTime const fade_out_end = DCPTime::from_seconds (subtitles.front().out().as_seconds()).round(frame_rate);
+ DCPTime const fade_out_start = fade_out_end - DCPTime::from_seconds (subtitles.front().fade_down_time().as_seconds ());
- marked_up += i.text ();
+ if (fade_in_start <= time && time <= fade_in_end && fade_in_start != fade_in_end) {
+ fade_factor *= DCPTime(time - fade_in_start).seconds() / DCPTime(fade_in_end - fade_in_start).seconds();
}
-
- if (italic) {
- marked_up += "</i>";
+ if (fade_out_start <= time && time <= fade_out_end && fade_out_start != fade_out_end) {
+ fade_factor *= 1 - DCPTime(time - fade_out_start).seconds() / DCPTime(fade_out_end - fade_out_start).seconds();
+ }
+ if (time < fade_in_start || time > fade_out_end) {
+ fade_factor = 0;
}
- layout->set_markup (marked_up);
+ /* Render the subtitle at the top left-hand corner of image */
- /* Compute fade factor */
- /* XXX */
- float fade_factor = 1;
+ Pango::FontDescription font (font_name);
+ layout->set_font_description (font);
+ layout->set_markup (marked_up (subtitles, target.height, fade_factor));
context->scale (xscale, yscale);
layout->update_from_cairo_context (context);
+ /* Shuffle the subtitle over very slightly if it has a border so that the left-hand
+ side of the first character's border is not cut off.
+ */
+ int const x_offset = subtitles.front().effect() == dcp::BORDER ? (target.width / 600.0) : 0;
+ /* Move down a bit so that accents on capital letters can be seen */
+ int const y_offset = target.height / 100.0;
+
if (subtitles.front().effect() == dcp::SHADOW) {
/* Drop-shadow effect */
- 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);
+ set_source_rgba (context, subtitles.front().effect_colour(), fade_factor);
+ context->move_to (x_offset + 4, y_offset + 4);
layout->add_to_cairo_context (context);
context->fill ();
}
- /* The actual subtitle */
-
- 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 (subtitles.front().effect() == dcp::BORDER) {
- /* Border effect */
- 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);
+ /* Border effect; stroke the subtitle with a large (arbitrarily chosen) line width */
+ set_source_rgba (context, subtitles.front().effect_colour(), fade_factor);
+ context->set_line_width (subtitles.front().outline_width * target.width / 2048.0);
+ context->set_line_join (Cairo::LINE_JOIN_ROUND);
+ context->move_to (x_offset, y_offset);
layout->add_to_cairo_context (context);
context->stroke ();
}
+ /* The actual subtitle */
+
+ context->set_line_width (0);
+ context->move_to (x_offset, y_offset);
+#ifdef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT
+ layout->show_in_cairo_context (context);
+#else
+ pango_cairo_show_layout (context->cobj(), layout->gobj());
+#endif
+
int layout_width;
int layout_height;
layout->get_pixel_size (layout_width, layout_height);
return PositionImage (image, Position<int> (max (0, x), max (0, y)));
}
+/** @param time Time of the frame that these subtitles are going on.
+ * @param frame_rate DCP frame rate.
+ */
list<PositionImage>
-render_subtitles (list<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
+render_subtitles (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate)
{
- list<dcp::SubtitleString> pending;
+ list<SubtitleString> pending;
list<PositionImage> images;
- BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
+ BOOST_FOREACH (SubtitleString const & i, subtitles) {
if (!pending.empty() && fabs (i.v_position() - pending.back().v_position()) > 1e-4) {
- images.push_back (render_line (pending, fonts, target));
+ images.push_back (render_line (pending, fonts, target, time, frame_rate));
pending.clear ();
}
pending.push_back (i);
}
if (!pending.empty ()) {
- images.push_back (render_line (pending, fonts, target));
+ images.push_back (render_line (pending, fonts, target, time, frame_rate));
}
return images;
projects / dcpomatic.git / blobdiff