/*
- Copyright (C) 2014 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 <cairomm/cairomm.h>
-#include <pangomm.h>
#include "render_subtitles.h"
#include "types.h"
#include "image.h"
+#include "cross.h"
+#include "font.h"
+#include "dcpomatic_assert.h"
+#include <fontconfig/fontconfig.h>
+#include <cairomm/cairomm.h>
+#include <pangomm.h>
+#include <boost/foreach.hpp>
+#include <boost/make_shared.hpp>
+#include <iostream>
using std::list;
using std::cout;
using std::min;
using std::max;
using std::pair;
+using std::cerr;
+using std::make_pair;
using boost::shared_ptr;
+using boost::make_shared;
using boost::optional;
-static int
-calculate_position (dcp::VAlign v_align, double v_position, int target_height, int offset)
-{
- switch (v_align) {
- case dcp::TOP:
- return v_position * target_height - offset;
- case dcp::CENTER:
- return (0.5 + v_position) * target_height - offset;
- case dcp::BOTTOM:
- return (1.0 - v_position) * target_height - offset;
- }
+static FcConfig* fc_config = 0;
+static list<pair<FontFiles, string> > fc_config_fonts;
- return 0;
-}
-
-PositionImage
-render_subtitles (list<dcp::SubtitleString> subtitles, dcp::Size target)
+/** @param subtitles A list of subtitles that are all on the same line */
+static PositionImage
+render_line (list<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
{
- if (subtitles.empty ()) {
- return PositionImage ();
- }
+ /* XXX: this method can only handle italic / bold changes mid-line,
+ nothing else yet.
+ */
- /* Estimate height that the subtitle image needs to be */
- optional<int> top;
- optional<int> bottom;
- for (list<dcp::SubtitleString>::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) {
- int const b = calculate_position (i->v_align(), i->v_position(), target.height, 0);
- int const t = b - i->size() * target.height / (11 * 72);
+ DCPOMATIC_ASSERT (!subtitles.empty ());
- top = min (top.get_value_or (t), t);
- bottom = max (bottom.get_value_or (b), b);
+ /* 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 ());
+ }
}
- top = top.get() - 32;
- bottom = bottom.get() + 32;
+ /* Make an empty bitmap as wide as target and at
+ least tall enough for this subtitle.
+ */
+
+ /* Basic guess on height... */
+ int height = subtitles.front().size() * target.height / (11 * 72);
+ /* ...scaled... */
+ height *= yscale;
+ /* ...and add a bit more for luck */
+ height += target.height / 11;
- shared_ptr<Image> image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, bottom.get() - top.get ()), false));
+ shared_ptr<Image> image = make_shared<Image> (AV_PIX_FMT_RGBA, 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().height,
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);
- Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
- layout->set_width (image->size().width * PANGO_SCALE);
- layout->set_alignment (Pango::ALIGN_CENTER);
+ if (!fc_config) {
+ fc_config = FcConfigCreate ();
+ }
- context->set_line_width (1);
+ FontFiles font_files;
+
+ try {
+ 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 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");
+ }
- for (list<dcp::SubtitleString>::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) {
- string f = i->font ();
- if (f.empty ()) {
- f = "Arial";
+ BOOST_FOREACH (shared_ptr<Font> i, fonts) {
+ if (i->id() == subtitles.front().font() && i->file(FontFiles::NORMAL)) {
+ font_files = i->files ();
}
- Pango::FontDescription font (f);
- font.set_absolute_size (i->size_in_pixels (target.height) * PANGO_SCALE);
- if (i->italic ()) {
- font.set_style (Pango::STYLE_ITALIC);
+ }
+
+ list<pair<FontFiles, string> >::const_iterator existing = fc_config_fonts.begin ();
+ while (existing != fc_config_fonts.end() && existing->first != font_files) {
+ ++existing;
+ }
+
+ string font_name;
+ if (existing != fc_config_fonts.end ()) {
+ font_name = existing->second;
+ } else {
+ /* Make this font available to DCP-o-matic */
+ 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())
+ );
+ }
}
- layout->set_font_description (font);
- layout->set_text (i->text ());
-
- /* Compute fade factor */
- /* XXX */
- float fade_factor = 1;
-#if 0
- dcp::Time now (time * 1000 / (4 * TIME_HZ));
- dcp::Time end_fade_up = i->in() + i->fade_up_time ();
- dcp::Time start_fade_down = i->out() - i->fade_down_time ();
- if (now < end_fade_up) {
- fade_factor = (now - i->in()) / i->fade_up_time();
- } else if (now > start_fade_down) {
- fade_factor = 1.0 - ((now - start_fade_down) / i->fade_down_time ());
+
+ 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) {
+ for (int i = 0; i < font_set->nfont; ++i) {
+ FcPattern* font = font_set->fonts[i];
+ FcChar8* file;
+ FcChar8* family;
+ FcChar8* style;
+ if (
+ FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
+ FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
+ FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
+ ) {
+ font_name = reinterpret_cast<char const *> (family);
+ }
+ }
+
+ FcFontSetDestroy (font_set);
}
-#endif
-
- layout->update_from_cairo_context (context);
-
- /* Work out position */
-
- int const x = 0;
- int const y = calculate_position (i->v_align (), i->v_position (), target.height, (layout->get_baseline() / PANGO_SCALE) + top.get ());
-
- if (i->effect() == dcp::SHADOW) {
- /* Drop-shadow effect */
- dcp::Color const ec = i->effect_color ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
- context->move_to (x + 4, y + 4);
- layout->add_to_cairo_context (context);
- context->fill ();
+
+ FcObjectSetDestroy (object_set);
+ FcPatternDestroy (pattern);
+
+ fc_config_fonts.push_back (make_pair (font_files, font_name));
+ }
+
+ FcConfigSetCurrent (fc_config);
+
+ Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
+
+ layout->set_alignment (Pango::ALIGN_LEFT);
+
+ context->set_line_width (1);
+
+ /* 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);
+
+ string marked_up;
+ bool italic = false;
+ bool bold = 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 ();
}
- /* The actual subtitle */
- context->move_to (x, y);
- dcp::Color const c = i->color ();
- context->set_source_rgba (float(c.r) / 255, float(c.g) / 255, float(c.b) / 255, fade_factor);
+ if (i.bold() != bold) {
+ if (i.bold()) {
+ marked_up += "<b>";
+ } else {
+ marked_up += "</b>";
+ }
+ bold = i.bold ();
+ }
+
+ marked_up += i.text ();
+ }
+
+ if (italic) {
+ marked_up += "</i>";
+ }
+
+ if (bold) {
+ marked_up += "</b>";
+ }
+
+ layout->set_markup (marked_up);
+
+ /* Compute fade factor */
+ /* XXX */
+ float fade_factor = 1;
+
+ context->scale (xscale, yscale);
+ layout->update_from_cairo_context (context);
+
+ 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);
layout->add_to_cairo_context (context);
context->fill ();
+ }
- if (i->effect() == dcp::BORDER) {
- /* Border effect */
- context->move_to (x, y);
- dcp::Color ec = i->effect_color ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
- layout->add_to_cairo_context (context);
- context->stroke ();
- }
+ /* 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);
+ layout->add_to_cairo_context (context);
+ context->stroke ();
}
- return PositionImage (image, Position<int> (0, top.get ()));
+ int layout_width;
+ int layout_height;
+ layout->get_pixel_size (layout_width, layout_height);
+ layout_width *= xscale;
+ layout_height *= yscale;
+
+ int x = 0;
+ switch (subtitles.front().h_align ()) {
+ case dcp::HALIGN_LEFT:
+ /* h_position is distance between left of frame and left of subtitle */
+ 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 + subtitles.front().h_position()) * target.width - layout_width / 2;
+ break;
+ case dcp::HALIGN_RIGHT:
+ /* h_position is distance between right of frame and right of subtitle */
+ x = (1.0 - subtitles.front().h_position()) * target.width - layout_width;
+ break;
+ }
+
+ int y = 0;
+ switch (subtitles.front().v_align ()) {
+ case dcp::VALIGN_TOP:
+ /* SMPTE says that v_position is the distance between top
+ of frame and top of subtitle, but this doesn't always seem to be
+ the case in practice; Gunnar Ásgeirsson's Dolby server appears
+ to put VALIGN_TOP subs with v_position as the distance between top
+ of frame and bottom of subtitle.
+ */
+ y = subtitles.front().v_position() * target.height - layout_height;
+ break;
+ case dcp::VALIGN_CENTER:
+ /* v_position is distance between centre of frame and centre of subtitle */
+ y = (0.5 + subtitles.front().v_position()) * target.height - layout_height / 2;
+ break;
+ case dcp::VALIGN_BOTTOM:
+ /* v_position is distance between bottom of frame and bottom of subtitle */
+ y = (1.0 - subtitles.front().v_position()) * target.height - layout_height;
+ break;
+ }
+
+ return PositionImage (image, Position<int> (max (0, x), max (0, y)));
}
+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) {
+ 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;
+}
projects / dcpomatic.git / blobdiff