X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Frender_text.cc;h=96b832c577cb036f119dbfba4ffc675ede63f7f4;hb=3799e91d126d243d41c44dcb0ca1bfa66b53a57e;hp=b0a958c16d194cd15b0a65d5ec72030a29a8f519;hpb=2da4caba7871455c097c0ed940dd6f2332dbda5d;p=dcpomatic.git diff --git a/src/lib/render_text.cc b/src/lib/render_text.cc index b0a958c16..96b832c57 100644 --- a/src/lib/render_text.cc +++ b/src/lib/render_text.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2014-2016 Carl Hetherington + Copyright (C) 2014-2021 Carl Hetherington This file is part of DCP-o-matic. @@ -18,12 +18,14 @@ */ -#include "render_text.h" -#include "types.h" -#include "image.h" + #include "cross.h" -#include "font.h" #include "dcpomatic_assert.h" +#include "font.h" +#include "image.h" +#include "render_text.h" +#include "types.h" +#include "util.h" #include "warnings.h" #include #include @@ -32,35 +34,35 @@ DCPOMATIC_DISABLE_WARNINGS #include DCPOMATIC_ENABLE_WARNINGS #include -#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT -#include -#endif -#include #include #include -using std::list; + +using std::cerr; using std::cout; -using std::string; -using std::min; +using std::list; +using std::make_pair; +using std::make_shared; using std::max; +using std::min; using std::pair; -using std::cerr; -using std::make_pair; -using boost::shared_ptr; +using std::shared_ptr; +using std::string; using boost::optional; using boost::algorithm::replace_all; using namespace dcpomatic; -static FcConfig* fc_config = 0; -static list > fc_config_fonts; + +static FcConfig* fc_config = nullptr; +static list> fc_config_fonts; + string marked_up (list subtitles, int target_height, float fade_factor) { string out; - BOOST_FOREACH (StringText const & i, subtitles) { + for (auto const& i: subtitles) { out += " subtitles, int target_height, float fade_factor) /* Between 1-65535 inclusive, apparently... */ out += "alpha=\"" + dcp::raw_convert(int(floor(fade_factor * 65534)) + 1) + "\" "; out += "color=\"#" + i.colour().to_rgb_string() + "\">"; - - string t = i.text(); - replace_all(t, "&", "&"); - out += t; - + out += i.text(); out += ""; } return out; } + static void set_source_rgba (Cairo::RefPtr context, dcp::Colour colour, float fade_factor) { @@ -97,7 +96,7 @@ static shared_ptr create_image (dcp::Size size) { /* FFmpeg BGRA means first byte blue, second byte green, third byte red, fourth byte alpha */ - shared_ptr image (new Image(AV_PIX_FMT_BGRA, size, false)); + auto image = make_shared(AV_PIX_FMT_BGRA, size, Image::Alignment::COMPACT); image->make_black (); return image; } @@ -106,8 +105,7 @@ create_image (dcp::Size size) static Cairo::RefPtr create_surface (shared_ptr image) { -#ifdef DCPOMATIC_HAVE_FORMAT_STRIDE_FOR_WIDTH - Cairo::RefPtr surface = Cairo::ImageSurface::create ( + return Cairo::ImageSurface::create ( image->data()[0], Cairo::FORMAT_ARGB32, image->size().width, @@ -115,52 +113,26 @@ create_surface (shared_ptr image) /* 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 surface = Cairo::ImageSurface::create ( - image->data()[0], - Cairo::FORMAT_ARGB32, - image->size().width, - image->size().height, - image->size().width * 4 - ); -#endif - - return surface; } static string -setup_font (StringText const& subtitle, list > const& fonts) +setup_font (StringText const& subtitle, list> const& fonts) { if (!fc_config) { fc_config = FcInitLoadConfig (); } - optional font_file; - - try { - font_file = shared_path () / "LiberationSans-Regular.ttf"; - } catch (boost::filesystem::filesystem_error& e) { + auto font_file = default_font_file (); - } - - /* Hack: try the debian/ubuntu locations if getting the shared path failed */ - - if (!font_file || !boost::filesystem::exists(*font_file)) { - font_file = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf"; - } - - BOOST_FOREACH (shared_ptr i, fonts) { + for (auto i: fonts) { if (i->id() == subtitle.font() && i->file()) { - font_file = i->file (); + font_file = i->file().get(); } } - list >::const_iterator existing = fc_config_fonts.begin (); - while (existing != fc_config_fonts.end() && existing->first != *font_file) { + auto existing = fc_config_fonts.cbegin (); + while (existing != fc_config_fonts.end() && existing->first != font_file) { ++existing; } @@ -169,12 +141,12 @@ setup_font (StringText const& subtitle, list > const& fonts) font_name = existing->second; } else { /* Make this font available to DCP-o-matic */ - FcConfigAppFontAddFile (fc_config, reinterpret_cast(font_file->string().c_str())); - FcPattern* pattern = FcPatternBuild ( - 0, FC_FILE, FcTypeString, font_file->string().c_str(), static_cast (0) + FcConfigAppFontAddFile (fc_config, reinterpret_cast(font_file.string().c_str())); + auto pattern = FcPatternBuild ( + 0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast(0) ); - FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast (0)); - FcFontSet* font_set = FcFontList (fc_config, pattern, object_set); + auto object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast (0)); + auto 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]; @@ -196,7 +168,7 @@ setup_font (StringText const& subtitle, list > const& fonts) FcObjectSetDestroy (object_set); FcPatternDestroy (pattern); - fc_config_fonts.push_back (make_pair(*font_file, font_name)); + fc_config_fonts.push_back (make_pair(font_file, font_name)); } FcConfigSetCurrent (fc_config); @@ -212,10 +184,10 @@ calculate_fade_factor (StringText const& first, DCPTime time, int frame_rate) /* 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(first.in().as_seconds()).round(frame_rate); - DCPTime const fade_in_end = fade_in_start + DCPTime::from_seconds (first.fade_up_time().as_seconds ()); - DCPTime const fade_out_end = DCPTime::from_seconds (first.out().as_seconds()).round(frame_rate); - DCPTime const fade_out_start = fade_out_end - DCPTime::from_seconds (first.fade_down_time().as_seconds ()); + auto const fade_in_start = DCPTime::from_seconds(first.in().as_seconds()).round(frame_rate); + auto const fade_in_end = fade_in_start + DCPTime::from_seconds (first.fade_up_time().as_seconds ()); + auto const fade_out_end = DCPTime::from_seconds (first.out().as_seconds()).round(frame_rate); + auto const fade_out_start = fade_out_end - DCPTime::from_seconds (first.fade_down_time().as_seconds ()); 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(); @@ -235,16 +207,16 @@ static int x_position (StringText const& first, int target_width, int layout_width) { int x = 0; - switch (first.h_align ()) { - case dcp::HALIGN_LEFT: + switch (first.h_align()) { + case dcp::HAlign::LEFT: /* h_position is distance between left of frame and left of subtitle */ x = first.h_position() * target_width; break; - case dcp::HALIGN_CENTER: + case dcp::HAlign::CENTER: /* h_position is distance between centre of frame and centre of subtitle */ x = (0.5 + first.h_position()) * target_width - layout_width / 2; break; - case dcp::HALIGN_RIGHT: + case dcp::HAlign::RIGHT: /* h_position is distance between right of frame and right of subtitle */ x = (1.0 - first.h_position()) * target_width - layout_width; break; @@ -254,26 +226,25 @@ x_position (StringText const& first, int target_width, int layout_width) } - static int y_position (StringText const& first, int target_height, int layout_height) { int y = 0; - switch (first.v_align ()) { - case dcp::VALIGN_TOP: + switch (first.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 + to put VAlign::TOP subs with v_position as the distance between top of frame and bottom of subtitle. */ y = first.v_position() * target_height - layout_height; break; - case dcp::VALIGN_CENTER: + case dcp::VAlign::CENTER: /* v_position is distance between centre of frame and centre of subtitle */ y = (0.5 + first.v_position()) * target_height - layout_height / 2; break; - case dcp::VALIGN_BOTTOM: + case dcp::VAlign::BOTTOM: /* v_position is distance between bottom of frame and bottom of subtitle */ y = (1.0 - first.v_position()) * target_height - layout_height; break; @@ -292,6 +263,7 @@ setup_layout (Glib::RefPtr layout, string font_name, string marku layout->set_markup (markup); } + /** Create a Pango layout using a dummy context which we can use to calculate the size * of the text we will render. Then we can transfer the layout over to the real context * for the actual render. @@ -299,10 +271,12 @@ setup_layout (Glib::RefPtr layout, string font_name, string marku static Glib::RefPtr create_layout() { - PangoFontMap* c_font_map = pango_cairo_font_map_new (); - Glib::RefPtr font_map = Glib::wrap (c_font_map); - PangoContext* c_context = pango_font_map_create_context (c_font_map); - Glib::RefPtr context = Glib::wrap (c_context); + auto c_font_map = pango_cairo_font_map_new (); + DCPOMATIC_ASSERT (c_font_map); + auto font_map = Glib::wrap (c_font_map); + auto c_context = pango_font_map_create_context (c_font_map); + DCPOMATIC_ASSERT (c_context); + auto context = Glib::wrap (c_context); return Pango::Layout::create (context); } @@ -311,19 +285,19 @@ create_layout() * at the same time and with the same fade in/out. */ static PositionImage -render_line (list subtitles, list > fonts, dcp::Size target, DCPTime time, int frame_rate) +render_line (list subtitles, list> 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 ()); - StringText const& first = subtitles.front (); + auto const& first = subtitles.front (); - string const font_name = setup_font (first, fonts); - float const fade_factor = calculate_fade_factor (first, time, frame_rate); - string const markup = marked_up (subtitles, target.height, fade_factor); - Glib::RefPtr layout = create_layout (); + auto const font_name = setup_font (first, fonts); + auto const fade_factor = calculate_fade_factor (first, time, frame_rate); + auto const markup = marked_up (subtitles, target.height, fade_factor); + auto layout = create_layout (); setup_layout (layout, font_name, markup); dcp::Size size; layout->get_pixel_size (size.width, size.height); @@ -343,28 +317,30 @@ render_line (list subtitles, list > fonts, dcp::Siz } } + auto const border_width = first.effect() == dcp::Effect::BORDER ? (first.outline_width * target.width / 2048.0) : 0; + size.width += 2 * ceil (border_width); + size.height += 2 * ceil (border_width); + size.width *= x_scale; size.height *= y_scale; - /* 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 = first.effect() == dcp::BORDER ? (target.width / 600.0) : 0; + /* Shuffle the subtitle over by the border width (if we have any) so it's not cut off */ + int const x_offset = ceil (border_width); /* Move down a bit so that accents on capital letters can be seen */ int const y_offset = target.height / 100.0; size.width += x_offset; size.height += y_offset; - shared_ptr image = create_image (size); - Cairo::RefPtr surface = create_surface (image); - Cairo::RefPtr context = Cairo::Context::create (surface); + auto image = create_image (size); + auto surface = create_surface (image); + auto context = Cairo::Context::create (surface); context->set_line_width (1); context->scale (x_scale, y_scale); layout->update_from_cairo_context (context); - if (first.effect() == dcp::SHADOW) { + if (first.effect() == dcp::Effect::SHADOW) { /* Drop-shadow effect */ set_source_rgba (context, first.effect_colour(), fade_factor); context->move_to (x_offset + 4, y_offset + 4); @@ -372,10 +348,10 @@ render_line (list subtitles, list > fonts, dcp::Siz context->fill (); } - if (first.effect() == dcp::BORDER) { - /* Border effect; stroke the subtitle with a large (arbitrarily chosen) line width */ + if (first.effect() == dcp::Effect::BORDER) { + /* Border effect */ set_source_rgba (context, first.effect_colour(), fade_factor); - context->set_line_width (first.outline_width * target.width / 2048.0); + context->set_line_width (border_width); context->set_line_join (Cairo::LINE_JOIN_ROUND); context->move_to (x_offset, y_offset); layout->add_to_cairo_context (context); @@ -384,13 +360,16 @@ render_line (list subtitles, list > fonts, dcp::Siz /* The actual subtitle */ - context->set_line_width (0); + set_source_rgba (context, first.colour(), fade_factor); + + context->move_to (x_offset, y_offset); + layout->add_to_cairo_context (context); + context->fill (); + + context->set_line_width (0.5); 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 + layout->add_to_cairo_context (context); + context->stroke (); int const x = x_position (first, target.width, size.width); int const y = y_position (first, target.height, size.height); @@ -399,15 +378,16 @@ render_line (list subtitles, list > fonts, dcp::Siz /** @param time Time of the frame that these subtitles are going on. + * @param target Size of the container that this subtitle will end up in. * @param frame_rate DCP frame rate. */ list -render_text (list subtitles, list > fonts, dcp::Size target, DCPTime time, int frame_rate) +render_text (list subtitles, list> fonts, dcp::Size target, DCPTime time, int frame_rate) { list pending; list images; - BOOST_FOREACH (StringText const & i, subtitles) { + for (auto const& i: subtitles) { if (!pending.empty() && (i.v_align() != pending.back().v_align() || fabs(i.v_position() - pending.back().v_position()) > 1e-4)) { images.push_back (render_line (pending, fonts, target, time, frame_rate)); pending.clear (); @@ -415,7 +395,7 @@ render_text (list subtitles, list > fonts, dcp::Siz pending.push_back (i); } - if (!pending.empty ()) { + if (!pending.empty()) { images.push_back (render_line (pending, fonts, target, time, frame_rate)); }