X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Frender_subtitles.cc;h=e22c8c44fb19acac05131422d4302ccafb0d2488;hp=5364b8dfe3eeb9a3e0f0c1655c2b1ff4a425ca3a;hb=aeb835a18c8df347e0ed68fb24631b320abeb611;hpb=cb1dfa9ec09af2abf6d10e4bf2764476db83841b diff --git a/src/lib/render_subtitles.cc b/src/lib/render_subtitles.cc index 5364b8dfe..e22c8c44f 100644 --- a/src/lib/render_subtitles.cc +++ b/src/lib/render_subtitles.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2014 Carl Hetherington + Copyright (C) 2014-2015 Carl Hetherington This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,11 +17,15 @@ */ -#include -#include #include "render_subtitles.h" #include "types.h" #include "image.h" +#include "cross.h" +#include "font.h" +#include +#include +#include +#include using std::list; using std::cout; @@ -29,46 +33,44 @@ using std::string; using std::min; using std::max; using std::pair; +using std::cerr; +using std::make_pair; using boost::shared_ptr; 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 / 100) * target_height - offset; - case dcp::CENTER: - return (0.5 + v_position / 100) * target_height - offset; - case dcp::BOTTOM: - return (1.0 - v_position / 100) * target_height - offset; - } +static FcConfig* fc_config = 0; +static list > fc_config_fonts; - return 0; -} - -PositionImage -render_subtitles (list subtitles, dcp::Size target) +static PositionImage +render_subtitle (dcp::SubtitleString const & subtitle, list > fonts, dcp::Size target) { - if (subtitles.empty ()) { - return PositionImage (); + /* 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 ()); + yscale = 1; + } else { + xscale = 1; + yscale = 1 / min (4.0f, subtitle.aspect_adjust ()); + } } - /* Estimate height that the subtitle image needs to be */ - optional top; - optional bottom; - for (list::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); - - top = min (top.get_value_or (t), t); - bottom = max (bottom.get_value_or (b), b); - } + /* Make an empty bitmap as wide as target and at + least tall enough for this subtitle. + */ - top = top.get() - 32; - bottom = bottom.get() + 32; + /* Basic guess on height... */ + int height = subtitle.size() * target.height / (11 * 72); + /* ...scaled... */ + height *= yscale; + /* ...and add a bit more for luck */ + height += target.height / 11; - shared_ptr image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, bottom.get() - top.get ()), false)); + shared_ptr image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, height), false)); image->make_black (); Cairo::RefPtr surface = Cairo::ImageSurface::create ( @@ -78,75 +80,163 @@ render_subtitles (list subtitles, dcp::Size target) image->size().height, Cairo::ImageSurface::format_stride_for_width (Cairo::FORMAT_ARGB32, image->size().width) ); - + Cairo::RefPtr context = Cairo::Context::create (surface); - Glib::RefPtr 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); + boost::filesystem::path font_file; + try { + font_file = shared_path () / "LiberationSans-Regular.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"; + } - for (list::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) { - string f = i->font (); - if (f.empty ()) { - f = "Arial"; + BOOST_FOREACH (shared_ptr i, fonts) { + if (i->id() == subtitle.font() && i->file ()) { + font_file = i->file().get (); } - 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); - } - 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 ()); - } -#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 (); + } + + list >::const_iterator existing = fc_config_fonts.begin (); + while (existing != fc_config_fonts.end() && existing->first != font_file) { + ++existing; + } + + string font_name; + if (existing != fc_config_fonts.end ()) { + 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)); + FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast (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 (family); + } + } + + FcFontSetDestroy (font_set); } - /* 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); + FcObjectSetDestroy (object_set); + FcPatternDestroy (pattern); + + fc_config_fonts.push_back (make_pair (font_file, font_name)); + } + + FcConfigSetCurrent (fc_config); + + Glib::RefPtr 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 (subtitle.size_in_pixels (target.height) * PANGO_SCALE); + if (subtitle.italic ()) { + font.set_style (Pango::STYLE_ITALIC); + } + layout->set_font_description (font); + layout->set_text (subtitle.text ()); + + /* Compute fade factor */ + /* XXX */ + float fade_factor = 1; + + layout->update_from_cairo_context (context); + + context->scale (xscale, yscale); + + if (subtitle.effect() == dcp::SHADOW) { + /* Drop-shadow effect */ + dcp::Colour const ec = subtitle.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 = subtitle.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) { + /* Border effect */ + dcp::Colour ec = subtitle.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 (); + } + + int layout_width; + int layout_height; + layout->get_size (layout_width, layout_height); + + int x = 0; + switch (subtitle.h_align ()) { + case dcp::HALIGN_LEFT: + /* h_position is distance between left of frame and left of subtitle */ + x = subtitle.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); + 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; + break; + } + + int y = 0; + switch (subtitle.v_align ()) { + case dcp::VALIGN_TOP: + /* v_position is distance between top of frame and top of subtitle */ + y = subtitle.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); + 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; + break; } - return PositionImage (image, Position (0, top.get ())); + return PositionImage (image, Position (x, y)); } +list +render_subtitles (list subtitles, list > fonts, dcp::Size target) +{ + list images; + BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) { + images.push_back (render_subtitle (i, fonts, target)); + } + return images; +}