X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Frender_subtitles.cc;h=e22c8c44fb19acac05131422d4302ccafb0d2488;hb=0d36ac996c7aed9e283cd05314ae2124384df5ea;hp=8f8958868ae2743f99eb0806bc7fd58d365688d9;hpb=7affca9f7b210c3137eb084cd393b534051a2647;p=dcpomatic.git diff --git a/src/lib/render_subtitles.cc b/src/lib/render_subtitles.cc index 8f8958868..e22c8c44f 100644 --- a/src/lib/render_subtitles.cc +++ b/src/lib/render_subtitles.cc @@ -20,9 +20,12 @@ #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; @@ -30,11 +33,16 @@ 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 FcConfig* fc_config = 0; +static list > fc_config_fonts; + static PositionImage -render_subtitle (dcp::SubtitleString const & subtitle, dcp::Size target) +render_subtitle (dcp::SubtitleString const & subtitle, list > fonts, dcp::Size target) { /* Calculate x and y scale factors. These are only used to stretch the font away from its normal aspect ratio. @@ -72,8 +80,68 @@ render_subtitle (dcp::SubtitleString const & subtitle, 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); + + if (!fc_config) { + fc_config = FcConfigCreate (); + } + + 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"; + } + + BOOST_FOREACH (shared_ptr i, fonts) { + if (i->id() == subtitle.font() && 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) { + ++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); + } + + 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); @@ -82,20 +150,20 @@ render_subtitle (dcp::SubtitleString const & subtitle, dcp::Size target) /* Render the subtitle at the top left-hand corner of image */ - Pango::FontDescription font (subtitle.font().get_value_or ("Arial")); + 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) { @@ -123,36 +191,52 @@ render_subtitle (dcp::SubtitleString const & subtitle, dcp::Size target) 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::TOP: + 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::CENTER: + 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 + subtitle.v_position()) * target.height - layout_height / (PANGO_SCALE * 2); break; - case dcp::BOTTOM: + 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 ((image->size().width - layout_width * xscale / PANGO_SCALE) / 2, y)); + return PositionImage (image, Position (x, y)); } list -render_subtitles (list subtitles, dcp::Size target) +render_subtitles (list subtitles, list > fonts, dcp::Size target) { list images; BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) { - images.push_back (render_subtitle (i, target)); + images.push_back (render_subtitle (i, fonts, target)); } return images; }