Ask fontconfig to scan the system for fonts requested by text subtitle files (#2264).

[dcpomatic.git] / src / lib / font_config.cc

diff --git a/src/lib/font_config.cc b/src/lib/font_config.cc
index c7361bc04823e7547a74b5117c5dfdbd732bd252..5c9eebb3fb752f7d2cc4fbc104235d9f71d6bbc7 100644 (file)
--- a/src/lib/font_config.cc
+++ b/src/lib/font_config.cc
@@ -22,6 +22,7 @@
 #include "dcpomatic_assert.h"
 #include "font_config.h"
 #include <fontconfig/fontconfig.h>
+#include <boost/filesystem.hpp>
 #include <boost/optional.hpp>
 
 
@@ -85,6 +86,33 @@ FontConfig::make_font_available(boost::filesystem::path font_file)
 }
 
 
+optional<boost::filesystem::path>
+FontConfig::system_font_with_name(string name)
+{
+       optional<boost::filesystem::path> path;
+
+       auto pattern = FcNameParse(reinterpret_cast<FcChar8 const*>(name.c_str()));
+       auto object_set = FcObjectSetBuild(FC_FILE, nullptr);
+       auto font_set = FcFontList(_config, pattern, object_set);
+       if (font_set) {
+               for (int i = 0; i < font_set->nfont; ++i) {
+                       auto font = font_set->fonts[i];
+                       FcChar8* file;
+                       if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch) {
+                               path = boost::filesystem::path(reinterpret_cast<char*>(file));
+                               break;
+                       }
+               }
+               FcFontSetDestroy(font_set);
+       }
+
+       FcObjectSetDestroy(object_set);
+       FcPatternDestroy(pattern);
+
+       return path;
+}
+
+
 FontConfig *
 FontConfig::instance()
 {