Aegisub/src/font_file_lister_fontconfig...

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// Copyright (c) 2012, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "font_file_lister.h"
#include <libaegisub/charset_conv_win.h>
#include <libaegisub/log.h>
#include <boost/algorithm/string/case_conv.hpp>
#include <boost/filesystem/path.hpp>
#include <fontconfig/fontconfig.h>
#include <wx/intl.h>
namespace {
bool pattern_matches(FcPattern *pat, const char *field, std::string const& name) {
FcChar8 *str;
for (int i = 0; FcPatternGetString(pat, field, i, &str) == FcResultMatch; ++i) {
std::string sstr((char *)str);
boost::to_lower(sstr);
if (sstr == name)
return true;
}
return false;
}
void find_font(FcFontSet *src, FcFontSet *dst, std::string const& family) {
if (!src) return;
for (FcPattern *pat : boost::make_iterator_range(&src->fonts[0], &src->fonts[src->nfont])) {
int val;
if (FcPatternGetBool(pat, FC_OUTLINE, 0, &val) != FcResultMatch || val != FcTrue) continue;
if (pattern_matches(pat, FC_FULLNAME, family) || pattern_matches(pat, FC_FAMILY, family))
FcFontSetAdd(dst, FcPatternDuplicate(pat));
}
}
}
FontConfigFontFileLister::FontConfigFontFileLister(FontCollectorStatusCallback &cb)
: config(FcInitLoadConfig(), FcConfigDestroy)
{
cb(_("Updating font cache\n"), 0);
FcConfigBuildFonts(config);
}
CollectionResult FontConfigFontFileLister::GetFontPaths(std::string const& facename, int bold, bool italic, std::vector<int> const& characters) {
CollectionResult ret;
std::string family = facename[0] == '@' ? facename.substr(1) : facename;
boost::to_lower(family);
int weight = bold == 0 ? 400 :
bold == 1 ? 700 :
bold;
int slant = italic ? 110 : 0;
// Create a fontconfig pattern to match the desired weight/slant
agi::scoped_holder<FcPattern*> pat(FcPatternCreate(), FcPatternDestroy);
if (!pat) return ret;
FcPatternAddBool(pat, FC_OUTLINE, true);
FcPatternAddInteger(pat, FC_SLANT, slant);
FcPatternAddInteger(pat, FC_WEIGHT, FcWeightFromOpenType(weight));
FcDefaultSubstitute(pat);
if (!FcConfigSubstitute(config, pat, FcMatchPattern)) return ret;
// Create a font set with only correctly named fonts
// This is needed because the patterns returned by font matching only
// include the first family and fullname, so we can't always verify that
// we got the actual font we were asking for after the fact
agi::scoped_holder<FcFontSet*> fset(FcFontSetCreate(), FcFontSetDestroy);
find_font(FcConfigGetFonts(config, FcSetApplication), fset, family);
find_font(FcConfigGetFonts(config, FcSetSystem), fset, family);
// Get the best match from fontconfig
FcResult result;
FcFontSet *sets[] = { (FcFontSet*)fset };
agi::scoped_holder<FcFontSet*> matches(FcFontSetSort(config, sets, 1, pat, false, nullptr, &result), FcFontSetDestroy);
if (matches->nfont == 0)
return ret;
auto match = matches->fonts[0];
FcChar8 *file;
if(FcPatternGetString(match, FC_FILE, 0, &file) != FcResultMatch)
return ret;
FcCharSet *charset;
if (FcPatternGetCharSet(match, FC_CHARSET, 0, &charset) == FcResultMatch) {
for (int chr : characters) {
if (!FcCharSetHasChar(charset, chr))
ret.missing += chr;
}
}
int actual_weight = 0;
if (FcPatternGetInteger(match, FC_WEIGHT, 0, &actual_weight) == FcResultMatch)
ret.fake_bold = weight > FcWeightToOpenType(actual_weight) + 150;
int actual_slant = slant;
if (FcPatternGetInteger(match, FC_SLANT, 0, &actual_slant) == FcResultMatch)
ret.fake_italic = italic && !actual_slant;
ret.paths.emplace_back((const char *)file);
return ret;
}