static AliasStrength strengthOfFirstAlias(const FcPattern& original)
{
// Ideally there would exist a call like
// FcResult FcPatternIsWeak(pattern, object, id, FcBool* isWeak);
//
// However, there is no such call and as of Fc 2.11.0 even FcPatternEquals ignores the weak bit.
// Currently, the only reliable way of finding the weak bit is by its effect on matching.
// The weak bit only affects the matching of FC_FAMILY and FC_POSTSCRIPT_NAME object values.
// A element with the weak bit is scored after FC_LANG, without the weak bit is scored before.
// Note that the weak bit is stored on the element, not on the value it holds.
FcValue value;
FcResult result = FcPatternGet(&original, FC_FAMILY, 0, &value);
if (result != FcResultMatch)
return AliasStrength::Done;
RefPtr<FcPattern> pattern = adoptRef(FcPatternDuplicate(&original));
FcBool hasMultipleFamilies = true;
while (hasMultipleFamilies)
hasMultipleFamilies = FcPatternRemove(pattern.get(), FC_FAMILY, 1);
// Create a font set with two patterns.
// 1. the same FC_FAMILY as pattern and a lang object with only 'nomatchlang'.
// 2. a different FC_FAMILY from pattern and a lang object with only 'matchlang'.
FcUniquePtr<FcFontSet> fontSet(FcFontSetCreate());
FcUniquePtr<FcLangSet> strongLangSet(FcLangSetCreate());
FcLangSetAdd(strongLangSet.get(), reinterpret_cast<const FcChar8*>("nomatchlang"));
// Ownership of this FcPattern will be transferred with FcFontSetAdd.
FcPattern* strong = FcPatternDuplicate(pattern.get());
FcPatternAddLangSet(strong, FC_LANG, strongLangSet.get());
FcUniquePtr<FcLangSet> weakLangSet(FcLangSetCreate());
FcLangSetAdd(weakLangSet.get(), reinterpret_cast<const FcChar8*>("matchlang"));
// Ownership of this FcPattern will be transferred via FcFontSetAdd.
FcPattern* weak = FcPatternCreate();
FcPatternAddString(weak, FC_FAMILY, reinterpret_cast<const FcChar8*>("nomatchstring"));
FcPatternAddLangSet(weak, FC_LANG, weakLangSet.get());
FcFontSetAdd(fontSet.get(), strong);
FcFontSetAdd(fontSet.get(), weak);
// Add 'matchlang' to the copy of the pattern.
FcPatternAddLangSet(pattern.get(), FC_LANG, weakLangSet.get());
// Run a match against the copy of the pattern.
// If the first element was weak, then we should match the pattern with 'matchlang'.
// If the first element was strong, then we should match the pattern with 'nomatchlang'.
// Note that this config is only used for FcFontRenderPrepare, which we don't even want.
// However, there appears to be no way to match/sort without it.
RefPtr<FcConfig> config = adoptRef(FcConfigCreate());
FcFontSet* fontSets[1] = { fontSet.get() };
RefPtr<FcPattern> match = adoptRef(FcFontSetMatch(config.get(), fontSets, 1, pattern.get(), &result));
FcLangSet* matchLangSet;
FcPatternGetLangSet(match.get(), FC_LANG, 0, &matchLangSet);
return FcLangEqual == FcLangSetHasLang(matchLangSet, reinterpret_cast<const FcChar8*>("matchlang"))
? AliasStrength::Weak : AliasStrength::Strong;
}
XftPattern *
XftFontSetMatch (XftFontSet **sets,
int nsets,
XftPattern *p,
XftResult *result)
{
return FcFontSetMatch (0, sets, nsets, p, result);
}
FontFileLister::CollectionResult FontConfigFontFileLister::GetFontPaths(std::string const& facename, int bold, bool italic, std::set<wxUniChar> const& characters) {
CollectionResult ret;
std::string family(facename);
if (family[0] == '@')
family.erase(0, 1);
boost::to_lower(family);
int weight = bold == 0 ? 80 :
bold == 1 ? 200 :
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, 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<FcPattern*> match(FcFontSetMatch(config, sets, 1, pat, &result), FcPatternDestroy);
if (!match)
return ret;
FcChar8 *file;
if(FcPatternGetString(match, FC_FILE, 0, &file) != FcResultMatch)
return ret;
FcCharSet *charset;
if (FcPatternGetCharSet(match, FC_CHARSET, 0, &charset) == FcResultMatch) {
for (wxUniChar chr : characters) {
if (!FcCharSetHasChar(charset, chr))
ret.missing += chr;
}
}
ret.paths.emplace_back((const char *)file);
return ret;
}
static RefPtr<FcPattern> findBestFontGivenFallbacks(const FontPlatformData& fontData, FcPattern* pattern)
{
if (!fontData.m_pattern)
return nullptr;
if (!fontData.m_fallbacks) {
FcResult fontConfigResult;
fontData.m_fallbacks = FcFontSort(nullptr, fontData.m_pattern.get(), FcTrue, nullptr, &fontConfigResult);
}
if (!fontData.m_fallbacks)
return nullptr;
FcFontSet* sets[] = { fontData.m_fallbacks };
FcResult fontConfigResult;
return FcFontSetMatch(nullptr, sets, 1, pattern, &fontConfigResult);
}
FcPattern* findBestFontGivenFallbacks(const FontPlatformData& fontData, FcPattern* pattern)
{
if (!fontData.m_pattern)
return 0;
if (!fontData.m_fallbacks) {
FcResult fontConfigResult;
fontData.m_fallbacks = FcFontSort(0, fontData.m_pattern.get(), FcTrue, 0, &fontConfigResult);
}
if (!fontData.m_fallbacks)
return 0;
FcFontSet* sets[] = { fontData.m_fallbacks };
FcResult fontConfigResult;
return FcFontSetMatch(0, sets, 1, pattern, &fontConfigResult);
}
FcFontSet *fcinfo_families_index(const FcPattern *filter)
{
int unused_int, f, nfamilies;
FcPattern *pattern, *match;
FcFontSet *fontset, *tmp,
*families;
FcResult r;
FcChar8 *family, *next_family, *normal_style, *style;
FcInit();
pattern = FcPatternDuplicate(filter);
fontset = fcinfo(NULL, filter, FcFalse, 5,
FC_FAMILY,
FC_STYLE,
FC_LANG,/* fonts like Misc Fixed need
to be sorted by LANG (subset-like) */
FC_PIXEL_SIZE,
FC_FILE); /* for identifying the best font in
FC_LANG terms */
if (fontset->nfont == 0)
return fontset;
tmp = fcinfo_match(fontset, pattern);
FcFontSetDestroy(fontset);
fontset = tmp;
if (FcPatternGetInteger(pattern, FC_WEIGHT, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR);
if (FcPatternGetInteger(pattern, FC_SLANT, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
if (FcPatternGetInteger(pattern, FC_WIDTH, 0, &unused_int) != FcResultMatch)
FcPatternAddInteger(pattern, FC_WIDTH, FC_WIDTH_NORMAL);
/* choose 'normal' styles according to pattern */
families = FcFontSetCreate();
nfamilies = 0;
for (f = 0; f < fontset->nfont; )
{
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_FAMILY,
LANG_EN, &family)
== FcResultMatch);
FcPatternDel(pattern, FC_FAMILY);
FcPatternAddString(pattern, FC_FAMILY, family);
match = FcFontSetMatch(NULL, &fontset, 1, pattern, &r);
assert(fcinfo_get_translated_string(match, FC_STYLE, LANG_EN, &normal_style)
== FcResultMatch);
do
{
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_STYLE,
LANG_EN, &style)
== FcResultMatch);
if (FcStrCmpIgnoreCase(style, normal_style) == 0)
FcFontSetAdd(families, FcPatternDuplicate(fontset->fonts[f]));
if (++f == fontset->nfont)
break;
assert(fcinfo_get_translated_string(fontset->fonts[f], FC_FAMILY,
LANG_EN, &next_family)
== FcResultMatch);
}
while (FcStrCmpIgnoreCase(family, next_family) == 0);
nfamilies++;
}
FcPatternDestroy(pattern);
FcFontSetDestroy(fontset);
return families;
}
WRATHFontFetch::font_handle
font_config_magic_class::
fetch_font_entry(const WRATHFontConfig::InFontSpecification &in_spec)
{
WRATHAutoLockMutex(m_fc_mutex);
/*
Create an FcPattern from in_spec:
*/
FcPattern *fc_filter;
FcLangSet *fc_langs(NULL);
fc_filter=FcPatternCreate();
/*
Awkward moments in documentation:
the desription of FcFontSetMatch at
http://www.freedesktop.org/software/fontconfig/fontconfig-devel/fcfontsetmatch.html
states that:
" This function should be called only after FcConfigSubstitute and FcDefaultSubstitute
have been called for pattern; otherwise the results will not be correct"
where the documentation for FcConfigSubstitute is a what the heck moment.
Worse, calling FcDefaultSubstitute initially gives incorrect results
in tests, for now we do NOT call FcDefaultSubstitute and we do NOT call
FcConfigSubstitute.
*/
//FcDefaultSubstitute(fc_filter);
//FcConfigSubstitute(NULL, fc_filter, FcMatchPattern);
FcPatternHelper(fc_filter, in_spec.m_family_name, FC_FAMILY);
FcPatternHelper(fc_filter, in_spec.m_foundary_name, FC_FOUNDRY);
FcPatternHelper(fc_filter, in_spec.m_style, FC_STYLE);
FcPatternHelper(fc_filter, in_spec.m_weight, FC_WEIGHT);
FcPatternHelper(fc_filter, in_spec.m_slant, FC_SLANT);
if(!in_spec.m_languages.empty())
{
fc_langs=FcLangSetCreate();
for(std::set<std::string>::iterator iter=in_spec.m_languages.begin(),
end=in_spec.m_languages.end(); iter!=end; ++iter)
{
FcLangSetAdd(fc_langs,
reinterpret_cast<const FcChar8*>(iter->c_str()));
}
FcPatternAddLangSet(fc_filter, FC_LANG, fc_langs);
}
FcPattern *fc_font_choice(NULL);
FcResult fc_result;
WRATHFontFetch::font_handle R;
fc_font_choice=FcFontSetMatch(NULL, &m_fc_font_list, 1, fc_filter, &fc_result);
if(fc_font_choice!=NULL)
{
FcMagicValue<FcChar8*> file_name;
FcMagicValue<int> font_index;
FcGetMagicValue(fc_font_choice, FC_FILE, file_name);
FcGetMagicValue(fc_font_choice, FC_INDEX, font_index);
if(file_name.m_exists)
{
const char *fname(reinterpret_cast<const char*>(file_name.m_value));
if(!font_index.m_exists)
{
font_index.m_value=0;
}
R=WRATHFontDatabase::fetch_font_entry(fname, font_index.m_value);
}
FcPatternDestroy(fc_font_choice);
}
if(!in_spec.m_languages.empty())
{
FcLangSetDestroy(fc_langs);
}
FcPatternDestroy(fc_filter);
return R;
}
