bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[],
SkTypeface::Style style,
FontIdentity* outIdentity,
SkString* outFamilyName,
SkTypeface::Style* outStyle) {
SkString familyStr(familyName ? familyName : "");
if (familyStr.size() > kMaxFontFamilyLength) {
return false;
}
SkAutoMutexAcquire ac(mutex_);
FcPattern* pattern = FcPatternCreate();
if (familyName) {
FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName);
}
FcPatternAddInteger(pattern, FC_WEIGHT,
(style & SkTypeface::kBold) ? FC_WEIGHT_BOLD
: FC_WEIGHT_NORMAL);
FcPatternAddInteger(pattern, FC_SLANT,
(style & SkTypeface::kItalic) ? FC_SLANT_ITALIC
: FC_SLANT_ROMAN);
FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
FcConfigSubstitute(NULL, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
// Font matching:
// CSS often specifies a fallback list of families:
// font-family: a, b, c, serif;
// However, fontconfig will always do its best to find *a* font when asked
// for something so we need a way to tell if the match which it has found is
// "good enough" for us. Otherwise, we can return NULL which gets piped up
// and lets WebKit know to try the next CSS family name. However, fontconfig
// configs allow substitutions (mapping "Arial -> Helvetica" etc) and we
// wish to support that.
//
// Thus, if a specific family is requested we set @family_requested. Then we
// record two strings: the family name after config processing and the
// family name after resolving. If the two are equal, it's a good match.
//
// So consider the case where a user has mapped Arial to Helvetica in their
// config.
// requested family: "Arial"
// post_config_family: "Helvetica"
// post_match_family: "Helvetica"
// -> good match
//
// and for a missing font:
// requested family: "Monaco"
// post_config_family: "Monaco"
// post_match_family: "Times New Roman"
// -> BAD match
//
// However, we special-case fallback fonts; see IsFallbackFontAllowed().
const char* post_config_family = get_name(pattern, FC_FAMILY);
if (!post_config_family) {
// we can just continue with an empty name, e.g. default font
post_config_family = "";
}
FcResult result;
FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result);
if (!font_set) {
FcPatternDestroy(pattern);
return false;
}
FcPattern* match = MatchFont(font_set, post_config_family, familyStr);
if (!match) {
FcPatternDestroy(pattern);
FcFontSetDestroy(font_set);
return false;
}
FcPatternDestroy(pattern);
// From here out we just extract our results from 'match'
post_config_family = get_name(match, FC_FAMILY);
if (!post_config_family) {
FcFontSetDestroy(font_set);
return false;
}
const char* c_filename = get_name(match, FC_FILE);
if (!c_filename) {
FcFontSetDestroy(font_set);
return false;
}
int face_index;
if (FcPatternGetInteger(match, FC_INDEX, 0, &face_index) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
FcFontSetDestroy(font_set);
if (outIdentity) {
outIdentity->fTTCIndex = face_index;
outIdentity->fString.set(c_filename);
}
if (outFamilyName) {
outFamilyName->set(post_config_family);
}
if (outStyle) {
*outStyle = GetFontStyle(match);
}
return true;
}
bool SkFontConfigInterfaceDirect::matchFamilySet(const char inFamilyName[],
SkString* outFamilyName,
SkTArray<FontIdentity>* ids) {
SkAutoMutexAcquire ac(mutex_);
#if 0
SkString familyStr(familyName ? familyName : "");
if (familyStr.size() > kMaxFontFamilyLength) {
return false;
}
SkAutoMutexAcquire ac(mutex_);
FcPattern* pattern = FcPatternCreate();
if (familyName) {
FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName);
}
FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
FcConfigSubstitute(NULL, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
// Font matching:
// CSS often specifies a fallback list of families:
// font-family: a, b, c, serif;
// However, fontconfig will always do its best to find *a* font when asked
// for something so we need a way to tell if the match which it has found is
// "good enough" for us. Otherwise, we can return NULL which gets piped up
// and lets WebKit know to try the next CSS family name. However, fontconfig
// configs allow substitutions (mapping "Arial -> Helvetica" etc) and we
// wish to support that.
//
// Thus, if a specific family is requested we set @family_requested. Then we
// record two strings: the family name after config processing and the
// family name after resolving. If the two are equal, it's a good match.
//
// So consider the case where a user has mapped Arial to Helvetica in their
// config.
// requested family: "Arial"
// post_config_family: "Helvetica"
// post_match_family: "Helvetica"
// -> good match
//
// and for a missing font:
// requested family: "Monaco"
// post_config_family: "Monaco"
// post_match_family: "Times New Roman"
// -> BAD match
//
// However, we special-case fallback fonts; see IsFallbackFontAllowed().
const char* post_config_family = get_name(pattern, FC_FAMILY);
FcResult result;
FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result);
if (!font_set) {
FcPatternDestroy(pattern);
return false;
}
FcPattern* match = MatchFont(font_set, post_config_family, familyStr);
if (!match) {
FcPatternDestroy(pattern);
FcFontSetDestroy(font_set);
return false;
}
FcPatternDestroy(pattern);
// From here out we just extract our results from 'match'
if (FcPatternGetString(match, FC_FAMILY, 0, &post_config_family) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
FcChar8* c_filename;
if (FcPatternGetString(match, FC_FILE, 0, &c_filename) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
int face_index;
if (FcPatternGetInteger(match, FC_INDEX, 0, &face_index) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
FcFontSetDestroy(font_set);
if (outIdentity) {
outIdentity->fTTCIndex = face_index;
outIdentity->fString.set((const char*)c_filename);
}
if (outFamilyName) {
outFamilyName->set((const char*)post_config_family);
}
if (outStyle) {
*outStyle = GetFontStyle(match);
}
return true;
////////////////////
int count;
FcPattern** match = MatchFont(font_set, post_config_family, &count);
if (!match) {
FcPatternDestroy(pattern);
FcFontSetDestroy(font_set);
return NULL;
}
FcPatternDestroy(pattern);
SkTDArray<FcPattern*> trimmedMatches;
for (int i = 0; i < count; ++i) {
const char* justName = find_just_name(get_name(match[i], FC_FILE));
if (!is_lower(*justName)) {
*trimmedMatches.append() = match[i];
}
}
SkFontStyleSet_FC* sset = new SkFontStyleSet_FC (trimmedMatches.begin(), trimmedMatches.count());
#endif
return false;
}
bool FontConfigDirect::Match(std::string* result_family,
unsigned* result_filefaceid,
bool filefaceid_valid, unsigned filefaceid,
const std::string& family,
const void* data, size_t characters_bytes,
bool* is_bold, bool* is_italic) {
if (family.length() > kMaxFontFamilyLength)
return false;
SkAutoMutexAcquire ac(mutex_);
// Given |family|, |is_bold| and |is_italic| but not |data|, the result will
// be a function of these three parameters, and thus eligible for caching.
// This is the fast path for |SkTypeface::CreateFromName()|.
bool eligible_for_cache = !family.empty() && is_bold && is_italic && !data;
if (eligible_for_cache) {
int style = (*is_bold ? SkTypeface::kBold : 0 ) |
(*is_italic ? SkTypeface::kItalic : 0);
FontMatchKey key = FontMatchKey(family, style);
const std::map<FontMatchKey, FontMatch>::const_iterator i =
font_match_cache_.find(key);
if (i != font_match_cache_.end()) {
*is_bold = i->second.is_bold;
*is_italic = i->second.is_italic;
if (result_family)
*result_family = i->second.family;
if (result_filefaceid)
*result_filefaceid = i->second.filefaceid;
return true;
}
}
FcPattern* pattern = FcPatternCreate();
if (filefaceid_valid) {
const std::map<unsigned, std::string>::const_iterator
i = fileid_to_filename_.find(FileFaceIdToFileId(filefaceid));
if (i == fileid_to_filename_.end()) {
FcPatternDestroy(pattern);
return false;
}
int face_index = filefaceid & 0xfu;
FcPatternAddString(pattern, FC_FILE,
reinterpret_cast<const FcChar8*>(i->second.c_str()));
// face_index is added only when family is empty because it is not
// necessary to uniquiely identify a font if both file and
// family are given.
if (family.empty())
FcPatternAddInteger(pattern, FC_INDEX, face_index);
}
if (!family.empty()) {
FcPatternAddString(pattern, FC_FAMILY, (FcChar8*) family.c_str());
}
FcCharSet* charset = NULL;
if (data) {
charset = FcCharSetCreate();
const uint16_t* chars = (const uint16_t*) data;
size_t num_chars = characters_bytes / 2;
for (size_t i = 0; i < num_chars; ++i) {
if (U16_IS_SURROGATE(chars[i])
&& U16_IS_SURROGATE_LEAD(chars[i])
&& i != num_chars - 1
&& U16_IS_TRAIL(chars[i + 1])) {
FcCharSetAddChar(charset, U16_GET_SUPPLEMENTARY(chars[i], chars[i+1]));
i++;
} else {
FcCharSetAddChar(charset, chars[i]);
}
}
FcPatternAddCharSet(pattern, FC_CHARSET, charset);
FcCharSetDestroy(charset); // pattern now owns it.
}
FcPatternAddInteger(pattern, FC_WEIGHT,
is_bold && *is_bold ? FC_WEIGHT_BOLD
: FC_WEIGHT_NORMAL);
FcPatternAddInteger(pattern, FC_SLANT,
is_italic && *is_italic ? FC_SLANT_ITALIC
: FC_SLANT_ROMAN);
FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
FcConfigSubstitute(NULL, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
// Font matching:
// CSS often specifies a fallback list of families:
// font-family: a, b, c, serif;
// However, fontconfig will always do its best to find *a* font when asked
// for something so we need a way to tell if the match which it has found is
// "good enough" for us. Otherwise, we can return NULL which gets piped up
// and lets WebKit know to try the next CSS family name. However, fontconfig
// configs allow substitutions (mapping "Arial -> Helvetica" etc) and we
// wish to support that.
//
// Thus, if a specific family is requested we set @family_requested. Then we
// record two strings: the family name after config processing and the
// family name after resolving. If the two are equal, it's a good match.
//
// So consider the case where a user has mapped Arial to Helvetica in their
// config.
// requested family: "Arial"
// post_config_family: "Helvetica"
// post_match_family: "Helvetica"
// -> good match
//
// and for a missing font:
// requested family: "Monaco"
// post_config_family: "Monaco"
// post_match_family: "Times New Roman"
// -> BAD match
//
// However, we special-case fallback fonts; see IsFallbackFontAllowed().
FcChar8* post_config_family;
FcPatternGetString(pattern, FC_FAMILY, 0, &post_config_family);
FcResult result;
FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result);
if (!font_set) {
FcPatternDestroy(pattern);
return false;
}
FcPattern* match = MatchFont(font_set, post_config_family, family);
if (!match) {
FcPatternDestroy(pattern);
FcFontSetDestroy(font_set);
return false;
}
FcPatternDestroy(pattern);
FcChar8* c_filename;
if (FcPatternGetString(match, FC_FILE, 0, &c_filename) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
int face_index;
if (FcPatternGetInteger(match, FC_INDEX, 0, &face_index) != FcResultMatch) {
FcFontSetDestroy(font_set);
return false;
}
FontMatch font_match;
if (filefaceid_valid) {
font_match.filefaceid = filefaceid;
} else {
unsigned out_fileid;
const std::string filename(reinterpret_cast<char*>(c_filename));
const std::map<std::string, unsigned>::const_iterator
i = filename_to_fileid_.find(filename);
if (i == filename_to_fileid_.end()) {
out_fileid = next_file_id_++;
filename_to_fileid_[filename] = out_fileid;
fileid_to_filename_[out_fileid] = filename;
} else {
out_fileid = i->second;
}
// fileid stored in filename_to_fileid_ and fileid_to_filename_ is
// unique only up to the font file. We have to encode face_index for
// the out param.
font_match.filefaceid =
FileIdAndFaceIndexToFileFaceId(out_fileid, face_index);
}
bool success = GetFontProperties(match,
&font_match.family,
&font_match.is_bold,
&font_match.is_italic);
FcFontSetDestroy(font_set);
if (success) {
// If eligible, cache the result of the matching.
if (eligible_for_cache) {
int style = (*is_bold ? SkTypeface::kBold : 0 ) |
(*is_italic ? SkTypeface::kItalic : 0);
font_match_cache_[FontMatchKey(family, style)] = font_match;
}
if (result_family)
*result_family = font_match.family;
if (result_filefaceid)
*result_filefaceid = font_match.filefaceid;
if (is_bold)
*is_bold = font_match.is_bold;
if (is_italic)
*is_italic = font_match.is_italic;
}
return success;
}
