diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/ports/SkFontConfigInterface_direct.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/ports/SkFontConfigInterface_direct.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,736 @@
+/*
+ * Copyright 2009 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */
+
+#include <string>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <fontconfig/fontconfig.h>
+
+#include "SkBuffer.h"
+#include "SkFontConfigInterface.h"
+#include "SkStream.h"
+
+size_t SkFontConfigInterface::FontIdentity::writeToMemory(void* addr) const {
+    size_t size = sizeof(fID) + sizeof(fTTCIndex);
+    size += sizeof(int32_t) + sizeof(int32_t) + sizeof(uint8_t); // weight, width, italic
+    size += sizeof(int32_t) + fString.size();    // store length+data
+    if (addr) {
+        SkWBuffer buffer(addr, size);
+
+        buffer.write32(fID);
+        buffer.write32(fTTCIndex);
+        buffer.write32(fString.size());
+        buffer.write32(fStyle.weight());
+        buffer.write32(fStyle.width());
+        buffer.write8(fStyle.slant());
+        buffer.write(fString.c_str(), fString.size());
+        buffer.padToAlign4();
+
+        SkASSERT(buffer.pos() == size);
+    }
+    return size;
+}
+
+size_t SkFontConfigInterface::FontIdentity::readFromMemory(const void* addr,
+                                                           size_t size) {
+    SkRBuffer buffer(addr, size);
+
+    (void)buffer.readU32(&fID);
+    (void)buffer.readS32(&fTTCIndex);
+    uint32_t strLen, weight, width;
+    (void)buffer.readU32(&strLen);
+    (void)buffer.readU32(&weight);
+    (void)buffer.readU32(&width);
+    uint8_t u8;
+    (void)buffer.readU8(&u8);
+    SkFontStyle::Slant slant = (SkFontStyle::Slant)u8;
+    fStyle = SkFontStyle(weight, width, slant);
+    fString.resize(strLen);
+    (void)buffer.read(fString.writable_str(), strLen);
+    buffer.skipToAlign4();
+
+    return buffer.pos();    // the actual number of bytes read
+}
+
+#ifdef SK_DEBUG
+static void make_iden(SkFontConfigInterface::FontIdentity* iden) {
+    iden->fID = 10;
+    iden->fTTCIndex = 2;
+    iden->fString.set("Hello world");
+    iden->fStyle = SkFontStyle(300, 6, SkFontStyle::kItalic_Slant);
+}
+
+static void test_writeToMemory(const SkFontConfigInterface::FontIdentity& iden0,
+                               int initValue) {
+    SkFontConfigInterface::FontIdentity iden1;
+
+    size_t size0 = iden0.writeToMemory(NULL);
+
+    SkAutoMalloc storage(size0);
+    memset(storage.get(), initValue, size0);
+
+    size_t size1 = iden0.writeToMemory(storage.get());
+    SkASSERT(size0 == size1);
+
+    SkASSERT(iden0 != iden1);
+    size_t size2 = iden1.readFromMemory(storage.get(), size1);
+    SkASSERT(size2 == size1);
+    SkASSERT(iden0 == iden1);
+}
+
+static void fontconfiginterface_unittest() {
+    SkFontConfigInterface::FontIdentity iden0, iden1;
+
+    SkASSERT(iden0 == iden1);
+
+    make_iden(&iden0);
+    SkASSERT(iden0 != iden1);
+
+    make_iden(&iden1);
+    SkASSERT(iden0 == iden1);
+
+    test_writeToMemory(iden0, 0);
+    test_writeToMemory(iden0, 0);
+}
+#endif
+
+class SkFontConfigInterfaceDirect : public SkFontConfigInterface {
+public:
+            SkFontConfigInterfaceDirect();
+    virtual ~SkFontConfigInterfaceDirect();
+
+    virtual bool matchFamilyName(const char familyName[],
+                                 SkTypeface::Style requested,
+                                 FontIdentity* outFontIdentifier,
+                                 SkString* outFamilyName,
+                                 SkTypeface::Style* outStyle) SK_OVERRIDE;
+    virtual SkStream* openStream(const FontIdentity&) SK_OVERRIDE;
+
+    // new APIs
+    virtual SkDataTable* getFamilyNames() SK_OVERRIDE;
+    virtual bool matchFamilySet(const char inFamilyName[],
+                                SkString* outFamilyName,
+                                SkTArray<FontIdentity>*) SK_OVERRIDE;
+
+private:
+    SkMutex mutex_;
+};
+
+SkFontConfigInterface* SkFontConfigInterface::GetSingletonDirectInterface() {
+    static SkFontConfigInterface* gDirect;
+    if (NULL == gDirect) {
+        static SkMutex gMutex;
+        SkAutoMutexAcquire ac(gMutex);
+
+        if (NULL == gDirect) {
+            gDirect = new SkFontConfigInterfaceDirect;
+        }
+    }
+    return gDirect;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+// Returns the string from the pattern, or NULL
+static const char* get_name(FcPattern* pattern, const char field[],
+                            int index = 0) {
+    const char* name;
+    if (FcPatternGetString(pattern, field, index,
+                           (FcChar8**)&name) != FcResultMatch) {
+        name = NULL;
+    }
+    return name;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+namespace {
+
+// Equivalence classes, used to match the Liberation and other fonts
+// with their metric-compatible replacements.  See the discussion in
+// GetFontEquivClass().
+enum FontEquivClass
+{
+    OTHER,
+    SANS,
+    SERIF,
+    MONO,
+    SYMBOL,
+    PGOTHIC,
+    GOTHIC,
+    PMINCHO,
+    MINCHO,
+    SIMSUN,
+    NSIMSUN,
+    SIMHEI,
+    PMINGLIU,
+    MINGLIU,
+    PMINGLIUHK,
+    MINGLIUHK,
+    CAMBRIA,
+    CALIBRI,
+};
+
+// Match the font name against a whilelist of fonts, returning the equivalence
+// class.
+FontEquivClass GetFontEquivClass(const char* fontname)
+{
+    // It would be nice for fontconfig to tell us whether a given suggested
+    // replacement is a "strong" match (that is, an equivalent font) or
+    // a "weak" match (that is, fontconfig's next-best attempt at finding a
+    // substitute).  However, I played around with the fontconfig API for
+    // a good few hours and could not make it reveal this information.
+    //
+    // So instead, we hardcode.  Initially this function emulated
+    //   /etc/fonts/conf.d/30-metric-aliases.conf
+    // from my Ubuntu system, but we're better off being very conservative.
+
+    // Arimo, Tinos and Cousine are a set of fonts metric-compatible with
+    // Arial, Times New Roman and Courier New  with a character repertoire
+    // much larger than Liberation. Note that Cousine is metrically
+    // compatible with Courier New, but the former is sans-serif while
+    // the latter is serif.
+
+
+    struct FontEquivMap {
+        FontEquivClass clazz;
+        const char name[40];
+    };
+
+    static const FontEquivMap kFontEquivMap[] = {
+        { SANS, "Arial" },
+        { SANS, "Arimo" },
+        { SANS, "Liberation Sans" },
+
+        { SERIF, "Times New Roman" },
+        { SERIF, "Tinos" },
+        { SERIF, "Liberation Serif" },
+
+        { MONO, "Courier New" },
+        { MONO, "Cousine" },
+        { MONO, "Liberation Mono" },
+
+        { SYMBOL, "Symbol" },
+        { SYMBOL, "Symbol Neu" },
+
+        // ＭＳ Ｐゴシック
+        { PGOTHIC, "MS PGothic" },
+        { PGOTHIC, "\xef\xbc\xad\xef\xbc\xb3 \xef\xbc\xb0"
+                   "\xe3\x82\xb4\xe3\x82\xb7\xe3\x83\x83\xe3\x82\xaf" },
+        { PGOTHIC, "IPAPGothic" },
+        { PGOTHIC, "MotoyaG04Gothic" },
+
+        // ＭＳ ゴシック
+        { GOTHIC, "MS Gothic" },
+        { GOTHIC, "\xef\xbc\xad\xef\xbc\xb3 "
+                  "\xe3\x82\xb4\xe3\x82\xb7\xe3\x83\x83\xe3\x82\xaf" },
+        { GOTHIC, "IPAGothic" },
+        { GOTHIC, "MotoyaG04GothicMono" },
+
+        // ＭＳ Ｐ明朝
+        { PMINCHO, "MS PMincho" },
+        { PMINCHO, "\xef\xbc\xad\xef\xbc\xb3 \xef\xbc\xb0"
+                   "\xe6\x98\x8e\xe6\x9c\x9d"},
+        { PMINCHO, "IPAPMincho" },
+        { PMINCHO, "MotoyaG04Mincho" },
+
+        // ＭＳ 明朝
+        { MINCHO, "MS Mincho" },
+        { MINCHO, "\xef\xbc\xad\xef\xbc\xb3 \xe6\x98\x8e\xe6\x9c\x9d" },
+        { MINCHO, "IPAMincho" },
+        { MINCHO, "MotoyaG04MinchoMono" },
+
+        // 宋体
+        { SIMSUN, "Simsun" },
+        { SIMSUN, "\xe5\xae\x8b\xe4\xbd\x93" },
+        { SIMSUN, "MSung GB18030" },
+        { SIMSUN, "Song ASC" },
+
+        // 新宋体
+        { NSIMSUN, "NSimsun" },
+        { NSIMSUN, "\xe6\x96\xb0\xe5\xae\x8b\xe4\xbd\x93" },
+        { NSIMSUN, "MSung GB18030" },
+        { NSIMSUN, "N Song ASC" },
+
+        // 黑体
+        { SIMHEI, "Simhei" },
+        { SIMHEI, "\xe9\xbb\x91\xe4\xbd\x93" },
+        { SIMHEI, "MYingHeiGB18030" },
+        { SIMHEI, "MYingHeiB5HK" },
+
+        // 新細明體
+        { PMINGLIU, "PMingLiU"},
+        { PMINGLIU, "\xe6\x96\xb0\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94" },
+        { PMINGLIU, "MSung B5HK"},
+
+        // 細明體
+        { MINGLIU, "MingLiU"},
+        { MINGLIU, "\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94" },
+        { MINGLIU, "MSung B5HK"},
+
+        // 新細明體
+        { PMINGLIUHK, "PMingLiU_HKSCS"},
+        { PMINGLIUHK, "\xe6\x96\xb0\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94_HKSCS" },
+        { PMINGLIUHK, "MSung B5HK"},
+
+        // 細明體
+        { MINGLIUHK, "MingLiU_HKSCS"},
+        { MINGLIUHK, "\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94_HKSCS" },
+        { MINGLIUHK, "MSung B5HK"},
+
+        // Cambria
+        { CAMBRIA, "Cambria" },
+        { CAMBRIA, "Caladea" },
+
+        // Calibri
+        { CALIBRI, "Calibri" },
+        { CALIBRI, "Carlito" },
+    };
+
+    static const size_t kFontCount =
+        sizeof(kFontEquivMap)/sizeof(kFontEquivMap[0]);
+
+    // TODO(jungshik): If this loop turns out to be hot, turn
+    // the array to a static (hash)map to speed it up.
+    for (size_t i = 0; i < kFontCount; ++i) {
+        if (strcasecmp(kFontEquivMap[i].name, fontname) == 0)
+            return kFontEquivMap[i].clazz;
+    }
+    return OTHER;
+}
+
+
+// Return true if |font_a| and |font_b| are visually and at the metrics
+// level interchangeable.
+bool IsMetricCompatibleReplacement(const char* font_a, const char* font_b)
+{
+    FontEquivClass class_a = GetFontEquivClass(font_a);
+    FontEquivClass class_b = GetFontEquivClass(font_b);
+
+    return class_a != OTHER && class_a == class_b;
+}
+
+// Normally we only return exactly the font asked for. In last-resort
+// cases, the request either doesn't specify a font or is one of the
+// basic font names like "Sans", "Serif" or "Monospace". This function
+// tells you whether a given request is for such a fallback.
+bool IsFallbackFontAllowed(const std::string& family) {
+  const char* family_cstr = family.c_str();
+  return family.empty() ||
+         strcasecmp(family_cstr, "sans") == 0 ||
+         strcasecmp(family_cstr, "serif") == 0 ||
+         strcasecmp(family_cstr, "monospace") == 0;
+}
+
+static bool valid_pattern(FcPattern* pattern) {
+#ifdef SK_FONT_CONFIG_ONLY_ALLOW_SCALABLE_FONTS
+    FcBool is_scalable;
+    if (FcPatternGetBool(pattern, FC_SCALABLE, 0, &is_scalable) != FcResultMatch
+        || !is_scalable) {
+        return false;
+    }
+#endif
+
+    // fontconfig can also return fonts which are unreadable
+    const char* c_filename = get_name(pattern, FC_FILE);
+    if (!c_filename) {
+        return false;
+    }
+    if (access(c_filename, R_OK) != 0) {
+        return false;
+    }
+    return true;
+}
+
+// Find matching font from |font_set| for the given font family.
+FcPattern* MatchFont(FcFontSet* font_set,
+                     const char* post_config_family,
+                     const std::string& family) {
+  // Older versions of fontconfig have a bug where they cannot select
+  // only scalable fonts so we have to manually filter the results.
+  FcPattern* match = NULL;
+  for (int i = 0; i < font_set->nfont; ++i) {
+    FcPattern* current = font_set->fonts[i];
+    if (valid_pattern(current)) {
+      match = current;
+      break;
+    }
+  }
+
+  if (match && !IsFallbackFontAllowed(family)) {
+    bool acceptable_substitute = false;
+    for (int id = 0; id < 255; ++id) {
+      const char* post_match_family = get_name(match, FC_FAMILY, id);
+      if (!post_match_family)
+        break;
+      acceptable_substitute =
+          (strcasecmp(post_config_family, post_match_family) == 0 ||
+           // Workaround for Issue 12530:
+           //   requested family: "Bitstream Vera Sans"
+           //   post_config_family: "Arial"
+           //   post_match_family: "Bitstream Vera Sans"
+           // -> We should treat this case as a good match.
+           strcasecmp(family.c_str(), post_match_family) == 0) ||
+           IsMetricCompatibleReplacement(family.c_str(), post_match_family);
+      if (acceptable_substitute)
+        break;
+    }
+    if (!acceptable_substitute)
+      return NULL;
+  }
+
+  return match;
+}
+
+// Retrieves |is_bold|, |is_italic| and |font_family| properties from |font|.
+SkTypeface::Style GetFontStyle(FcPattern* font) {
+    int resulting_bold;
+    if (FcPatternGetInteger(font, FC_WEIGHT, 0, &resulting_bold))
+        resulting_bold = FC_WEIGHT_NORMAL;
+
+    int resulting_italic;
+    if (FcPatternGetInteger(font, FC_SLANT, 0, &resulting_italic))
+        resulting_italic = FC_SLANT_ROMAN;
+
+    // If we ask for an italic font, fontconfig might take a roman font and set
+    // the undocumented property FC_MATRIX to a skew matrix. It'll then say
+    // that the font is italic or oblique. So, if we see a matrix, we don't
+    // believe that it's italic.
+    FcValue matrix;
+    const bool have_matrix = FcPatternGet(font, FC_MATRIX, 0, &matrix) == 0;
+
+    // If we ask for an italic font, fontconfig might take a roman font and set
+    // FC_EMBOLDEN.
+    FcValue embolden;
+    const bool have_embolden = FcPatternGet(font, FC_EMBOLDEN, 0, &embolden) == 0;
+
+    int styleBits = 0;
+    if (resulting_bold > FC_WEIGHT_MEDIUM && !have_embolden) {
+        styleBits |= SkTypeface::kBold;
+    }
+    if (resulting_italic > FC_SLANT_ROMAN && !have_matrix) {
+        styleBits |= SkTypeface::kItalic;
+    }
+
+    return (SkTypeface::Style)styleBits;
+}
+
+}  // anonymous namespace
+
+///////////////////////////////////////////////////////////////////////////////
+
+#define kMaxFontFamilyLength    2048
+
+SkFontConfigInterfaceDirect::SkFontConfigInterfaceDirect() {
+    SkAutoMutexAcquire ac(mutex_);
+
+    FcInit();
+
+    SkDEBUGCODE(fontconfiginterface_unittest();)
+}
+
+SkFontConfigInterfaceDirect::~SkFontConfigInterfaceDirect() {
+}
+
+bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[],
+                                                  SkTypeface::Style style,
+                                                  FontIdentity* outIdentity,
+                                                  SkString* outFamilyName,
+                                                  SkTypeface::Style* outStyle) {
+    std::string familyStr(familyName ? familyName : "");
+    if (familyStr.length() > 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;
+}
+
+SkStream* SkFontConfigInterfaceDirect::openStream(const FontIdentity& identity) {
+    return SkStream::NewFromFile(identity.fString.c_str());
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+static bool find_name(const SkTDArray<const char*>& list, const char* str) {
+    int count = list.count();
+    for (int i = 0; i < count; ++i) {
+        if (!strcmp(list[i], str)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+SkDataTable* SkFontConfigInterfaceDirect::getFamilyNames() {
+    SkAutoMutexAcquire ac(mutex_);
+
+    FcPattern* pat = FcPatternCreate();
+    SkAutoTCallVProc<FcPattern, FcPatternDestroy> autoDestroyPat(pat);
+    if (NULL == pat) {
+        return NULL;
+    }
+
+    FcObjectSet* os = FcObjectSetBuild(FC_FAMILY, (char *)0);
+    SkAutoTCallVProc<FcObjectSet, FcObjectSetDestroy> autoDestroyOs(os);
+    if (NULL == os) {
+        return NULL;
+    }
+
+    FcFontSet* fs = FcFontList(NULL, pat, os);
+    SkAutoTCallVProc<FcFontSet, FcFontSetDestroy> autoDestroyFs(fs);
+    if (NULL == fs) {
+        return NULL;
+    }
+
+    SkTDArray<const char*> names;
+    SkTDArray<size_t> sizes;
+    for (int i = 0; i < fs->nfont; ++i) {
+        FcPattern* match = fs->fonts[i];
+        const char* famName = get_name(match, FC_FAMILY);
+        if (famName && !find_name(names, famName)) {
+            *names.append() = famName;
+            *sizes.append() = strlen(famName) + 1;
+        }
+    }
+
+    return SkDataTable::NewCopyArrays((const void*const*)names.begin(),
+                                      sizes.begin(), names.count());
+}
+
+bool SkFontConfigInterfaceDirect::matchFamilySet(const char inFamilyName[],
+                                                 SkString* outFamilyName,
+                                                 SkTArray<FontIdentity>* ids) {
+    SkAutoMutexAcquire ac(mutex_);
+
+#if 0
+    std::string familyStr(familyName ? familyName : "");
+    if (familyStr.length() > 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 = SkNEW_ARGS(SkFontStyleSet_FC,
+                                             (trimmedMatches.begin(),
+                                              trimmedMatches.count()));
+#endif
+    return false;
+}