Split SkFontHost_win_dw.

src/ports/SkFontMgr_win_dw.cpp

Index: src/ports/SkFontMgr_win_dw.cpp
diff --git a/src/ports/SkFontMgr_win_dw.cpp b/src/ports/SkFontMgr_win_dw.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..fe82258c6803e9aaaeb54fad4f9e346fa4a6895e
--- /dev/null
+++ b/src/ports/SkFontMgr_win_dw.cpp
@@ -0,0 +1,774 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkDWrite.h"
+#include "SkDWriteFontFileStream.h"
+#include "SkFontMgr.h"
+#include "SkHRESULT.h"
+#include "SkStream.h"
+#include "SkTScopedComPtr.h"
+#include "SkThread.h"
+#include "SkTypeface.h"
+#include "SkTypefaceCache.h"
+#include "SkTypeface_win_dw.h"
+#include "SkTypes.h"
+
+#include <dwrite.h>
+
+////////////////////////////////////////////////////////////////////////////////
+
+class StreamFontFileLoader : public IDWriteFontFileLoader {
+public:
+    // IUnknown methods
+    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
+    virtual ULONG STDMETHODCALLTYPE AddRef();
+    virtual ULONG STDMETHODCALLTYPE Release();
+
+    // IDWriteFontFileLoader methods
+    virtual HRESULT STDMETHODCALLTYPE CreateStreamFromKey(
+        void const* fontFileReferenceKey,
+        UINT32 fontFileReferenceKeySize,
+        IDWriteFontFileStream** fontFileStream);
+
+    static HRESULT Create(SkStream* stream, StreamFontFileLoader** streamFontFileLoader) {
+        *streamFontFileLoader = new StreamFontFileLoader(stream);
+        if (NULL == streamFontFileLoader) {
+            return E_OUTOFMEMORY;
+        }
+        return S_OK;
+    }
+
+    SkAutoTUnref<SkStream> fStream;
+
+private:
+    StreamFontFileLoader(SkStream* stream) : fRefCount(1), fStream(SkRef(stream)) { }
+
+    ULONG fRefCount;
+};
+
+HRESULT StreamFontFileLoader::QueryInterface(REFIID iid, void** ppvObject) {
+    if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileLoader)) {
+        *ppvObject = this;
+        AddRef();
+        return S_OK;
+    } else {
+        *ppvObject = NULL;
+        return E_NOINTERFACE;
+    }
+}
+
+ULONG StreamFontFileLoader::AddRef() {
+    return InterlockedIncrement(&fRefCount);
+}
+
+ULONG StreamFontFileLoader::Release() {
+    ULONG newCount = InterlockedDecrement(&fRefCount);
+    if (0 == newCount) {
+        delete this;
+    }
+    return newCount;
+}
+
+HRESULT StreamFontFileLoader::CreateStreamFromKey(
+    void const* fontFileReferenceKey,
+    UINT32 fontFileReferenceKeySize,
+    IDWriteFontFileStream** fontFileStream)
+{
+    SkTScopedComPtr<SkDWriteFontFileStreamWrapper> stream;
+    HR(SkDWriteFontFileStreamWrapper::Create(fStream, &stream));
+    *fontFileStream = stream.release();
+    return S_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+class StreamFontFileEnumerator : public IDWriteFontFileEnumerator {
+public:
+    // IUnknown methods
+    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
+    virtual ULONG STDMETHODCALLTYPE AddRef();
+    virtual ULONG STDMETHODCALLTYPE Release();
+
+    // IDWriteFontFileEnumerator methods
+    virtual HRESULT STDMETHODCALLTYPE MoveNext(BOOL* hasCurrentFile);
+    virtual HRESULT STDMETHODCALLTYPE GetCurrentFontFile(IDWriteFontFile** fontFile);
+
+    static HRESULT Create(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader,
+                          StreamFontFileEnumerator** streamFontFileEnumerator) {
+        *streamFontFileEnumerator = new StreamFontFileEnumerator(factory, fontFileLoader);
+        if (NULL == streamFontFileEnumerator) {
+            return E_OUTOFMEMORY;
+        }
+        return S_OK;
+    }
+private:
+    StreamFontFileEnumerator(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader);
+    ULONG fRefCount;
+
+    SkTScopedComPtr<IDWriteFactory> fFactory;
+    SkTScopedComPtr<IDWriteFontFile> fCurrentFile;
+    SkTScopedComPtr<IDWriteFontFileLoader> fFontFileLoader;
+    bool fHasNext;
+};
+
+StreamFontFileEnumerator::StreamFontFileEnumerator(IDWriteFactory* factory,
+                                                   IDWriteFontFileLoader* fontFileLoader)
+    : fRefCount(1)
+    , fFactory(SkRefComPtr(factory))
+    , fCurrentFile()
+    , fFontFileLoader(SkRefComPtr(fontFileLoader))
+    , fHasNext(true)
+{ }
+
+HRESULT StreamFontFileEnumerator::QueryInterface(REFIID iid, void** ppvObject) {
+    if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileEnumerator)) {
+        *ppvObject = this;
+        AddRef();
+        return S_OK;
+    } else {
+        *ppvObject = NULL;
+        return E_NOINTERFACE;
+    }
+}
+
+ULONG StreamFontFileEnumerator::AddRef() {
+    return InterlockedIncrement(&fRefCount);
+}
+
+ULONG StreamFontFileEnumerator::Release() {
+    ULONG newCount = InterlockedDecrement(&fRefCount);
+    if (0 == newCount) {
+        delete this;
+    }
+    return newCount;
+}
+
+HRESULT StreamFontFileEnumerator::MoveNext(BOOL* hasCurrentFile) {
+    *hasCurrentFile = FALSE;
+
+    if (!fHasNext) {
+        return S_OK;
+    }
+    fHasNext = false;
+
+    UINT32 dummy = 0;
+    HR(fFactory->CreateCustomFontFileReference(
+            &dummy, //cannot be NULL
+            sizeof(dummy), //even if this is 0
+            fFontFileLoader.get(),
+            &fCurrentFile));
+
+    *hasCurrentFile = TRUE;
+    return S_OK;
+}
+
+HRESULT StreamFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile) {
+    if (fCurrentFile.get() == NULL) {
+        *fontFile = NULL;
+        return E_FAIL;
+    }
+
+    *fontFile = SkRefComPtr(fCurrentFile.get());
+    return  S_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+class StreamFontCollectionLoader : public IDWriteFontCollectionLoader {
+public:
+    // IUnknown methods
+    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** ppvObject);
+    virtual ULONG STDMETHODCALLTYPE AddRef();
+    virtual ULONG STDMETHODCALLTYPE Release();
+
+    // IDWriteFontCollectionLoader methods
+    virtual HRESULT STDMETHODCALLTYPE CreateEnumeratorFromKey(
+        IDWriteFactory* factory,
+        void const* collectionKey,
+        UINT32 collectionKeySize,
+        IDWriteFontFileEnumerator** fontFileEnumerator);
+
+    static HRESULT Create(IDWriteFontFileLoader* fontFileLoader,
+                          StreamFontCollectionLoader** streamFontCollectionLoader) {
+        *streamFontCollectionLoader = new StreamFontCollectionLoader(fontFileLoader);
+        if (NULL == streamFontCollectionLoader) {
+            return E_OUTOFMEMORY;
+        }
+        return S_OK;
+    }
+private:
+    StreamFontCollectionLoader(IDWriteFontFileLoader* fontFileLoader)
+        : fRefCount(1)
+        , fFontFileLoader(SkRefComPtr(fontFileLoader))
+    { }
+
+    ULONG fRefCount;
+    SkTScopedComPtr<IDWriteFontFileLoader> fFontFileLoader;
+};
+
+HRESULT StreamFontCollectionLoader::QueryInterface(REFIID iid, void** ppvObject) {
+    if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontCollectionLoader)) {
+        *ppvObject = this;
+        AddRef();
+        return S_OK;
+    } else {
+        *ppvObject = NULL;
+        return E_NOINTERFACE;
+    }
+}
+
+ULONG StreamFontCollectionLoader::AddRef() {
+    return InterlockedIncrement(&fRefCount);
+}
+
+ULONG StreamFontCollectionLoader::Release() {
+    ULONG newCount = InterlockedDecrement(&fRefCount);
+    if (0 == newCount) {
+        delete this;
+    }
+    return newCount;
+}
+
+HRESULT StreamFontCollectionLoader::CreateEnumeratorFromKey(
+    IDWriteFactory* factory,
+    void const* collectionKey,
+    UINT32 collectionKeySize,
+    IDWriteFontFileEnumerator** fontFileEnumerator)
+{
+    SkTScopedComPtr<StreamFontFileEnumerator> enumerator;
+    HR(StreamFontFileEnumerator::Create(factory, fFontFileLoader.get(), &enumerator));
+    *fontFileEnumerator = enumerator.release();
+    return S_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+class SkFontMgr_DirectWrite : public SkFontMgr {
+public:
+    /** localeNameLength must include the null terminator. */
+    SkFontMgr_DirectWrite(IDWriteFactory* factory, IDWriteFontCollection* fontCollection,
+                          WCHAR* localeName, int localeNameLength)
+        : fFactory(SkRefComPtr(factory))
+        , fFontCollection(SkRefComPtr(fontCollection))
+        , fLocaleName(localeNameLength)
+    {
+        memcpy(fLocaleName.get(), localeName, localeNameLength * sizeof(WCHAR));
+    }
+
+    /** Creates a typeface using a typeface cache. */
+    SkTypeface* createTypefaceFromDWriteFont(IDWriteFontFace* fontFace,
+                                             IDWriteFont* font,
+                                             IDWriteFontFamily* fontFamily) const;
+
+protected:
+    virtual int onCountFamilies() const SK_OVERRIDE;
+    virtual void onGetFamilyName(int index, SkString* familyName) const SK_OVERRIDE;
+    virtual SkFontStyleSet* onCreateStyleSet(int index) const SK_OVERRIDE;
+    virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const SK_OVERRIDE;
+    virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
+                                           const SkFontStyle& fontstyle) const SK_OVERRIDE;
+    virtual SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember,
+                                         const SkFontStyle& fontstyle) const SK_OVERRIDE;
+    virtual SkTypeface* onCreateFromStream(SkStream* stream, int ttcIndex) const SK_OVERRIDE;
+    virtual SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const SK_OVERRIDE;
+    virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const SK_OVERRIDE;
+    virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
+                                               unsigned styleBits) const SK_OVERRIDE;
+
+private:
+    HRESULT getByFamilyName(const WCHAR familyName[], IDWriteFontFamily** fontFamily) const;
+    HRESULT getDefaultFontFamily(IDWriteFontFamily** fontFamily) const;
+
+    void Add(SkTypeface* face, SkTypeface::Style requestedStyle, bool strong) const {
+        SkAutoMutexAcquire ama(fTFCacheMutex);
+        fTFCache.add(face, requestedStyle, strong);
+    }
+
+    SkTypeface* FindByProcAndRef(SkTypefaceCache::FindProc proc, void* ctx) const {
+        SkAutoMutexAcquire ama(fTFCacheMutex);
+        SkTypeface* typeface = fTFCache.findByProcAndRef(proc, ctx);
+        return typeface;
+    }
+
+    SkTScopedComPtr<IDWriteFactory> fFactory;
+    SkTScopedComPtr<IDWriteFontCollection> fFontCollection;
+    SkSMallocWCHAR fLocaleName;
+    mutable SkMutex fTFCacheMutex;
+    mutable SkTypefaceCache fTFCache;
+
+    friend class SkFontStyleSet_DirectWrite;
+};
+
+class SkFontStyleSet_DirectWrite : public SkFontStyleSet {
+public:
+    SkFontStyleSet_DirectWrite(const SkFontMgr_DirectWrite* fontMgr,
+                               IDWriteFontFamily* fontFamily)
+        : fFontMgr(SkRef(fontMgr))
+        , fFontFamily(SkRefComPtr(fontFamily))
+    { }
+
+    virtual int count() SK_OVERRIDE;
+    virtual void getStyle(int index, SkFontStyle* fs, SkString* styleName) SK_OVERRIDE;
+    virtual SkTypeface* createTypeface(int index) SK_OVERRIDE;
+    virtual SkTypeface* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE;
+
+private:
+    SkAutoTUnref<const SkFontMgr_DirectWrite> fFontMgr;
+    SkTScopedComPtr<IDWriteFontFamily> fFontFamily;
+};
+
+static bool are_same(IUnknown* a, IUnknown* b) {
+    SkTScopedComPtr<IUnknown> iunkA;
+    if (FAILED(a->QueryInterface(&iunkA))) {
+        return false;
+    }
+
+    SkTScopedComPtr<IUnknown> iunkB;
+    if (FAILED(b->QueryInterface(&iunkB))) {
+        return false;
+    }
+
+    return iunkA.get() == iunkB.get();
+}
+
+static bool FindByDWriteFont(SkTypeface* face, SkTypeface::Style, void* ctx) {
+    //Check to see if the two fonts are identical.
+    DWriteFontTypeface* dwFace = reinterpret_cast<DWriteFontTypeface*>(face);
+    IDWriteFont* dwFont = reinterpret_cast<IDWriteFont*>(ctx);
+    if (are_same(dwFace->fDWriteFont.get(), dwFont)) {
+        return true;
+    }
+
+    //Check if the two fonts share the same loader and have the same key.
+    SkTScopedComPtr<IDWriteFontFace> dwFaceFontFace;
+    SkTScopedComPtr<IDWriteFontFace> dwFontFace;
+    HRB(dwFace->fDWriteFont->CreateFontFace(&dwFaceFontFace));
+    HRB(dwFont->CreateFontFace(&dwFontFace));
+    if (are_same(dwFaceFontFace.get(), dwFontFace.get())) {
+        return true;
+    }
+
+    UINT32 dwFaceNumFiles;
+    UINT32 dwNumFiles;
+    HRB(dwFaceFontFace->GetFiles(&dwFaceNumFiles, NULL));
+    HRB(dwFontFace->GetFiles(&dwNumFiles, NULL));
+    if (dwFaceNumFiles != dwNumFiles) {
+        return false;
+    }
+
+    SkTScopedComPtr<IDWriteFontFile> dwFaceFontFile;
+    SkTScopedComPtr<IDWriteFontFile> dwFontFile;
+    HRB(dwFaceFontFace->GetFiles(&dwFaceNumFiles, &dwFaceFontFile));
+    HRB(dwFontFace->GetFiles(&dwNumFiles, &dwFontFile));
+
+    //for (each file) { //we currently only admit fonts from one file.
+    SkTScopedComPtr<IDWriteFontFileLoader> dwFaceFontFileLoader;
+    SkTScopedComPtr<IDWriteFontFileLoader> dwFontFileLoader;
+    HRB(dwFaceFontFile->GetLoader(&dwFaceFontFileLoader));
+    HRB(dwFontFile->GetLoader(&dwFontFileLoader));
+    if (!are_same(dwFaceFontFileLoader.get(), dwFontFileLoader.get())) {
+        return false;
+    }
+    //}
+
+    const void* dwFaceFontRefKey;
+    UINT32 dwFaceFontRefKeySize;
+    const void* dwFontRefKey;
+    UINT32 dwFontRefKeySize;
+    HRB(dwFaceFontFile->GetReferenceKey(&dwFaceFontRefKey, &dwFaceFontRefKeySize));
+    HRB(dwFontFile->GetReferenceKey(&dwFontRefKey, &dwFontRefKeySize));
+    if (dwFaceFontRefKeySize != dwFontRefKeySize) {
+        return false;
+    }
+    if (0 != memcmp(dwFaceFontRefKey, dwFontRefKey, dwFontRefKeySize)) {
+        return false;
+    }
+
+    //TODO: better means than comparing name strings?
+    //NOTE: .tfc and fake bold/italic will end up here.
+    SkTScopedComPtr<IDWriteFontFamily> dwFaceFontFamily;
+    SkTScopedComPtr<IDWriteFontFamily> dwFontFamily;
+    HRB(dwFace->fDWriteFont->GetFontFamily(&dwFaceFontFamily));
+    HRB(dwFont->GetFontFamily(&dwFontFamily));
+
+    SkTScopedComPtr<IDWriteLocalizedStrings> dwFaceFontFamilyNames;
+    SkTScopedComPtr<IDWriteLocalizedStrings> dwFaceFontNames;
+    HRB(dwFaceFontFamily->GetFamilyNames(&dwFaceFontFamilyNames));
+    HRB(dwFace->fDWriteFont->GetFaceNames(&dwFaceFontNames));
+
+    SkTScopedComPtr<IDWriteLocalizedStrings> dwFontFamilyNames;
+    SkTScopedComPtr<IDWriteLocalizedStrings> dwFontNames;
+    HRB(dwFontFamily->GetFamilyNames(&dwFontFamilyNames));
+    HRB(dwFont->GetFaceNames(&dwFontNames));
+
+    UINT32 dwFaceFontFamilyNameLength;
+    UINT32 dwFaceFontNameLength;
+    HRB(dwFaceFontFamilyNames->GetStringLength(0, &dwFaceFontFamilyNameLength));
+    HRB(dwFaceFontNames->GetStringLength(0, &dwFaceFontNameLength));
+
+    UINT32 dwFontFamilyNameLength;
+    UINT32 dwFontNameLength;
+    HRB(dwFontFamilyNames->GetStringLength(0, &dwFontFamilyNameLength));
+    HRB(dwFontNames->GetStringLength(0, &dwFontNameLength));
+
+    if (dwFaceFontFamilyNameLength != dwFontFamilyNameLength ||
+        dwFaceFontNameLength != dwFontNameLength)
+    {
+        return false;
+    }
+
+    SkSMallocWCHAR dwFaceFontFamilyNameChar(dwFaceFontFamilyNameLength+1);
+    SkSMallocWCHAR dwFaceFontNameChar(dwFaceFontNameLength+1);
+    HRB(dwFaceFontFamilyNames->GetString(0, dwFaceFontFamilyNameChar.get(), dwFaceFontFamilyNameLength+1));
+    HRB(dwFaceFontNames->GetString(0, dwFaceFontNameChar.get(), dwFaceFontNameLength+1));
+
+    SkSMallocWCHAR dwFontFamilyNameChar(dwFontFamilyNameLength+1);
+    SkSMallocWCHAR dwFontNameChar(dwFontNameLength+1);
+    HRB(dwFontFamilyNames->GetString(0, dwFontFamilyNameChar.get(), dwFontFamilyNameLength+1));
+    HRB(dwFontNames->GetString(0, dwFontNameChar.get(), dwFontNameLength+1));
+
+    return wcscmp(dwFaceFontFamilyNameChar.get(), dwFontFamilyNameChar.get()) == 0 &&
+           wcscmp(dwFaceFontNameChar.get(), dwFontNameChar.get()) == 0;
+}
+
+SkTypeface* SkFontMgr_DirectWrite::createTypefaceFromDWriteFont(
+        IDWriteFontFace* fontFace,
+        IDWriteFont* font,
+        IDWriteFontFamily* fontFamily) const {
+    SkTypeface* face = FindByProcAndRef(FindByDWriteFont, font);
+    if (NULL == face) {
+        face = DWriteFontTypeface::Create(fFactory.get(), fontFace, font, fontFamily);
+        if (face) {
+            Add(face, get_style(font), true);
+        }
+    }
+    return face;
+}
+
+int SkFontMgr_DirectWrite::onCountFamilies() const {
+    return fFontCollection->GetFontFamilyCount();
+}
+
+void SkFontMgr_DirectWrite::onGetFamilyName(int index, SkString* familyName) const {
+    SkTScopedComPtr<IDWriteFontFamily> fontFamily;
+    HRVM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family.");
+
+    SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
+    HRVM(fontFamily->GetFamilyNames(&familyNames), "Could not get family names.");
+
+    sk_get_locale_string(familyNames.get(), fLocaleName.get(), familyName);
+}
+
+SkFontStyleSet* SkFontMgr_DirectWrite::onCreateStyleSet(int index) const {
+    SkTScopedComPtr<IDWriteFontFamily> fontFamily;
+    HRNM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family.");
+
+    return SkNEW_ARGS(SkFontStyleSet_DirectWrite, (this, fontFamily.get()));
+}
+
+SkFontStyleSet* SkFontMgr_DirectWrite::onMatchFamily(const char familyName[]) const {
+    SkSMallocWCHAR dwFamilyName;
+    HRN(sk_cstring_to_wchar(familyName, &dwFamilyName));
+
+    UINT32 index;
+    BOOL exists;
+    HRNM(fFontCollection->FindFamilyName(dwFamilyName.get(), &index, &exists),
+            "Failed while finding family by name.");
+    if (!exists) {
+        return NULL;
+    }
+
+    return this->onCreateStyleSet(index);
+}
+
+SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyle(const char familyName[],
+                                                      const SkFontStyle& fontstyle) const {
+    SkAutoTUnref<SkFontStyleSet> sset(this->matchFamily(familyName));
+    return sset->matchStyle(fontstyle);
+}
+
+SkTypeface* SkFontMgr_DirectWrite::onMatchFaceStyle(const SkTypeface* familyMember,
+                                                    const SkFontStyle& fontstyle) const {
+    SkString familyName;
+    SkFontStyleSet_DirectWrite sset(
+        this, ((DWriteFontTypeface*)familyMember)->fDWriteFontFamily.get()
+    );
+    return sset.matchStyle(fontstyle);
+}
+
+template <typename T> class SkAutoIDWriteUnregister {
+public:
+    SkAutoIDWriteUnregister(IDWriteFactory* factory, T* unregister)
+        : fFactory(factory), fUnregister(unregister)
+    { }
+
+    ~SkAutoIDWriteUnregister() {
+        if (fUnregister) {
+            unregister(fFactory, fUnregister);
+        }
+    }
+
+    T* detatch() {
+        T* old = fUnregister;
+        fUnregister = NULL;
+        return old;
+    }
+
+private:
+    HRESULT unregister(IDWriteFactory* factory, IDWriteFontFileLoader* unregister) {
+        return factory->UnregisterFontFileLoader(unregister);
+    }
+
+    HRESULT unregister(IDWriteFactory* factory, IDWriteFontCollectionLoader* unregister) {
+        return factory->UnregisterFontCollectionLoader(unregister);
+    }
+
+    IDWriteFactory* fFactory;
+    T* fUnregister;
+};
+
+SkTypeface* SkFontMgr_DirectWrite::onCreateFromStream(SkStream* stream, int ttcIndex) const {
+    SkTScopedComPtr<StreamFontFileLoader> fontFileLoader;
+    HRN(StreamFontFileLoader::Create(stream, &fontFileLoader));
+    HRN(fFactory->RegisterFontFileLoader(fontFileLoader.get()));
+    SkAutoIDWriteUnregister<StreamFontFileLoader> autoUnregisterFontFileLoader(
+        fFactory.get(), fontFileLoader.get());
+
+    SkTScopedComPtr<StreamFontCollectionLoader> fontCollectionLoader;
+    HRN(StreamFontCollectionLoader::Create(fontFileLoader.get(), &fontCollectionLoader));
+    HRN(fFactory->RegisterFontCollectionLoader(fontCollectionLoader.get()));
+    SkAutoIDWriteUnregister<StreamFontCollectionLoader> autoUnregisterFontCollectionLoader(
+        fFactory.get(), fontCollectionLoader.get());
+
+    SkTScopedComPtr<IDWriteFontCollection> fontCollection;
+    HRN(fFactory->CreateCustomFontCollection(fontCollectionLoader.get(), NULL, 0, &fontCollection));
+
+    // Find the first non-simulated font which has the given ttc index.
+    UINT32 familyCount = fontCollection->GetFontFamilyCount();
+    for (UINT32 familyIndex = 0; familyIndex < familyCount; ++familyIndex) {
+        SkTScopedComPtr<IDWriteFontFamily> fontFamily;
+        HRN(fontCollection->GetFontFamily(familyIndex, &fontFamily));
+
+        UINT32 fontCount = fontFamily->GetFontCount();
+        for (UINT32 fontIndex = 0; fontIndex < fontCount; ++fontIndex) {
+            SkTScopedComPtr<IDWriteFont> font;
+            HRN(fontFamily->GetFont(fontIndex, &font));
+            if (font->GetSimulations() != DWRITE_FONT_SIMULATIONS_NONE) {
+                continue;
+            }
+
+            SkTScopedComPtr<IDWriteFontFace> fontFace;
+            HRN(font->CreateFontFace(&fontFace));
+
+            UINT32 faceIndex = fontFace->GetIndex();
+            if (faceIndex == ttcIndex) {
+                return DWriteFontTypeface::Create(fFactory.get(),
+                                                  fontFace.get(), font.get(), fontFamily.get(),
+                                                  autoUnregisterFontFileLoader.detatch(),
+                                                  autoUnregisterFontCollectionLoader.detatch());
+            }
+        }
+    }
+
+    return NULL;
+}
+
+SkTypeface* SkFontMgr_DirectWrite::onCreateFromData(SkData* data, int ttcIndex) const {
+    SkAutoTUnref<SkStream> stream(SkNEW_ARGS(SkMemoryStream, (data)));
+    return this->createFromStream(stream, ttcIndex);
+}
+
+SkTypeface* SkFontMgr_DirectWrite::onCreateFromFile(const char path[], int ttcIndex) const {
+    SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
+    return this->createFromStream(stream, ttcIndex);
+}
+
+HRESULT SkFontMgr_DirectWrite::getByFamilyName(const WCHAR wideFamilyName[],
+                                               IDWriteFontFamily** fontFamily) const {
+    UINT32 index;
+    BOOL exists;
+    HR(fFontCollection->FindFamilyName(wideFamilyName, &index, &exists));
+
+    if (exists) {
+        HR(fFontCollection->GetFontFamily(index, fontFamily));
+    }
+    return S_OK;
+}
+
+HRESULT SkFontMgr_DirectWrite::getDefaultFontFamily(IDWriteFontFamily** fontFamily) const {
+    NONCLIENTMETRICSW metrics;
+    metrics.cbSize = sizeof(metrics);
+    if (0 == SystemParametersInfoW(SPI_GETNONCLIENTMETRICS,
+                                   sizeof(metrics),
+                                   &metrics,
+                                   0)) {
+        return E_UNEXPECTED;
+    }
+    HRM(this->getByFamilyName(metrics.lfMessageFont.lfFaceName, fontFamily),
+        "Could not create DWrite font family from LOGFONT.");
+    return S_OK;
+}
+
+SkTypeface* SkFontMgr_DirectWrite::onLegacyCreateTypeface(const char familyName[],
+                                                          unsigned styleBits) const {
+    SkTScopedComPtr<IDWriteFontFamily> fontFamily;
+    if (familyName) {
+        SkSMallocWCHAR wideFamilyName;
+        if (SUCCEEDED(sk_cstring_to_wchar(familyName, &wideFamilyName))) {
+            this->getByFamilyName(wideFamilyName, &fontFamily);
+        }
+    }
+
+    if (NULL == fontFamily.get()) {
+        // No family with given name, try default.
+        HRNM(this->getDefaultFontFamily(&fontFamily), "Could not get default font family.");
+    }
+
+    if (NULL == fontFamily.get()) {
+        // Could not obtain the default font.
+        HRNM(fFontCollection->GetFontFamily(0, &fontFamily),
+             "Could not get default-default font family.");
+    }
+
+    SkTScopedComPtr<IDWriteFont> font;
+    DWRITE_FONT_WEIGHT weight = (styleBits & SkTypeface::kBold)
+                              ? DWRITE_FONT_WEIGHT_BOLD
+                              : DWRITE_FONT_WEIGHT_NORMAL;
+    DWRITE_FONT_STRETCH stretch = DWRITE_FONT_STRETCH_NORMAL;
+    DWRITE_FONT_STYLE italic = (styleBits & SkTypeface::kItalic)
+                             ? DWRITE_FONT_STYLE_ITALIC
+                             : DWRITE_FONT_STYLE_NORMAL;
+    HRNM(fontFamily->GetFirstMatchingFont(weight, stretch, italic, &font),
+         "Could not get matching font.");
+
+    SkTScopedComPtr<IDWriteFontFace> fontFace;
+    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
+
+    return this->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fontFamily.get());
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+int SkFontStyleSet_DirectWrite::count() {
+    return fFontFamily->GetFontCount();
+}
+
+SkTypeface* SkFontStyleSet_DirectWrite::createTypeface(int index) {
+    SkTScopedComPtr<IDWriteFont> font;
+    HRNM(fFontFamily->GetFont(index, &font), "Could not get font.");
+
+    SkTScopedComPtr<IDWriteFontFace> fontFace;
+    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
+
+    return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(), fFontFamily.get());
+}
+
+void SkFontStyleSet_DirectWrite::getStyle(int index, SkFontStyle* fs, SkString* styleName) {
+    SkTScopedComPtr<IDWriteFont> font;
+    HRVM(fFontFamily->GetFont(index, &font), "Could not get font.");
+
+    if (fs) {
+        SkFontStyle::Slant slant;
+        switch (font->GetStyle()) {
+        case DWRITE_FONT_STYLE_NORMAL:
+            slant = SkFontStyle::kUpright_Slant;
+            break;
+        case DWRITE_FONT_STYLE_OBLIQUE:
+        case DWRITE_FONT_STYLE_ITALIC:
+            slant = SkFontStyle::kItalic_Slant;
+            break;
+        default:
+            SkASSERT(false);
+        }
+
+        int weight = font->GetWeight();
+        int width = font->GetStretch();
+
+        *fs = SkFontStyle(weight, width, slant);
+    }
+
+    if (styleName) {
+        SkTScopedComPtr<IDWriteLocalizedStrings> faceNames;
+        if (SUCCEEDED(font->GetFaceNames(&faceNames))) {
+            sk_get_locale_string(faceNames.get(), fFontMgr->fLocaleName.get(), styleName);
+        }
+    }
+}
+
+SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) {
+    DWRITE_FONT_STYLE slant;
+    switch (pattern.slant()) {
+    case SkFontStyle::kUpright_Slant:
+        slant = DWRITE_FONT_STYLE_NORMAL;
+        break;
+    case SkFontStyle::kItalic_Slant:
+        slant = DWRITE_FONT_STYLE_ITALIC;
+        break;
+    default:
+        SkASSERT(false);
+    }
+
+    DWRITE_FONT_WEIGHT weight = (DWRITE_FONT_WEIGHT)pattern.weight();
+    DWRITE_FONT_STRETCH width = (DWRITE_FONT_STRETCH)pattern.width();
+
+    SkTScopedComPtr<IDWriteFont> font;
+    // TODO: perhaps use GetMatchingFonts and get the least simulated?
+    HRNM(fFontFamily->GetFirstMatchingFont(weight, width, slant, &font),
+         "Could not match font in family.");
+
+    SkTScopedComPtr<IDWriteFontFace> fontFace;
+    HRNM(font->CreateFontFace(&fontFace), "Could not create font face.");
+
+    return fFontMgr->createTypefaceFromDWriteFont(fontFace.get(), font.get(),
+                                                  fFontFamily.get());
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory) {
+    if (NULL == factory) {
+        factory = sk_get_dwrite_factory();
+        if (NULL == factory) {
+            return NULL;
+        }
+    }
+
+    SkTScopedComPtr<IDWriteFontCollection> sysFontCollection;
+    HRNM(factory->GetSystemFontCollection(&sysFontCollection, FALSE),
+         "Could not get system font collection.");
+
+    WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH];
+    WCHAR* localeName = NULL;
+    int localeNameLen = 0;
+
+    // Dynamically load GetUserDefaultLocaleName function, as it is not available on XP.
+    SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = NULL;
+    HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc);
+    if (NULL == getUserDefaultLocaleNameProc) {
+        SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName.");
+    } else {
+        localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH);
+        if (localeNameLen) {
+            localeName = localeNameStorage;
+        };
+    }
+
+    return SkNEW_ARGS(SkFontMgr_DirectWrite, (factory, sysFontCollection.get(),
+                                              localeName, localeNameLen));
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+#include "SkFontMgr_indirect.h"
+#include "SkTypeface_win.h"
+SkFontMgr* SkFontMgr_New_DirectWriteRenderer(SkRemotableFontMgr* proxy) {
+    SkAutoTUnref<SkFontMgr> impl(SkFontMgr_New_DirectWrite());
+    if (impl.get() == NULL) {
+        return NULL;
+    }
+    return SkNEW_ARGS(SkFontMgr_Indirect, (impl.get(), proxy));
+}