C++ SkTScopedComPtr::get方法代码示例

    // IDWriteTextRenderer methods
    virtual HRESULT STDMETHODCALLTYPE DrawGlyphRun(
        void* clientDrawingContext,
        FLOAT baselineOriginX,
        FLOAT baselineOriginY,
        DWRITE_MEASURING_MODE measuringMode,
        DWRITE_GLYPH_RUN const* glyphRun,
        DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription,
        IUnknown* clientDrawingEffect) override
    {
        SkTScopedComPtr<IDWriteFont> font;
        HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font),
            "Could not get font from font face.");

        // It is possible that the font passed does not actually have the requested character,
        // due to no font being found and getting the fallback font.
        // Check that the font actually contains the requested character.
        BOOL exists;
        HRM(font->HasCharacter(fCharacter, &exists), "Could not find character.");

        if (exists) {
            SkTScopedComPtr<IDWriteFontFamily> fontFamily;
            HRM(font->GetFontFamily(&fontFamily), "Could not get family.");
            fResolvedTypeface = fOuter->createTypefaceFromDWriteFont(glyphRun->fontFace,
                                                                     font.get(),
                                                                     fontFamily.get());
        }

        return S_OK;
    }

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());
}

SkTypeface* SkFontMgr_DirectWrite::onLegacyCreateTypeface(const char familyName[],
                                                          SkFontStyle style) const {
    SkTScopedComPtr<IDWriteFontFamily> fontFamily;
    if (familyName) {
        SkSMallocWCHAR wideFamilyName;
        if (SUCCEEDED(sk_cstring_to_wchar(familyName, &wideFamilyName))) {
            this->getByFamilyName(wideFamilyName, &fontFamily);
        }
    }

    if (nullptr == fontFamily.get()) {
        // No family with given name, try default.
        this->getDefaultFontFamily(&fontFamily);
    }

    if (nullptr == fontFamily.get()) {
        // Could not obtain the default font.
        HRNM(fFontCollection->GetFontFamily(0, &fontFamily),
             "Could not get default-default font family.");
    }

    SkTScopedComPtr<IDWriteFont> font;
    DWriteStyle dwStyle(style);
    HRNM(fontFamily->GetFirstMatchingFont(dwStyle.fWeight, dwStyle.fWidth, dwStyle.fSlant, &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());
}

HRESULT StreamFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile) {
    if (fCurrentFile.get() == nullptr) {
        *fontFile = nullptr;
        return E_FAIL;
    }

    *fontFile = SkRefComPtr(fCurrentFile.get());
    return  S_OK;
}

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());
}

static HRESULT are_same(IUnknown* a, IUnknown* b, bool& same) {
    SkTScopedComPtr<IUnknown> iunkA;
    HRM(a->QueryInterface(&iunkA), "Failed to QI<IUnknown> for a.");

    SkTScopedComPtr<IUnknown> iunkB;
    HRM(b->QueryInterface(&iunkB), "Failed to QI<IUnknown> for b.");

    same = (iunkA.get() == iunkB.get());
    return S_OK;
}

SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) {
    SkTScopedComPtr<IDWriteFont> font;
    DWriteStyle dwStyle(pattern);
    // TODO: perhaps use GetMatchingFonts and get the least simulated?
    HRNM(fFontFamily->GetFirstMatchingFont(dwStyle.fWeight, dwStyle.fWidth, dwStyle.fSlant, &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());
}

void SkFontStyleSet_DirectWrite::getStyle(int index, SkFontStyle* fs, SkString* styleName) {
    SkTScopedComPtr<IDWriteFont> font;
    HRVM(fFontFamily->GetFont(index, &font), "Could not get font.");

    if (fs) {
        *fs = get_style(font.get());
    }

    if (styleName) {
        SkTScopedComPtr<IDWriteLocalizedStrings> faceNames;
        if (SUCCEEDED(font->GetFaceNames(&faceNames))) {
            sk_get_locale_string(faceNames.get(), fFontMgr->fLocaleName.get(), styleName);
        }
    }
}

    int FindOrAdd(IDWriteFontFileLoader* fontFileLoader,
                  const void* refKey, UINT32 refKeySize) const
    {
        SkTScopedComPtr<IUnknown> fontFileLoaderId;
        HR_GENERAL(fontFileLoader->QueryInterface(&fontFileLoaderId),
                   "Failed to re-convert to IDWriteFontFileLoader.",
                   SkFontIdentity::kInvalidDataId);

        SkAutoMutexAcquire ama(fDataIdCacheMutex);
        int count = fDataIdCache.count();
        int i;
        for (i = 0; i < count; ++i) {
            const DataId& current = fDataIdCache[i];
            if (fontFileLoaderId.get() == current.fLoader &&
                refKeySize == current.fKeySize &&
                0 == memcmp(refKey, current.fKey, refKeySize))
            {
                return i;
            }
        }
        DataId& added = fDataIdCache.push_back();
        added.fLoader = fontFileLoaderId.release();  // Ref is passed.
        added.fKey = sk_malloc_throw(refKeySize);
        memcpy(added.fKey, refKey, refKeySize);
        added.fKeySize = refKeySize;

        return i;
    }

SK_API SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory) {
    if (NULL == factory) {
        factory = sk_get_dwrite_factory();
        if (NULL == factory) {
            return NULL;
        }
    }

    SkTScopedComPtr<IDWriteFontCollection> sysFontCollection;
    HRNM(SkFontMgr_GetFontCollectionToUse(&sysFontCollection, factory),
         "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));
}

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);
        }
    }
}

SkStreamAsset* DWriteFontTypeface::onOpenStream(int* ttcIndex) const {
    *ttcIndex = fDWriteFontFace->GetIndex();

    UINT32 numFiles;
    HRNM(fDWriteFontFace->GetFiles(&numFiles, nullptr),
         "Could not get number of font files.");
    if (numFiles != 1) {
        return nullptr;
    }

    SkTScopedComPtr<IDWriteFontFile> fontFile;
    HRNM(fDWriteFontFace->GetFiles(&numFiles, &fontFile), "Could not get font files.");

    const void* fontFileKey;
    UINT32 fontFileKeySize;
    HRNM(fontFile->GetReferenceKey(&fontFileKey, &fontFileKeySize),
         "Could not get font file reference key.");

    SkTScopedComPtr<IDWriteFontFileLoader> fontFileLoader;
    HRNM(fontFile->GetLoader(&fontFileLoader), "Could not get font file loader.");

    SkTScopedComPtr<IDWriteFontFileStream> fontFileStream;
    HRNM(fontFileLoader->CreateStreamFromKey(fontFileKey, fontFileKeySize,
                                             &fontFileStream),
         "Could not create font file stream.");

    return new SkDWriteFontFileStream(fontFileStream.get());
}

SK_API SkFontMgr* SkFontMgr_New_DirectWrite(IDWriteFactory* factory,
                                            IDWriteFontCollection* collection,
                                            IDWriteFontFallback* fallback) {
    if (nullptr == factory) {
        factory = sk_get_dwrite_factory();
        if (nullptr == factory) {
            return nullptr;
        }
    }

    SkTScopedComPtr<IDWriteFontCollection> systemFontCollection;
    if (nullptr == collection) {
        HRNM(factory->GetSystemFontCollection(&systemFontCollection, FALSE),
             "Could not get system font collection.");
        collection = systemFontCollection.get();
    }

    WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH];
    WCHAR* localeName = nullptr;
    int localeNameLen = 0;

    // Dynamically load GetUserDefaultLocaleName function, as it is not available on XP.
    SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = nullptr;
    HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc);
    if (nullptr == getUserDefaultLocaleNameProc) {
        SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName.");
    } else {
        localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH);
        if (localeNameLen) {
            localeName = localeNameStorage;
        };
    }

    return new SkFontMgr_DirectWrite(factory, collection, fallback, localeName, localeNameLen);
}

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);
}

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;
}