C++ SkTScopedComPtr::release方法代码示例

    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;
    }

HRESULT StreamFontFileLoader::CreateStreamFromKey(
    void const* fontFileReferenceKey,
    UINT32 fontFileReferenceKeySize,
    IDWriteFontFileStream** fontFileStream)
{
    SkTScopedComPtr<SkDWriteFontFileStreamWrapper> stream;
    HR(SkDWriteFontFileStreamWrapper::Create(fStream->duplicate(), &stream));
    *fontFileStream = stream.release();
    return S_OK;
}

SkTypeface::LocalizedStrings* DWriteFontTypeface::onCreateFamilyNameIterator() const {
    SkTypeface::LocalizedStrings* nameIter =
        SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this);
    if (nullptr == nameIter) {
        SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
        HRNM(fDWriteFontFamily->GetFamilyNames(&familyNames), "Could not obtain family names.");
        nameIter = new LocalizedStrings_IDWriteLocalizedStrings(familyNames.release());
    }
    return nameIter;
}

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;
}

//.........这里部分代码省略.........
    if (FAILED(hr)) {
        return nullptr;
    }

    // Create an IStream.
    SkTScopedComPtr<IStream> iStream;
    // Note that iStream will take ownership of the new memory stream because
    // we set |deleteOnRelease| to true.
    hr = SkIStream::CreateFromSkStream(new SkMemoryStream(data), true, &iStream);
    if (FAILED(hr)) {
        return nullptr;
    }

    // Create the decoder from the stream.
    SkTScopedComPtr<IWICBitmapDecoder> decoder;
    hr = imagingFactory->CreateDecoderFromStream(iStream.get(), nullptr,
            WICDecodeMetadataCacheOnDemand, &decoder);
    if (FAILED(hr)) {
        return nullptr;
    }

    // Select the first frame from the decoder.
    SkTScopedComPtr<IWICBitmapFrameDecode> imageFrame;
    hr = decoder->GetFrame(0, &imageFrame);
    if (FAILED(hr)) {
        return nullptr;
    }

    // Treat the frame as an image source.
    SkTScopedComPtr<IWICBitmapSource> imageSource;
    hr = imageFrame->QueryInterface(IID_PPV_ARGS(&imageSource));
    if (FAILED(hr)) {
        return nullptr;
    }

    // Get the size of the image.
    UINT width;
    UINT height;
    hr = imageSource->GetSize(&width, &height);
    if (FAILED(hr)) {
        return nullptr;
    }

    // Get the encoded pixel format.
    WICPixelFormatGUID format;
    hr = imageSource->GetPixelFormat(&format);
    if (FAILED(hr)) {
        return nullptr;
    }

    // Recommend kOpaque if the image is opaque and kPremul otherwise.
    // FIXME: We are stuck recommending kPremul for all indexed formats
    //        (Ex: GUID_WICPixelFormat8bppIndexed) because we don't have
    //        a way to check if the image has alpha.
    SkAlphaType alphaType = kPremul_SkAlphaType;

    if (GUID_WICPixelFormat16bppBGR555 == format ||
        GUID_WICPixelFormat16bppBGR565 == format ||
        GUID_WICPixelFormat32bppBGR101010 == format ||
        GUID_WICPixelFormatBlackWhite == format ||
        GUID_WICPixelFormat2bppGray == format ||
        GUID_WICPixelFormat4bppGray == format ||
        GUID_WICPixelFormat8bppGray == format ||
        GUID_WICPixelFormat16bppGray == format ||
        GUID_WICPixelFormat16bppGrayFixedPoint == format ||
        GUID_WICPixelFormat16bppGrayHalf == format ||
        GUID_WICPixelFormat32bppGrayFloat == format ||
        GUID_WICPixelFormat32bppGrayFixedPoint == format ||
        GUID_WICPixelFormat32bppRGBE == format ||
        GUID_WICPixelFormat24bppRGB == format ||
        GUID_WICPixelFormat24bppBGR == format ||
        GUID_WICPixelFormat32bppBGR == format ||
        GUID_WICPixelFormat48bppRGB == format ||
        GUID_WICPixelFormat48bppBGR == format ||
        GUID_WICPixelFormat48bppRGBFixedPoint == format ||
        GUID_WICPixelFormat48bppBGRFixedPoint == format ||
        GUID_WICPixelFormat48bppRGBHalf == format ||
        GUID_WICPixelFormat64bppRGBFixedPoint == format ||
        GUID_WICPixelFormat64bppRGBHalf == format ||
        GUID_WICPixelFormat96bppRGBFixedPoint == format ||
        GUID_WICPixelFormat128bppRGBFloat == format ||
        GUID_WICPixelFormat128bppRGBFixedPoint == format ||
        GUID_WICPixelFormat32bppRGB == format ||
        GUID_WICPixelFormat64bppRGB == format ||
        GUID_WICPixelFormat96bppRGBFloat == format ||
        GUID_WICPixelFormat32bppCMYK == format ||
        GUID_WICPixelFormat64bppCMYK == format ||
        GUID_WICPixelFormat8bppY == format ||
        GUID_WICPixelFormat8bppCb == format ||
        GUID_WICPixelFormat8bppCr == format ||
        GUID_WICPixelFormat16bppCbCr == format)
    {
        alphaType = kOpaque_SkAlphaType;
    }

    // FIXME: If we change the implementation to handle swizzling ourselves,
    //        we can support more output formats.
    SkImageInfo info = SkImageInfo::MakeN32(width, height, alphaType);
    return new SkImageGeneratorWIC(info, imagingFactory.release(), imageSource.release(), data);
}