C++ SkTScopedComPtr::GetSize方法代码示例

bool SkImageDecoder_WIC::decodeStream(SkStream* stream, SkBitmap* bm, WICModes wicMode,
                                      Format* format) const {
    //Initialize COM.
    SkAutoCoInitialize scopedCo;
    if (!scopedCo.succeeded()) {
        return false;
    }

    HRESULT hr = S_OK;

    //Create Windows Imaging Component ImagingFactory.
    SkTScopedComPtr<IWICImagingFactory> piImagingFactory;
    if (SUCCEEDED(hr)) {
        hr = CoCreateInstance(
            CLSID_WICImagingFactory
            , nullptr
            , CLSCTX_INPROC_SERVER
            , IID_PPV_ARGS(&piImagingFactory)
        );
    }

    //Convert SkStream to IStream.
    SkTScopedComPtr<IStream> piStream;
    if (SUCCEEDED(hr)) {
        hr = SkIStream::CreateFromSkStream(stream, false, &piStream);
    }

    //Make sure we're at the beginning of the stream.
    if (SUCCEEDED(hr)) {
        LARGE_INTEGER liBeginning = { 0 };
        hr = piStream->Seek(liBeginning, STREAM_SEEK_SET, nullptr);
    }

    //Create the decoder from the stream content.
    SkTScopedComPtr<IWICBitmapDecoder> piBitmapDecoder;
    if (SUCCEEDED(hr)) {
        hr = piImagingFactory->CreateDecoderFromStream(
            piStream.get()                    //Image to be decoded
            , nullptr                            //No particular vendor
            , WICDecodeMetadataCacheOnDemand  //Cache metadata when needed
            , &piBitmapDecoder                //Pointer to the decoder
        );
    }

    if (kDecodeFormat_WICMode == wicMode) {
        SkASSERT(format != nullptr);
        //Get the format
        if (SUCCEEDED(hr)) {
            GUID guidFormat;
            hr = piBitmapDecoder->GetContainerFormat(&guidFormat);
            if (SUCCEEDED(hr)) {
                *format = GuidContainerFormat_to_Format(guidFormat);
                return true;
            }
        }
        return false;
    }

    //Get the first frame from the decoder.
    SkTScopedComPtr<IWICBitmapFrameDecode> piBitmapFrameDecode;
    if (SUCCEEDED(hr)) {
        hr = piBitmapDecoder->GetFrame(0, &piBitmapFrameDecode);
    }

    //Get the BitmapSource interface of the frame.
    SkTScopedComPtr<IWICBitmapSource> piBitmapSourceOriginal;
    if (SUCCEEDED(hr)) {
        hr = piBitmapFrameDecode->QueryInterface(
            IID_PPV_ARGS(&piBitmapSourceOriginal)
        );
    }

    //Get the size of the bitmap.
    UINT width;
    UINT height;
    if (SUCCEEDED(hr)) {
        hr = piBitmapSourceOriginal->GetSize(&width, &height);
    }

    //Exit early if we're only looking for the bitmap bounds.
    if (SUCCEEDED(hr)) {
        bm->setInfo(SkImageInfo::MakeN32Premul(width, height));
        if (kDecodeBounds_WICMode == wicMode) {
            return true;
        }
        if (!this->allocPixelRef(bm, nullptr)) {
            return false;
        }
    }

    //Create a format converter.
    SkTScopedComPtr<IWICFormatConverter> piFormatConverter;
    if (SUCCEEDED(hr)) {
        hr = piImagingFactory->CreateFormatConverter(&piFormatConverter);
    }

    GUID destinationPixelFormat;
    if (this->getRequireUnpremultipliedColors()) {
        destinationPixelFormat = GUID_WICPixelFormat32bppBGRA;
    } else {
//.........这里部分代码省略.........

bool SkImageDecoder_WIC::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
    //Initialize COM.
    AutoCoInitialize scopedCo;
    HRESULT hr = scopedCo.getHR();
    
    //Create Windows Imaging Component ImagingFactory.
    SkTScopedComPtr<IWICImagingFactory> piImagingFactory;
    if (SUCCEEDED(hr)) {
        hr = CoCreateInstance(
            CLSID_WICImagingFactory
            , NULL
            , CLSCTX_INPROC_SERVER
            , IID_PPV_ARGS(&piImagingFactory)
        );
    }
    
    //Convert SkStream to IStream.
    SkTScopedComPtr<IStream> piStream;
    if (SUCCEEDED(hr)) {
        hr = SkIStream::CreateFromSkStream(stream, false, &piStream);
    }
    
    //Make sure we're at the beginning of the stream.
    if (SUCCEEDED(hr)) {
        LARGE_INTEGER liBeginning = { 0 };
        hr = piStream->Seek(liBeginning, STREAM_SEEK_SET, NULL);
    }
    
    //Create the decoder from the stream content.
    SkTScopedComPtr<IWICBitmapDecoder> piBitmapDecoder;
    if (SUCCEEDED(hr)) {
        hr = piImagingFactory->CreateDecoderFromStream(
            piStream.get()                    //Image to be decoded
            , NULL                            //No particular vendor
            , WICDecodeMetadataCacheOnDemand  //Cache metadata when needed
            , &piBitmapDecoder                //Pointer to the decoder
        );
    }
    
    //Get the first frame from the decoder.
    SkTScopedComPtr<IWICBitmapFrameDecode> piBitmapFrameDecode;
    if (SUCCEEDED(hr)) {
        hr = piBitmapDecoder->GetFrame(0, &piBitmapFrameDecode);
    }
    
    //Get the BitmapSource interface of the frame.
    SkTScopedComPtr<IWICBitmapSource> piBitmapSourceOriginal;
    if (SUCCEEDED(hr)) {
        hr = piBitmapFrameDecode->QueryInterface(
            IID_PPV_ARGS(&piBitmapSourceOriginal)
        );
    }
    
    //Get the size of the bitmap.
    UINT width;
    UINT height;
    if (SUCCEEDED(hr)) {
        hr = piBitmapSourceOriginal->GetSize(&width, &height);
    }
    
    //Exit early if we're only looking for the bitmap bounds.
    if (SUCCEEDED(hr)) {
        bm->setConfig(SkBitmap::kARGB_8888_Config, width, height);
        if (SkImageDecoder::kDecodeBounds_Mode == mode) {
            return true;
        }
        if (!this->allocPixelRef(bm, NULL)) {
            return false;
        }
    }
    
    //Create a format converter.
    SkTScopedComPtr<IWICFormatConverter> piFormatConverter;
    if (SUCCEEDED(hr)) {
        hr = piImagingFactory->CreateFormatConverter(&piFormatConverter);
    }
    
    if (SUCCEEDED(hr)) {
        hr = piFormatConverter->Initialize(
            piBitmapSourceOriginal.get()      //Input bitmap to convert
            , GUID_WICPixelFormat32bppPBGRA   //Destination pixel format
            , WICBitmapDitherTypeNone         //Specified dither patterm
            , NULL                            //Specify a particular palette
            , 0.f                             //Alpha threshold
            , WICBitmapPaletteTypeCustom      //Palette translation type
        );
    }
    
    //Get the BitmapSource interface of the format converter.
    SkTScopedComPtr<IWICBitmapSource> piBitmapSourceConverted;
    if (SUCCEEDED(hr)) {
        hr = piFormatConverter->QueryInterface(
            IID_PPV_ARGS(&piBitmapSourceConverted)
        );
    }
    
    //Copy the pixels into the bitmap.
    if (SUCCEEDED(hr)) {
        bm->lockPixels();
        bm->eraseColor(0);
//.........这里部分代码省略.........

SkImageGenerator* SkImageGeneratorWIC::NewFromEncodedWIC(SkData* data) {
    // Create Windows Imaging Component ImagingFactory.
    SkTScopedComPtr<IWICImagingFactory> imagingFactory;
    HRESULT hr = CoCreateInstance(CLSID_WICImagingFactory, nullptr, CLSCTX_INPROC_SERVER,
            IID_PPV_ARGS(&imagingFactory));
    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;
    }

//.........这里部分代码省略.........