void DocumentLoader::substituteResourceDeliveryTimerFired(Timer<DocumentLoader>*)
{
    if (m_pendingSubstituteResources.isEmpty())
        return;
    ASSERT(m_frame && m_frame->page());
    if (m_frame->page()->defersLoading())
        return;

    SubstituteResourceMap copy;
    copy.swap(m_pendingSubstituteResources);

    SubstituteResourceMap::const_iterator end = copy.end();
    for (SubstituteResourceMap::const_iterator it = copy.begin(); it != end; ++it) {
        RefPtr<ResourceLoader> loader = it->first;
        SubstituteResource* resource = it->second.get();
        
        if (resource) {
            SharedBuffer* data = resource->data();
        
            loader->didReceiveResponse(resource->response());
            loader->didReceiveData(data->data(), data->size(), data->size(), true);
            loader->didFinishLoading();
        } else {
            // A null resource means that we should fail the load.
            // FIXME: Maybe we should use another error here - something like "not in cache".
            loader->didFail(loader->cannotShowURLError());
        }
    }
}
size_t getBytesWithOffset(void *info, void* buffer, size_t offset, size_t count)
{
    SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
    size_t availBytes = count;
    if (offset + count > sharedBuffer->size())
        availBytes -= (offset + count) - sharedBuffer->size();
    memcpy(buffer, sharedBuffer->data() + offset, availBytes);
    return availBytes;
}
Example #3
0
void TextTrackLoader::processNewCueData(CachedResource* resource)
{
    ASSERT(m_cachedCueData == resource);
    
    if (m_state == Failed || !resource->data())
        return;
    
    SharedBuffer* buffer = resource->data();
    if (m_parseOffset == buffer->size())
        return;

    const char* data;
    unsigned length;
    
    if (!m_cueParser) {
        if (resource->response().mimeType() == "text/vtt")
            m_cueParser = WebVTTParser::create(this, m_scriptExecutionContext);
        else {
            // Don't proceed until we have enough data to check for the WebVTT magic identifier.
            unsigned identifierLength = WebVTTParser::fileIdentifierMaximumLength();
            if (buffer->size() < identifierLength)
                return;
            
            Vector<char> identifier;
            unsigned offset = 0;
            while (offset < identifierLength && (length = buffer->getSomeData(data, offset))) {
                if (length > identifierLength)
                    length = identifierLength;
                identifier.append(data, length);
                offset += length;
            }
            
            if (!WebVTTParser::hasRequiredFileIdentifier(identifier.data(), identifier.size())) {
                LOG(Media, "TextTrackLoader::didReceiveData - file \"%s\" does not have WebVTT magic header", 
                    resource->response().url().string().utf8().data());
                m_state = Failed;
                m_cueLoadTimer.startOneShot(0);
                return;
            }
            
            m_cueParser = WebVTTParser::create(this, m_scriptExecutionContext);
        }
    }
    
    ASSERT(m_cueParser);
    
    while ((length = buffer->getSomeData(data, m_parseOffset))) {
        m_cueParser->parseBytes(data, length);
        m_parseOffset += length;
    }
    
}
Example #4
0
static bool canHandleImage(const SharedBuffer& _data)
{
    // We need at least 4 bytes to figure out what kind of image we're dealing with.
    if (_data.size() < 4)
        return false;

    QByteArray data = QByteArray::fromRawData(_data.data(), _data.size());
    QBuffer buffer(&data);
    if (!buffer.open(QBuffer::ReadOnly))
        return false;

    return !QImageReader::imageFormat(&buffer).isEmpty();
}
Example #5
0
bool InspectorPageAgent::cachedResourceContent(Resource* cachedResource, String* result, bool* base64Encoded)
{
    bool hasZeroSize;
    bool prepared = prepareResourceBuffer(cachedResource, &hasZeroSize);
    if (!prepared)
        return false;

    *base64Encoded = !hasTextContent(cachedResource);
    if (*base64Encoded) {
        RefPtr<SharedBuffer> buffer = hasZeroSize ? SharedBuffer::create() : cachedResource->resourceBuffer();

        if (!buffer)
            return false;

        *result = base64Encode(buffer->data(), buffer->size());
        return true;
    }

    if (hasZeroSize) {
        *result = "";
        return true;
    }

    if (cachedResource) {
        switch (cachedResource->type()) {
        case Resource::CSSStyleSheet:
            *result = toCSSStyleSheetResource(cachedResource)->sheetText(false);
            return true;
        case Resource::Script:
            *result = toScriptResource(cachedResource)->script();
            return true;
        case Resource::MainResource:
            return false;
        case Resource::Raw: {
            SharedBuffer* buffer = cachedResource->resourceBuffer();
            if (!buffer)
                return false;
            OwnPtr<TextResourceDecoder> decoder = createXHRTextDecoder(cachedResource->response().mimeType(), cachedResource->response().textEncodingName());
            String content = decoder->decode(buffer->data(), buffer->size());
            *result = content + decoder->flush();
            return true;
        }
        default:
            SharedBuffer* buffer = cachedResource->resourceBuffer();
            return decodeBuffer(buffer ? buffer->data() : 0, buffer ? buffer->size() : 0, cachedResource->response().textEncodingName(), result);
        }
    }
    return false;
}
SkData* ImageFrameGenerator::refEncodedData()
{
    // SkData is returned only when full image (encoded) data is received. This is important
    // since DeferredImageDecoder::setData is called only once with allDataReceived set to true,
    // and after that m_data->m_readBuffer.data() is not changed. See also RELEASE_ASSERT used in
    // ThreadSafeDataTransport::data().
    SharedBuffer* buffer = 0;
    bool allDataReceived = false;
    m_data->data(&buffer, &allDataReceived);
    if (!allDataReceived)
        return nullptr;

    {
        // Prevents concurrent access to m_encodedData creation.
        MutexLocker lock(m_decodeMutex);
        if (m_encodedData) {
            m_encodedData->ref();
            return m_encodedData;
        }
        // m_encodedData is created with initial reference count == 1. ImageFrameGenerator always holds one
        // reference to m_encodedData, as it prevents write access in SkData::writable_data.
        m_encodedData = SkData::NewWithProc(buffer->data(), buffer->size(), sharedSkDataReleaseCallback, m_data.get());
        // While m_encodedData is referenced, prevent disposing m_data and its content.
        // it is dereferenced in sharedSkDataReleaseCallback, called when m_encodedData gets dereferenced.
        m_data->ref();
    }
    // Increase the reference, caller must decrease it. One reference is always kept by ImageFrameGenerator and released
    // in destructor.
    m_encodedData->ref();
    return m_encodedData;
}
static void writeImageToDataObject(
    DataObjectJava* dataObject,
    Element* element,
    const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->image() || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->image()->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    dataObject->fileContent = imageBuffer;

    // Determine the filename for the file contents of the image.  We try to
    // use the alt tag if one exists, otherwise we fall back on the suggested
    // filename in the http header, and finally we resort to using the filename
    // in the URL.
    //String title = element->getAttribute(altAttr);
    //if (title.isEmpty())
    //  title = cachedImage->response().suggestedFilename();

    //TODO: do we need it?
    dataObject->fileContentFilename = cachedImage->response().suggestedFilename();
}
static void* ensureCapacity(void* data, size_t nmemb, size_t size)
{
    SharedBuffer* buf;
    size_t currentSize;

    if (data != NULL) {
        buf = SharedBuffer::bufferFromData(data);
        currentSize = buf->size();
    } else {
        buf = NULL;
        currentSize = 0;
    }

    size_t minSize = nmemb * size;
    if (minSize > currentSize) {
        unsigned int requestSize = roundUpPower2(minSize);
        if (buf == NULL) {
            buf = SharedBuffer::alloc(requestSize);
        } else {
            buf = buf->editResize(requestSize);
        }
        memset((unsigned char*)buf->data()+currentSize, 0, requestSize - currentSize);
    }

    return buf->data();
}
Example #9
0
void DeferredImageDecoder::setData(SharedBuffer& data, bool allDataReceived)
{
    if (m_actualDecoder) {
        const bool firstData = !m_data;
        const bool moreData = data.size() > m_lastDataSize;
        m_dataChanged = firstData || moreData;
        m_data = RefPtr<SharedBuffer>(data);
        m_lastDataSize = data.size();
        m_allDataReceived = allDataReceived;
        m_actualDecoder->setData(&data, allDataReceived);
        prepareLazyDecodedFrames();
    }

    if (m_frameGenerator)
        m_frameGenerator->setData(&data, allDataReceived);
}
Example #10
0
void DocLoader::checkCacheObjectStatus(CachedResource* resource)
{
    // Return from the function for objects that we didn't load from the cache.
    if (!resource)
        return;
    switch (resource->status()) {
        case CachedResource::Cached:
            break;
        case CachedResource::NotCached:
        case CachedResource::Unknown:
        case CachedResource::New:
        case CachedResource::Pending:
            return;
    }
    
    // Notify the caller that we "loaded".
    if (!m_frame || m_frame->loader()->haveToldBridgeAboutLoad(resource->url()))
        return;
    
    ResourceRequest request(resource->url());
    const ResourceResponse& response = resource->response();
    SharedBuffer* data = resource->data();
    
    if (resource->sendResourceLoadCallbacks()) {
        // FIXME: If the WebKit client changes or cancels the request, WebCore does not respect this and continues the load.
        m_frame->loader()->loadedResourceFromMemoryCache(request, response, data ? data->size() : 0);
    }
    m_frame->loader()->didTellBridgeAboutLoad(resource->url());
}
size_t EOTStream::read(void* buffer, size_t count)
{
    size_t bytesToRead = count;
    if (m_inHeader) {
        size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count);
        memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader);
        m_offset += bytesFromHeader;
        bytesToRead -= bytesFromHeader;
        if (m_offset == m_eotHeader.size()) {
            m_inHeader = false;
            m_offset = 0;
        }
    }
    if (bytesToRead && !m_inHeader) {
        size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead);
        memcpy(buffer, m_fontData->data() + m_offset, bytesFromData);
        if (m_offset < m_overlayDst + m_overlayLength && m_offset + bytesFromData >= m_overlayDst) {
            size_t dstOffset = max<int>(m_overlayDst - m_offset, 0);
            size_t srcOffset = max<int>(0, m_offset - m_overlayDst);
            size_t bytesToCopy = min(bytesFromData - dstOffset, m_overlayLength - srcOffset);
            memcpy(reinterpret_cast<char*>(buffer) + dstOffset, m_fontData->data() + m_overlaySrc + srcOffset, bytesToCopy);
        }
        m_offset += bytesFromData;
        bytesToRead -= bytesFromData;
    }
    return count - bytesToRead;
}
static void writeImageToDataObject(ChromiumDataObject* dataObject, Element* element,
                                   const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->image() || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->image()->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    dataObject->fileContent = imageBuffer;

    // Determine the filename for the file contents of the image.  We try to
    // use the alt tag if one exists, otherwise we fall back on the suggested
    // filename in the http header, and finally we resort to using the filename
    // in the URL.
    String extension(".");
    extension += MIMETypeRegistry::getPreferredExtensionForMIMEType(
        cachedImage->response().mimeType());
    String title = element->getAttribute(altAttr);
    if (title.isEmpty()) {
        title = cachedImage->response().suggestedFilename();
        // FIXME: If title is empty, get the filename from the URL.
    }
    dataObject->fileContentFilename = title + extension;
}
Example #13
0
static void writeImageToDataObject(IDataObject* dataObject, Element* element, const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->image() || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->image()->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    HGLOBAL imageFileDescriptor = createGlobalImageFileDescriptor(url.string(), element->getAttribute(altAttr), cachedImage);
    if (!imageFileDescriptor)
        return;

    HGLOBAL imageFileContent = createGlobalImageFileContent(imageBuffer);
    if (!imageFileContent) {
        GlobalFree(imageFileDescriptor);
        return;
    }

    String fileName = cachedImage->response().suggestedFilename();
    HGLOBAL hDropContent = createGlobalHDropContent(url, fileName, imageBuffer);
    if (!hDropContent) {
        GlobalFree(hDropContent);
        return;
    }

    writeFileToDataObject(dataObject, imageFileDescriptor, imageFileContent, hDropContent);
}
static void writeImageToDataObject(DataObject* dataObject, Element* element,
                                   const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->image() || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->image()->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    dataObject->fileContent = imageBuffer;

    // Determine the filename for the file contents of the image.  We try to
    // use the alt tag if one exists, otherwise we fall back on the suggested
    // filename in the http header, and finally we resort to using the filename
    // in the URL.
    /*String extension = MIMETypeRegistry::getPreferredExtensionForMIMEType(
        cachedImage->response().mimeType());*/
    String extension = "png";
    dataObject->fileExtension = extension.isEmpty() ? "" : "." + extension;
    String title = element->getAttribute(altAttr);
    if (title.isEmpty())
        title = cachedImage->response().suggestedFilename();

    //title = ClipboardBal::validateFileName(title, dataObject);
    dataObject->fileContentFilename = title + dataObject->fileExtension;
}
void SynchronousNetworkLoaderClient::sendDelayedReply(NetworkResourceLoader& loader)
{
    ASSERT(m_delayedReply);

    if (m_response.isNull()) {
        ASSERT(!m_error.isNull());
        //platformSynthesizeErrorResponse();
    }

    Vector<char> responseData;
    SharedBuffer* buffer = loader.bufferedData();
    if (buffer && buffer->size())
        responseData.append(buffer->data(), buffer->size());

    m_delayedReply->send(m_error, m_response, responseData);
    m_delayedReply = nullptr;
}
Example #16
0
size_t sharedBufferGetBytesAtPosition(void* info, void* buffer, off_t position, size_t count)
{
    SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
    size_t sourceSize = sharedBuffer->size();
    if (position >= sourceSize)
        return 0;

    const char* source = sharedBuffer->data() + position;
    size_t amount = min<size_t>(count, sourceSize - position);
    memcpy(buffer, source, amount);
    return amount;
}
static void clearEntriesByType(uint32_t** entriesByType)
{
    SharedBuffer* buf = SharedBuffer::bufferFromData(entriesByType);
    const size_t N = buf->size() / sizeof(entriesByType[0]);
    for (size_t i = 0; i < N; i++) {
        uint32_t* entries = entriesByType[i];
        if (entries != NULL) {
            SharedBuffer::bufferFromData(entries)->release();
        }
    }
    buf->release();
}
void DeferredImageDecoder::setData(SharedBuffer& data, bool allDataReceived)
{
    if (m_actualDecoder) {
        m_data = RefPtr<SharedBuffer>(data);
        m_lastDataSize = data.size();
        m_allDataReceived = allDataReceived;
        m_actualDecoder->setData(&data, allDataReceived);
        prepareLazyDecodedFrames();
    }

    if (m_frameGenerator)
        m_frameGenerator->setData(&data, allDataReceived);
}
std::unique_ptr<FontCustomPlatformData> createFontCustomPlatformData(SharedBuffer& buffer)
{
    static FT_Library library;
    if (!library && FT_Init_FreeType(&library)) {
        library = nullptr;
        return nullptr;
    }

    FT_Face freeTypeFace;
    if (FT_New_Memory_Face(library, reinterpret_cast<const FT_Byte*>(buffer.data()), buffer.size(), 0, &freeTypeFace))
        return nullptr;
    return std::make_unique<FontCustomPlatformData>(freeTypeFace, buffer);
}
Example #20
0
static xmlDocPtr docLoaderFunc(const xmlChar* uri,
                               xmlDictPtr,
                               int options,
                               void* ctxt,
                               xsltLoadType type)
{
    if (!globalProcessor)
        return 0;

    switch (type) {
    case XSLT_LOAD_DOCUMENT: {
        xsltTransformContextPtr context = (xsltTransformContextPtr)ctxt;
        xmlChar* base = xmlNodeGetBase(context->document->doc, context->node);
        KURL url(KURL(ParsedURLString, reinterpret_cast<const char*>(base)), reinterpret_cast<const char*>(uri));
        xmlFree(base);

        ResourceLoaderOptions fetchOptions(ResourceFetcher::defaultResourceOptions());
        FetchRequest request(ResourceRequest(url), FetchInitiatorTypeNames::xml, fetchOptions);
        request.setOriginRestriction(FetchRequest::RestrictToSameOrigin);
        ResourcePtr<Resource> resource = globalResourceFetcher->fetchSynchronously(request);
        if (!resource || !globalProcessor)
            return 0;

        PageConsole* console = 0;
        Frame* frame = globalProcessor->xslStylesheet()->ownerDocument()->frame();
        if (frame && frame->page())
            console = &frame->page()->console();
        xmlSetStructuredErrorFunc(console, XSLTProcessor::parseErrorFunc);
        xmlSetGenericErrorFunc(console, XSLTProcessor::genericErrorFunc);

        // We don't specify an encoding here. Neither Gecko nor WinIE respects
        // the encoding specified in the HTTP headers.
        SharedBuffer* data = resource->resourceBuffer();
        xmlDocPtr doc = data ? xmlReadMemory(data->data(), data->size(), (const char*)uri, 0, options) : 0;

        xmlSetStructuredErrorFunc(0, 0);
        xmlSetGenericErrorFunc(0, 0);

        return doc;
    }
    case XSLT_LOAD_STYLESHEET:
        return globalProcessor->xslStylesheet()->locateStylesheetSubResource(((xsltStylesheetPtr)ctxt)->doc, uri);
    default:
        break;
    }

    return 0;
}
Example #21
0
void CachedResource::tryReplaceEncodedData(SharedBuffer& newBuffer)
{
    if (!m_data)
        return;
    
    if (!mayTryReplaceEncodedData())
        return;

    // We have to do the memcmp because we can't tell if the replacement file backed data is for the
    // same resource or if we made a second request with the same URL which gave us a different
    // resource. We have seen this happen for cached POST resources.
    if (m_data->size() != newBuffer.size() || memcmp(m_data->data(), newBuffer.data(), m_data->size()))
        return;

    if (m_data->tryReplaceContentsWithPlatformBuffer(newBuffer))
        didReplaceSharedBufferContents();
}
static void writeImageToDataObject(DataObject* dataObject, Element* element, const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    ImageResource* cachedImage = getImageResource(element);
    if (!cachedImage || !cachedImage->imageForLayoutObject(element->layoutObject()) || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->imageForLayoutObject(element->layoutObject())->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    String imageExtension = cachedImage->image()->filenameExtension();
    ASSERT(!imageExtension.isEmpty());

    // Determine the filename for the file contents of the image.
    String filename = cachedImage->response().suggestedFilename();
    if (filename.isEmpty())
        filename = url.lastPathComponent();

    String fileExtension;
    if (filename.isEmpty()) {
        filename = element->getAttribute(HTMLNames::altAttr);
    } else {
        // Strip any existing extension. Assume that alt text is usually not a filename.
        int extensionIndex = filename.reverseFind('.');
        if (extensionIndex != -1) {
            fileExtension = filename.substring(extensionIndex + 1);
            filename.truncate(extensionIndex);
        }
    }

    if (!fileExtension.isEmpty() && fileExtension != imageExtension) {
        String imageMimeType = MIMETypeRegistry::getMIMETypeForExtension(imageExtension);
        ASSERT(imageMimeType.startsWith("image/"));
        // Use the file extension only if it has imageMimeType: it's untrustworthy otherwise.
        if (imageMimeType == MIMETypeRegistry::getMIMETypeForExtension(fileExtension))
            imageExtension = fileExtension;
    }

    imageExtension = "." + imageExtension;
    validateFilename(filename, imageExtension);

    dataObject->addSharedBuffer(filename + imageExtension, imageBuffer);
}
void CachedRawResource::addDataBuffer(SharedBuffer& data)
{
    CachedResourceHandle<CachedRawResource> protect(this);
    ASSERT(dataBufferingPolicy() == BufferData);
    m_data = &data;

    unsigned incrementalDataLength;
    const char* incrementalData = calculateIncrementalDataChunk(&data, incrementalDataLength);
    setEncodedSize(data.size());
    notifyClientsDataWasReceived(incrementalData, incrementalDataLength);
    if (dataBufferingPolicy() == DoNotBufferData) {
        if (m_loader)
            m_loader->setDataBufferingPolicy(DoNotBufferData);
        clear();
        return;
    }

    CachedResource::addDataBuffer(data);
}
Example #24
0
bool DocumentLoader::scheduleArchiveLoad(Resource* cachedResource, const ResourceRequest& request)
{
    if (!m_archive)
        return false;

    ASSERT(m_archiveResourceCollection);
    ArchiveResource* archiveResource = m_archiveResourceCollection->archiveResourceForURL(request.url());
    if (!archiveResource) {
        cachedResource->error(Resource::LoadError);
        return true;
    }

    cachedResource->setLoading(true);
    cachedResource->responseReceived(archiveResource->response(), nullptr);
    SharedBuffer* data = archiveResource->data();
    if (data)
        cachedResource->appendData(data->data(), data->size());
    cachedResource->finish();
    return true;
}
Example #25
0
void ImageDecoder::setData(SharedBuffer& data, bool allDataReceived)
{
    if (!allDataReceived)
        return;

    COMPtr<IWICStream> stream;
    HRESULT hr = systemImagingFactory()->CreateStream(&stream);
    if (!SUCCEEDED(hr))
        return;

    char* dataPtr = const_cast<char*>(data.data());
    hr = stream->InitializeFromMemory(reinterpret_cast<BYTE*>(dataPtr), data.size());
    if (!SUCCEEDED(hr))
        return;

    m_nativeDecoder = nullptr;

    hr = systemImagingFactory()->CreateDecoderFromStream(stream.get(), nullptr, WICDecodeMetadataCacheOnDemand, &m_nativeDecoder);
    ASSERT(SUCCEEDED(hr));
}
size_t EOTStream::read(void* buffer, size_t count)
{
    size_t bytesToRead = count;
    if (m_inHeader) {
        size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count);
        memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader);
        m_offset += bytesFromHeader;
        bytesToRead -= bytesFromHeader;
        if (m_offset == m_eotHeader.size()) {
            m_inHeader = false;
            m_offset = 0;
        }
    }
    if (bytesToRead && !m_inHeader) {
        size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead);
        memcpy(buffer, m_fontData->data() + m_offset, bytesFromData);
        m_offset += bytesFromData;
        bytesToRead -= bytesFromData;
    }
    return count - bytesToRead;
}
Example #27
0
void TextTrackLoader::processNewCueData(CachedResource* resource)
{
    ASSERT(m_cachedCueData == resource);
    
    if (m_state == Failed || !resource->data())
        return;
    
    SharedBuffer* buffer = resource->data();
    if (m_parseOffset == buffer->size())
        return;

    if (!m_cueParser)
        m_cueParser = WebVTTParser::create(this, m_scriptExecutionContext);

    const char* data;
    unsigned length;

    while ((length = buffer->getSomeData(data, m_parseOffset))) {
        m_cueParser->parseBytes(data, length);
        m_parseOffset += length;
    }
}
Example #28
0
static void writeImageToDataObject(ChromiumDataObject* dataObject, Element* element,
                                   const KURL& url)
{
    // Shove image data into a DataObject for use as a file
    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->imageForRenderer(element->renderer()) || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->imageForRenderer(element->renderer())->data();
    if (!imageBuffer || !imageBuffer->size())
        return;

    dataObject->setFileContent(imageBuffer);

    // Determine the filename for the file contents of the image.
    String filename = cachedImage->response().suggestedFilename();
    if (filename.isEmpty())
        filename = url.lastPathComponent();
    if (filename.isEmpty())
        filename = element->getAttribute(altAttr);
    else {
        // Strip any existing extension. Assume that alt text is usually not a filename.
        int extensionIndex = filename.reverseFind('.');
        if (extensionIndex != -1)
            filename.truncate(extensionIndex);
    }

    String extension = MIMETypeRegistry::getPreferredExtensionForMIMEType(
        cachedImage->response().mimeType());
    extension = extension.isEmpty() ? emptyString() : "." + extension;

    ClipboardChromium::validateFilename(filename, extension);

    dataObject->setFileContentFilename(filename + extension);
    dataObject->setFileExtension(extension);
}
Example #29
0
    bool decode(const SharedBuffer& data, bool onlySize)
    {
        unsigned newByteCount = data.size() - m_bufferLength;
        unsigned readOffset = m_bufferLength - m_info.src->bytes_in_buffer;

        m_info.src->bytes_in_buffer += newByteCount;
        m_info.src->next_input_byte = (JOCTET*)(data.data()) + readOffset;

        // If we still have bytes to skip, try to skip those now.
        if (m_bytesToSkip)
            skipBytes(m_bytesToSkip);

        m_bufferLength = data.size();

        // We need to do the setjmp here. Otherwise bad things will happen
        if (setjmp(m_err.setjmp_buffer))
            return m_decoder->setFailed();

        switch (m_state) {
        case JPEG_HEADER:
            // Read file parameters with jpeg_read_header().
            if (jpeg_read_header(&m_info, true) == JPEG_SUSPENDED)
                return false; // I/O suspension.

            switch (m_info.jpeg_color_space) {
            case JCS_GRAYSCALE:
            case JCS_RGB:
            case JCS_YCbCr:
                // libjpeg can convert GRAYSCALE and YCbCr image pixels to RGB.
                m_info.out_color_space = rgbOutputColorSpace();
#if defined(TURBO_JPEG_RGB_SWIZZLE)
                if (m_info.saw_JFIF_marker)
                    break;
                // FIXME: Swizzle decoding does not support Adobe transform=0
                // images (yet), so revert to using JSC_RGB in that case.
                if (m_info.saw_Adobe_marker && !m_info.Adobe_transform)
                    m_info.out_color_space = JCS_RGB;
#endif
                break;
            case JCS_CMYK:
            case JCS_YCCK:
                // libjpeg can convert YCCK to CMYK, but neither to RGB, so we
                // manually convert CMKY to RGB.
                m_info.out_color_space = JCS_CMYK;
                break;
            default:
                return m_decoder->setFailed();
            }

            m_state = JPEG_START_DECOMPRESS;

            // We can fill in the size now that the header is available.
            if (!m_decoder->setSize(m_info.image_width, m_info.image_height))
                return false;

            // Calculate and set decoded size.
            m_info.scale_num = m_decoder->desiredScaleNumerator();
            m_info.scale_denom = scaleDenominator;
            jpeg_calc_output_dimensions(&m_info);
            m_decoder->setDecodedSize(m_info.output_width, m_info.output_height);

            m_decoder->setOrientation(readImageOrientation(info()));

#if USE(QCMSLIB)
            // Allow color management of the decoded RGBA pixels if possible.
            if (!m_decoder->ignoresGammaAndColorProfile()) {
                ColorProfile colorProfile;
                readColorProfile(info(), colorProfile);
                createColorTransform(colorProfile, colorSpaceHasAlpha(m_info.out_color_space));
#if defined(TURBO_JPEG_RGB_SWIZZLE)
                // Input RGBA data to qcms. Note: restored to BGRA on output.
                if (m_transform && m_info.out_color_space == JCS_EXT_BGRA)
                    m_info.out_color_space = JCS_EXT_RGBA;
#endif
            }
#endif
            // Don't allocate a giant and superfluous memory buffer when the
            // image is a sequential JPEG.
            m_info.buffered_image = jpeg_has_multiple_scans(&m_info);

            if (onlySize) {
                // We can stop here. Reduce our buffer length and available data.
                m_bufferLength -= m_info.src->bytes_in_buffer;
                m_info.src->bytes_in_buffer = 0;
                return true;
            }
        // FALL THROUGH

        case JPEG_START_DECOMPRESS:
            // Set parameters for decompression.
            // FIXME -- Should reset dct_method and dither mode for final pass
            // of progressive JPEG.
            m_info.dct_method = dctMethod();
            m_info.dither_mode = ditherMode();
            m_info.do_fancy_upsampling = doFancyUpsampling();
            m_info.enable_2pass_quant = false;
            m_info.do_block_smoothing = true;

            // Make a one-row-high sample array that will go away when done with
            // image. Always make it big enough to hold an RGB row. Since this
            // uses the IJG memory manager, it must be allocated before the call
            // to jpeg_start_compress().
            // FIXME: note that some output color spaces do not need the samples
            // buffer. Remove this allocation for those color spaces.
            m_samples = (*m_info.mem->alloc_sarray)(reinterpret_cast<j_common_ptr>(&m_info), JPOOL_IMAGE, m_info.output_width * 4, 1);

            // Start decompressor.
            if (!jpeg_start_decompress(&m_info))
                return false; // I/O suspension.

            // If this is a progressive JPEG ...
            m_state = (m_info.buffered_image) ? JPEG_DECOMPRESS_PROGRESSIVE : JPEG_DECOMPRESS_SEQUENTIAL;
        // FALL THROUGH

        case JPEG_DECOMPRESS_SEQUENTIAL:
            if (m_state == JPEG_DECOMPRESS_SEQUENTIAL) {

                if (!m_decoder->outputScanlines())
                    return false; // I/O suspension.

                // If we've completed image output...
                ASSERT(m_info.output_scanline == m_info.output_height);
                m_state = JPEG_DONE;
            }
        // FALL THROUGH

        case JPEG_DECOMPRESS_PROGRESSIVE:
            if (m_state == JPEG_DECOMPRESS_PROGRESSIVE) {
                int status;
                do {
                    status = jpeg_consume_input(&m_info);
                } while ((status != JPEG_SUSPENDED) && (status != JPEG_REACHED_EOI));

                for (;;) {
                    if (!m_info.output_scanline) {
                        int scan = m_info.input_scan_number;

                        // If we haven't displayed anything yet
                        // (output_scan_number == 0) and we have enough data for
                        // a complete scan, force output of the last full scan.
                        if (!m_info.output_scan_number && (scan > 1) && (status != JPEG_REACHED_EOI))
                            --scan;

                        if (!jpeg_start_output(&m_info, scan))
                            return false; // I/O suspension.
                    }

                    if (m_info.output_scanline == 0xffffff)
                        m_info.output_scanline = 0;

                    // If outputScanlines() fails, it deletes |this|. Therefore,
                    // copy the decoder pointer and use it to check for failure
                    // to avoid member access in the failure case.
                    JPEGImageDecoder* decoder = m_decoder;
                    if (!decoder->outputScanlines()) {
                        if (decoder->failed()) // Careful; |this| is deleted.
                            return false;
                        if (!m_info.output_scanline)
                            // Didn't manage to read any lines - flag so we
                            // don't call jpeg_start_output() multiple times for
                            // the same scan.
                            m_info.output_scanline = 0xffffff;
                        return false; // I/O suspension.
                    }

                    if (m_info.output_scanline == m_info.output_height) {
                        if (!jpeg_finish_output(&m_info))
                            return false; // I/O suspension.

                        if (jpeg_input_complete(&m_info) && (m_info.input_scan_number == m_info.output_scan_number))
                            break;

                        m_info.output_scanline = 0;
                    }
                }

                m_state = JPEG_DONE;
            }
        // FALL THROUGH

        case JPEG_DONE:
            // Finish decompression.
            return jpeg_finish_decompress(&m_info);

        case JPEG_ERROR:
            // We can get here if the constructor failed.
            return m_decoder->setFailed();
        }

        return true;
    }
Example #30
0
void ImageDecoder::setData(SharedBuffer& data, bool allDataReceived)
{
    m_isAllDataReceived = allDataReceived;

#if PLATFORM(COCOA)
    // On Mac the NSData inside the SharedBuffer can be secretly appended to without the SharedBuffer's knowledge.
    // We use SharedBuffer's ability to wrap itself inside CFData to get around this, ensuring that ImageIO is
    // really looking at the SharedBuffer.
    CGImageSourceUpdateData(m_nativeDecoder.get(), data.createCFData().get(), allDataReceived);
#else
    // Create a CGDataProvider to wrap the SharedBuffer.
    data.ref();
    // We use the GetBytesAtPosition callback rather than the GetBytePointer one because SharedBuffer
    // does not provide a way to lock down the byte pointer and guarantee that it won't move, which
    // is a requirement for using the GetBytePointer callback.
    CGDataProviderDirectCallbacks providerCallbacks = { 0, 0, 0, sharedBufferGetBytesAtPosition, sharedBufferRelease };
    RetainPtr<CGDataProviderRef> dataProvider = adoptCF(CGDataProviderCreateDirect(&data, data.size(), &providerCallbacks));
    CGImageSourceUpdateDataProvider(m_nativeDecoder.get(), dataProvider.get(), allDataReceived);
#endif
}