C++ ImageResource::getImage方法代码示例

TEST(ImageResourceTest, DecodedDataRemainsWhileHasClients)
{
    ImageResource* cachedImage = ImageResource::create(ResourceRequest());
    cachedImage->setStatus(Resource::Pending);

    Persistent<MockImageResourceClient> client = new MockImageResourceClient(cachedImage);

    // Send the image response.
    cachedImage->responseReceived(ResourceResponse(KURL(), "multipart/x-mixed-replace", 0, nullAtom, String()), nullptr);

    Vector<unsigned char> jpeg = jpegImage();
    cachedImage->responseReceived(ResourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom, String()), nullptr);
    cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    cachedImage->finish();
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_TRUE(client->notifyFinishedCalled());

    // The prune comes when the ImageResource still has clients. The image should not be deleted.
    cachedImage->prune();
    ASSERT_TRUE(cachedImage->hasClientsOrObservers());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());

    // The ImageResource no longer has clients. The image should be deleted by prune.
    client->removeAsClient();
    cachedImage->prune();
    ASSERT_FALSE(cachedImage->hasClientsOrObservers());
    ASSERT_FALSE(cachedImage->hasImage());
    ASSERT_TRUE(cachedImage->getImage()->isNull());
}

LayoutReplaced* LayoutImage::embeddedReplacedContent() const {
  if (!m_imageResource)
    return nullptr;

  ImageResource* cachedImage = m_imageResource->cachedImage();
  if (cachedImage && cachedImage->getImage() &&
      cachedImage->getImage()->isSVGImage())
    return toSVGImage(cachedImage->getImage())->embeddedReplacedContent();

  return nullptr;
}

TEST(ImageResourceTest, FailedRevalidationSvgToSvg) {
  KURL url(ParsedURLString, "http://127.0.0.1:8000/foo");
  ImageResource* imageResource = ImageResource::create(ResourceRequest(url));
  Persistent<MockImageResourceClient> client =
      new MockImageResourceClient(imageResource);

  receiveResponse(imageResource, url, "image/svg+xml", svgImage());

  EXPECT_FALSE(imageResource->errorOccurred());
  ASSERT_TRUE(imageResource->hasImage());
  EXPECT_FALSE(imageResource->getImage()->isNull());
  EXPECT_EQ(client->imageChangedCount(), 1);
  EXPECT_TRUE(client->notifyFinishedCalled());
  EXPECT_FALSE(imageResource->getImage()->isBitmapImage());
  EXPECT_EQ(200, imageResource->getImage()->width());
  EXPECT_EQ(200, imageResource->getImage()->height());

  imageResource->setRevalidatingRequest(ResourceRequest(url));
  receiveResponse(imageResource, url, "image/svg+xml", svgImage2());

  EXPECT_FALSE(imageResource->errorOccurred());
  ASSERT_TRUE(imageResource->hasImage());
  EXPECT_FALSE(imageResource->getImage()->isNull());
  EXPECT_EQ(2, client->imageChangedCount());
  EXPECT_TRUE(client->notifyFinishedCalled());
  EXPECT_FALSE(imageResource->getImage()->isBitmapImage());
  EXPECT_EQ(300, imageResource->getImage()->width());
  EXPECT_EQ(300, imageResource->getImage()->height());
}

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->getImage() || !cachedImage->isLoaded())
        return;

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

    String imageExtension = cachedImage->getImage()->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);
}

// Verifies that ImageBitmaps constructed from HTMLImageElements hold a reference to the original Image if the HTMLImageElement src is changed.
TEST_F(ImageBitmapTest, ImageBitmapSourceChanged)
{
    HTMLImageElement* image = HTMLImageElement::create(*Document::create());
    ImageResource* originalImageResource = ImageResource::create(
        StaticBitmapImage::create(m_image).get());
    image->setImageResource(originalImageResource);

    const ImageBitmapOptions defaultOptions;
    ImageBitmap* imageBitmap = ImageBitmap::create(image,
        IntRect(0, 0, m_image->width(), m_image->height()),
        &(image->document()), defaultOptions);
    ASSERT_EQ(imageBitmap->bitmapImage()->imageForCurrentFrame(), originalImageResource->getImage()->imageForCurrentFrame());

    ImageResource* newImageResource = ImageResource::create(
        StaticBitmapImage::create(m_image2).get());
    image->setImageResource(newImageResource);

    // The ImageBitmap should contain the same data as the original cached image
    {
        ASSERT_EQ(imageBitmap->bitmapImage()->imageForCurrentFrame(), originalImageResource->getImage()->imageForCurrentFrame());
        SkImage* image1 = imageBitmap->bitmapImage()->imageForCurrentFrame().get();
        ASSERT_NE(image1, nullptr);
        SkImage* image2 = originalImageResource->getImage()->imageForCurrentFrame().get();
        ASSERT_NE(image2, nullptr);
        ASSERT_EQ(image1, image2);
    }

    {
        ASSERT_NE(imageBitmap->bitmapImage()->imageForCurrentFrame(), newImageResource->getImage()->imageForCurrentFrame());
        SkImage* image1 = imageBitmap->bitmapImage()->imageForCurrentFrame().get();
        ASSERT_NE(image1, nullptr);
        SkImage* image2 = newImageResource->getImage()->imageForCurrentFrame().get();
        ASSERT_NE(image2, nullptr);
        ASSERT_NE(image1, image2);
    }
}

TEST(ImageResourceTest, ReloadIfLoFi)
{
    KURL testURL(ParsedURLString, "http://www.test.com/cancelTest.html");
    URLTestHelpers::registerMockedURLLoad(testURL, "cancelTest.html", "text/html");
    ResourceRequest request = ResourceRequest(testURL);
    request.setLoFiState(WebURLRequest::LoFiOn);
    ImageResource* cachedImage = ImageResource::create(request);
    cachedImage->setStatus(Resource::Pending);

    Persistent<MockImageResourceClient> client = new MockImageResourceClient(cachedImage);
    ResourceFetcher* fetcher = ResourceFetcher::create(ImageResourceTestMockFetchContext::create());

    // Send the image response.
    Vector<unsigned char> jpeg = jpegImage();
    ResourceResponse resourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom, String());
    resourceResponse.addHTTPHeaderField("chrome-proxy", "q=low");

    cachedImage->responseReceived(resourceResponse, nullptr);
    cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    cachedImage->finish();
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_EQ(client->imageChangedCount(), 2);
    ASSERT_TRUE(client->notifyFinishedCalled());
    ASSERT_TRUE(cachedImage->getImage()->isBitmapImage());
    EXPECT_EQ(1, cachedImage->getImage()->width());
    EXPECT_EQ(1, cachedImage->getImage()->height());

    cachedImage->reloadIfLoFi(fetcher);
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_FALSE(cachedImage->resourceBuffer());
    ASSERT_FALSE(cachedImage->hasImage());
    ASSERT_EQ(client->imageChangedCount(), 3);

    cachedImage->loader()->didReceiveResponse(nullptr, WrappedResourceResponse(resourceResponse), nullptr);
    cachedImage->loader()->didReceiveData(nullptr, reinterpret_cast<const char*>(jpeg.data()), jpeg.size(), jpeg.size());
    cachedImage->loader()->didFinishLoading(nullptr, 0.0, jpeg.size());
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_TRUE(client->notifyFinishedCalled());
    ASSERT_TRUE(cachedImage->getImage()->isBitmapImage());
}

TEST(ImageResourceTest, AddClientAfterPrune)
{
    KURL url(ParsedURLString, "http://127.0.0.1:8000/foo");
    ImageResource* imageResource = ImageResource::create(ResourceRequest(url));

    // Adds a ResourceClient but not ImageResourceObserver.
    Persistent<MockResourceClient> client1 = new MockResourceClient(imageResource);

    Vector<unsigned char> jpeg = jpegImage();
    ResourceResponse response;
    response.setURL(url);
    response.setHTTPStatusCode(200);
    response.setMimeType("image/jpeg");
    imageResource->responseReceived(response, nullptr);
    imageResource->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    imageResource->finish();

    EXPECT_FALSE(imageResource->errorOccurred());
    ASSERT_TRUE(imageResource->hasImage());
    EXPECT_FALSE(imageResource->getImage()->isNull());
    EXPECT_EQ(1, imageResource->getImage()->width());
    EXPECT_EQ(1, imageResource->getImage()->height());
    EXPECT_TRUE(client1->notifyFinishedCalled());

    client1->removeAsClient();

    EXPECT_FALSE(imageResource->hasClientsOrObservers());

    imageResource->prune();

    EXPECT_FALSE(imageResource->hasImage());

    // Re-adds a ResourceClient but not ImageResourceObserver.
    Persistent<MockResourceClient> client2 = new MockResourceClient(imageResource);

    ASSERT_TRUE(imageResource->hasImage());
    EXPECT_FALSE(imageResource->getImage()->isNull());
    EXPECT_EQ(1, imageResource->getImage()->width());
    EXPECT_EQ(1, imageResource->getImage()->height());
    EXPECT_TRUE(client2->notifyFinishedCalled());
}

TEST(ImageResourceTest, ReloadIfLoFiDuringFetch) {
  KURL testURL(ParsedURLString, "http://www.test.com/cancelTest.html");
  ScopedRegisteredURL scopedRegisteredURL(testURL);

  ResourceRequest request(testURL);
  request.setLoFiState(WebURLRequest::LoFiOn);
  FetchRequest fetchRequest(request, FetchInitiatorInfo());
  ResourceFetcher* fetcher =
      ResourceFetcher::create(ImageResourceTestMockFetchContext::create());

  ImageResource* cachedImage = ImageResource::fetch(fetchRequest, fetcher);
  Persistent<MockImageResourceClient> client =
      new MockImageResourceClient(cachedImage);

  // Send the image response.
  Vector<unsigned char> jpeg = jpegImage();

  ResourceResponse initialResourceResponse(testURL, "image/jpeg", jpeg.size(),
                                           nullAtom, String());
  initialResourceResponse.addHTTPHeaderField("chrome-proxy", "q=low");

  cachedImage->loader()->didReceiveResponse(
      nullptr, WrappedResourceResponse(initialResourceResponse));
  cachedImage->loader()->didReceiveData(
      nullptr, reinterpret_cast<const char*>(jpeg.data()), jpeg.size(),
      jpeg.size(), jpeg.size());

  EXPECT_FALSE(cachedImage->errorOccurred());
  ASSERT_TRUE(cachedImage->hasImage());
  EXPECT_FALSE(cachedImage->getImage()->isNull());
  EXPECT_EQ(1, client->imageChangedCount());
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnLastImageChanged());
  EXPECT_FALSE(client->notifyFinishedCalled());
  EXPECT_TRUE(cachedImage->getImage()->isBitmapImage());
  EXPECT_EQ(1, cachedImage->getImage()->width());
  EXPECT_EQ(1, cachedImage->getImage()->height());

  // Call reloadIfLoFi() while the image is still loading.
  cachedImage->reloadIfLoFi(fetcher);
  EXPECT_FALSE(cachedImage->errorOccurred());
  EXPECT_FALSE(cachedImage->resourceBuffer());
  EXPECT_FALSE(cachedImage->hasImage());
  EXPECT_EQ(2, client->imageChangedCount());
  EXPECT_EQ(0U, client->encodedSizeOnLastImageChanged());
  // The client should not have been notified of completion yet, since the image
  // is still loading.
  EXPECT_FALSE(client->notifyFinishedCalled());

  Vector<unsigned char> jpeg2 = jpegImage2();
  cachedImage->loader()->didReceiveResponse(
      nullptr, WrappedResourceResponse(ResourceResponse(
                   testURL, "image/jpeg", jpeg.size(), nullAtom, String())),
      nullptr);
  cachedImage->loader()->didReceiveData(
      nullptr, reinterpret_cast<const char*>(jpeg2.data()), jpeg2.size(),
      jpeg2.size(), jpeg2.size());
  cachedImage->loader()->didFinishLoading(nullptr, 0.0, jpeg2.size());

  EXPECT_FALSE(cachedImage->errorOccurred());
  ASSERT_TRUE(cachedImage->hasImage());
  EXPECT_FALSE(cachedImage->getImage()->isNull());
  EXPECT_EQ(jpeg2.size(), client->encodedSizeOnLastImageChanged());
  // The client should have been notified of completion only after the reload
  // completed.
  EXPECT_TRUE(client->notifyFinishedCalled());
  EXPECT_EQ(jpeg2.size(), client->encodedSizeOnNotifyFinished());
  EXPECT_EQ(jpeg2.size(), client->encodedSizeOnImageNotifyFinished());
  EXPECT_TRUE(cachedImage->getImage()->isBitmapImage());
  EXPECT_EQ(50, cachedImage->getImage()->width());
  EXPECT_EQ(50, cachedImage->getImage()->height());
}