C++ CachedImage::imageForRenderer方法代码示例

FloatSize CSSCrossfadeValue::fixedSize(const RenderElement* renderer)
{
    float percentage = m_percentageValue->getFloatValue();
    float inversePercentage = 1 - percentage;

    // FIXME: Skip Content Security Policy check when cross fade is applied to an element in a user agent shadow tree.
    // See <https://bugs.webkit.org/show_bug.cgi?id=146663>.
    ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();

    CachedResourceLoader& cachedResourceLoader = renderer->document().cachedResourceLoader();
    CachedImage* cachedFromImage = cachedImageForCSSValue(m_fromValue, cachedResourceLoader, options);
    CachedImage* cachedToImage = cachedImageForCSSValue(m_toValue, cachedResourceLoader, options);

    if (!cachedFromImage || !cachedToImage)
        return FloatSize();

    FloatSize fromImageSize = cachedFromImage->imageForRenderer(renderer)->size();
    FloatSize toImageSize = cachedToImage->imageForRenderer(renderer)->size();

    // Rounding issues can cause transitions between images of equal size to return
    // a different fixed size; avoid performing the interpolation if the images are the same size.
    if (fromImageSize == toImageSize)
        return fromImageSize;

    return FloatSize(fromImageSize.width() * inversePercentage + toImageSize.width() * percentage,
        fromImageSize.height() * inversePercentage + toImageSize.height() * percentage);
}

void ClipboardQt::declareAndWriteDragImage(Element* element, const KURL& url, const String& title, Frame* frame)
{
    ASSERT(frame);

    // WebCore::writeURL(m_writableDataObject.get(), url, title, true, false);
    if (!m_writableData)
        m_writableData = new QMimeData;

    CachedImage* cachedImage = getCachedImage(element);
    if (!cachedImage || !cachedImage->imageForRenderer(element->renderer()) || !cachedImage->isLoaded())
        return;
    QPixmap* pixmap = cachedImage->imageForRenderer(element->renderer())->nativeImageForCurrentFrame();
    if (pixmap)
        m_writableData->setImageData(*pixmap);

    QList<QUrl> urls;
    urls.append(url);

    m_writableData->setText(title);
    m_writableData->setUrls(urls);
    m_writableData->setHtml(createMarkup(element, IncludeNode, 0, ResolveAllURLs));
#ifndef QT_NO_CLIPBOARD
    if (isForCopyAndPaste())
        QApplication::clipboard()->setMimeData(m_writableData);
#endif
}

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->imageForRenderer(element->renderer()) || !cachedImage->isLoaded())
        return;

    SharedBuffer* imageBuffer = cachedImage->imageForRenderer(element->renderer())->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);
}

RefPtr<Image> CSSCrossfadeValue::image(RenderElement* renderer, const FloatSize& size)
{
    if (size.isEmpty())
        return nullptr;

    // FIXME: Skip Content Security Policy check when cross fade is applied to an element in a user agent shadow tree.
    // See <https://bugs.webkit.org/show_bug.cgi?id=146663>.
    ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();

    CachedResourceLoader& cachedResourceLoader = renderer->document().cachedResourceLoader();
    CachedImage* cachedFromImage = cachedImageForCSSValue(m_fromValue, cachedResourceLoader, options);
    CachedImage* cachedToImage = cachedImageForCSSValue(m_toValue, cachedResourceLoader, options);

    if (!cachedFromImage || !cachedToImage)
        return Image::nullImage();

    Image* fromImage = cachedFromImage->imageForRenderer(renderer);
    Image* toImage = cachedToImage->imageForRenderer(renderer);

    if (!fromImage || !toImage)
        return Image::nullImage();

    m_generatedImage = CrossfadeGeneratedImage::create(*fromImage, *toImage, m_percentageValue->getFloatValue(), fixedSize(renderer), size);

    return m_generatedImage;
}

PassRefPtr<Image> CSSFilterImageValue::image(RenderObject* renderer, const IntSize& size)
{
    if (size.isEmpty())
        return 0;

    CachedResourceLoader* cachedResourceLoader = renderer->document()->cachedResourceLoader();
    CachedImage* cachedImage = cachedImageForCSSValue(m_imageValue.get(), cachedResourceLoader);

    if (!cachedImage)
        return Image::nullImage();

    Image* image = cachedImage->imageForRenderer(renderer);

    if (!image)
        return Image::nullImage();

    // Transform Image into ImageBuffer.
    OwnPtr<ImageBuffer> texture = ImageBuffer::create(size);
    if (!texture)
        return Image::nullImage();
    texture->context()->drawImage(image, ColorSpaceDeviceRGB, IntPoint());

    RefPtr<FilterEffectRenderer> filterRenderer = FilterEffectRenderer::create();
    filterRenderer->setSourceImage(texture.release());
    filterRenderer->setSourceImageRect(FloatRect(FloatPoint(), size));
    filterRenderer->setFilterRegion(FloatRect(FloatPoint(), size));
    // FIXME: SVG Filter don't work at the moment.
    if (!filterRenderer->build(0, m_filterOperations, true))
        return Image::nullImage();
    filterRenderer->apply();

    m_generatedImage = filterRenderer->output()->copyImage();

    return m_generatedImage.release();
}

void Pasteboard::writeImage(Node* node, const KURL&, const String&)
{
    ASSERT(node);

    if (!(node->renderer() && node->renderer()->isImage()))
        return;

    RenderImage* renderer = static_cast<RenderImage*>(node->renderer());
    CachedImage* cachedImage = static_cast<CachedImage*>(renderer->cachedImage());
    ASSERT(cachedImage);
    Image* image = cachedImage->imageForRenderer(renderer);
    ASSERT(image);

    clear();

    RefPtr<SharedBitmap> sourceBmp = image->nativeImageForCurrentFrame();
    if (!sourceBmp)
        return;

    IntRect rect(0, 0, sourceBmp->width(), sourceBmp->height());
    BitmapInfo bmpInfo;
    void* pixels;
    HBITMAP resultBitmap = sourceBmp->clipBitmap(rect, true, bmpInfo, pixels);
    if (!resultBitmap)
        return;

    if (::OpenClipboard(m_owner)) {
        ::SetClipboardData(CF_BITMAP, resultBitmap);
        ::CloseClipboard();
    } else
        DeleteObject(resultBitmap);
}

void Pasteboard::writeImage(Node* node, const KURL&, const String& title)
{
    ASSERT(node);

    if (!(node->renderer() && node->renderer()->isImage()))
        return;

    RenderImage* renderer = toRenderImage(node->renderer());
    CachedImage* cachedImage = renderer->cachedImage();
    if (!cachedImage || cachedImage->errorOccurred())
        return;
    Image* image = cachedImage->imageForRenderer(renderer);
    ASSERT(image);

    GtkClipboard* clipboard = gtk_clipboard_get_for_display(gdk_display_get_default(), GDK_SELECTION_CLIPBOARD);
    DataObjectGtk* dataObject = DataObjectGtk::forClipboard(clipboard);

    KURL url = getURLForImageNode(node);
    if (!url.isEmpty()) {
        dataObject->setURL(url, title);

        dataObject->setMarkup(createMarkup(static_cast<Element*>(node), IncludeNode, 0, ResolveAllURLs));
    }

    GRefPtr<GdkPixbuf> pixbuf = adoptGRef(image->getGdkPixbuf());
    dataObject->setImage(pixbuf.get());

    PasteboardHelper::defaultPasteboardHelper()->writeClipboardContents(clipboard);
}

void Pasteboard::writeImage(Node* node, const KURL&, const String& title)
{
    ASSERT(node);

    if (!(node->renderer() && node->renderer()->isImage()))
        return;

    RenderImage* renderer = toRenderImage(node->renderer());
    CachedImage* cachedImage = renderer->cachedImage();
    if (!cachedImage || cachedImage->errorOccurred())
        return;
    Image* image = cachedImage->imageForRenderer(renderer);
    ASSERT(image);

    NativeImagePtr bitmap = image->nativeImageForCurrentFrame();
    if (!bitmap)
        return;

    // If the image is wrapped in a link, |url| points to the target of the
    // link.  This isn't useful to us, so get the actual image URL.
    AtomicString urlString;
    if (node->hasTagName(HTMLNames::imgTag) || node->hasTagName(HTMLNames::inputTag))
        urlString = static_cast<Element*>(node)->getAttribute(HTMLNames::srcAttr);
#if ENABLE(SVG)
    else if (node->hasTagName(SVGNames::imageTag))
        urlString = static_cast<Element*>(node)->getAttribute(XLinkNames::hrefAttr);
#endif
    else if (node->hasTagName(HTMLNames::embedTag) || node->hasTagName(HTMLNames::objectTag)) {
        Element* element = static_cast<Element*>(node);
        urlString = element->getAttribute(element->imageSourceAttributeName());
    }
    KURL url = urlString.isEmpty() ? KURL() : node->document()->completeURL(stripLeadingAndTrailingHTMLSpaces(urlString));

    PlatformSupport::clipboardWriteImage(bitmap, url, title);
}

void Pasteboard::writeImage(Element& element, const URL&, const String& title)
{
    if (!(element.renderer() && element.renderer()->isRenderImage()))
        return;

    RenderImage* renderer = toRenderImage(element.renderer());
    CachedImage* cachedImage = renderer->cachedImage();
    if (!cachedImage || cachedImage->errorOccurred())
        return;
    Image* image = cachedImage->imageForRenderer(renderer);
    ASSERT(image);

    m_dataObject->clearAll();

    URL url = getURLForImageElement(element);
    if (!url.isEmpty()) {
        m_dataObject->setURL(url, title);

        m_dataObject->setMarkup(createMarkup(element, IncludeNode, 0, ResolveAllURLs));
    }

    GRefPtr<GdkPixbuf> pixbuf = adoptGRef(image->getGdkPixbuf());
    m_dataObject->setImage(pixbuf.get());

    if (m_gtkClipboard)
        PasteboardHelper::defaultPasteboardHelper()->writeClipboardContents(m_gtkClipboard);
}

IntSize CSSFilterImageValue::fixedSize(const RenderObject* renderer)
{
    CachedResourceLoader* cachedResourceLoader = renderer->document()->cachedResourceLoader();
    CachedImage* cachedImage = cachedImageForCSSValue(m_imageValue.get(), cachedResourceLoader);

    if (!cachedImage)
        return IntSize();

    return cachedImage->imageForRenderer(renderer)->size();
}

bool CanvasRenderingContext::wouldTaintOrigin(const HTMLImageElement* image)
{
    if (!image || !canvas()->originClean())
        return false;

    CachedImage* cachedImage = image->cachedImage();
    if (!cachedImage->imageForRenderer(image->renderer())->hasSingleSecurityOrigin())
        return true;

    return wouldTaintOrigin(cachedImage->response().url()) && !cachedImage->passesAccessControlCheck(canvas()->securityOrigin());
}

PassRefPtr<Image> CSSCrossfadeValue::image(RenderObject* renderer, const IntSize& size)
{
    if (size.isEmpty())
        return 0;

    CachedResourceLoader* cachedResourceLoader = renderer->document()->cachedResourceLoader();
    CachedImage* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), cachedResourceLoader);
    CachedImage* cachedToImage = cachedImageForCSSValue(m_toValue.get(), cachedResourceLoader);

    if (!cachedFromImage || !cachedToImage)
        return Image::nullImage();

    Image* fromImage = cachedFromImage->imageForRenderer(renderer);
    Image* toImage = cachedToImage->imageForRenderer(renderer);

    if (!fromImage || !toImage)
        return Image::nullImage();

    m_generatedImage = CrossfadeGeneratedImage::create(fromImage, toImage, m_percentageValue->getFloatValue(), fixedSize(renderer), size);

    return m_generatedImage.release();
}

static bool getImageForElement(Element& element, RefPtr<Image>& image)
{
    auto* renderer = element.renderer();
    if (!is<RenderImage>(renderer))
        return false;

    CachedImage* cachedImage = downcast<RenderImage>(*renderer).cachedImage();
    if (!cachedImage || cachedImage->errorOccurred())
        return false;

    image = cachedImage->imageForRenderer(renderer);
    return image;
}

IntSize CSSCrossfadeValue::fixedSize(const RenderObject* renderer)
{
    float percentage = m_percentageValue->getFloatValue();
    float inversePercentage = 1 - percentage;

    CachedResourceLoader* cachedResourceLoader = renderer->document()->cachedResourceLoader();
    CachedImage* cachedFromImage = cachedImageForCSSValue(m_fromValue.get(), cachedResourceLoader);
    CachedImage* cachedToImage = cachedImageForCSSValue(m_toValue.get(), cachedResourceLoader);

    if (!cachedFromImage || !cachedToImage)
        return IntSize();

    IntSize fromImageSize = cachedFromImage->imageForRenderer(renderer)->size();
    IntSize toImageSize = cachedToImage->imageForRenderer(renderer)->size();

    // Rounding issues can cause transitions between images of equal size to return
    // a different fixed size; avoid performing the interpolation if the images are the same size.
    if (fromImageSize == toImageSize)
        return fromImageSize;

    return IntSize(fromImageSize.width() * inversePercentage + toImageSize.width() * percentage,
        fromImageSize.height() * inversePercentage + toImageSize.height() * percentage);
}

FloatSize CSSFilterImageValue::fixedSize(const RenderElement* renderer)
{
    // FIXME: Skip Content Security Policy check when filter is applied to an element in a user agent shadow tree.
    // See <https://bugs.webkit.org/show_bug.cgi?id=146663>.
    ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();

    CachedResourceLoader& cachedResourceLoader = renderer->document().cachedResourceLoader();
    CachedImage* cachedImage = cachedImageForCSSValue(m_imageValue.get(), cachedResourceLoader, options);

    if (!cachedImage)
        return FloatSize();

    return cachedImage->imageForRenderer(renderer)->size();
}