C++ HTMLImageElement::cachedImage方法代码示例

TEST_F(ImageBitmapTest, ImageResourceConsistency)
{
    const ImageBitmapOptions defaultOptions;
    HTMLImageElement* imageElement = HTMLImageElement::create(*Document::create());
    ImageResource* image = ImageResource::create(StaticBitmapImage::create(m_image).get());
    imageElement->setImageResource(image);

    ImageBitmap* imageBitmapNoCrop = ImageBitmap::create(imageElement,
        IntRect(0, 0, m_image->width(), m_image->height()),
        &(imageElement->document()), defaultOptions);
    ImageBitmap* imageBitmapInteriorCrop = ImageBitmap::create(imageElement,
        IntRect(m_image->width() / 2, m_image->height() / 2, m_image->width() / 2, m_image->height() / 2),
        &(imageElement->document()), defaultOptions);
    ImageBitmap* imageBitmapExteriorCrop = ImageBitmap::create(imageElement,
        IntRect(-m_image->width() / 2, -m_image->height() / 2, m_image->width(), m_image->height()),
        &(imageElement->document()), defaultOptions);
    ImageBitmap* imageBitmapOutsideCrop = ImageBitmap::create(imageElement,
        IntRect(-m_image->width(), -m_image->height(), m_image->width(), m_image->height()),
        &(imageElement->document()), defaultOptions);

    ASSERT_EQ(imageBitmapNoCrop->bitmapImage()->imageForCurrentFrame(), imageElement->cachedImage()->getImage()->imageForCurrentFrame());
    ASSERT_NE(imageBitmapInteriorCrop->bitmapImage()->imageForCurrentFrame(), imageElement->cachedImage()->getImage()->imageForCurrentFrame());
    ASSERT_NE(imageBitmapExteriorCrop->bitmapImage()->imageForCurrentFrame(), imageElement->cachedImage()->getImage()->imageForCurrentFrame());

    StaticBitmapImage* emptyImage = imageBitmapOutsideCrop->bitmapImage();
    ASSERT_NE(emptyImage->imageForCurrentFrame(), imageElement->cachedImage()->getImage()->imageForCurrentFrame());
}

void PageSerializer::serializeFrame(Frame* frame)
{
    Document* document = frame->document();
    URL url = document->url();
    if (!url.isValid() || url.isBlankURL()) {
        // For blank frames we generate a fake URL so they can be referenced by their containing frame.
        url = urlForBlankFrame(frame);
    }

    if (m_resourceURLs.contains(url)) {
        // FIXME: We could have 2 frame with the same URL but which were dynamically changed and have now
        // different content. So we should serialize both and somehow rename the frame src in the containing
        // frame. Arg!
        return;
    }

    Vector<Node*> nodes;
    SerializerMarkupAccumulator accumulator(*this, *document, &nodes);
    TextEncoding textEncoding(document->charset());
    CString data;
    if (!textEncoding.isValid()) {
        // FIXME: iframes used as images trigger this. We should deal with them correctly.
        return;
    }
    String text = accumulator.serializeNodes(*document->documentElement(), 0, IncludeNode);
    CString frameHTML = textEncoding.encode(text, EntitiesForUnencodables);
    m_resources->append(Resource(url, document->suggestedMIMEType(), SharedBuffer::create(frameHTML.data(), frameHTML.length())));
    m_resourceURLs.add(url);

    for (Vector<Node*>::iterator iter = nodes.begin(); iter != nodes.end(); ++iter) {
        Node* node = *iter;
        if (!node->isElementNode())
            continue;

        Element* element = toElement(node);
        // We have to process in-line style as it might contain some resources (typically background images).
        if (element->isStyledElement())
            retrieveResourcesForProperties(toStyledElement(element)->inlineStyle(), document);

        if (isHTMLImageElement(element)) {
            HTMLImageElement* imageElement = toHTMLImageElement(element);
            URL url = document->completeURL(imageElement->getAttribute(HTMLNames::srcAttr));
            CachedImage* cachedImage = imageElement->cachedImage();
            addImageToResources(cachedImage, imageElement->renderer(), url);
        } else if (element->hasTagName(HTMLNames::linkTag)) {
            HTMLLinkElement* linkElement = toHTMLLinkElement(element);
            if (CSSStyleSheet* sheet = linkElement->sheet()) {
                URL url = document->completeURL(linkElement->getAttribute(HTMLNames::hrefAttr));
                serializeCSSStyleSheet(sheet, url);
                ASSERT(m_resourceURLs.contains(url));
            }
        } else if (isHTMLStyleElement(element)) {
            if (CSSStyleSheet* sheet = toHTMLStyleElement(element)->sheet())
                serializeCSSStyleSheet(sheet, URL());
        }
    }

    for (Frame* childFrame = frame->tree().firstChild(); childFrame; childFrame = childFrame->tree().nextSibling())
        serializeFrame(childFrame);
}

QVariant QtPixmapInstance::variantFromObject(JSObject* object, QMetaType::Type hint)
{
    if (!object)
        goto returnEmptyVariant;

    if (object->inherits(&JSHTMLImageElement::s_info)) {
        JSHTMLImageElement* elementJSWrapper = static_cast<JSHTMLImageElement*>(object);
        HTMLImageElement* imageElement = static_cast<HTMLImageElement*>(elementJSWrapper->impl());

        if (!imageElement)
            goto returnEmptyVariant;

        CachedImage* cachedImage = imageElement->cachedImage();
        if (!cachedImage)
            goto returnEmptyVariant;

        Image* image = cachedImage->image();
        if (!image)
            goto returnEmptyVariant;

        QPixmap* pixmap = image->nativeImageForCurrentFrame();
        if (!pixmap)
            goto returnEmptyVariant;

        return (hint == static_cast<QMetaType::Type>(qMetaTypeId<QPixmap>()))
                  ? QVariant::fromValue<QPixmap>(*pixmap)
                  : QVariant::fromValue<QImage>(pixmap->toImage());
    }

    if (object->inherits(&QtPixmapRuntimeObject::s_info)) {
        QtPixmapRuntimeObject* runtimeObject = static_cast<QtPixmapRuntimeObject*>(object);
        QtPixmapInstance* instance = static_cast<QtPixmapInstance*>(runtimeObject->getInternalInstance());
        if (!instance)
            goto returnEmptyVariant;

        if (hint == qMetaTypeId<QPixmap>())
            return QVariant::fromValue<QPixmap>(instance->toPixmap());

        if (hint == qMetaTypeId<QImage>())
            return QVariant::fromValue<QImage>(instance->toImage());
    }

returnEmptyVariant:
    if (hint == qMetaTypeId<QPixmap>())
        return QVariant::fromValue<QPixmap>(QPixmap());
    if (hint == qMetaTypeId<QImage>())
        return QVariant::fromValue<QImage>(QImage());
    return QVariant();
}

QVariant QtPixmapRuntime::toQt(JSContextRef context, JSObjectRef obj, QMetaType::Type hint, JSValueRef* exception)
{
    if (!obj)
        return emptyVariantForHint(hint);

    if (JSValueIsObjectOfClass(context, obj, QtPixmapRuntime::getClassRef())) {
        QVariant* originalVariant = static_cast<QVariant*>(JSObjectGetPrivate(obj));
        if (hint == qMetaTypeId<QPixmap>())
            return QVariant::fromValue<QPixmap>(toPixmap(*originalVariant));

        if (hint == qMetaTypeId<QImage>())
            return QVariant::fromValue<QImage>(toImage(*originalVariant));
    }

    JSObject* jsObject = ::toJS(obj);
    if (!jsObject->inherits(&JSHTMLImageElement::s_info))
        return emptyVariantForHint(hint);

    JSHTMLImageElement* elementJSWrapper = static_cast<JSHTMLImageElement*>(jsObject);
    HTMLImageElement* imageElement = static_cast<HTMLImageElement*>(elementJSWrapper->impl());

    if (!imageElement)
        return emptyVariantForHint(hint);

    CachedImage* cachedImage = imageElement->cachedImage();
    if (!cachedImage)
        return emptyVariantForHint(hint);

    Image* image = cachedImage->imageForRenderer(imageElement->renderer());
    if (!image)
        return emptyVariantForHint(hint);

    QImage* nativeImage = image->nativeImageForCurrentFrame();
    if (!nativeImage)
        return emptyVariantForHint(hint);

    return (hint == static_cast<QMetaType::Type>(qMetaTypeId<QPixmap>()))
              ? QVariant::fromValue<QPixmap>(QPixmap::fromImage(*nativeImage))
              : QVariant::fromValue<QImage>(*nativeImage);
}