--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/CachedImage.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,385 @@
+/*
+ Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
+ Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
+ Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
+ Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
+ Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+#include "CachedImage.h"
+
+#include "BitmapImage.h"
+#include "Cache.h"
+#include "CachedResourceClient.h"
+#include "CachedResourceClientWalker.h"
+#include "DocLoader.h"
+#include "Frame.h"
+#include "FrameLoaderTypes.h"
+#include "FrameView.h"
+#include "Request.h"
+#include "Settings.h"
+#include "SharedBuffer.h"
+#include <wtf/CurrentTime.h>
+#include <wtf/StdLibExtras.h>
+#include <wtf/Vector.h>
+
+#if PLATFORM(CG)
+#include "PDFDocumentImage.h"
+#endif
+
+#if ENABLE(SVG_AS_IMAGE)
+#include "SVGImage.h"
+#endif
+
+using std::max;
+
+namespace WebCore {
+
+CachedImage::CachedImage(const String& url)
+ : CachedResource(url, ImageResource)
+ , m_image(0)
+ , m_decodedDataDeletionTimer(this, &CachedImage::decodedDataDeletionTimerFired)
+ , m_httpStatusCodeErrorOccurred(false)
+{
+ setStatus(Unknown);
+}
+
+CachedImage::CachedImage(Image* image)
+ : CachedResource(String(), ImageResource)
+ , m_image(image)
+ , m_decodedDataDeletionTimer(this, &CachedImage::decodedDataDeletionTimerFired)
+ , m_httpStatusCodeErrorOccurred(false)
+{
+ setStatus(Cached);
+ setLoading(false);
+}
+
+CachedImage::~CachedImage()
+{
+}
+
+void CachedImage::decodedDataDeletionTimerFired(Timer<CachedImage>*)
+{
+ ASSERT(!hasClients());
+ destroyDecodedData();
+}
+
+void CachedImage::load(DocLoader* docLoader)
+{
+ if (!docLoader || docLoader->autoLoadImages())
+ CachedResource::load(docLoader, true, DoSecurityCheck, true);
+ else
+ setLoading(false);
+}
+
+void CachedImage::didAddClient(CachedResourceClient* c)
+{
+ if (m_decodedDataDeletionTimer.isActive())
+ m_decodedDataDeletionTimer.stop();
+
+ if (m_data && !m_image && !errorOccurred()) {
+ createImage();
+ m_image->setData(m_data, true);
+ }
+
+ if (m_image && !m_image->isNull())
+ c->imageChanged(this);
+
+ if (!isLoading())
+ c->notifyFinished(this);
+}
+
+void CachedImage::allClientsRemoved()
+{
+ if (m_image && !errorOccurred())
+ m_image->resetAnimation();
+ if (double interval = cache()->deadDecodedDataDeletionInterval())
+ m_decodedDataDeletionTimer.startOneShot(interval);
+}
+
+static Image* brokenImage()
+{
+ DEFINE_STATIC_LOCAL(RefPtr<Image>, brokenImage, (Image::loadPlatformResource("missingImage")));
+ return brokenImage.get();
+}
+
+static Image* nullImage()
+{
+ DEFINE_STATIC_LOCAL(RefPtr<BitmapImage>, nullImage, (BitmapImage::create()));
+ return nullImage.get();
+}
+
+Image* CachedImage::image() const
+{
+ ASSERT(!isPurgeable());
+
+ if (errorOccurred())
+ return brokenImage();
+
+ if (m_image)
+ return m_image.get();
+
+ return nullImage();
+}
+
+void CachedImage::setImageContainerSize(const IntSize& containerSize)
+{
+ if (m_image)
+ m_image->setContainerSize(containerSize);
+}
+
+bool CachedImage::usesImageContainerSize() const
+{
+ if (m_image)
+ return m_image->usesContainerSize();
+
+ return false;
+}
+
+bool CachedImage::imageHasRelativeWidth() const
+{
+ if (m_image)
+ return m_image->hasRelativeWidth();
+
+ return false;
+}
+
+bool CachedImage::imageHasRelativeHeight() const
+{
+ if (m_image)
+ return m_image->hasRelativeHeight();
+
+ return false;
+}
+
+IntSize CachedImage::imageSize(float multiplier) const
+{
+ ASSERT(!isPurgeable());
+
+ if (!m_image)
+ return IntSize();
+ if (multiplier == 1.0f)
+ return m_image->size();
+
+ // Don't let images that have a width/height >= 1 shrink below 1 when zoomed.
+ bool hasWidth = m_image->size().width() > 0;
+ bool hasHeight = m_image->size().height() > 0;
+ int width = m_image->size().width() * (m_image->hasRelativeWidth() ? 1.0f : multiplier);
+ int height = m_image->size().height() * (m_image->hasRelativeHeight() ? 1.0f : multiplier);
+ if (hasWidth)
+ width = max(1, width);
+ if (hasHeight)
+ height = max(1, height);
+ return IntSize(width, height);
+}
+
+IntRect CachedImage::imageRect(float multiplier) const
+{
+ ASSERT(!isPurgeable());
+
+ if (!m_image)
+ return IntRect();
+ if (multiplier == 1.0f || (!m_image->hasRelativeWidth() && !m_image->hasRelativeHeight()))
+ return m_image->rect();
+
+ float widthMultiplier = (m_image->hasRelativeWidth() ? 1.0f : multiplier);
+ float heightMultiplier = (m_image->hasRelativeHeight() ? 1.0f : multiplier);
+
+ // Don't let images that have a width/height >= 1 shrink below 1 when zoomed.
+ bool hasWidth = m_image->rect().width() > 0;
+ bool hasHeight = m_image->rect().height() > 0;
+
+ int width = static_cast<int>(m_image->rect().width() * widthMultiplier);
+ int height = static_cast<int>(m_image->rect().height() * heightMultiplier);
+ if (hasWidth)
+ width = max(1, width);
+ if (hasHeight)
+ height = max(1, height);
+
+ int x = static_cast<int>(m_image->rect().x() * widthMultiplier);
+ int y = static_cast<int>(m_image->rect().y() * heightMultiplier);
+
+ return IntRect(x, y, width, height);
+}
+
+void CachedImage::notifyObservers(const IntRect* changeRect)
+{
+ CachedResourceClientWalker w(m_clients);
+ while (CachedResourceClient* c = w.next())
+ c->imageChanged(this, changeRect);
+}
+
+void CachedImage::clear()
+{
+ destroyDecodedData();
+ m_image = 0;
+ setEncodedSize(0);
+}
+
+inline void CachedImage::createImage()
+{
+ // Create the image if it doesn't yet exist.
+ if (m_image)
+ return;
+#if PLATFORM(CG)
+ if (m_response.mimeType() == "application/pdf") {
+ m_image = PDFDocumentImage::create();
+ return;
+ }
+#endif
+#if ENABLE(SVG_AS_IMAGE)
+ if (m_response.mimeType() == "image/svg+xml") {
+ m_image = SVGImage::create(this);
+ return;
+ }
+#endif
+ m_image = BitmapImage::create(this);
+}
+
+size_t CachedImage::maximumDecodedImageSize()
+{
+ Frame* frame = m_request ? m_request->docLoader()->frame() : 0;
+ if (!frame)
+ return 0;
+ Settings* settings = frame->settings();
+ return settings ? settings->maximumDecodedImageSize() : 0;
+}
+
+void CachedImage::data(PassRefPtr<SharedBuffer> data, bool allDataReceived)
+{
+ m_data = data;
+
+ createImage();
+
+ bool sizeAvailable = false;
+
+ // Have the image update its data from its internal buffer.
+ // It will not do anything now, but will delay decoding until
+ // queried for info (like size or specific image frames).
+ sizeAvailable = m_image->setData(m_data, allDataReceived);
+
+ // Go ahead and tell our observers to try to draw if we have either
+ // received all the data or the size is known. Each chunk from the
+ // network causes observers to repaint, which will force that chunk
+ // to decode.
+ if (sizeAvailable || allDataReceived) {
+ size_t maxDecodedImageSize = maximumDecodedImageSize();
+ IntSize s = imageSize(1.0f);
+ size_t estimatedDecodedImageSize = s.width() * s.height() * 4; // no overflow check
+ if (m_image->isNull() || (maxDecodedImageSize > 0 && estimatedDecodedImageSize > maxDecodedImageSize)) {
+ error();
+ if (inCache())
+ cache()->remove(this);
+ return;
+ }
+
+ // It would be nice to only redraw the decoded band of the image, but with the current design
+ // (decoding delayed until painting) that seems hard.
+ notifyObservers();
+
+ if (m_image)
+ setEncodedSize(m_image->data() ? m_image->data()->size() : 0);
+ }
+
+ if (allDataReceived) {
+ setLoading(false);
+ checkNotify();
+ }
+}
+
+void CachedImage::error()
+{
+ clear();
+ setErrorOccurred(true);
+ m_data.clear();
+ notifyObservers();
+ setLoading(false);
+ checkNotify();
+}
+
+void CachedImage::checkNotify()
+{
+ if (isLoading())
+ return;
+
+ CachedResourceClientWalker w(m_clients);
+ while (CachedResourceClient* c = w.next())
+ c->notifyFinished(this);
+}
+
+void CachedImage::destroyDecodedData()
+{
+ bool canDeleteImage = !m_image || (m_image->hasOneRef() && m_image->isBitmapImage());
+ if (isSafeToMakePurgeable() && canDeleteImage && !isLoading()) {
+ // Image refs the data buffer so we should not make it purgeable while the image is alive.
+ // Invoking addClient() will reconstruct the image object.
+ m_image = 0;
+ setDecodedSize(0);
+ makePurgeable(true);
+ } else if (m_image && !errorOccurred())
+ m_image->destroyDecodedData();
+}
+
+void CachedImage::decodedSizeChanged(const Image* image, int delta)
+{
+ if (image != m_image)
+ return;
+
+ setDecodedSize(decodedSize() + delta);
+}
+
+void CachedImage::didDraw(const Image* image)
+{
+ if (image != m_image)
+ return;
+
+ double timeStamp = FrameView::currentPaintTimeStamp();
+ if (!timeStamp) // If didDraw is called outside of a Frame paint.
+ timeStamp = currentTime();
+
+ CachedResource::didAccessDecodedData(timeStamp);
+}
+
+bool CachedImage::shouldPauseAnimation(const Image* image)
+{
+ if (image != m_image)
+ return false;
+
+ CachedResourceClientWalker w(m_clients);
+ while (CachedResourceClient* c = w.next()) {
+ if (c->willRenderImage(this))
+ return false;
+ }
+
+ return true;
+}
+
+void CachedImage::animationAdvanced(const Image* image)
+{
+ if (image == m_image)
+ notifyObservers();
+}
+
+void CachedImage::changedInRect(const Image* image, const IntRect& rect)
+{
+ if (image == m_image)
+ notifyObservers(&rect);
+}
+
+} //namespace WebCore