1 files changed, 382 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/loader/CachedImage.cpp b/src/3rdparty/webkit/WebCore/loader/CachedImage.cpp
new file mode 100644
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--- /dev/null
+++ b/src/3rdparty/webkit/WebCore/loader/CachedImage.cpp
@@ -0,0 +1,382 @@
+/*
+    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 "FrameView.h"
+#include "Request.h"
+#include "Settings.h"
+#include "SystemTime.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_status = Unknown;
+}
+
+CachedImage::CachedImage(Image* image)
+    : CachedResource(String(), ImageResource)
+    , m_image(image)
+    , m_decodedDataDeletionTimer(this, &CachedImage::decodedDataDeletionTimerFired)
+{
+    m_status = Cached;
+    m_loading = false;
+}
+
+CachedImage::~CachedImage()
+{
+}
+
+void CachedImage::decodedDataDeletionTimerFired(Timer<CachedImage>*)
+{
+    ASSERT(!hasClients());
+    destroyDecodedData();
+}
+
+void CachedImage::load(DocLoader* docLoader)
+{
+    if (!docLoader || docLoader->autoLoadImages())
+        CachedResource::load(docLoader, true, false, true);
+    else
+        m_loading = false;
+}
+
+void CachedImage::addClient(CachedResourceClient* c)
+{
+    CachedResource::addClient(c);
+
+    if (m_decodedDataDeletionTimer.isActive())
+        m_decodedDataDeletionTimer.stop();
+    
+    if (m_data && !m_image && !m_errorOccurred) {
+        createImage();
+        m_image->setData(m_data, true);
+    }
+
+    if (m_image && !m_image->rect().isEmpty())
+        c->imageChanged(this);
+
+    if (!m_loading)
+        c->notifyFinished(this);
+}
+
+void CachedImage::allClientsRemoved()
+{
+    if (m_image && !m_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 (m_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) {
+        m_loading = false;
+        checkNotify();
+    }
+}
+
+void CachedImage::error()
+{
+    clear();
+    m_errorOccurred = true;
+    notifyObservers();
+    m_loading = false;
+    checkNotify();
+}
+
+void CachedImage::checkNotify()
+{
+    if (m_loading)
+        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 && !m_loading) {
+        // 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 && !m_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