blob: e610ad18b63c1f3cdf71da02a1fbffdce0eb9d0b [file] [log] [blame]
/*
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 <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)
{
m_status = Unknown;
}
CachedImage::CachedImage(Image* image)
: CachedResource(String(), ImageResource)
, m_image(image)
, m_decodedDataDeletionTimer(this, &CachedImage::decodedDataDeletionTimerFired)
, m_httpStatusCodeErrorOccurred(false)
{
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::didAddClient(CachedResourceClient* 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->isNull())
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;
m_data.clear();
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