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/*
* Copyright (C) 2006 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009, 2015 Apple Inc. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SVGImage.h"
#include "Chrome.h"
#include "DOMWindow.h"
#include "DocumentLoader.h"
#include "ElementIterator.h"
#include "FrameLoader.h"
#include "FrameView.h"
#include "ImageBuffer.h"
#include "ImageObserver.h"
#include "IntRect.h"
#include "JSDOMWindowBase.h"
#include "MainFrame.h"
#include "Page.h"
#include "PageConfiguration.h"
#include "RenderSVGRoot.h"
#include "RenderStyle.h"
#include "SVGDocument.h"
#include "SVGFEImageElement.h"
#include "SVGForeignObjectElement.h"
#include "SVGImageClients.h"
#include "SVGImageElement.h"
#include "SVGSVGElement.h"
#include "Settings.h"
#include "TextStream.h"
#include <runtime/JSCInlines.h>
#include <runtime/JSLock.h>
namespace WebCore {
SVGImage::SVGImage(ImageObserver& observer, const URL& url)
: Image(&observer)
, m_url(url)
{
}
SVGImage::~SVGImage()
{
if (m_page) {
// Store m_page in a local variable, clearing m_page, so that SVGImageChromeClient knows we're destructed.
std::unique_ptr<Page> currentPage = WTFMove(m_page);
currentPage->mainFrame().loader().frameDetached(); // Break both the loader and view references to the frame
}
// Verify that page teardown destroyed the Chrome
ASSERT(!m_chromeClient || !m_chromeClient->image());
}
inline SVGSVGElement* SVGImage::rootElement() const
{
if (!m_page)
return nullptr;
return downcast<SVGDocument>(*m_page->mainFrame().document()).rootElement();
}
bool SVGImage::hasSingleSecurityOrigin() const
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return true;
// FIXME: Once foreignObject elements within SVG images are updated to not leak cross-origin data
// (e.g., visited links, spellcheck) we can remove the SVGForeignObjectElement check here and
// research if we can remove the Image::hasSingleSecurityOrigin mechanism entirely.
for (auto& element : descendantsOfType<SVGElement>(*rootElement)) {
if (is<SVGForeignObjectElement>(element))
return false;
if (is<SVGImageElement>(element)) {
if (!downcast<SVGImageElement>(element).hasSingleSecurityOrigin())
return false;
} else if (is<SVGFEImageElement>(element)) {
if (!downcast<SVGFEImageElement>(element).hasSingleSecurityOrigin())
return false;
}
}
// Because SVG image rendering disallows external resources and links,
// these images effectively are restricted to a single security origin.
return true;
}
void SVGImage::setContainerSize(const FloatSize& size)
{
if (!usesContainerSize())
return;
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return;
auto* renderer = downcast<RenderSVGRoot>(rootElement->renderer());
if (!renderer)
return;
FrameView* view = frameView();
view->resize(this->containerSize());
renderer->setContainerSize(IntSize(size));
}
IntSize SVGImage::containerSize() const
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return IntSize();
auto* renderer = downcast<RenderSVGRoot>(rootElement->renderer());
if (!renderer)
return IntSize();
// If a container size is available it has precedence.
IntSize containerSize = renderer->containerSize();
if (!containerSize.isEmpty())
return containerSize;
// Assure that a container size is always given for a non-identity zoom level.
ASSERT(renderer->style().effectiveZoom() == 1);
FloatSize currentSize;
if (rootElement->hasIntrinsicWidth() && rootElement->hasIntrinsicHeight())
currentSize = rootElement->currentViewportSize();
else
currentSize = rootElement->currentViewBoxRect().size();
if (!currentSize.isEmpty())
return IntSize(static_cast<int>(ceilf(currentSize.width())), static_cast<int>(ceilf(currentSize.height())));
// As last resort, use CSS default intrinsic size.
return IntSize(300, 150);
}
void SVGImage::drawForContainer(GraphicsContext& context, const FloatSize containerSize, float zoom, const FloatRect& dstRect,
const FloatRect& srcRect, CompositeOperator compositeOp, BlendMode blendMode)
{
if (!m_page)
return;
ImageObserver* observer = imageObserver();
ASSERT(observer);
// Temporarily reset image observer, we don't want to receive any changeInRect() calls due to this relayout.
setImageObserver(nullptr);
IntSize roundedContainerSize = roundedIntSize(containerSize);
setContainerSize(roundedContainerSize);
FloatRect scaledSrc = srcRect;
scaledSrc.scale(1 / zoom);
// Compensate for the container size rounding by adjusting the source rect.
FloatSize adjustedSrcSize = scaledSrc.size();
adjustedSrcSize.scale(roundedContainerSize.width() / containerSize.width(), roundedContainerSize.height() / containerSize.height());
scaledSrc.setSize(adjustedSrcSize);
draw(context, dstRect, scaledSrc, compositeOp, blendMode, ImageOrientationDescription());
setImageObserver(observer);
}
#if USE(CAIRO)
// Passes ownership of the native image to the caller so NativeImagePtr needs
// to be a smart pointer type.
NativeImagePtr SVGImage::nativeImageForCurrentFrame()
{
if (!m_page)
return nullptr;
// Cairo does not use the accelerated drawing flag, so it's OK to make an unconditionally unaccelerated buffer.
std::unique_ptr<ImageBuffer> buffer = ImageBuffer::create(size(), Unaccelerated);
if (!buffer) // failed to allocate image
return nullptr;
draw(buffer->context(), rect(), rect(), CompositeSourceOver, BlendModeNormal, ImageOrientationDescription());
// FIXME: WK(Bug 113657): We should use DontCopyBackingStore here.
return buffer->copyImage(CopyBackingStore)->nativeImageForCurrentFrame();
}
#endif
void SVGImage::drawPatternForContainer(GraphicsContext& context, const FloatSize& containerSize, float zoom, const FloatRect& srcRect,
const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, CompositeOperator compositeOp, const FloatRect& dstRect, BlendMode blendMode)
{
FloatRect zoomedContainerRect = FloatRect(FloatPoint(), containerSize);
zoomedContainerRect.scale(zoom);
// The ImageBuffer size needs to be scaled to match the final resolution.
AffineTransform transform = context.getCTM();
FloatSize imageBufferScale = FloatSize(transform.xScale(), transform.yScale());
ASSERT(imageBufferScale.width());
ASSERT(imageBufferScale.height());
FloatRect imageBufferSize = zoomedContainerRect;
imageBufferSize.scale(imageBufferScale.width(), imageBufferScale.height());
std::unique_ptr<ImageBuffer> buffer = ImageBuffer::createCompatibleBuffer(expandedIntSize(imageBufferSize.size()), 1, ColorSpaceSRGB, context);
if (!buffer) // Failed to allocate buffer.
return;
drawForContainer(buffer->context(), containerSize, zoom, imageBufferSize, zoomedContainerRect, CompositeSourceOver, BlendModeNormal);
if (context.drawLuminanceMask())
buffer->convertToLuminanceMask();
RefPtr<Image> image = ImageBuffer::sinkIntoImage(WTFMove(buffer), Unscaled);
if (!image)
return;
// Adjust the source rect and transform due to the image buffer's scaling.
FloatRect scaledSrcRect = srcRect;
scaledSrcRect.scale(imageBufferScale.width(), imageBufferScale.height());
AffineTransform unscaledPatternTransform(patternTransform);
unscaledPatternTransform.scale(1 / imageBufferScale.width(), 1 / imageBufferScale.height());
context.setDrawLuminanceMask(false);
image->drawPattern(context, scaledSrcRect, unscaledPatternTransform, phase, spacing, compositeOp, dstRect, blendMode);
}
void SVGImage::draw(GraphicsContext& context, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator compositeOp, BlendMode blendMode, ImageOrientationDescription)
{
if (!m_page)
return;
FrameView* view = frameView();
ASSERT(view);
GraphicsContextStateSaver stateSaver(context);
context.setCompositeOperation(compositeOp, blendMode);
context.clip(enclosingIntRect(dstRect));
float alpha = context.alpha();
bool compositingRequiresTransparencyLayer = compositeOp != CompositeSourceOver || blendMode != BlendModeNormal || alpha < 1;
if (compositingRequiresTransparencyLayer) {
context.beginTransparencyLayer(alpha);
context.setCompositeOperation(CompositeSourceOver, BlendModeNormal);
}
FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
// We can only draw the entire frame, clipped to the rect we want. So compute where the top left
// of the image would be if we were drawing without clipping, and translate accordingly.
FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height());
FloatPoint destOffset = dstRect.location() - topLeftOffset;
context.translate(destOffset.x(), destOffset.y());
context.scale(scale);
view->resize(containerSize());
if (!m_url.isEmpty())
view->scrollToFragment(m_url);
if (view->needsLayout())
view->layout();
view->paint(context, intersection(context.clipBounds(), enclosingIntRect(srcRect)));
if (compositingRequiresTransparencyLayer)
context.endTransparencyLayer();
stateSaver.restore();
if (imageObserver())
imageObserver()->didDraw(this);
}
RenderBox* SVGImage::embeddedContentBox() const
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return nullptr;
return downcast<RenderBox>(rootElement->renderer());
}
FrameView* SVGImage::frameView() const
{
if (!m_page)
return nullptr;
return m_page->mainFrame().view();
}
bool SVGImage::hasRelativeWidth() const
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return false;
return rootElement->intrinsicWidth().isPercentOrCalculated();
}
bool SVGImage::hasRelativeHeight() const
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return false;
return rootElement->intrinsicHeight().isPercentOrCalculated();
}
void SVGImage::computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return;
intrinsicWidth = rootElement->intrinsicWidth();
intrinsicHeight = rootElement->intrinsicHeight();
if (rootElement->preserveAspectRatio().align() == SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)
return;
intrinsicRatio = rootElement->viewBox().size();
if (intrinsicRatio.isEmpty() && intrinsicWidth.isFixed() && intrinsicHeight.isFixed())
intrinsicRatio = FloatSize(floatValueForLength(intrinsicWidth, 0), floatValueForLength(intrinsicHeight, 0));
}
// FIXME: support catchUpIfNecessary.
void SVGImage::startAnimation(CatchUpAnimation)
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return;
rootElement->unpauseAnimations();
rootElement->setCurrentTime(0);
}
void SVGImage::stopAnimation()
{
SVGSVGElement* rootElement = this->rootElement();
if (!rootElement)
return;
rootElement->pauseAnimations();
}
void SVGImage::resetAnimation()
{
stopAnimation();
}
void SVGImage::reportApproximateMemoryCost() const
{
Document* document = m_page->mainFrame().document();
size_t decodedImageMemoryCost = 0;
for (Node* node = document; node; node = NodeTraversal::next(*node))
decodedImageMemoryCost += node->approximateMemoryCost();
JSC::VM& vm = JSDOMWindowBase::commonVM();
JSC::JSLockHolder lock(vm);
// FIXME: Adopt reportExtraMemoryVisited, and switch to reportExtraMemoryAllocated.
// https://bugs.webkit.org/show_bug.cgi?id=142595
vm.heap.deprecatedReportExtraMemory(decodedImageMemoryCost + data()->size());
}
bool SVGImage::dataChanged(bool allDataReceived)
{
// Don't do anything if is an empty image.
if (!data()->size())
return true;
if (allDataReceived) {
PageConfiguration pageConfiguration(makeUniqueRef<EmptyEditorClient>(), makeUniqueRef<EmptySocketProvider>());
fillWithEmptyClients(pageConfiguration);
m_chromeClient = std::make_unique<SVGImageChromeClient>(this);
pageConfiguration.chromeClient = m_chromeClient.get();
// FIXME: If this SVG ends up loading itself, we might leak the world.
// The Cache code does not know about CachedImages holding Frames and
// won't know to break the cycle.
// This will become an issue when SVGImage will be able to load other
// SVGImage objects, but we're safe now, because SVGImage can only be
// loaded by a top-level document.
m_page = std::make_unique<Page>(WTFMove(pageConfiguration));
m_page->settings().setMediaEnabled(false);
m_page->settings().setScriptEnabled(false);
m_page->settings().setPluginsEnabled(false);
Frame& frame = m_page->mainFrame();
frame.setView(FrameView::create(frame));
frame.init();
FrameLoader& loader = frame.loader();
loader.forceSandboxFlags(SandboxAll);
frame.view()->setCanHaveScrollbars(false); // SVG Images will always synthesize a viewBox, if it's not available, and thus never see scrollbars.
frame.view()->setTransparent(true); // SVG Images are transparent.
ASSERT(loader.activeDocumentLoader()); // DocumentLoader should have been created by frame->init().
loader.activeDocumentLoader()->writer().setMIMEType("image/svg+xml");
loader.activeDocumentLoader()->writer().begin(URL()); // create the empty document
loader.activeDocumentLoader()->writer().addData(data()->data(), data()->size());
loader.activeDocumentLoader()->writer().end();
// Set the intrinsic size before a container size is available.
m_intrinsicSize = containerSize();
reportApproximateMemoryCost();
}
return m_page != nullptr;
}
String SVGImage::filenameExtension() const
{
return "svg";
}
bool isInSVGImage(const Element* element)
{
ASSERT(element);
Page* page = element->document().page();
if (!page)
return false;
return page->chrome().client().isSVGImageChromeClient();
}
void SVGImage::dump(TextStream& ts) const
{
Image::dump(ts);
ts.dumpProperty("url", m_url.string());
}
}