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/*
* Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
* Copyright (C) 2006 Apple Inc.
* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2007, 2008, 2009 Rob Buis <buis@kde.org>
* Copyright (C) 2009 Google, Inc.
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
*
* 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 "RenderSVGImage.h"
#include "FloatQuad.h"
#include "GraphicsContext.h"
#include "HitTestResult.h"
#include "LayoutRepainter.h"
#include "PointerEventsHitRules.h"
#include "RenderImageResource.h"
#include "RenderLayer.h"
#include "RenderSVGResource.h"
#include "RenderSVGResourceFilter.h"
#include "SVGImageElement.h"
#include "SVGRenderingContext.h"
#include "SVGResources.h"
#include "SVGResourcesCache.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/StackStats.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGImage);
RenderSVGImage::RenderSVGImage(SVGImageElement& element, RenderStyle&& style)
: RenderSVGModelObject(element, WTFMove(style))
, m_needsBoundariesUpdate(true)
, m_needsTransformUpdate(true)
, m_imageResource(makeUnique<RenderImageResource>())
{
imageResource().initialize(*this);
}
RenderSVGImage::~RenderSVGImage() = default;
void RenderSVGImage::willBeDestroyed()
{
imageResource().shutdown();
RenderSVGModelObject::willBeDestroyed();
}
SVGImageElement& RenderSVGImage::imageElement() const
{
return downcast<SVGImageElement>(RenderSVGModelObject::element());
}
FloatRect RenderSVGImage::calculateObjectBoundingBox() const
{
LayoutSize intrinsicSize;
if (CachedImage* cachedImage = imageResource().cachedImage())
intrinsicSize = cachedImage->imageSizeForRenderer(nullptr, style().effectiveZoom());
SVGLengthContext lengthContext(&imageElement());
Length width = style().width();
Length height = style().height();
float concreteWidth;
if (!width.isAuto())
concreteWidth = lengthContext.valueForLength(width, SVGLengthMode::Width);
else if (!height.isAuto() && !intrinsicSize.isEmpty())
concreteWidth = lengthContext.valueForLength(height, SVGLengthMode::Height) * intrinsicSize.width() / intrinsicSize.height();
else
concreteWidth = intrinsicSize.width();
float concreteHeight;
if (!height.isAuto())
concreteHeight = lengthContext.valueForLength(height, SVGLengthMode::Height);
else if (!width.isAuto() && !intrinsicSize.isEmpty())
concreteHeight = lengthContext.valueForLength(width, SVGLengthMode::Width) * intrinsicSize.height() / intrinsicSize.width();
else
concreteHeight = intrinsicSize.height();
return { imageElement().x().value(lengthContext), imageElement().y().value(lengthContext), concreteWidth, concreteHeight };
}
bool RenderSVGImage::updateImageViewport()
{
FloatRect oldBoundaries = m_objectBoundingBox;
m_objectBoundingBox = calculateObjectBoundingBox();
bool updatedViewport = false;
URL imageSourceURL = document().completeURL(imageElement().imageSourceURL());
// Images with preserveAspectRatio=none should force non-uniform scaling. This can be achieved
// by setting the image's container size to its intrinsic size.
// See: http://www.w3.org/TR/SVG/single-page.html, 7.8 The ‘preserveAspectRatio’ attribute.
if (imageElement().preserveAspectRatio().align() == SVGPreserveAspectRatioValue::SVG_PRESERVEASPECTRATIO_NONE) {
if (CachedImage* cachedImage = imageResource().cachedImage()) {
LayoutSize intrinsicSize = cachedImage->imageSizeForRenderer(nullptr, style().effectiveZoom());
if (intrinsicSize != imageResource().imageSize(style().effectiveZoom())) {
imageResource().setContainerContext(roundedIntSize(intrinsicSize), imageSourceURL);
updatedViewport = true;
}
}
}
if (oldBoundaries != m_objectBoundingBox) {
if (!updatedViewport)
imageResource().setContainerContext(enclosingIntRect(m_objectBoundingBox).size(), imageSourceURL);
updatedViewport = true;
m_needsBoundariesUpdate = true;
}
return updatedViewport;
}
void RenderSVGImage::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
ASSERT(needsLayout());
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(*this) && selfNeedsLayout());
updateImageViewport();
bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_needsBoundariesUpdate;
if (m_needsTransformUpdate) {
m_localTransform = imageElement().animatedLocalTransform();
m_needsTransformUpdate = false;
}
if (m_needsBoundariesUpdate) {
m_repaintBoundingBoxExcludingShadow = m_objectBoundingBox;
SVGRenderSupport::intersectRepaintRectWithResources(*this, m_repaintBoundingBoxExcludingShadow);
m_repaintBoundingBox = m_repaintBoundingBoxExcludingShadow;
m_needsBoundariesUpdate = false;
}
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && selfNeedsLayout())
SVGResourcesCache::clientLayoutChanged(*this);
// If our bounds changed, notify the parents.
if (transformOrBoundariesUpdate)
RenderSVGModelObject::setNeedsBoundariesUpdate();
repainter.repaintAfterLayout();
clearNeedsLayout();
}
void RenderSVGImage::paint(PaintInfo& paintInfo, const LayoutPoint&)
{
if (paintInfo.context().paintingDisabled() || paintInfo.phase != PaintPhase::Foreground
|| style().visibility() == Visibility::Hidden || !imageResource().cachedImage())
return;
FloatRect boundingBox = repaintRectInLocalCoordinates();
if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(boundingBox, m_localTransform, paintInfo))
return;
PaintInfo childPaintInfo(paintInfo);
GraphicsContextStateSaver stateSaver(childPaintInfo.context());
childPaintInfo.applyTransform(m_localTransform);
if (childPaintInfo.phase == PaintPhase::Foreground) {
SVGRenderingContext renderingContext(*this, childPaintInfo);
if (renderingContext.isRenderingPrepared()) {
if (style().svgStyle().bufferedRendering() == BufferedRendering::Static && renderingContext.bufferForeground(m_bufferedForeground))
return;
paintForeground(childPaintInfo);
}
}
if (style().outlineWidth())
paintOutline(childPaintInfo, IntRect(boundingBox));
}
void RenderSVGImage::paintForeground(PaintInfo& paintInfo)
{
RefPtr<Image> image = imageResource().image();
if (!image)
return;
FloatRect destRect = m_objectBoundingBox;
FloatRect srcRect(0, 0, image->width(), image->height());
imageElement().preserveAspectRatio().transformRect(destRect, srcRect);
paintInfo.context().drawImage(*image, destRect, srcRect);
}
void RenderSVGImage::invalidateBufferedForeground()
{
m_bufferedForeground.reset();
}
bool RenderSVGImage::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
{
// We only draw in the forground phase, so we only hit-test then.
if (hitTestAction != HitTestForeground)
return false;
PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, request, style().pointerEvents());
bool isVisible = (style().visibility() == Visibility::Visible);
if (isVisible || !hitRules.requireVisible) {
FloatPoint localPoint = localToParentTransform().inverse().valueOr(AffineTransform()).mapPoint(pointInParent);
if (!SVGRenderSupport::pointInClippingArea(*this, localPoint))
return false;
SVGHitTestCycleDetectionScope hitTestScope(*this);
if (hitRules.canHitFill) {
if (m_objectBoundingBox.contains(localPoint)) {
updateHitTestResult(result, LayoutPoint(localPoint));
if (result.addNodeToListBasedTestResult(nodeForHitTest(), request, localPoint) == HitTestProgress::Stop)
return true;
}
}
}
return false;
}
void RenderSVGImage::imageChanged(WrappedImagePtr, const IntRect*)
{
// The image resource defaults to nullImage until the resource arrives.
// This empty image may be cached by SVG resources which must be invalidated.
if (auto* resources = SVGResourcesCache::cachedResourcesForRenderer(*this))
resources->removeClientFromCache(*this);
// Eventually notify parent resources, that we've changed.
RenderSVGResource::markForLayoutAndParentResourceInvalidation(*this, false);
// Update the SVGImageCache sizeAndScales entry in case image loading finished after layout.
// (https://bugs.webkit.org/show_bug.cgi?id=99489)
m_objectBoundingBox = FloatRect();
if (updateImageViewport())
setNeedsLayout();
invalidateBufferedForeground();
repaint();
}
void RenderSVGImage::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&, const RenderLayerModelObject*)
{
// this is called from paint() after the localTransform has already been applied
LayoutRect contentRect = LayoutRect(repaintRectInLocalCoordinates());
if (!contentRect.isEmpty())
rects.append(contentRect);
}
} // namespace WebCore