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/*
* Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
* Copyright (C) 2006 Apple Computer, 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 "core/rendering/svg/RenderSVGImage.h"
#include "core/paint/SVGImagePainter.h"
#include "core/rendering/ImageQualityController.h"
#include "core/rendering/PointerEventsHitRules.h"
#include "core/rendering/RenderImageResource.h"
#include "core/rendering/svg/RenderSVGResourceContainer.h"
#include "core/rendering/svg/SVGRenderSupport.h"
#include "core/rendering/svg/SVGResources.h"
#include "core/rendering/svg/SVGResourcesCache.h"
#include "core/svg/SVGImageElement.h"
#include "platform/LengthFunctions.h"
#include "third_party/skia/include/core/SkPicture.h"
namespace blink {
RenderSVGImage::RenderSVGImage(SVGImageElement* impl)
: RenderSVGModelObject(impl)
, m_needsBoundariesUpdate(true)
, m_needsTransformUpdate(true)
, m_imageResource(RenderImageResource::create())
{
m_imageResource->initialize(this);
}
RenderSVGImage::~RenderSVGImage()
{
}
void RenderSVGImage::destroy()
{
ImageQualityController::remove(this);
m_imageResource->shutdown();
RenderSVGModelObject::destroy();
}
FloatSize RenderSVGImage::computeImageViewportSize(ImageResource& cachedImage) const
{
if (toSVGImageElement(element())->preserveAspectRatio()->currentValue()->align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)
return m_objectBoundingBox.size();
// Images with preserveAspectRatio=none should force non-uniform
// scaling. This can be achieved by setting the image's container size to
// its viewport size (i.e. if a viewBox is available - use that - else use intrinsic size.)
// See: http://www.w3.org/TR/SVG/single-page.html, 7.8 The ‘preserveAspectRatio’ attribute.
Length intrinsicWidth;
Length intrinsicHeight;
FloatSize intrinsicRatio;
cachedImage.computeIntrinsicDimensions(intrinsicWidth, intrinsicHeight, intrinsicRatio);
return intrinsicRatio;
}
static bool containerSizeIsSetForRenderer(ImageResource& cachedImage, const RenderObject* renderer)
{
const Image* image = cachedImage.image();
// If a container size has been specified for this renderer, then
// imageForRenderer() will return the SVGImageForContainer while image()
// will return the underlying SVGImage.
return !image->isSVGImage() || image != cachedImage.imageForRenderer(renderer);
}
bool RenderSVGImage::updateImageViewport()
{
SVGImageElement* image = toSVGImageElement(element());
FloatRect oldBoundaries = m_objectBoundingBox;
SVGLengthContext lengthContext(image);
m_objectBoundingBox = FloatRect(image->x()->currentValue()->value(lengthContext), image->y()->currentValue()->value(lengthContext), image->width()->currentValue()->value(lengthContext), image->height()->currentValue()->value(lengthContext));
bool boundsChanged = oldBoundaries != m_objectBoundingBox;
bool updatedViewport = false;
ImageResource* cachedImage = m_imageResource->cachedImage();
if (cachedImage && cachedImage->usesImageContainerSize()) {
FloatSize imageViewportSize = computeImageViewportSize(*cachedImage);
if (LayoutSize(imageViewportSize) != m_imageResource->imageSize(style()->effectiveZoom())
|| !containerSizeIsSetForRenderer(*cachedImage, this)) {
m_imageResource->setContainerSizeForRenderer(roundedIntSize(imageViewportSize));
updatedViewport = true;
}
}
m_needsBoundariesUpdate |= boundsChanged;
return updatedViewport || boundsChanged;
}
void RenderSVGImage::layout()
{
ASSERT(needsLayout());
updateImageViewport();
bool transformOrBoundariesUpdate = m_needsTransformUpdate || m_needsBoundariesUpdate;
if (m_needsTransformUpdate) {
m_localTransform = toSVGImageElement(element())->calculateAnimatedLocalTransform();
m_needsTransformUpdate = false;
}
if (m_needsBoundariesUpdate) {
m_bufferedForeground.clear();
m_paintInvalidationBoundingBox = m_objectBoundingBox;
SVGRenderSupport::intersectPaintInvalidationRectWithResources(this, m_paintInvalidationBoundingBox);
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();
clearNeedsLayout();
}
void RenderSVGImage::paint(const PaintInfo& paintInfo, const LayoutPoint&)
{
SVGImagePainter(*this).paint(paintInfo);
}
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() == VISIBLE);
if (isVisible || !hitRules.requireVisible) {
FloatPoint localPoint;
if (!SVGRenderSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, localPoint))
return false;
if (hitRules.canHitFill || hitRules.canHitBoundingBox) {
if (m_objectBoundingBox.contains(localPoint)) {
updateHitTestResult(result, roundedLayoutPoint(localPoint));
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 (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this))
resources->removeClientFromCache(this);
// Eventually notify parent resources, that we've changed.
RenderSVGResourceContainer::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();
updateImageViewport();
m_bufferedForeground.clear();
setShouldDoFullPaintInvalidation();
}
void RenderSVGImage::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&) const
{
// this is called from paint() after the localTransform has already been applied
LayoutRect contentRect = LayoutRect(paintInvalidationRectInLocalCoordinates());
if (!contentRect.isEmpty())
rects.append(contentRect);
}
} // namespace blink
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