зеркало из https://github.com/mozilla/gecko-dev.git
575 строки
19 KiB
C++
575 строки
19 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Keep in (case-insensitive) order:
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#include "gfxContext.h"
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#include "gfxMatrix.h"
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#include "gfxPlatform.h"
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#include "imgIContainer.h"
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#include "nsIImageLoadingContent.h"
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#include "nsLayoutUtils.h"
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#include "nsRenderingContext.h"
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#include "imgINotificationObserver.h"
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#include "nsSVGEffects.h"
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#include "nsSVGPathGeometryFrame.h"
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#include "mozilla/dom/SVGSVGElement.h"
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#include "nsSVGUtils.h"
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#include "SVGContentUtils.h"
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#include "SVGImageContext.h"
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#include "mozilla/dom/SVGImageElement.h"
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#include "nsContentUtils.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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class nsSVGImageFrame;
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class nsSVGImageListener MOZ_FINAL : public imgINotificationObserver
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{
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public:
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nsSVGImageListener(nsSVGImageFrame *aFrame);
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NS_DECL_ISUPPORTS
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NS_DECL_IMGINOTIFICATIONOBSERVER
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void SetFrame(nsSVGImageFrame *frame) { mFrame = frame; }
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private:
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nsSVGImageFrame *mFrame;
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};
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typedef nsSVGPathGeometryFrame nsSVGImageFrameBase;
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class nsSVGImageFrame : public nsSVGImageFrameBase
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{
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friend nsIFrame*
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NS_NewSVGImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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nsSVGImageFrame(nsStyleContext* aContext) : nsSVGImageFrameBase(aContext) {}
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virtual ~nsSVGImageFrame();
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public:
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NS_DECL_FRAMEARENA_HELPERS
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// nsISVGChildFrame interface:
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NS_IMETHOD PaintSVG(nsRenderingContext *aContext, const nsIntRect *aDirtyRect);
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NS_IMETHOD_(nsIFrame*) GetFrameForPoint(const nsPoint &aPoint);
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virtual void ReflowSVG();
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// nsSVGPathGeometryFrame methods:
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virtual uint16_t GetHitTestFlags();
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// nsIFrame interface:
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NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType);
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virtual void Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
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virtual void DestroyFrom(nsIFrame* aDestructRoot);
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgImageFrame
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*/
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virtual nsIAtom* GetType() const;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGImage"), aResult);
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}
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#endif
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private:
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gfxMatrix GetRasterImageTransform(int32_t aNativeWidth,
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int32_t aNativeHeight,
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uint32_t aFor);
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gfxMatrix GetVectorImageTransform(uint32_t aFor);
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bool TransformContextForPainting(gfxContext* aGfxContext);
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nsCOMPtr<imgINotificationObserver> mListener;
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nsCOMPtr<imgIContainer> mImageContainer;
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friend class nsSVGImageListener;
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};
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGImageFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGImageFrame)
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nsSVGImageFrame::~nsSVGImageFrame()
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{
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// set the frame to null so we don't send messages to a dead object.
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if (mListener) {
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
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if (imageLoader) {
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imageLoader->RemoveObserver(mListener);
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}
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reinterpret_cast<nsSVGImageListener*>(mListener.get())->SetFrame(nullptr);
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}
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mListener = nullptr;
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}
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void
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nsSVGImageFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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NS_ASSERTION(aContent->IsSVG(nsGkAtoms::image),
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"Content is not an SVG image!");
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nsSVGImageFrameBase::Init(aContent, aParent, aPrevInFlow);
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mListener = new nsSVGImageListener(this);
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
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if (!imageLoader) {
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NS_RUNTIMEABORT("Why is this not an image loading content?");
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}
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// We should have a PresContext now, so let's notify our image loader that
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// we need to register any image animations with the refresh driver.
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imageLoader->FrameCreated(this);
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imageLoader->AddObserver(mListener);
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}
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/* virtual */ void
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nsSVGImageFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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nsCOMPtr<nsIImageLoadingContent> imageLoader =
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do_QueryInterface(nsFrame::mContent);
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if (imageLoader) {
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imageLoader->FrameDestroyed(this);
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}
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nsFrame::DestroyFrom(aDestructRoot);
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}
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//----------------------------------------------------------------------
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// nsIFrame methods:
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NS_IMETHODIMP
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nsSVGImageFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::x ||
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aAttribute == nsGkAtoms::y ||
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aAttribute == nsGkAtoms::width ||
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aAttribute == nsGkAtoms::height) {
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nsSVGEffects::InvalidateRenderingObservers(this);
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nsSVGUtils::ScheduleReflowSVG(this);
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return NS_OK;
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}
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else if (aAttribute == nsGkAtoms::preserveAspectRatio) {
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// Don't invalidate (the layers code does that).
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SchedulePaint();
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return NS_OK;
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}
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}
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if (aNameSpaceID == kNameSpaceID_XLink &&
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aAttribute == nsGkAtoms::href) {
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// Prevent setting image.src by exiting early
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if (nsContentUtils::IsImageSrcSetDisabled()) {
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return NS_OK;
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}
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SVGImageElement *element = static_cast<SVGImageElement*>(mContent);
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if (element->mStringAttributes[SVGImageElement::HREF].IsExplicitlySet()) {
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element->LoadSVGImage(true, true);
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} else {
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element->CancelImageRequests(true);
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}
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}
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return nsSVGImageFrameBase::AttributeChanged(aNameSpaceID,
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aAttribute, aModType);
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}
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gfxMatrix
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nsSVGImageFrame::GetRasterImageTransform(int32_t aNativeWidth,
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int32_t aNativeHeight,
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uint32_t aFor)
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{
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float x, y, width, height;
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SVGImageElement *element = static_cast<SVGImageElement*>(mContent);
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element->GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
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gfxMatrix viewBoxTM =
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SVGContentUtils::GetViewBoxTransform(width, height,
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0, 0, aNativeWidth, aNativeHeight,
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element->mPreserveAspectRatio);
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return viewBoxTM * gfxMatrix().Translate(gfxPoint(x, y)) * GetCanvasTM(aFor);
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}
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gfxMatrix
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nsSVGImageFrame::GetVectorImageTransform(uint32_t aFor)
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{
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float x, y, width, height;
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SVGImageElement *element = static_cast<SVGImageElement*>(mContent);
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element->GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
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// No viewBoxTM needed here -- our height/width overrides any concept of
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// "native size" that the SVG image has, and it will handle viewBox and
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// preserveAspectRatio on its own once we give it a region to draw into.
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return gfxMatrix().Translate(gfxPoint(x, y)) * GetCanvasTM(aFor);
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}
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bool
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nsSVGImageFrame::TransformContextForPainting(gfxContext* aGfxContext)
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{
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gfxMatrix imageTransform;
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if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
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imageTransform = GetVectorImageTransform(FOR_PAINTING);
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} else {
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int32_t nativeWidth, nativeHeight;
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if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
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NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
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nativeWidth == 0 || nativeHeight == 0) {
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return false;
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}
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imageTransform =
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GetRasterImageTransform(nativeWidth, nativeHeight, FOR_PAINTING);
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// NOTE: We need to cancel out the effects of Full-Page-Zoom, or else
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// it'll get applied an extra time by DrawSingleUnscaledImage.
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nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
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gfxFloat pageZoomFactor =
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nsPresContext::AppUnitsToFloatCSSPixels(appUnitsPerDevPx);
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imageTransform.Scale(pageZoomFactor, pageZoomFactor);
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}
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if (imageTransform.IsSingular()) {
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return false;
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}
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aGfxContext->Multiply(imageTransform);
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return true;
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}
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//----------------------------------------------------------------------
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// nsISVGChildFrame methods:
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NS_IMETHODIMP
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nsSVGImageFrame::PaintSVG(nsRenderingContext *aContext,
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const nsIntRect *aDirtyRect)
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{
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nsresult rv = NS_OK;
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if (!StyleVisibility()->IsVisible())
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return NS_OK;
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float x, y, width, height;
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SVGImageElement *imgElem = static_cast<SVGImageElement*>(mContent);
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imgElem->GetAnimatedLengthValues(&x, &y, &width, &height, nullptr);
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NS_ASSERTION(width > 0 && height > 0,
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"Should only be painting things with valid width/height");
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if (!mImageContainer) {
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nsCOMPtr<imgIRequest> currentRequest;
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nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
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if (imageLoader)
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imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(currentRequest));
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if (currentRequest)
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currentRequest->GetImage(getter_AddRefs(mImageContainer));
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}
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if (mImageContainer) {
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gfxContext* ctx = aContext->ThebesContext();
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gfxContextAutoSaveRestore autoRestorer(ctx);
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if (StyleDisplay()->IsScrollableOverflow()) {
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gfxRect clipRect = nsSVGUtils::GetClipRectForFrame(this, x, y,
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width, height);
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nsSVGUtils::SetClipRect(ctx, GetCanvasTM(FOR_PAINTING), clipRect);
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}
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if (!TransformContextForPainting(ctx)) {
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return NS_ERROR_FAILURE;
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}
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// fill-opacity doesn't affect <image>, so if we're allowed to
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// optimize group opacity, the opacity used for compositing the
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// image into the current canvas is just the group opacity.
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float opacity = 1.0f;
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if (nsSVGUtils::CanOptimizeOpacity(this)) {
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opacity = StyleDisplay()->mOpacity;
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}
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if (opacity != 1.0f) {
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ctx->PushGroup(gfxASurface::CONTENT_COLOR_ALPHA);
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}
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nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
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nsRect dirtyRect; // only used if aDirtyRect is non-null
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if (aDirtyRect) {
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NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
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(mState & NS_FRAME_IS_NONDISPLAY),
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"Display lists handle dirty rect intersection test");
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dirtyRect = aDirtyRect->ToAppUnits(appUnitsPerDevPx);
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// Adjust dirtyRect to match our local coordinate system.
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nsRect rootRect =
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nsSVGUtils::TransformFrameRectToOuterSVG(mRect,
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GetCanvasTM(FOR_PAINTING), PresContext());
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dirtyRect.MoveBy(-rootRect.TopLeft());
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}
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// XXXbholley - I don't think huge images in SVGs are common enough to
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// warrant worrying about the responsiveness impact of doing synchronous
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// decodes. The extra code complexity of determinining when we want to
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// force sync probably just isn't worth it, so always pass FLAG_SYNC_DECODE
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uint32_t drawFlags = imgIContainer::FLAG_SYNC_DECODE;
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if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
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// Package up the attributes of this image element which can override the
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// attributes of mImageContainer's internal SVG document.
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SVGImageContext context(imgElem->mPreserveAspectRatio.GetAnimValue());
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nsRect destRect(0, 0,
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appUnitsPerDevPx * width,
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appUnitsPerDevPx * height);
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// Note: Can't use DrawSingleUnscaledImage for the TYPE_VECTOR case.
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// That method needs our image to have a fixed native width & height,
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// and that's not always true for TYPE_VECTOR images.
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nsLayoutUtils::DrawSingleImage(
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aContext,
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mImageContainer,
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nsLayoutUtils::GetGraphicsFilterForFrame(this),
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destRect,
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aDirtyRect ? dirtyRect : destRect,
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&context,
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drawFlags);
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} else { // mImageContainer->GetType() == TYPE_RASTER
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nsLayoutUtils::DrawSingleUnscaledImage(
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aContext,
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mImageContainer,
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nsLayoutUtils::GetGraphicsFilterForFrame(this),
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nsPoint(0, 0),
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aDirtyRect ? &dirtyRect : nullptr,
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drawFlags);
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}
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if (opacity != 1.0f) {
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ctx->PopGroupToSource();
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ctx->SetOperator(gfxContext::OPERATOR_OVER);
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ctx->Paint(opacity);
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}
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// gfxContextAutoSaveRestore goes out of scope & cleans up our gfxContext
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}
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return rv;
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}
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NS_IMETHODIMP_(nsIFrame*)
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nsSVGImageFrame::GetFrameForPoint(const nsPoint &aPoint)
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{
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// Special case for raster images -- we only want to accept points that fall
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// in the underlying image's (transformed) native bounds. That region
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// doesn't necessarily map to our <image> element's [x,y,width,height]. So,
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// we have to look up the native image size & our image transform in order
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// to filter out points that fall outside that area.
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if (StyleDisplay()->IsScrollableOverflow() && mImageContainer) {
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if (mImageContainer->GetType() == imgIContainer::TYPE_RASTER) {
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int32_t nativeWidth, nativeHeight;
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if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
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NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
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nativeWidth == 0 || nativeHeight == 0) {
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return nullptr;
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}
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if (!nsSVGUtils::HitTestRect(
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GetRasterImageTransform(nativeWidth, nativeHeight,
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FOR_HIT_TESTING),
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0, 0, nativeWidth, nativeHeight,
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PresContext()->AppUnitsToDevPixels(aPoint.x),
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PresContext()->AppUnitsToDevPixels(aPoint.y))) {
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return nullptr;
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}
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}
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// The special case above doesn't apply to vector images, because they
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// don't limit their drawing to explicit "native bounds" -- they have
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// an infinite canvas on which to place content. So it's reasonable to
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// just fall back on our <image> element's own bounds here.
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}
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return nsSVGImageFrameBase::GetFrameForPoint(aPoint);
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}
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nsIAtom *
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nsSVGImageFrame::GetType() const
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{
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return nsGkAtoms::svgImageFrame;
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}
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//----------------------------------------------------------------------
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// nsSVGPathGeometryFrame methods:
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// Lie about our fill/stroke so that covered region and hit detection work properly
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void
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nsSVGImageFrame::ReflowSVG()
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{
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NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
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"This call is probably a wasteful mistake");
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NS_ABORT_IF_FALSE(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"ReflowSVG mechanism not designed for this");
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if (!nsSVGUtils::NeedsReflowSVG(this)) {
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return;
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}
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gfxContext tmpCtx(gfxPlatform::GetPlatform()->ScreenReferenceSurface());
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// We'd like to just pass the identity matrix to GeneratePath, but if
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// this frame's user space size is _very_ large/small then the extents we
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// obtain below might have overflowed or otherwise be broken. This would
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// cause us to end up with a broken mRect and visual overflow rect and break
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// painting of this frame. This is particularly noticeable if the transforms
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// between us and our nsSVGOuterSVGFrame scale this frame to a reasonable
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// size. To avoid this we sadly have to do extra work to account for the
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// transforms between us and our nsSVGOuterSVGFrame, even though the
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// overwhelming number of SVGs will never have this problem.
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// XXX Will Azure eventually save us from having to do this?
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gfxSize scaleFactors = GetCanvasTM(FOR_OUTERSVG_TM).ScaleFactors(true);
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bool applyScaling = fabs(scaleFactors.width) >= 1e-6 &&
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fabs(scaleFactors.height) >= 1e-6;
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gfxMatrix scaling;
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if (applyScaling) {
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scaling.Scale(scaleFactors.width, scaleFactors.height);
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}
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tmpCtx.Save();
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GeneratePath(&tmpCtx, scaling);
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tmpCtx.Restore();
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gfxRect extent = tmpCtx.GetUserPathExtent();
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if (applyScaling) {
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extent.Scale(1 / scaleFactors.width, 1 / scaleFactors.height);
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}
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if (!extent.IsEmpty()) {
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mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent,
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PresContext()->AppUnitsPerCSSPixel());
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} else {
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mRect.SetEmpty();
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}
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if (mState & NS_FRAME_FIRST_REFLOW) {
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// Make sure we have our filter property (if any) before calling
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// FinishAndStoreOverflow (subsequent filter changes are handled off
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// nsChangeHint_UpdateEffects):
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nsSVGEffects::UpdateEffects(this);
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}
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nsRect overflow = nsRect(nsPoint(0,0), mRect.Size());
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nsOverflowAreas overflowAreas(overflow, overflow);
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FinishAndStoreOverflow(overflowAreas, mRect.Size());
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mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
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NS_FRAME_HAS_DIRTY_CHILDREN);
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// Invalidate, but only if this is not our first reflow (since if it is our
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// first reflow then we haven't had our first paint yet).
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if (!(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
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InvalidateFrame();
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}
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}
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uint16_t
|
|
nsSVGImageFrame::GetHitTestFlags()
|
|
{
|
|
uint16_t flags = 0;
|
|
|
|
switch(StyleVisibility()->mPointerEvents) {
|
|
case NS_STYLE_POINTER_EVENTS_NONE:
|
|
break;
|
|
case NS_STYLE_POINTER_EVENTS_VISIBLEPAINTED:
|
|
case NS_STYLE_POINTER_EVENTS_AUTO:
|
|
if (StyleVisibility()->IsVisible()) {
|
|
/* XXX: should check pixel transparency */
|
|
flags |= SVG_HIT_TEST_FILL;
|
|
}
|
|
break;
|
|
case NS_STYLE_POINTER_EVENTS_VISIBLEFILL:
|
|
case NS_STYLE_POINTER_EVENTS_VISIBLESTROKE:
|
|
case NS_STYLE_POINTER_EVENTS_VISIBLE:
|
|
if (StyleVisibility()->IsVisible()) {
|
|
flags |= SVG_HIT_TEST_FILL;
|
|
}
|
|
break;
|
|
case NS_STYLE_POINTER_EVENTS_PAINTED:
|
|
/* XXX: should check pixel transparency */
|
|
flags |= SVG_HIT_TEST_FILL;
|
|
break;
|
|
case NS_STYLE_POINTER_EVENTS_FILL:
|
|
case NS_STYLE_POINTER_EVENTS_STROKE:
|
|
case NS_STYLE_POINTER_EVENTS_ALL:
|
|
flags |= SVG_HIT_TEST_FILL;
|
|
break;
|
|
default:
|
|
NS_ERROR("not reached");
|
|
break;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsSVGImageListener implementation
|
|
|
|
NS_IMPL_ISUPPORTS1(nsSVGImageListener, imgINotificationObserver)
|
|
|
|
nsSVGImageListener::nsSVGImageListener(nsSVGImageFrame *aFrame) : mFrame(aFrame)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSVGImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
|
|
{
|
|
if (!mFrame)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
|
|
mFrame->InvalidateFrame();
|
|
nsSVGEffects::InvalidateRenderingObservers(mFrame);
|
|
nsSVGUtils::ScheduleReflowSVG(mFrame);
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::FRAME_UPDATE) {
|
|
// No new dimensions, so we don't need to call
|
|
// nsSVGUtils::InvalidateAndScheduleBoundsUpdate.
|
|
nsSVGEffects::InvalidateRenderingObservers(mFrame);
|
|
mFrame->InvalidateFrame();
|
|
}
|
|
|
|
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
|
|
// Called once the resource's dimensions have been obtained.
|
|
aRequest->GetImage(getter_AddRefs(mFrame->mImageContainer));
|
|
mFrame->InvalidateFrame();
|
|
nsSVGEffects::InvalidateRenderingObservers(mFrame);
|
|
nsSVGUtils::ScheduleReflowSVG(mFrame);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|