diff options
Diffstat (limited to 'dom/svg/SVGFEImageElement.cpp')
| -rw-r--r-- | dom/svg/SVGFEImageElement.cpp | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/dom/svg/SVGFEImageElement.cpp b/dom/svg/SVGFEImageElement.cpp new file mode 100644 index 0000000000..acf1f821f5 --- /dev/null +++ b/dom/svg/SVGFEImageElement.cpp @@ -0,0 +1,374 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/dom/SVGFEImageElement.h" + +#include "mozilla/SVGObserverUtils.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/BindContext.h" +#include "mozilla/dom/SVGFEImageElementBinding.h" +#include "mozilla/dom/SVGFilterElement.h" +#include "mozilla/dom/UserActivation.h" +#include "mozilla/gfx/2D.h" +#include "mozilla/RefPtr.h" +#include "nsContentUtils.h" +#include "nsLayoutUtils.h" +#include "nsNetUtil.h" +#include "imgIContainer.h" +#include "gfx2DGlue.h" + +NS_IMPL_NS_NEW_SVG_ELEMENT(FEImage) + +using namespace mozilla::gfx; + +namespace mozilla::dom { + +JSObject* SVGFEImageElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return SVGFEImageElement_Binding::Wrap(aCx, this, aGivenProto); +} + +SVGElement::StringInfo SVGFEImageElement::sStringInfo[3] = { + {nsGkAtoms::result, kNameSpaceID_None, true}, + {nsGkAtoms::href, kNameSpaceID_None, true}, + {nsGkAtoms::href, kNameSpaceID_XLink, true}}; + +//---------------------------------------------------------------------- +// nsISupports methods + +NS_IMPL_ISUPPORTS_INHERITED(SVGFEImageElement, SVGFEImageElementBase, + imgINotificationObserver, nsIImageLoadingContent) + +//---------------------------------------------------------------------- +// Implementation + +SVGFEImageElement::SVGFEImageElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) + : SVGFEImageElementBase(std::move(aNodeInfo)), mImageAnimationMode(0) { + // We start out broken + AddStatesSilently(ElementState::BROKEN); +} + +SVGFEImageElement::~SVGFEImageElement() { nsImageLoadingContent::Destroy(); } + +//---------------------------------------------------------------------- + +nsresult SVGFEImageElement::LoadSVGImage(bool aForce, bool aNotify) { + // resolve href attribute + nsIURI* baseURI = GetBaseURI(); + + nsAutoString href; + if (mStringAttributes[HREF].IsExplicitlySet()) { + mStringAttributes[HREF].GetAnimValue(href, this); + } else { + mStringAttributes[XLINK_HREF].GetAnimValue(href, this); + } + href.Trim(" \t\n\r"); + + if (baseURI && !href.IsEmpty()) NS_MakeAbsoluteURI(href, href, baseURI); + + // Make sure we don't get in a recursive death-spiral + Document* doc = OwnerDoc(); + nsCOMPtr<nsIURI> hrefAsURI; + if (NS_SUCCEEDED(StringToURI(href, doc, getter_AddRefs(hrefAsURI)))) { + bool isEqual; + if (NS_SUCCEEDED(hrefAsURI->Equals(baseURI, &isEqual)) && isEqual) { + // Image URI matches our URI exactly! Bail out. + return NS_OK; + } + } + + // Mark channel as urgent-start before load image if the image load is + // initaiated by a user interaction. + mUseUrgentStartForChannel = UserActivation::IsHandlingUserInput(); + return LoadImage(href, aForce, aNotify, eImageLoadType_Normal); +} + +bool SVGFEImageElement::ShouldLoadImage() const { + return LoadingEnabled() && OwnerDoc()->ShouldLoadImages(); +} + +//---------------------------------------------------------------------- +// EventTarget methods: + +void SVGFEImageElement::AsyncEventRunning(AsyncEventDispatcher* aEvent) { + nsImageLoadingContent::AsyncEventRunning(aEvent); +} + +//---------------------------------------------------------------------- +// nsIContent methods: + +bool SVGFEImageElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute, + const nsAString& aValue, + nsIPrincipal* aMaybeScriptedPrincipal, + nsAttrValue& aResult) { + if (aNamespaceID == kNameSpaceID_None && + aAttribute == nsGkAtoms::crossorigin) { + ParseCORSValue(aValue, aResult); + return true; + } + return SVGFEImageElementBase::ParseAttribute( + aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult); +} + +void SVGFEImageElement::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName, + const nsAttrValue* aValue, + const nsAttrValue* aOldValue, + nsIPrincipal* aSubjectPrincipal, + bool aNotify) { + if (aName == nsGkAtoms::href && (aNamespaceID == kNameSpaceID_XLink || + aNamespaceID == kNameSpaceID_None)) { + if (aValue) { + if (ShouldLoadImage()) { + LoadSVGImage(true, aNotify); + } + } else { + CancelImageRequests(aNotify); + } + } else if (aNamespaceID == kNameSpaceID_None && + aName == nsGkAtoms::crossorigin) { + if (aNotify && GetCORSMode() != AttrValueToCORSMode(aOldValue) && + ShouldLoadImage()) { + ForceReload(aNotify, IgnoreErrors()); + } + } + + return SVGFEImageElementBase::AfterSetAttr( + aNamespaceID, aName, aValue, aOldValue, aSubjectPrincipal, aNotify); +} + +void SVGFEImageElement::MaybeLoadSVGImage() { + if ((mStringAttributes[HREF].IsExplicitlySet() || + mStringAttributes[XLINK_HREF].IsExplicitlySet()) && + (NS_FAILED(LoadSVGImage(false, true)) || !LoadingEnabled())) { + CancelImageRequests(true); + } +} + +nsresult SVGFEImageElement::BindToTree(BindContext& aContext, + nsINode& aParent) { + nsresult rv = SVGFEImageElementBase::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + + nsImageLoadingContent::BindToTree(aContext, aParent); + + if ((mStringAttributes[HREF].IsExplicitlySet() || + mStringAttributes[XLINK_HREF].IsExplicitlySet()) && + ShouldLoadImage()) { + nsContentUtils::AddScriptRunner( + NewRunnableMethod("dom::SVGFEImageElement::MaybeLoadSVGImage", this, + &SVGFEImageElement::MaybeLoadSVGImage)); + } + + if (aContext.InComposedDoc()) { + aContext.OwnerDoc().SetUseCounter(eUseCounter_custom_feImage); + } + + return rv; +} + +void SVGFEImageElement::UnbindFromTree(bool aNullParent) { + nsImageLoadingContent::UnbindFromTree(aNullParent); + SVGFEImageElementBase::UnbindFromTree(aNullParent); +} + +void SVGFEImageElement::DestroyContent() { + nsImageLoadingContent::Destroy(); + SVGFEImageElementBase::DestroyContent(); +} + +//---------------------------------------------------------------------- +// nsINode methods + +NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEImageElement) + +already_AddRefed<DOMSVGAnimatedString> SVGFEImageElement::Href() { + return mStringAttributes[HREF].IsExplicitlySet() + ? mStringAttributes[HREF].ToDOMAnimatedString(this) + : mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this); +} + +//---------------------------------------------------------------------- +// nsImageLoadingContent methods: + +CORSMode SVGFEImageElement::GetCORSMode() { + return AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin)); +} + +//---------------------------------------------------------------------- +// nsIDOMSVGFEImageElement methods + +FilterPrimitiveDescription SVGFEImageElement::GetPrimitiveDescription( + SVGFilterInstance* aInstance, const IntRect& aFilterSubregion, + const nsTArray<bool>& aInputsAreTainted, + nsTArray<RefPtr<SourceSurface>>& aInputImages) { + nsIFrame* frame = GetPrimaryFrame(); + if (!frame) { + return FilterPrimitiveDescription(); + } + + nsCOMPtr<imgIRequest> currentRequest; + GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, + getter_AddRefs(currentRequest)); + + nsCOMPtr<imgIContainer> imageContainer; + if (currentRequest) { + currentRequest->GetImage(getter_AddRefs(imageContainer)); + } + + RefPtr<SourceSurface> image; + nsIntSize nativeSize; + if (imageContainer) { + if (NS_FAILED(imageContainer->GetWidth(&nativeSize.width))) { + nativeSize.width = kFallbackIntrinsicWidthInPixels; + } + if (NS_FAILED(imageContainer->GetHeight(&nativeSize.height))) { + nativeSize.height = kFallbackIntrinsicHeightInPixels; + } + uint32_t flags = + imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY; + image = imageContainer->GetFrameAtSize(nativeSize, + imgIContainer::FRAME_CURRENT, flags); + } + + if (!image) { + return FilterPrimitiveDescription(); + } + + Matrix viewBoxTM = SVGContentUtils::GetViewBoxTransform( + aFilterSubregion.width, aFilterSubregion.height, 0, 0, nativeSize.width, + nativeSize.height, mPreserveAspectRatio); + Matrix TM = viewBoxTM; + TM.PostTranslate(aFilterSubregion.x, aFilterSubregion.y); + + SamplingFilter samplingFilter = + nsLayoutUtils::GetSamplingFilterForFrame(frame); + + ImageAttributes atts; + atts.mFilter = (uint32_t)samplingFilter; + atts.mTransform = TM; + + // Append the image to aInputImages and store its index in the description. + size_t imageIndex = aInputImages.Length(); + aInputImages.AppendElement(image); + atts.mInputIndex = (uint32_t)imageIndex; + return FilterPrimitiveDescription(AsVariant(std::move(atts))); +} + +bool SVGFEImageElement::AttributeAffectsRendering(int32_t aNameSpaceID, + nsAtom* aAttribute) const { + // nsGkAtoms::href is deliberately omitted as the frame has special + // handling to load the image + return SVGFEImageElementBase::AttributeAffectsRendering(aNameSpaceID, + aAttribute) || + (aNameSpaceID == kNameSpaceID_None && + aAttribute == nsGkAtoms::preserveAspectRatio); +} + +bool SVGFEImageElement::OutputIsTainted(const nsTArray<bool>& aInputsAreTainted, + nsIPrincipal* aReferencePrincipal) { + nsresult rv; + nsCOMPtr<imgIRequest> currentRequest; + GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, + getter_AddRefs(currentRequest)); + + if (!currentRequest) { + return false; + } + + nsCOMPtr<nsIPrincipal> principal; + rv = currentRequest->GetImagePrincipal(getter_AddRefs(principal)); + if (NS_FAILED(rv) || !principal) { + return true; + } + + // If CORS was used to load the image, the page is allowed to read from it. + if (nsLayoutUtils::ImageRequestUsesCORS(currentRequest)) { + return false; + } + + if (aReferencePrincipal->Subsumes(principal)) { + // The page is allowed to read from the image. + return false; + } + + return true; +} + +//---------------------------------------------------------------------- +// SVGElement methods + +already_AddRefed<DOMSVGAnimatedPreserveAspectRatio> +SVGFEImageElement::PreserveAspectRatio() { + return mPreserveAspectRatio.ToDOMAnimatedPreserveAspectRatio(this); +} + +SVGAnimatedPreserveAspectRatio* +SVGFEImageElement::GetAnimatedPreserveAspectRatio() { + return &mPreserveAspectRatio; +} + +SVGElement::StringAttributesInfo SVGFEImageElement::GetStringInfo() { + return StringAttributesInfo(mStringAttributes, sStringInfo, + ArrayLength(sStringInfo)); +} + +//---------------------------------------------------------------------- +// nsIImageLoadingContent methods +NS_IMETHODIMP_(void) +SVGFEImageElement::FrameCreated(nsIFrame* aFrame) { + nsImageLoadingContent::FrameCreated(aFrame); + + uint64_t mode = aFrame->PresContext()->ImageAnimationMode(); + if (mode == mImageAnimationMode) { + return; + } + + mImageAnimationMode = mode; + + if (mPendingRequest) { + nsCOMPtr<imgIContainer> container; + mPendingRequest->GetImage(getter_AddRefs(container)); + if (container) { + container->SetAnimationMode(mode); + } + } + + if (mCurrentRequest) { + nsCOMPtr<imgIContainer> container; + mCurrentRequest->GetImage(getter_AddRefs(container)); + if (container) { + container->SetAnimationMode(mode); + } + } +} + +//---------------------------------------------------------------------- +// imgINotificationObserver methods + +void SVGFEImageElement::Notify(imgIRequest* aRequest, int32_t aType, + const nsIntRect* aData) { + nsImageLoadingContent::Notify(aRequest, aType, aData); + + if (aType == imgINotificationObserver::SIZE_AVAILABLE) { + // Request a decode + nsCOMPtr<imgIContainer> container; + aRequest->GetImage(getter_AddRefs(container)); + MOZ_ASSERT(container, "who sent the notification then?"); + container->StartDecoding(imgIContainer::FLAG_NONE); + container->SetAnimationMode(mImageAnimationMode); + } + + if (aType == imgINotificationObserver::LOAD_COMPLETE || + aType == imgINotificationObserver::FRAME_UPDATE || + aType == imgINotificationObserver::SIZE_AVAILABLE) { + if (auto* filter = SVGFilterElement::FromNodeOrNull(GetParent())) { + SVGObserverUtils::InvalidateDirectRenderingObservers(filter); + } + } +} + +} // namespace mozilla::dom |