gecko-dev/dom/svg/SVGFEImageElement.cpp

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/* -*- 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/EventStates.h"
#include "mozilla/dom/SVGFEImageElementBinding.h"
#include "mozilla/dom/SVGFilterElement.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/RefPtr.h"
#include "nsContentUtils.h"
#include "nsLayoutUtils.h"
#include "nsSVGUtils.h"
#include "nsNetUtil.h"
#include "imgIContainer.h"
#include "gfx2DGlue.h"
NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(FEImage)
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
JSObject*
SVGFEImageElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGFEImageElementBinding::Wrap(aCx, this, aGivenProto);
}
nsSVGElement::StringInfo SVGFEImageElement::sStringInfo[2] =
{
{ &nsGkAtoms::result, kNameSpaceID_None, true },
{ &nsGkAtoms::href, kNameSpaceID_XLink, true }
};
//----------------------------------------------------------------------
// nsISupports methods
NS_IMPL_ISUPPORTS_INHERITED(SVGFEImageElement, SVGFEImageElementBase,
nsIDOMNode, nsIDOMElement, nsIDOMSVGElement,
imgINotificationObserver, nsIImageLoadingContent,
imgIOnloadBlocker)
//----------------------------------------------------------------------
// Implementation
SVGFEImageElement::SVGFEImageElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGFEImageElementBase(aNodeInfo)
{
// We start out broken
AddStatesSilently(NS_EVENT_STATE_BROKEN);
}
SVGFEImageElement::~SVGFEImageElement()
{
DestroyImageLoadingContent();
}
//----------------------------------------------------------------------
nsresult
SVGFEImageElement::LoadSVGImage(bool aForce, bool aNotify)
{
// resolve href attribute
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
nsAutoString href;
mStringAttributes[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
nsIDocument* 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;
}
}
return LoadImage(href, aForce, aNotify, eImageLoadType_Normal);
}
//----------------------------------------------------------------------
// nsIContent methods:
NS_IMETHODIMP_(bool)
SVGFEImageElement::IsAttributeMapped(const nsIAtom* name) const
{
static const MappedAttributeEntry* const map[] = {
sGraphicsMap
};
return FindAttributeDependence(name, map) ||
SVGFEImageElementBase::IsAttributeMapped(name);
}
nsresult
SVGFEImageElement::AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValue* aValue, bool aNotify)
{
if (aNamespaceID == kNameSpaceID_XLink && aName == nsGkAtoms::href) {
// If there isn't a frame we still need to load the image in case
// the frame is created later e.g. by attaching to a document.
// If there is a frame then it should deal with loading as the image
// url may be animated.
if (!GetPrimaryFrame()) {
if (aValue) {
LoadSVGImage(true, aNotify);
} else {
CancelImageRequests(aNotify);
}
}
}
return SVGFEImageElementBase::AfterSetAttr(aNamespaceID, aName,
aValue, aNotify);
}
void
SVGFEImageElement::MaybeLoadSVGImage()
{
if (mStringAttributes[HREF].IsExplicitlySet() &&
(NS_FAILED(LoadSVGImage(false, true)) ||
!LoadingEnabled())) {
CancelImageRequests(true);
}
}
nsresult
SVGFEImageElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
nsresult rv = SVGFEImageElementBase::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
nsImageLoadingContent::BindToTree(aDocument, aParent, aBindingParent,
aCompileEventHandlers);
if (mStringAttributes[HREF].IsExplicitlySet()) {
// FIXME: Bug 660963 it would be nice if we could just have
// ClearBrokenState update our state and do it fast...
ClearBrokenState();
RemoveStatesSilently(NS_EVENT_STATE_BROKEN);
nsContentUtils::AddScriptRunner(
NS_NewRunnableMethod(this, &SVGFEImageElement::MaybeLoadSVGImage));
}
return rv;
}
void
SVGFEImageElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
nsImageLoadingContent::UnbindFromTree(aDeep, aNullParent);
SVGFEImageElementBase::UnbindFromTree(aDeep, aNullParent);
}
EventStates
SVGFEImageElement::IntrinsicState() const
{
return SVGFEImageElementBase::IntrinsicState() |
nsImageLoadingContent::ImageState();
}
//----------------------------------------------------------------------
// nsIDOMNode methods
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEImageElement)
already_AddRefed<SVGAnimatedString>
SVGFEImageElement::Href()
{
return mStringAttributes[HREF].ToDOMAnimatedString(this);
}
//----------------------------------------------------------------------
// nsIDOMSVGFEImageElement methods
FilterPrimitiveDescription
SVGFEImageElement::GetPrimitiveDescription(nsSVGFilterInstance* aInstance,
const IntRect& aFilterSubregion,
const nsTArray<bool>& aInputsAreTainted,
nsTArray<RefPtr<SourceSurface>>& aInputImages)
{
nsIFrame* frame = GetPrimaryFrame();
if (!frame) {
return FilterPrimitiveDescription(PrimitiveType::Empty);
}
nsCOMPtr<imgIRequest> currentRequest;
GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(currentRequest));
nsCOMPtr<imgIContainer> imageContainer;
if (currentRequest) {
currentRequest->GetImage(getter_AddRefs(imageContainer));
}
RefPtr<SourceSurface> image;
if (imageContainer) {
image = imageContainer->GetFrame(imgIContainer::FRAME_CURRENT,
imgIContainer::FLAG_SYNC_DECODE);
}
if (!image) {
return FilterPrimitiveDescription(PrimitiveType::Empty);
}
IntSize nativeSize;
imageContainer->GetWidth(&nativeSize.width);
imageContainer->GetHeight(&nativeSize.height);
Matrix viewBoxTM =
SVGContentUtils::GetViewBoxTransform(aFilterSubregion.width, aFilterSubregion.height,
0, 0, nativeSize.width, nativeSize.height,
mPreserveAspectRatio);
Matrix TM = viewBoxTM;
TM.PostTranslate(aFilterSubregion.x, aFilterSubregion.y);
Filter filter = nsLayoutUtils::GetGraphicsFilterForFrame(frame);
FilterPrimitiveDescription descr(PrimitiveType::Image);
descr.Attributes().Set(eImageFilter, (uint32_t)filter);
descr.Attributes().Set(eImageTransform, TM);
// Append the image to aInputImages and store its index in the description.
size_t imageIndex = aInputImages.Length();
aInputImages.AppendElement(image);
descr.Attributes().Set(eImageInputIndex, (uint32_t)imageIndex);
return descr;
}
bool
SVGFEImageElement::AttributeAffectsRendering(int32_t aNameSpaceID,
nsIAtom* 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;
}
uint32_t status;
currentRequest->GetImageStatus(&status);
if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
// The load has not completed yet.
return false;
}
nsCOMPtr<nsIPrincipal> principal;
rv = currentRequest->GetImagePrincipal(getter_AddRefs(principal));
if (NS_FAILED(rv) || !principal) {
return true;
}
int32_t corsmode;
if (NS_SUCCEEDED(currentRequest->GetCORSMode(&corsmode)) &&
corsmode != imgIRequest::CORS_NONE) {
// If CORS was used to load the image, the page is allowed to read from it.
return false;
}
if (aReferencePrincipal->Subsumes(principal)) {
// The page is allowed to read from the image.
return false;
}
return true;
}
//----------------------------------------------------------------------
// nsSVGElement methods
already_AddRefed<DOMSVGAnimatedPreserveAspectRatio>
SVGFEImageElement::PreserveAspectRatio()
{
return mPreserveAspectRatio.ToDOMAnimatedPreserveAspectRatio(this);
}
SVGAnimatedPreserveAspectRatio *
SVGFEImageElement::GetPreserveAspectRatio()
{
return &mPreserveAspectRatio;
}
nsSVGElement::StringAttributesInfo
SVGFEImageElement::GetStringInfo()
{
return StringAttributesInfo(mStringAttributes, sStringInfo,
ArrayLength(sStringInfo));
}
//----------------------------------------------------------------------
// imgINotificationObserver methods
NS_IMETHODIMP
SVGFEImageElement::Notify(imgIRequest* aRequest, int32_t aType, const nsIntRect* aData)
{
nsresult rv = 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();
}
if (aType == imgINotificationObserver::LOAD_COMPLETE ||
aType == imgINotificationObserver::FRAME_UPDATE ||
aType == imgINotificationObserver::SIZE_AVAILABLE) {
Invalidate();
}
return rv;
}
//----------------------------------------------------------------------
// helper methods
void
SVGFEImageElement::Invalidate()
{
if (GetParent() && GetParent()->IsSVGElement(nsGkAtoms::filter)) {
static_cast<SVGFilterElement*>(GetParent())->Invalidate();
}
}
} // namespace dom
} // namespace mozilla