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gecko-dev/image/VectorImage.cpp
Timothy Nikkel 732e327254 Bug 1880054. Simplify some imagelib event target code. r=gfx-reviewers,lsalzman 
This code was added before we decided to do fission, when we wanted to separate out different sites that were in the same process so we could prioritize them better. We are not going down that path so we can simplify this code. There should be no change in functionality with this patch, just simpler code.

Differential Revision: https://phabricator.services.mozilla.com/D201705
2024-02-25 04:54:33 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "VectorImage.h"
#include "AutoRestoreSVGState.h"
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "gfxDrawable.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "imgFrame.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/MediaFeatureChange.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/SVGSVGElement.h"
#include "mozilla/dom/SVGDocument.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/PresShell.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/RefPtr.h"
#include "mozilla/StaticPrefs_image.h"
#include "mozilla/SVGObserverUtils.h" // for SVGRenderingObserver
#include "mozilla/SVGUtils.h"
#include "nsIStreamListener.h"
#include "nsMimeTypes.h"
#include "nsPresContext.h"
#include "nsRect.h"
#include "nsString.h"
#include "nsStubDocumentObserver.h"
#include "nsWindowSizes.h"
#include "ImageRegion.h"
#include "ISurfaceProvider.h"
#include "LookupResult.h"
#include "Orientation.h"
#include "SVGDocumentWrapper.h"
#include "SVGDrawingCallback.h"
#include "SVGDrawingParameters.h"
#include "nsIDOMEventListener.h"
#include "SurfaceCache.h"
#include "BlobSurfaceProvider.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/image/Resolution.h"
#include "WindowRenderer.h"
namespace mozilla {
using namespace dom;
using namespace dom::SVGPreserveAspectRatio_Binding;
using namespace gfx;
using namespace layers;
namespace image {
// Helper-class: SVGRootRenderingObserver
class SVGRootRenderingObserver final : public SVGRenderingObserver {
public:
NS_DECL_ISUPPORTS
SVGRootRenderingObserver(SVGDocumentWrapper* aDocWrapper,
VectorImage* aVectorImage)
: mDocWrapper(aDocWrapper),
mVectorImage(aVectorImage),
mHonoringInvalidations(true) {
MOZ_ASSERT(mDocWrapper, "Need a non-null SVG document wrapper");
MOZ_ASSERT(mVectorImage, "Need a non-null VectorImage");
StartObserving();
Element* elem = GetReferencedElementWithoutObserving();
MOZ_ASSERT(elem, "no root SVG node for us to observe");
SVGObserverUtils::AddRenderingObserver(elem, this);
mInObserverSet = true;
}
void ResumeHonoringInvalidations() { mHonoringInvalidations = true; }
protected:
virtual ~SVGRootRenderingObserver() {
// This needs to call our GetReferencedElementWithoutObserving override,
// so must be called here rather than in our base class's dtor.
StopObserving();
}
Element* GetReferencedElementWithoutObserving() final {
return mDocWrapper->GetRootSVGElem();
}
virtual void OnRenderingChange() override {
Element* elem = GetReferencedElementWithoutObserving();
MOZ_ASSERT(elem, "missing root SVG node");
if (mHonoringInvalidations && !mDocWrapper->ShouldIgnoreInvalidation()) {
nsIFrame* frame = elem->GetPrimaryFrame();
if (!frame || frame->PresShell()->IsDestroying()) {
// We're being destroyed. Bail out.
return;
}
// Ignore further invalidations until we draw.
mHonoringInvalidations = false;
mVectorImage->InvalidateObserversOnNextRefreshDriverTick();
}
// Our caller might've removed us from rendering-observer list.
// Add ourselves back!
if (!mInObserverSet) {
SVGObserverUtils::AddRenderingObserver(elem, this);
mInObserverSet = true;
}
}
// Private data
const RefPtr<SVGDocumentWrapper> mDocWrapper;
VectorImage* const mVectorImage; // Raw pointer because it owns me.
bool mHonoringInvalidations;
};
NS_IMPL_ISUPPORTS(SVGRootRenderingObserver, nsIMutationObserver)
class SVGParseCompleteListener final : public nsStubDocumentObserver {
public:
NS_DECL_ISUPPORTS
SVGParseCompleteListener(SVGDocument* aDocument, VectorImage* aImage)
: mDocument(aDocument), mImage(aImage) {
MOZ_ASSERT(mDocument, "Need an SVG document");
MOZ_ASSERT(mImage, "Need an image");
mDocument->AddObserver(this);
}
private:
~SVGParseCompleteListener() {
if (mDocument) {
// The document must have been destroyed before we got our event.
// Otherwise this can't happen, since documents hold strong references to
// their observers.
Cancel();
}
}
public:
void EndLoad(Document* aDocument) override {
MOZ_ASSERT(aDocument == mDocument, "Got EndLoad for wrong document?");
// OnSVGDocumentParsed will release our owner's reference to us, so ensure
// we stick around long enough to complete our work.
RefPtr<SVGParseCompleteListener> kungFuDeathGrip(this);
mImage->OnSVGDocumentParsed();
}
void Cancel() {
MOZ_ASSERT(mDocument, "Duplicate call to Cancel");
if (mDocument) {
mDocument->RemoveObserver(this);
mDocument = nullptr;
}
}
private:
RefPtr<SVGDocument> mDocument;
VectorImage* const mImage; // Raw pointer to owner.
};
NS_IMPL_ISUPPORTS(SVGParseCompleteListener, nsIDocumentObserver)
class SVGLoadEventListener final : public nsIDOMEventListener {
public:
NS_DECL_ISUPPORTS
SVGLoadEventListener(Document* aDocument, VectorImage* aImage)
: mDocument(aDocument), mImage(aImage) {
MOZ_ASSERT(mDocument, "Need an SVG document");
MOZ_ASSERT(mImage, "Need an image");
mDocument->AddEventListener(u"MozSVGAsImageDocumentLoad"_ns, this, true,
false);
}
private:
~SVGLoadEventListener() {
if (mDocument) {
// The document must have been destroyed before we got our event.
// Otherwise this can't happen, since documents hold strong references to
// their observers.
Cancel();
}
}
public:
NS_IMETHOD HandleEvent(Event* aEvent) override {
MOZ_ASSERT(mDocument, "Need an SVG document. Received multiple events?");
// OnSVGDocumentLoaded will release our owner's reference
// to us, so ensure we stick around long enough to complete our work.
RefPtr<SVGLoadEventListener> kungFuDeathGrip(this);
#ifdef DEBUG
nsAutoString eventType;
aEvent->GetType(eventType);
MOZ_ASSERT(eventType.EqualsLiteral("MozSVGAsImageDocumentLoad"),
"Received unexpected event");
#endif
mImage->OnSVGDocumentLoaded();
return NS_OK;
}
void Cancel() {
MOZ_ASSERT(mDocument, "Duplicate call to Cancel");
if (mDocument) {
mDocument->RemoveEventListener(u"MozSVGAsImageDocumentLoad"_ns, this,
true);
mDocument = nullptr;
}
}
private:
nsCOMPtr<Document> mDocument;
VectorImage* const mImage; // Raw pointer to owner.
};
NS_IMPL_ISUPPORTS(SVGLoadEventListener, nsIDOMEventListener)
SVGDrawingCallback::SVGDrawingCallback(SVGDocumentWrapper* aSVGDocumentWrapper,
const IntSize& aViewportSize,
const IntSize& aSize,
uint32_t aImageFlags)
: mSVGDocumentWrapper(aSVGDocumentWrapper),
mViewportSize(aViewportSize),
mSize(aSize),
mImageFlags(aImageFlags) {}
SVGDrawingCallback::~SVGDrawingCallback() = default;
// Based loosely on SVGIntegrationUtils' PaintFrameCallback::operator()
bool SVGDrawingCallback::operator()(gfxContext* aContext,
const gfxRect& aFillRect,
const SamplingFilter aSamplingFilter,
const gfxMatrix& aTransform) {
MOZ_ASSERT(mSVGDocumentWrapper, "need an SVGDocumentWrapper");
// Get (& sanity-check) the helper-doc's presShell
RefPtr<PresShell> presShell = mSVGDocumentWrapper->GetPresShell();
MOZ_ASSERT(presShell, "GetPresShell returned null for an SVG image?");
Document* doc = presShell->GetDocument();
[[maybe_unused]] nsIURI* uri = doc ? doc->GetDocumentURI() : nullptr;
AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING(
"SVG Image drawing", GRAPHICS,
nsPrintfCString("%dx%d %s", mSize.width, mSize.height,
uri ? uri->GetSpecOrDefault().get() : "N/A"));
gfxContextAutoSaveRestore contextRestorer(aContext);
// Clip to aFillRect so that we don't paint outside.
aContext->Clip(aFillRect);
gfxMatrix matrix = aTransform;
if (!matrix.Invert()) {
return false;
}
aContext->SetMatrixDouble(
aContext->CurrentMatrixDouble().PreMultiply(matrix).PreScale(
double(mSize.width) / mViewportSize.width,
double(mSize.height) / mViewportSize.height));
nsPresContext* presContext = presShell->GetPresContext();
MOZ_ASSERT(presContext, "pres shell w/out pres context");
nsRect svgRect(0, 0, presContext->DevPixelsToAppUnits(mViewportSize.width),
presContext->DevPixelsToAppUnits(mViewportSize.height));
RenderDocumentFlags renderDocFlags =
RenderDocumentFlags::IgnoreViewportScrolling;
if (!(mImageFlags & imgIContainer::FLAG_SYNC_DECODE)) {
renderDocFlags |= RenderDocumentFlags::AsyncDecodeImages;
}
if (mImageFlags & imgIContainer::FLAG_HIGH_QUALITY_SCALING) {
renderDocFlags |= RenderDocumentFlags::UseHighQualityScaling;
}
presShell->RenderDocument(svgRect, renderDocFlags,
NS_RGBA(0, 0, 0, 0), // transparent
aContext);
return true;
}
// Implement VectorImage's nsISupports-inherited methods
NS_IMPL_ISUPPORTS(VectorImage, imgIContainer, nsIStreamListener,
nsIRequestObserver)
//------------------------------------------------------------------------------
// Constructor / Destructor
VectorImage::VectorImage(nsIURI* aURI /* = nullptr */)
: ImageResource(aURI), // invoke superclass's constructor
mLockCount(0),
mIsInitialized(false),
mDiscardable(false),
mIsFullyLoaded(false),
mHaveAnimations(false),
mHasPendingInvalidation(false) {}
VectorImage::~VectorImage() {
ReportDocumentUseCounters();
CancelAllListeners();
SurfaceCache::RemoveImage(ImageKey(this));
}
//------------------------------------------------------------------------------
// Methods inherited from Image.h
nsresult VectorImage::Init(const char* aMimeType, uint32_t aFlags) {
// We don't support re-initialization
if (mIsInitialized) {
return NS_ERROR_ILLEGAL_VALUE;
}
MOZ_ASSERT(!mIsFullyLoaded && !mHaveAnimations && !mError,
"Flags unexpectedly set before initialization");
MOZ_ASSERT(!strcmp(aMimeType, IMAGE_SVG_XML), "Unexpected mimetype");
mDiscardable = !!(aFlags & INIT_FLAG_DISCARDABLE);
// Lock this image's surfaces in the SurfaceCache if we're not discardable.
if (!mDiscardable) {
mLockCount++;
SurfaceCache::LockImage(ImageKey(this));
}
mIsInitialized = true;
return NS_OK;
}
size_t VectorImage::SizeOfSourceWithComputedFallback(
SizeOfState& aState) const {
if (!mSVGDocumentWrapper) {
return 0; // No document, so no memory used for the document.
}
SVGDocument* doc = mSVGDocumentWrapper->GetDocument();
if (!doc) {
return 0; // No document, so no memory used for the document.
}
nsWindowSizes windowSizes(aState);
doc->DocAddSizeOfIncludingThis(windowSizes);
if (windowSizes.getTotalSize() == 0) {
// MallocSizeOf fails on this platform. Because we also use this method for
// determining the size of cache entries, we need to return something
// reasonable here. Unfortunately, there's no way to estimate the document's
// size accurately, so we just use a constant value of 100KB, which will
// generally underestimate the true size.
return 100 * 1024;
}
return windowSizes.getTotalSize();
}
nsresult VectorImage::OnImageDataComplete(nsIRequest* aRequest,
nsresult aStatus, bool aLastPart) {
// Call our internal OnStopRequest method, which only talks to our embedded
// SVG document. This won't have any effect on our ProgressTracker.
nsresult finalStatus = OnStopRequest(aRequest, aStatus);
// Give precedence to Necko failure codes.
if (NS_FAILED(aStatus)) {
finalStatus = aStatus;
}
Progress loadProgress = LoadCompleteProgress(aLastPart, mError, finalStatus);
if (mIsFullyLoaded || mError) {
// Our document is loaded, so we're ready to notify now.
mProgressTracker->SyncNotifyProgress(loadProgress);
} else {
// Record our progress so far; we'll actually send the notifications in
// OnSVGDocumentLoaded or OnSVGDocumentError.
mLoadProgress = Some(loadProgress);
}
return finalStatus;
}
nsresult VectorImage::OnImageDataAvailable(nsIRequest* aRequest,
nsIInputStream* aInStr,
uint64_t aSourceOffset,
uint32_t aCount) {
return OnDataAvailable(aRequest, aInStr, aSourceOffset, aCount);
}
nsresult VectorImage::StartAnimation() {
if (mError) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(ShouldAnimate(), "Should not animate!");
mSVGDocumentWrapper->StartAnimation();
return NS_OK;
}
nsresult VectorImage::StopAnimation() {
nsresult rv = NS_OK;
if (mError) {
rv = NS_ERROR_FAILURE;
} else {
MOZ_ASSERT(mIsFullyLoaded && mHaveAnimations,
"Should not have been animating!");
mSVGDocumentWrapper->StopAnimation();
}
mAnimating = false;
return rv;
}
bool VectorImage::ShouldAnimate() {
return ImageResource::ShouldAnimate() && mIsFullyLoaded && mHaveAnimations;
}
NS_IMETHODIMP_(void)
VectorImage::SetAnimationStartTime(const TimeStamp& aTime) {
// We don't care about animation start time.
}
//------------------------------------------------------------------------------
// imgIContainer methods
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetWidth(int32_t* aWidth) {
if (mError || !mIsFullyLoaded) {
// XXXdholbert Technically we should leave outparam untouched when we
// fail. But since many callers don't check for failure, we set it to 0 on
// failure, for sane/predictable results.
*aWidth = 0;
return NS_ERROR_FAILURE;
}
SVGSVGElement* rootElem = mSVGDocumentWrapper->GetRootSVGElem();
MOZ_ASSERT(rootElem,
"Should have a root SVG elem, since we finished "
"loading without errors");
LengthPercentage rootElemWidth = rootElem->GetIntrinsicWidth();
if (!rootElemWidth.IsLength()) {
*aWidth = 0;
return NS_ERROR_FAILURE;
}
*aWidth = SVGUtils::ClampToInt(rootElemWidth.AsLength().ToCSSPixels());
return NS_OK;
}
//******************************************************************************
nsresult VectorImage::GetNativeSizes(nsTArray<IntSize>& aNativeSizes) {
return NS_ERROR_NOT_IMPLEMENTED;
}
//******************************************************************************
size_t VectorImage::GetNativeSizesLength() { return 0; }
//******************************************************************************
NS_IMETHODIMP_(void)
VectorImage::RequestRefresh(const TimeStamp& aTime) {
if (HadRecentRefresh(aTime)) {
return;
}
Document* doc = mSVGDocumentWrapper->GetDocument();
if (!doc) {
// We are racing between shutdown and a refresh.
return;
}
EvaluateAnimation();
mSVGDocumentWrapper->TickRefreshDriver();
if (mHasPendingInvalidation) {
SendInvalidationNotifications();
}
}
void VectorImage::SendInvalidationNotifications() {
// Animated images don't send out invalidation notifications as soon as
// they're generated. Instead, InvalidateObserversOnNextRefreshDriverTick
// records that there are pending invalidations and then returns immediately.
// The notifications are actually sent from RequestRefresh(). We send these
// notifications there to ensure that there is actually a document observing
// us. Otherwise, the notifications are just wasted effort.
//
// Non-animated images post an event to call this method from
// InvalidateObserversOnNextRefreshDriverTick, because RequestRefresh is never
// called for them. Ordinarily this isn't needed, since we send out
// invalidation notifications in OnSVGDocumentLoaded, but in rare cases the
// SVG document may not be 100% ready to render at that time. In those cases
// we would miss the subsequent invalidations if we didn't send out the
// notifications indirectly in |InvalidateObservers...|.
mHasPendingInvalidation = false;
if (SurfaceCache::InvalidateImage(ImageKey(this))) {
// If we still have recordings in the cache, make sure we handle future
// invalidations.
MOZ_ASSERT(mRenderingObserver, "Should have a rendering observer by now");
mRenderingObserver->ResumeHonoringInvalidations();
}
if (mProgressTracker) {
mProgressTracker->SyncNotifyProgress(FLAG_FRAME_COMPLETE,
GetMaxSizedIntRect());
}
}
NS_IMETHODIMP_(IntRect)
VectorImage::GetImageSpaceInvalidationRect(const IntRect& aRect) {
return aRect;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetHeight(int32_t* aHeight) {
if (mError || !mIsFullyLoaded) {
// XXXdholbert Technically we should leave outparam untouched when we
// fail. But since many callers don't check for failure, we set it to 0 on
// failure, for sane/predictable results.
*aHeight = 0;
return NS_ERROR_FAILURE;
}
SVGSVGElement* rootElem = mSVGDocumentWrapper->GetRootSVGElem();
MOZ_ASSERT(rootElem,
"Should have a root SVG elem, since we finished "
"loading without errors");
LengthPercentage rootElemHeight = rootElem->GetIntrinsicHeight();
if (!rootElemHeight.IsLength()) {
*aHeight = 0;
return NS_ERROR_FAILURE;
}
*aHeight = SVGUtils::ClampToInt(rootElemHeight.AsLength().ToCSSPixels());
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetIntrinsicSize(nsSize* aSize) {
if (mError || !mIsFullyLoaded) {
return NS_ERROR_FAILURE;
}
nsIFrame* rootFrame = mSVGDocumentWrapper->GetRootLayoutFrame();
if (!rootFrame) {
return NS_ERROR_FAILURE;
}
*aSize = nsSize(-1, -1);
IntrinsicSize rfSize = rootFrame->GetIntrinsicSize();
if (rfSize.width) {
aSize->width = *rfSize.width;
}
if (rfSize.height) {
aSize->height = *rfSize.height;
}
return NS_OK;
}
//******************************************************************************
Maybe<AspectRatio> VectorImage::GetIntrinsicRatio() {
if (mError || !mIsFullyLoaded) {
return Nothing();
}
nsIFrame* rootFrame = mSVGDocumentWrapper->GetRootLayoutFrame();
if (!rootFrame) {
return Nothing();
}
return Some(rootFrame->GetIntrinsicRatio());
}
NS_IMETHODIMP_(Orientation)
VectorImage::GetOrientation() { return Orientation(); }
NS_IMETHODIMP_(Resolution)
VectorImage::GetResolution() { return {}; }
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetType(uint16_t* aType) {
NS_ENSURE_ARG_POINTER(aType);
*aType = imgIContainer::TYPE_VECTOR;
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetProviderId(uint32_t* aId) {
NS_ENSURE_ARG_POINTER(aId);
*aId = ImageResource::GetImageProviderId();
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::GetAnimated(bool* aAnimated) {
if (mError || !mIsFullyLoaded) {
return NS_ERROR_FAILURE;
}
*aAnimated = mSVGDocumentWrapper->IsAnimated();
return NS_OK;
}
//******************************************************************************
int32_t VectorImage::GetFirstFrameDelay() {
if (mError) {
return -1;
}
if (!mSVGDocumentWrapper->IsAnimated()) {
return -1;
}
// We don't really have a frame delay, so just pretend that we constantly
// need updates.
return 0;
}
NS_IMETHODIMP_(bool)
VectorImage::WillDrawOpaqueNow() {
return false; // In general, SVG content is not opaque.
}
//******************************************************************************
NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
VectorImage::GetFrame(uint32_t aWhichFrame, uint32_t aFlags) {
if (mError) {
return nullptr;
}
// Look up height & width
// ----------------------
SVGSVGElement* svgElem = mSVGDocumentWrapper->GetRootSVGElem();
MOZ_ASSERT(svgElem,
"Should have a root SVG elem, since we finished "
"loading without errors");
LengthPercentage width = svgElem->GetIntrinsicWidth();
LengthPercentage height = svgElem->GetIntrinsicHeight();
if (!width.IsLength() || !height.IsLength()) {
// The SVG is lacking a definite size for its width or height, so we do not
// know how big of a surface to generate. Hence, we just bail.
return nullptr;
}
nsIntSize imageIntSize(SVGUtils::ClampToInt(width.AsLength().ToCSSPixels()),
SVGUtils::ClampToInt(height.AsLength().ToCSSPixels()));
return GetFrameAtSize(imageIntSize, aWhichFrame, aFlags);
}
NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
VectorImage::GetFrameAtSize(const IntSize& aSize, uint32_t aWhichFrame,
uint32_t aFlags) {
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE);
AutoProfilerImagePaintMarker PROFILER_RAII(this);
#ifdef DEBUG
NotifyDrawingObservers();
#endif
if (aSize.IsEmpty() || aWhichFrame > FRAME_MAX_VALUE || mError ||
!mIsFullyLoaded) {
return nullptr;
}
uint32_t whichFrame = mHaveAnimations ? aWhichFrame : FRAME_FIRST;
auto [sourceSurface, decodeSize] =
LookupCachedSurface(aSize, SVGImageContext(), aFlags);
if (sourceSurface) {
return sourceSurface.forget();
}
if (mSVGDocumentWrapper->IsDrawing()) {
NS_WARNING("Refusing to make re-entrant call to VectorImage::Draw");
return nullptr;
}
float animTime = (whichFrame == FRAME_FIRST)
? 0.0f
: mSVGDocumentWrapper->GetCurrentTimeAsFloat();
// By using a null gfxContext, we ensure that we will always attempt to
// create a surface, even if we aren't capable of caching it (e.g. due to our
// flags, having an animation, etc). Otherwise CreateSurface will assume that
// the caller is capable of drawing directly to its own draw target if we
// cannot cache.
SVGImageContext svgContext;
SVGDrawingParameters params(
nullptr, decodeSize, aSize, ImageRegion::Create(decodeSize),
SamplingFilter::POINT, svgContext, animTime, aFlags, 1.0);
bool didCache; // Was the surface put into the cache?
AutoRestoreSVGState autoRestore(params, mSVGDocumentWrapper,
/* aContextPaint */ false);
RefPtr<gfxDrawable> svgDrawable = CreateSVGDrawable(params);
RefPtr<SourceSurface> surface = CreateSurface(params, svgDrawable, didCache);
if (!surface) {
MOZ_ASSERT(!didCache);
return nullptr;
}
SendFrameComplete(didCache, params.flags);
return surface.forget();
}
NS_IMETHODIMP_(bool)
VectorImage::IsImageContainerAvailable(WindowRenderer* aRenderer,
uint32_t aFlags) {
if (mError || !mIsFullyLoaded ||
aRenderer->GetBackendType() != LayersBackend::LAYERS_WR) {
return false;
}
if (mHaveAnimations && !StaticPrefs::image_svg_blob_image()) {
// We don't support rasterizing animation SVGs. We can put them in a blob
// recording however instead of using fallback.
return false;
}
return true;
}
//******************************************************************************
NS_IMETHODIMP_(ImgDrawResult)
VectorImage::GetImageProvider(WindowRenderer* aRenderer,
const gfx::IntSize& aSize,
const SVGImageContext& aSVGContext,
const Maybe<ImageIntRegion>& aRegion,
uint32_t aFlags,
WebRenderImageProvider** aProvider) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aRenderer);
MOZ_ASSERT(!(aFlags & FLAG_BYPASS_SURFACE_CACHE), "Unsupported flags");
// We don't need to check if the size is too big since we only support
// WebRender backends.
if (aSize.IsEmpty()) {
return ImgDrawResult::BAD_ARGS;
}
if (mError) {
return ImgDrawResult::BAD_IMAGE;
}
if (!mIsFullyLoaded) {
return ImgDrawResult::NOT_READY;
}
if (mHaveAnimations && !(aFlags & FLAG_RECORD_BLOB)) {
// We don't support rasterizing animation SVGs. We can put them in a blob
// recording however instead of using fallback.
return ImgDrawResult::NOT_SUPPORTED;
}
AutoProfilerImagePaintMarker PROFILER_RAII(this);
#ifdef DEBUG
NotifyDrawingObservers();
#endif
// Only blob recordings support a region to restrict drawing.
const bool blobRecording = aFlags & FLAG_RECORD_BLOB;
MOZ_ASSERT_IF(!blobRecording, aRegion.isNothing());
LookupResult result(MatchType::NOT_FOUND);
auto playbackType =
mHaveAnimations ? PlaybackType::eAnimated : PlaybackType::eStatic;
auto surfaceFlags = ToSurfaceFlags(aFlags);
SVGImageContext newSVGContext = aSVGContext;
bool contextPaint = MaybeRestrictSVGContext(newSVGContext, aFlags);
SurfaceKey surfaceKey = VectorSurfaceKey(aSize, aRegion, newSVGContext,
surfaceFlags, playbackType);
if ((aFlags & FLAG_SYNC_DECODE) || !(aFlags & FLAG_HIGH_QUALITY_SCALING)) {
result = SurfaceCache::Lookup(ImageKey(this), surfaceKey,
/* aMarkUsed = */ true);
} else {
result = SurfaceCache::LookupBestMatch(ImageKey(this), surfaceKey,
/* aMarkUsed = */ true);
}
// Unless we get a best match (exact or factor of 2 limited), then we want to
// generate a new recording/rerasterize, even if we have a substitute.
if (result && (result.Type() == MatchType::EXACT ||
result.Type() == MatchType::SUBSTITUTE_BECAUSE_BEST)) {
result.Surface().TakeProvider(aProvider);
return ImgDrawResult::SUCCESS;
}
// Ensure we store the surface with the correct key if we switched to factor
// of 2 sizing or we otherwise got clamped.
IntSize rasterSize(aSize);
if (!result.SuggestedSize().IsEmpty()) {
rasterSize = result.SuggestedSize();
surfaceKey = surfaceKey.CloneWithSize(rasterSize);
}
// We're about to rerasterize, which may mean that some of the previous
// surfaces we've rasterized aren't useful anymore. We can allow them to
// expire from the cache by unlocking them here, and then sending out an
// invalidation. If this image is locked, any surfaces that are still useful
// will become locked again when Draw touches them, and the remainder will
// eventually expire.
bool mayCache = SurfaceCache::CanHold(rasterSize);
if (mayCache) {
SurfaceCache::UnlockEntries(ImageKey(this));
}
// Blob recorded vector images just create a provider responsible for
// generating blob keys and recording bindings. The recording won't happen
// until the caller requests the key explicitly.
RefPtr<ISurfaceProvider> provider;
if (blobRecording) {
provider = MakeRefPtr<BlobSurfaceProvider>(ImageKey(this), surfaceKey,
mSVGDocumentWrapper, aFlags);
} else {
if (mSVGDocumentWrapper->IsDrawing()) {
NS_WARNING("Refusing to make re-entrant call to VectorImage::Draw");
return ImgDrawResult::TEMPORARY_ERROR;
}
if (!SurfaceCache::IsLegalSize(rasterSize) ||
!Factory::AllowedSurfaceSize(rasterSize)) {
// If either of these is true then the InitWithDrawable call below will
// fail, so fail early and use this opportunity to return NOT_SUPPORTED
// instead of TEMPORARY_ERROR as we do for any InitWithDrawable failure.
// This means that we will use fallback which has a path that will draw
// directly into the gfxContext without having to allocate a surface. It
// means we will have to use fallback and re-rasterize for everytime we
// have to draw this image, but it's better than not drawing anything at
// all.
return ImgDrawResult::NOT_SUPPORTED;
}
// We aren't using blobs, so we need to rasterize.
float animTime =
mHaveAnimations ? mSVGDocumentWrapper->GetCurrentTimeAsFloat() : 0.0f;
// By using a null gfxContext, we ensure that we will always attempt to
// create a surface, even if we aren't capable of caching it (e.g. due to
// our flags, having an animation, etc). Otherwise CreateSurface will assume
// that the caller is capable of drawing directly to its own draw target if
// we cannot cache.
SVGDrawingParameters params(
nullptr, rasterSize, aSize, ImageRegion::Create(rasterSize),
SamplingFilter::POINT, newSVGContext, animTime, aFlags, 1.0);
RefPtr<gfxDrawable> svgDrawable = CreateSVGDrawable(params);
AutoRestoreSVGState autoRestore(params, mSVGDocumentWrapper, contextPaint);
mSVGDocumentWrapper->UpdateViewportBounds(params.viewportSize);
mSVGDocumentWrapper->FlushImageTransformInvalidation();
// Given we have no context, the default backend is fine.
BackendType backend =
gfxPlatform::GetPlatform()->GetDefaultContentBackend();
// Try to create an imgFrame, initializing the surface it contains by
// drawing our gfxDrawable into it. (We use FILTER_NEAREST since we never
// scale here.)
auto frame = MakeNotNull<RefPtr<imgFrame>>();
nsresult rv = frame->InitWithDrawable(
svgDrawable, params.size, SurfaceFormat::OS_RGBA, SamplingFilter::POINT,
params.flags, backend);
// If we couldn't create the frame, it was probably because it would end
// up way too big. Generally it also wouldn't fit in the cache, but the
// prefs could be set such that the cache isn't the limiting factor.
if (NS_FAILED(rv)) {
return ImgDrawResult::TEMPORARY_ERROR;
}
provider =
MakeRefPtr<SimpleSurfaceProvider>(ImageKey(this), surfaceKey, frame);
}
if (mayCache) {
// Attempt to cache the frame.
if (SurfaceCache::Insert(WrapNotNull(provider)) == InsertOutcome::SUCCESS) {
if (rasterSize != aSize) {
// We created a new surface that wasn't the size we requested, which
// means we entered factor-of-2 mode. We should purge any surfaces we
// no longer need rather than waiting for the cache to expire them.
SurfaceCache::PruneImage(ImageKey(this));
}
SendFrameComplete(/* aDidCache */ true, aFlags);
}
}
MOZ_ASSERT(provider);
provider.forget(aProvider);
return ImgDrawResult::SUCCESS;
}
bool VectorImage::MaybeRestrictSVGContext(SVGImageContext& aSVGContext,
uint32_t aFlags) {
bool overridePAR = (aFlags & FLAG_FORCE_PRESERVEASPECTRATIO_NONE);
bool haveContextPaint = aSVGContext.GetContextPaint();
bool blockContextPaint =
haveContextPaint && !SVGContextPaint::IsAllowedForImageFromURI(mURI);
if (overridePAR || blockContextPaint) {
if (overridePAR) {
// The SVGImageContext must take account of the preserveAspectRatio
// override:
MOZ_ASSERT(!aSVGContext.GetPreserveAspectRatio(),
"FLAG_FORCE_PRESERVEASPECTRATIO_NONE is not expected if a "
"preserveAspectRatio override is supplied");
Maybe<SVGPreserveAspectRatio> aspectRatio = Some(SVGPreserveAspectRatio(
SVG_PRESERVEASPECTRATIO_NONE, SVG_MEETORSLICE_UNKNOWN));
aSVGContext.SetPreserveAspectRatio(aspectRatio);
}
if (blockContextPaint) {
// The SVGImageContext must not include context paint if the image is
// not allowed to use it:
aSVGContext.ClearContextPaint();
}
}
return haveContextPaint && !blockContextPaint;
}
//******************************************************************************
NS_IMETHODIMP_(ImgDrawResult)
VectorImage::Draw(gfxContext* aContext, const nsIntSize& aSize,
const ImageRegion& aRegion, uint32_t aWhichFrame,
SamplingFilter aSamplingFilter,
const SVGImageContext& aSVGContext, uint32_t aFlags,
float aOpacity) {
if (aWhichFrame > FRAME_MAX_VALUE) {
return ImgDrawResult::BAD_ARGS;
}
if (!aContext) {
return ImgDrawResult::BAD_ARGS;
}
if (mError) {
return ImgDrawResult::BAD_IMAGE;
}
if (!mIsFullyLoaded) {
return ImgDrawResult::NOT_READY;
}
if (mAnimationConsumers == 0 && mHaveAnimations) {
SendOnUnlockedDraw(aFlags);
}
// We should bypass the cache when:
// - We are using a DrawTargetRecording because we prefer the drawing commands
// in general to the rasterized surface. This allows blob images to avoid
// rasterized SVGs with WebRender.
if (aContext->GetDrawTarget()->GetBackendType() == BackendType::RECORDING) {
aFlags |= FLAG_BYPASS_SURFACE_CACHE;
}
MOZ_ASSERT(!(aFlags & FLAG_FORCE_PRESERVEASPECTRATIO_NONE) ||
aSVGContext.GetViewportSize(),
"Viewport size is required when using "
"FLAG_FORCE_PRESERVEASPECTRATIO_NONE");
uint32_t whichFrame = mHaveAnimations ? aWhichFrame : FRAME_FIRST;
float animTime = (whichFrame == FRAME_FIRST)
? 0.0f
: mSVGDocumentWrapper->GetCurrentTimeAsFloat();
SVGImageContext newSVGContext = aSVGContext;
bool contextPaint = MaybeRestrictSVGContext(newSVGContext, aFlags);
SVGDrawingParameters params(aContext, aSize, aSize, aRegion, aSamplingFilter,
newSVGContext, animTime, aFlags, aOpacity);
// If we have an prerasterized version of this image that matches the
// drawing parameters, use that.
RefPtr<SourceSurface> sourceSurface;
std::tie(sourceSurface, params.size) =
LookupCachedSurface(aSize, params.svgContext, aFlags);
if (sourceSurface) {
RefPtr<gfxDrawable> drawable =
new gfxSurfaceDrawable(sourceSurface, params.size);
Show(drawable, params);
return ImgDrawResult::SUCCESS;
}
// else, we need to paint the image:
if (mSVGDocumentWrapper->IsDrawing()) {
NS_WARNING("Refusing to make re-entrant call to VectorImage::Draw");
return ImgDrawResult::TEMPORARY_ERROR;
}
AutoRestoreSVGState autoRestore(params, mSVGDocumentWrapper, contextPaint);
bool didCache; // Was the surface put into the cache?
RefPtr<gfxDrawable> svgDrawable = CreateSVGDrawable(params);
sourceSurface = CreateSurface(params, svgDrawable, didCache);
if (!sourceSurface) {
MOZ_ASSERT(!didCache);
Show(svgDrawable, params);
return ImgDrawResult::SUCCESS;
}
RefPtr<gfxDrawable> drawable =
new gfxSurfaceDrawable(sourceSurface, params.size);
Show(drawable, params);
SendFrameComplete(didCache, params.flags);
return ImgDrawResult::SUCCESS;
}
already_AddRefed<gfxDrawable> VectorImage::CreateSVGDrawable(
const SVGDrawingParameters& aParams) {
RefPtr<gfxDrawingCallback> cb = new SVGDrawingCallback(
mSVGDocumentWrapper, aParams.viewportSize, aParams.size, aParams.flags);
RefPtr<gfxDrawable> svgDrawable = new gfxCallbackDrawable(cb, aParams.size);
return svgDrawable.forget();
}
std::tuple<RefPtr<SourceSurface>, IntSize> VectorImage::LookupCachedSurface(
const IntSize& aSize, const SVGImageContext& aSVGContext, uint32_t aFlags) {
// We can't use cached surfaces if we:
// - Explicitly disallow it via FLAG_BYPASS_SURFACE_CACHE
// - Want a blob recording which aren't supported by the cache.
// - Have animations which aren't supported by the cache.
if (aFlags & (FLAG_BYPASS_SURFACE_CACHE | FLAG_RECORD_BLOB) ||
mHaveAnimations) {
return std::make_tuple(RefPtr<SourceSurface>(), aSize);
}
LookupResult result(MatchType::NOT_FOUND);
SurfaceKey surfaceKey = VectorSurfaceKey(aSize, aSVGContext);
if ((aFlags & FLAG_SYNC_DECODE) || !(aFlags & FLAG_HIGH_QUALITY_SCALING)) {
result = SurfaceCache::Lookup(ImageKey(this), surfaceKey,
/* aMarkUsed = */ true);
} else {
result = SurfaceCache::LookupBestMatch(ImageKey(this), surfaceKey,
/* aMarkUsed = */ true);
}
IntSize rasterSize =
result.SuggestedSize().IsEmpty() ? aSize : result.SuggestedSize();
MOZ_ASSERT(result.Type() != MatchType::SUBSTITUTE_BECAUSE_PENDING);
if (!result || result.Type() == MatchType::SUBSTITUTE_BECAUSE_NOT_FOUND) {
// No matching surface, or the OS freed the volatile buffer.
return std::make_tuple(RefPtr<SourceSurface>(), rasterSize);
}
RefPtr<SourceSurface> sourceSurface = result.Surface()->GetSourceSurface();
if (!sourceSurface) {
// Something went wrong. (Probably a GPU driver crash or device reset.)
// Attempt to recover.
RecoverFromLossOfSurfaces();
return std::make_tuple(RefPtr<SourceSurface>(), rasterSize);
}
return std::make_tuple(std::move(sourceSurface), rasterSize);
}
already_AddRefed<SourceSurface> VectorImage::CreateSurface(
const SVGDrawingParameters& aParams, gfxDrawable* aSVGDrawable,
bool& aWillCache) {
MOZ_ASSERT(mSVGDocumentWrapper->IsDrawing());
MOZ_ASSERT(!(aParams.flags & FLAG_RECORD_BLOB));
mSVGDocumentWrapper->UpdateViewportBounds(aParams.viewportSize);
mSVGDocumentWrapper->FlushImageTransformInvalidation();
// Determine whether or not we should put the surface to be created into
// the cache. If we fail, we need to reset this to false to let the caller
// know nothing was put in the cache.
aWillCache = !(aParams.flags & FLAG_BYPASS_SURFACE_CACHE) &&
// Refuse to cache animated images:
// XXX(seth): We may remove this restriction in bug 922893.
!mHaveAnimations &&
// The image is too big to fit in the cache:
SurfaceCache::CanHold(aParams.size);
// If we weren't given a context, then we know we just want the rasterized
// surface. We will create the frame below but only insert it into the cache
// if we actually need to.
if (!aWillCache && aParams.context) {
return nullptr;
}
// We're about to rerasterize, which may mean that some of the previous
// surfaces we've rasterized aren't useful anymore. We can allow them to
// expire from the cache by unlocking them here, and then sending out an
// invalidation. If this image is locked, any surfaces that are still useful
// will become locked again when Draw touches them, and the remainder will
// eventually expire.
if (aWillCache) {
SurfaceCache::UnlockEntries(ImageKey(this));
}
// If there is no context, the default backend is fine.
BackendType backend =
aParams.context ? aParams.context->GetDrawTarget()->GetBackendType()
: gfxPlatform::GetPlatform()->GetDefaultContentBackend();
if (backend == BackendType::DIRECT2D1_1) {
// We don't want to draw arbitrary content with D2D anymore
// because it doesn't support PushLayerWithBlend so switch to skia
backend = BackendType::SKIA;
}
// Try to create an imgFrame, initializing the surface it contains by drawing
// our gfxDrawable into it. (We use FILTER_NEAREST since we never scale here.)
auto frame = MakeNotNull<RefPtr<imgFrame>>();
nsresult rv = frame->InitWithDrawable(
aSVGDrawable, aParams.size, SurfaceFormat::OS_RGBA, SamplingFilter::POINT,
aParams.flags, backend);
// If we couldn't create the frame, it was probably because it would end
// up way too big. Generally it also wouldn't fit in the cache, but the prefs
// could be set such that the cache isn't the limiting factor.
if (NS_FAILED(rv)) {
aWillCache = false;
return nullptr;
}
// Take a strong reference to the frame's surface and make sure it hasn't
// already been purged by the operating system.
RefPtr<SourceSurface> surface = frame->GetSourceSurface();
if (!surface) {
aWillCache = false;
return nullptr;
}
// We created the frame, but only because we had no context to draw to
// directly. All the caller wants is the surface in this case.
if (!aWillCache) {
return surface.forget();
}
// Attempt to cache the frame.
SurfaceKey surfaceKey = VectorSurfaceKey(aParams.size, aParams.svgContext);
NotNull<RefPtr<ISurfaceProvider>> provider =
MakeNotNull<SimpleSurfaceProvider*>(ImageKey(this), surfaceKey, frame);
if (SurfaceCache::Insert(provider) == InsertOutcome::SUCCESS) {
if (aParams.size != aParams.drawSize) {
// We created a new surface that wasn't the size we requested, which means
// we entered factor-of-2 mode. We should purge any surfaces we no longer
// need rather than waiting for the cache to expire them.
SurfaceCache::PruneImage(ImageKey(this));
}
} else {
aWillCache = false;
}
return surface.forget();
}
void VectorImage::SendFrameComplete(bool aDidCache, uint32_t aFlags) {
// If the cache was not updated, we have nothing to do.
if (!aDidCache) {
return;
}
// Send out an invalidation so that surfaces that are still in use get
// re-locked. See the discussion of the UnlockSurfaces call above.
if (!(aFlags & FLAG_ASYNC_NOTIFY)) {
mProgressTracker->SyncNotifyProgress(FLAG_FRAME_COMPLETE,
GetMaxSizedIntRect());
} else {
NotNull<RefPtr<VectorImage>> image = WrapNotNull(this);
NS_DispatchToMainThread(CreateRenderBlockingRunnable(NS_NewRunnableFunction(
"ProgressTracker::SyncNotifyProgress", [=]() -> void {
RefPtr<ProgressTracker> tracker = image->GetProgressTracker();
if (tracker) {
tracker->SyncNotifyProgress(FLAG_FRAME_COMPLETE,
GetMaxSizedIntRect());
}
})));
}
}
void VectorImage::Show(gfxDrawable* aDrawable,
const SVGDrawingParameters& aParams) {
// The surface size may differ from the size at which we wish to draw. As
// such, we may need to adjust the context/region to take this into account.
gfxContextMatrixAutoSaveRestore saveMatrix(aParams.context);
ImageRegion region(aParams.region);
if (aParams.drawSize != aParams.size) {
gfx::MatrixScales scale(
double(aParams.drawSize.width) / aParams.size.width,
double(aParams.drawSize.height) / aParams.size.height);
aParams.context->Multiply(gfx::Matrix::Scaling(scale));
region.Scale(1.0 / scale.xScale, 1.0 / scale.yScale);
}
MOZ_ASSERT(aDrawable, "Should have a gfxDrawable by now");
gfxUtils::DrawPixelSnapped(aParams.context, aDrawable,
SizeDouble(aParams.size), region,
SurfaceFormat::OS_RGBA, aParams.samplingFilter,
aParams.flags, aParams.opacity, false);
AutoProfilerImagePaintMarker PROFILER_RAII(this);
#ifdef DEBUG
NotifyDrawingObservers();
#endif
MOZ_ASSERT(mRenderingObserver, "Should have a rendering observer by now");
mRenderingObserver->ResumeHonoringInvalidations();
}
void VectorImage::RecoverFromLossOfSurfaces() {
NS_WARNING("An imgFrame became invalid. Attempting to recover...");
// Discard all existing frames, since they're probably all now invalid.
SurfaceCache::RemoveImage(ImageKey(this));
}
NS_IMETHODIMP
VectorImage::StartDecoding(uint32_t aFlags, uint32_t aWhichFrame) {
// Nothing to do for SVG images
return NS_OK;
}
bool VectorImage::StartDecodingWithResult(uint32_t aFlags,
uint32_t aWhichFrame) {
// SVG images are ready to draw when they are loaded
return mIsFullyLoaded;
}
bool VectorImage::HasDecodedPixels() {
MOZ_ASSERT_UNREACHABLE("calling VectorImage::HasDecodedPixels");
return mIsFullyLoaded;
}
imgIContainer::DecodeResult VectorImage::RequestDecodeWithResult(
uint32_t aFlags, uint32_t aWhichFrame) {
// SVG images are ready to draw when they are loaded and don't have an error.
if (mError) {
return imgIContainer::DECODE_REQUEST_FAILED;
}
if (!mIsFullyLoaded) {
return imgIContainer::DECODE_REQUESTED;
}
return imgIContainer::DECODE_SURFACE_AVAILABLE;
}
NS_IMETHODIMP
VectorImage::RequestDecodeForSize(const nsIntSize& aSize, uint32_t aFlags,
uint32_t aWhichFrame) {
// Nothing to do for SVG images, though in theory we could rasterize to the
// provided size ahead of time if we supported off-main-thread SVG
// rasterization...
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::LockImage() {
MOZ_ASSERT(NS_IsMainThread());
if (mError) {
return NS_ERROR_FAILURE;
}
mLockCount++;
if (mLockCount == 1) {
// Lock this image's surfaces in the SurfaceCache.
SurfaceCache::LockImage(ImageKey(this));
}
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::UnlockImage() {
MOZ_ASSERT(NS_IsMainThread());
if (mError) {
return NS_ERROR_FAILURE;
}
if (mLockCount == 0) {
MOZ_ASSERT_UNREACHABLE("Calling UnlockImage with a zero lock count");
return NS_ERROR_ABORT;
}
mLockCount--;
if (mLockCount == 0) {
// Unlock this image's surfaces in the SurfaceCache.
SurfaceCache::UnlockImage(ImageKey(this));
}
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::RequestDiscard() {
MOZ_ASSERT(NS_IsMainThread());
if (mDiscardable && mLockCount == 0) {
SurfaceCache::RemoveImage(ImageKey(this));
mProgressTracker->OnDiscard();
}
return NS_OK;
}
void VectorImage::OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey) {
MOZ_ASSERT(mProgressTracker);
NS_DispatchToMainThread(NewRunnableMethod("ProgressTracker::OnDiscard",
mProgressTracker,
&ProgressTracker::OnDiscard));
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::ResetAnimation() {
if (mError) {
return NS_ERROR_FAILURE;
}
if (!mIsFullyLoaded || !mHaveAnimations) {
return NS_OK; // There are no animations to be reset.
}
mSVGDocumentWrapper->ResetAnimation();
return NS_OK;
}
NS_IMETHODIMP_(float)
VectorImage::GetFrameIndex(uint32_t aWhichFrame) {
MOZ_ASSERT(aWhichFrame <= FRAME_MAX_VALUE, "Invalid argument");
return aWhichFrame == FRAME_FIRST
? 0.0f
: mSVGDocumentWrapper->GetCurrentTimeAsFloat();
}
//------------------------------------------------------------------------------
// nsIRequestObserver methods
//******************************************************************************
NS_IMETHODIMP
VectorImage::OnStartRequest(nsIRequest* aRequest) {
MOZ_ASSERT(!mSVGDocumentWrapper,
"Repeated call to OnStartRequest -- can this happen?");
mSVGDocumentWrapper = new SVGDocumentWrapper();
nsresult rv = mSVGDocumentWrapper->OnStartRequest(aRequest);
if (NS_FAILED(rv)) {
mSVGDocumentWrapper = nullptr;
mError = true;
return rv;
}
// Create a listener to wait until the SVG document is fully loaded, which
// will signal that this image is ready to render. Certain error conditions
// will prevent us from ever getting this notification, so we also create a
// listener that waits for parsing to complete and cancels the
// SVGLoadEventListener if needed. The listeners are automatically attached
// to the document by their constructors.
SVGDocument* document = mSVGDocumentWrapper->GetDocument();
mLoadEventListener = new SVGLoadEventListener(document, this);
mParseCompleteListener = new SVGParseCompleteListener(document, this);
// Displayed documents will call InitUseCounters under SetScriptGlobalObject,
// but SVG image documents never get a script global object, so we initialize
// use counters here, right after the document has been created.
document->InitUseCounters();
return NS_OK;
}
//******************************************************************************
NS_IMETHODIMP
VectorImage::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) {
if (mError) {
return NS_ERROR_FAILURE;
}
return mSVGDocumentWrapper->OnStopRequest(aRequest, aStatus);
}
void VectorImage::OnSVGDocumentParsed() {
MOZ_ASSERT(mParseCompleteListener, "Should have the parse complete listener");
MOZ_ASSERT(mLoadEventListener, "Should have the load event listener");
if (!mSVGDocumentWrapper->GetRootSVGElem()) {
// This is an invalid SVG document. It may have failed to parse, or it may
// be missing the <svg> root element, or the <svg> root element may not
// declare the correct namespace. In any of these cases, we'll never be
// notified that the SVG finished loading, so we need to treat this as an
// error.
OnSVGDocumentError();
}
}
void VectorImage::CancelAllListeners() {
if (mParseCompleteListener) {
mParseCompleteListener->Cancel();
mParseCompleteListener = nullptr;
}
if (mLoadEventListener) {
mLoadEventListener->Cancel();
mLoadEventListener = nullptr;
}
}
void VectorImage::OnSVGDocumentLoaded() {
MOZ_ASSERT(mSVGDocumentWrapper->GetRootSVGElem(),
"Should have parsed successfully");
MOZ_ASSERT(!mIsFullyLoaded && !mHaveAnimations,
"These flags shouldn't get set until OnSVGDocumentLoaded. "
"Duplicate calls to OnSVGDocumentLoaded?");
CancelAllListeners();
// XXX Flushing is wasteful if embedding frame hasn't had initial reflow.
mSVGDocumentWrapper->FlushLayout();
// This is the earliest point that we can get accurate use counter data
// for a valid SVG document. Without the FlushLayout call, we would miss
// any CSS property usage that comes from SVG presentation attributes.
mSVGDocumentWrapper->GetDocument()->ReportDocumentUseCounters();
mIsFullyLoaded = true;
mHaveAnimations = mSVGDocumentWrapper->IsAnimated();
// Start listening to our image for rendering updates.
mRenderingObserver = new SVGRootRenderingObserver(mSVGDocumentWrapper, this);
// ProgressTracker::SyncNotifyProgress may release us, so ensure we
// stick around long enough to complete our work.
RefPtr<VectorImage> kungFuDeathGrip(this);
// Tell *our* observers that we're done loading.
if (mProgressTracker) {
Progress progress = FLAG_SIZE_AVAILABLE | FLAG_HAS_TRANSPARENCY |
FLAG_FRAME_COMPLETE | FLAG_DECODE_COMPLETE;
if (mHaveAnimations) {
progress |= FLAG_IS_ANIMATED;
}
// Merge in any saved progress from OnImageDataComplete.
if (mLoadProgress) {
progress |= *mLoadProgress;
mLoadProgress = Nothing();
}
mProgressTracker->SyncNotifyProgress(progress, GetMaxSizedIntRect());
}
EvaluateAnimation();
}
void VectorImage::OnSVGDocumentError() {
CancelAllListeners();
mError = true;
// We won't enter OnSVGDocumentLoaded, so report use counters now for this
// invalid document.
ReportDocumentUseCounters();
if (mProgressTracker) {
// Notify observers about the error and unblock page load.
Progress progress = FLAG_HAS_ERROR;
// Merge in any saved progress from OnImageDataComplete.
if (mLoadProgress) {
progress |= *mLoadProgress;
mLoadProgress = Nothing();
}
mProgressTracker->SyncNotifyProgress(progress);
}
}
//------------------------------------------------------------------------------
// nsIStreamListener method
//******************************************************************************
NS_IMETHODIMP
VectorImage::OnDataAvailable(nsIRequest* aRequest, nsIInputStream* aInStr,
uint64_t aSourceOffset, uint32_t aCount) {
if (mError) {
return NS_ERROR_FAILURE;
}
return mSVGDocumentWrapper->OnDataAvailable(aRequest, aInStr, aSourceOffset,
aCount);
}
// --------------------------
// Invalidation helper method
void VectorImage::InvalidateObserversOnNextRefreshDriverTick() {
if (mHasPendingInvalidation) {
return;
}
mHasPendingInvalidation = true;
// Animated images can wait for the refresh tick.
if (mHaveAnimations) {
return;
}
// Non-animated images won't get the refresh tick, so we should just send an
// invalidation outside the current execution context. We need to defer
// because the layout tree is in the middle of invalidation, and the tree
// state needs to be consistent. Specifically only some of the frames have
// had the NS_FRAME_DESCENDANT_NEEDS_PAINT and/or NS_FRAME_NEEDS_PAINT bits
// set by InvalidateFrameInternal in layout/generic/nsFrame.cpp. These bits
// get cleared when we repaint the SVG into a surface by
// nsIFrame::ClearInvalidationStateBits in nsDisplayList::PaintRoot.
nsCOMPtr<nsIEventTarget> eventTarget = do_GetMainThread();
RefPtr<VectorImage> self(this);
nsCOMPtr<nsIRunnable> ev(NS_NewRunnableFunction(
"VectorImage::SendInvalidationNotifications",
[=]() -> void { self->SendInvalidationNotifications(); }));
eventTarget->Dispatch(CreateRenderBlockingRunnable(ev.forget()),
NS_DISPATCH_NORMAL);
}
void VectorImage::PropagateUseCounters(Document* aReferencingDocument) {
if (Document* doc = mSVGDocumentWrapper->GetDocument()) {
doc->PropagateImageUseCounters(aReferencingDocument);
}
}
nsIntSize VectorImage::OptimalImageSizeForDest(const gfxSize& aDest,
uint32_t aWhichFrame,
SamplingFilter aSamplingFilter,
uint32_t aFlags) {
MOZ_ASSERT(aDest.width >= 0 || ceil(aDest.width) <= INT32_MAX ||
aDest.height >= 0 || ceil(aDest.height) <= INT32_MAX,
"Unexpected destination size");
// We can rescale SVGs freely, so just return the provided destination size.
return nsIntSize::Ceil(aDest.width, aDest.height);
}
already_AddRefed<imgIContainer> VectorImage::Unwrap() {
nsCOMPtr<imgIContainer> self(this);
return self.forget();
}
void VectorImage::MediaFeatureValuesChangedAllDocuments(
const MediaFeatureChange& aChange) {
if (!mSVGDocumentWrapper) {
return;
}
// Don't bother if the document hasn't loaded yet.
if (!mIsFullyLoaded) {
return;
}
if (Document* doc = mSVGDocumentWrapper->GetDocument()) {
if (RefPtr<nsPresContext> presContext = doc->GetPresContext()) {
presContext->MediaFeatureValuesChanged(
aChange, MediaFeatureChangePropagation::All);
// Media feature value changes don't happen in the middle of layout,
// so we don't need to call InvalidateObserversOnNextRefreshDriverTick
// to invalidate asynchronously.
if (presContext->FlushPendingMediaFeatureValuesChanged()) {
// NOTE(emilio): SendInvalidationNotifications flushes layout via
// VectorImage::CreateSurface -> FlushImageTransformInvalidation.
SendInvalidationNotifications();
}
}
}
}
nsresult VectorImage::GetHotspotX(int32_t* aX) {
return Image::GetHotspotX(aX);
}
nsresult VectorImage::GetHotspotY(int32_t* aY) {
return Image::GetHotspotY(aY);
}
void VectorImage::ReportDocumentUseCounters() {
if (!mSVGDocumentWrapper) {
return;
}
if (Document* doc = mSVGDocumentWrapper->GetDocument()) {
doc->ReportDocumentUseCounters();
}
}
} // namespace image
} // namespace mozilla
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