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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) {