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gecko-dev/image/Image.cpp

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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 "Image.h"
#include "imgRequest.h"
#include "Layers.h" // for LayerManager
#include "nsIObserverService.h"
#include "nsRefreshDriver.h"
#include "nsContentUtils.h"
#include "mozilla/Services.h"
#include "mozilla/SizeOfState.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Tuple.h" // for Tie
#include "mozilla/layers/SharedSurfacesChild.h"
namespace mozilla {
namespace image {
///////////////////////////////////////////////////////////////////////////////
// Memory Reporting
///////////////////////////////////////////////////////////////////////////////
ImageMemoryCounter::ImageMemoryCounter(imgRequest* aRequest,
SizeOfState& aState, bool aIsUsed)
: mProgress(UINT32_MAX),
mType(UINT16_MAX),
mIsUsed(aIsUsed),
mHasError(false),
mValidating(false) {
MOZ_ASSERT(aRequest);
// We don't have the image object yet, but we can get some information.
nsCOMPtr<nsIURI> imageURL;
nsresult rv = aRequest->GetURI(getter_AddRefs(imageURL));
if (NS_SUCCEEDED(rv) && imageURL) {
imageURL->GetSpec(mURI);
}
mType = imgIContainer::TYPE_REQUEST;
mHasError = NS_FAILED(aRequest->GetImageErrorCode());
mValidating = !!aRequest->GetValidator();
RefPtr<ProgressTracker> tracker = aRequest->GetProgressTracker();
if (tracker) {
mProgress = tracker->GetProgress();
}
}
ImageMemoryCounter::ImageMemoryCounter(imgRequest* aRequest, Image* aImage,
SizeOfState& aState, bool aIsUsed)
: mProgress(UINT32_MAX),
mType(UINT16_MAX),
mIsUsed(aIsUsed),
mHasError(false),
mValidating(false) {
MOZ_ASSERT(aRequest);
MOZ_ASSERT(aImage);
// Extract metadata about the image.
nsCOMPtr<nsIURI> imageURL(aImage->GetURI());
if (imageURL) {
imageURL->GetSpec(mURI);
}
int32_t width = 0;
int32_t height = 0;
aImage->GetWidth(&width);
aImage->GetHeight(&height);
mIntrinsicSize.SizeTo(width, height);
mType = aImage->GetType();
mHasError = aImage->HasError();
mValidating = !!aRequest->GetValidator();
RefPtr<ProgressTracker> tracker = aImage->GetProgressTracker();
if (tracker) {
mProgress = tracker->GetProgress();
}
// Populate memory counters for source and decoded data.
mValues.SetSource(aImage->SizeOfSourceWithComputedFallback(aState));
aImage->CollectSizeOfSurfaces(mSurfaces, aState.mMallocSizeOf);
// Compute totals.
for (const SurfaceMemoryCounter& surfaceCounter : mSurfaces) {
mValues += surfaceCounter.Values();
}
}
///////////////////////////////////////////////////////////////////////////////
// Image Base Types
///////////////////////////////////////////////////////////////////////////////
bool ImageResource::GetSpecTruncatedTo1k(nsCString& aSpec) const {
static const size_t sMaxTruncatedLength = 1024;
mURI->GetSpec(aSpec);
if (sMaxTruncatedLength >= aSpec.Length()) {
return true;
}
aSpec.Truncate(sMaxTruncatedLength);
return false;
}
void ImageResource::SetCurrentImage(ImageContainer* aContainer,
SourceSurface* aSurface,
const Maybe<IntRect>& aDirtyRect) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aContainer);
if (!aSurface) {
// The OS threw out some or all of our buffer. We'll need to wait for the
// redecode (which was automatically triggered by GetFrame) to complete.
return;
}
// |image| holds a reference to a SourceSurface which in turn holds a lock on
// the current frame's data buffer, ensuring that it doesn't get freed as
// long as the layer system keeps this ImageContainer alive.
RefPtr<layers::Image> image = new layers::SourceSurfaceImage(aSurface);
// We can share the producer ID with other containers because it is only
// used internally to validate the frames given to a particular container
// so that another object cannot add its own. Similarly the frame ID is
// only used internally to ensure it is always increasing, and skipping
// IDs from an individual container's perspective is acceptable.
AutoTArray<ImageContainer::NonOwningImage, 1> imageList;
imageList.AppendElement(ImageContainer::NonOwningImage(
image, TimeStamp(), mLastFrameID++, mImageProducerID));
if (aDirtyRect) {
aContainer->SetCurrentImagesInTransaction(imageList);
} else {
aContainer->SetCurrentImages(imageList);
}
// If we are animated, then we should request that the image container be
// treated as such, to avoid display list rebuilding to update frames for
// WebRender.
if (mProgressTracker->GetProgress() & FLAG_IS_ANIMATED) {
if (aDirtyRect) {
layers::SharedSurfacesChild::UpdateAnimation(aContainer, aSurface,
aDirtyRect.ref());
} else {
IntRect dirtyRect(IntPoint(0, 0), aSurface->GetSize());
layers::SharedSurfacesChild::UpdateAnimation(aContainer, aSurface,
dirtyRect);
}
}
}
ImgDrawResult ImageResource::GetImageContainerImpl(
LayerManager* aManager, const IntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext, uint32_t aFlags,
ImageContainer** aOutContainer) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aManager);
MOZ_ASSERT(
(aFlags & ~(FLAG_SYNC_DECODE | FLAG_SYNC_DECODE_IF_FAST |
FLAG_ASYNC_NOTIFY | FLAG_HIGH_QUALITY_SCALING)) == FLAG_NONE,
"Unsupported flag passed to GetImageContainer");
ImgDrawResult drawResult;
IntSize size;
Tie(drawResult, size) = GetImageContainerSize(aManager, aSize, aFlags);
if (drawResult != ImgDrawResult::SUCCESS) {
return drawResult;
}
MOZ_ASSERT(!size.IsEmpty());
if (mAnimationConsumers == 0) {
SendOnUnlockedDraw(aFlags);
}
uint32_t flags = (aFlags & ~(FLAG_SYNC_DECODE | FLAG_SYNC_DECODE_IF_FAST)) |
FLAG_ASYNC_NOTIFY;
RefPtr<layers::ImageContainer> container;
ImageContainerEntry* entry = nullptr;
int i = mImageContainers.Length() - 1;
for (; i >= 0; --i) {
entry = &mImageContainers[i];
if (size == entry->mSize && flags == entry->mFlags &&
aSVGContext == entry->mSVGContext) {
// Lack of a container is handled below.
container = RefPtr<layers::ImageContainer>(entry->mContainer);
break;
} else if (!entry->mContainer) {
// Stop tracking if our weak pointer to the image container was freed.
mImageContainers.RemoveElementAt(i);
}
}
if (container) {
switch (entry->mLastDrawResult) {
case ImgDrawResult::SUCCESS:
case ImgDrawResult::BAD_IMAGE:
case ImgDrawResult::BAD_ARGS:
case ImgDrawResult::NOT_SUPPORTED:
container.forget(aOutContainer);
return entry->mLastDrawResult;
case ImgDrawResult::NOT_READY:
case ImgDrawResult::INCOMPLETE:
case ImgDrawResult::TEMPORARY_ERROR:
// Temporary conditions where we need to rerequest the frame to recover.
break;
case ImgDrawResult::WRONG_SIZE:
// Unused by GetFrameInternal
default:
MOZ_ASSERT_UNREACHABLE("Unhandled ImgDrawResult type!");
container.forget(aOutContainer);
return entry->mLastDrawResult;
}
}
#ifdef DEBUG
NotifyDrawingObservers();
#endif
IntSize bestSize;
RefPtr<SourceSurface> surface;
Tie(drawResult, bestSize, surface) = GetFrameInternal(
size, aSVGContext, FRAME_CURRENT, aFlags | FLAG_ASYNC_NOTIFY);
// The requested size might be refused by the surface cache (i.e. due to
// factor-of-2 mode). In that case we don't want to create an entry for this
// specific size, but rather re-use the entry for the substituted size.
if (bestSize != size) {
MOZ_ASSERT(!bestSize.IsEmpty());
// We can only remove the entry if we no longer have a container, because if
// there are strong references to it remaining, we need to still update it
// in UpdateImageContainer.
if (i >= 0 && !container) {
mImageContainers.RemoveElementAt(i);
}
// Forget about the stale container, if any. This lets the entry creation
// logic do its job below, if it turns out there is no existing best entry
// or the best entry doesn't have a container.
container = nullptr;
// We need to do the entry search again for the new size. We skip pruning
// because we did this above once already, but ImageContainer is threadsafe,
// so there is a remote possibility it got freed.
i = mImageContainers.Length() - 1;
for (; i >= 0; --i) {
entry = &mImageContainers[i];
if (bestSize == entry->mSize && flags == entry->mFlags &&
aSVGContext == entry->mSVGContext) {
container = RefPtr<layers::ImageContainer>(entry->mContainer);
if (container) {
switch (entry->mLastDrawResult) {
case ImgDrawResult::SUCCESS:
case ImgDrawResult::BAD_IMAGE:
case ImgDrawResult::BAD_ARGS:
case ImgDrawResult::NOT_SUPPORTED:
container.forget(aOutContainer);
return entry->mLastDrawResult;
case ImgDrawResult::NOT_READY:
case ImgDrawResult::INCOMPLETE:
case ImgDrawResult::TEMPORARY_ERROR:
// Temporary conditions where we need to rerequest the frame to
// recover. We have already done so!
break;
case ImgDrawResult::WRONG_SIZE:
// Unused by GetFrameInternal
default:
MOZ_ASSERT_UNREACHABLE("Unhandled DrawResult type!");
container.forget(aOutContainer);
return entry->mLastDrawResult;
}
}
break;
}
}
}
if (!container) {
// We need a new ImageContainer, so create one.
container = LayerManager::CreateImageContainer();
if (i >= 0) {
entry->mContainer = container;
} else {
entry = mImageContainers.AppendElement(
ImageContainerEntry(bestSize, aSVGContext, container.get(), flags));
}
}
SetCurrentImage(container, surface, Nothing());
entry->mLastDrawResult = drawResult;
container.forget(aOutContainer);
return drawResult;
}
bool ImageResource::UpdateImageContainer(const Maybe<IntRect>& aDirtyRect) {
MOZ_ASSERT(NS_IsMainThread());
for (int i = mImageContainers.Length() - 1; i >= 0; --i) {
ImageContainerEntry& entry = mImageContainers[i];
RefPtr<layers::ImageContainer> container(entry.mContainer);
if (container) {
IntSize bestSize;
RefPtr<SourceSurface> surface;
Tie(entry.mLastDrawResult, bestSize, surface) = GetFrameInternal(
entry.mSize, entry.mSVGContext, FRAME_CURRENT, entry.mFlags);
// It is possible that this is a factor-of-2 substitution. Since we
// managed to convert the weak reference into a strong reference, that
// means that an imagelib user still is holding onto the container. thus
// we cannot consolidate and must keep updating the duplicate container.
if (aDirtyRect) {
SetCurrentImage(container, surface, aDirtyRect);
} else {
IntRect dirtyRect(IntPoint(0, 0), bestSize);
SetCurrentImage(container, surface, Some(dirtyRect));
}
} else {
// Stop tracking if our weak pointer to the image container was freed.
mImageContainers.RemoveElementAt(i);
}
}
return !mImageContainers.IsEmpty();
}
void ImageResource::ReleaseImageContainer() {
MOZ_ASSERT(NS_IsMainThread());
mImageContainers.Clear();
}
// Constructor
ImageResource::ImageResource(nsIURI* aURI)
: mURI(aURI),
mInnerWindowId(0),
mAnimationConsumers(0),
mAnimationMode(kNormalAnimMode),
mInitialized(false),
mAnimating(false),
mError(false),
mImageProducerID(ImageContainer::AllocateProducerID()),
mLastFrameID(0) {}
ImageResource::~ImageResource() {
// Ask our ProgressTracker to drop its weak reference to us.
mProgressTracker->ResetImage();
}
void ImageResource::IncrementAnimationConsumers() {
MOZ_ASSERT(NS_IsMainThread(),
"Main thread only to encourage serialization "
"with DecrementAnimationConsumers");
mAnimationConsumers++;
}
void ImageResource::DecrementAnimationConsumers() {
MOZ_ASSERT(NS_IsMainThread(),
"Main thread only to encourage serialization "
"with IncrementAnimationConsumers");
MOZ_ASSERT(mAnimationConsumers >= 1, "Invalid no. of animation consumers!");
mAnimationConsumers--;
}
nsresult ImageResource::GetAnimationModeInternal(uint16_t* aAnimationMode) {
if (mError) {
return NS_ERROR_FAILURE;
}
NS_ENSURE_ARG_POINTER(aAnimationMode);
*aAnimationMode = mAnimationMode;
return NS_OK;
}
nsresult ImageResource::SetAnimationModeInternal(uint16_t aAnimationMode) {
if (mError) {
return NS_ERROR_FAILURE;
}
NS_ASSERTION(aAnimationMode == kNormalAnimMode ||
aAnimationMode == kDontAnimMode ||
aAnimationMode == kLoopOnceAnimMode,
"Wrong Animation Mode is being set!");
mAnimationMode = aAnimationMode;
return NS_OK;
}
bool ImageResource::HadRecentRefresh(const TimeStamp& aTime) {
// Our threshold for "recent" is 1/2 of the default refresh-driver interval.
// This ensures that we allow for frame rates at least as fast as the
// refresh driver's default rate.
static TimeDuration recentThreshold =
TimeDuration::FromMilliseconds(nsRefreshDriver::DefaultInterval() / 2.0);
if (!mLastRefreshTime.IsNull() &&
aTime - mLastRefreshTime < recentThreshold) {
return true;
}
// else, we can proceed with a refresh.
// But first, update our last refresh time:
mLastRefreshTime = aTime;
return false;
}
void ImageResource::EvaluateAnimation() {
if (!mAnimating && ShouldAnimate()) {
nsresult rv = StartAnimation();
mAnimating = NS_SUCCEEDED(rv);
} else if (mAnimating && !ShouldAnimate()) {
StopAnimation();
}
}
void ImageResource::SendOnUnlockedDraw(uint32_t aFlags) {
if (!mProgressTracker) {
return;
}
if (!(aFlags & FLAG_ASYNC_NOTIFY)) {
mProgressTracker->OnUnlockedDraw();
} else {
NotNull<RefPtr<ImageResource>> image = WrapNotNull(this);
nsCOMPtr<nsIEventTarget> eventTarget = mProgressTracker->GetEventTarget();
nsCOMPtr<nsIRunnable> ev = NS_NewRunnableFunction(
"image::ImageResource::SendOnUnlockedDraw", [=]() -> void {
RefPtr<ProgressTracker> tracker = image->GetProgressTracker();
if (tracker) {
tracker->OnUnlockedDraw();
}
});
eventTarget->Dispatch(CreateMediumHighRunnable(ev.forget()),
NS_DISPATCH_NORMAL);
}
}
#ifdef DEBUG
void ImageResource::NotifyDrawingObservers() {
if (!mURI || !NS_IsMainThread()) {
return;
}
if (!mURI->SchemeIs("resource") && !mURI->SchemeIs("chrome")) {
return;
}
// Record the image drawing for startup performance testing.
nsCOMPtr<nsIURI> uri = mURI;
nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
"image::ImageResource::NotifyDrawingObservers", [uri]() {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
NS_WARNING_ASSERTION(obs, "Can't get an observer service handle");
if (obs) {
nsAutoCString spec;
uri->GetSpec(spec);
obs->NotifyObservers(nullptr, "image-drawing",
NS_ConvertUTF8toUTF16(spec).get());
}
}));
}
#endif
} // namespace image
} // namespace mozilla
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