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gecko-dev/image/Image.h

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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/. */
#ifndef mozilla_image_Image_h
#define mozilla_image_Image_h
#include "mozilla/Maybe.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/ThreadSafeWeakPtr.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Tuple.h"
#include "gfx2DGlue.h"
#include "imgIContainer.h"
#include "ImageContainer.h"
#include "LookupResult.h"
#include "nsStringFwd.h"
#include "ProgressTracker.h"
#include "SurfaceCache.h"
class imgRequest;
class nsIRequest;
class nsIInputStream;
namespace mozilla {
namespace image {
class Image;
///////////////////////////////////////////////////////////////////////////////
// Memory Reporting
///////////////////////////////////////////////////////////////////////////////
struct MemoryCounter {
MemoryCounter()
: mSource(0),
mDecodedHeap(0),
mDecodedNonHeap(0),
mDecodedUnknown(0),
mExternalHandles(0),
mFrameIndex(0),
mExternalId(0),
mSurfaceTypes(0) {}
void SetSource(size_t aCount) { mSource = aCount; }
size_t Source() const { return mSource; }
void SetDecodedHeap(size_t aCount) { mDecodedHeap = aCount; }
size_t DecodedHeap() const { return mDecodedHeap; }
void SetDecodedNonHeap(size_t aCount) { mDecodedNonHeap = aCount; }
size_t DecodedNonHeap() const { return mDecodedNonHeap; }
void SetDecodedUnknown(size_t aCount) { mDecodedUnknown = aCount; }
size_t DecodedUnknown() const { return mDecodedUnknown; }
void SetExternalHandles(size_t aCount) { mExternalHandles = aCount; }
size_t ExternalHandles() const { return mExternalHandles; }
void SetFrameIndex(size_t aIndex) { mFrameIndex = aIndex; }
size_t FrameIndex() const { return mFrameIndex; }
void SetExternalId(uint64_t aId) { mExternalId = aId; }
uint64_t ExternalId() const { return mExternalId; }
void SetSurfaceTypes(uint32_t aTypes) { mSurfaceTypes = aTypes; }
uint32_t SurfaceTypes() const { return mSurfaceTypes; }
MemoryCounter& operator+=(const MemoryCounter& aOther) {
mSource += aOther.mSource;
mDecodedHeap += aOther.mDecodedHeap;
mDecodedNonHeap += aOther.mDecodedNonHeap;
mDecodedUnknown += aOther.mDecodedUnknown;
mExternalHandles += aOther.mExternalHandles;
mSurfaceTypes |= aOther.mSurfaceTypes;
return *this;
}
private:
size_t mSource;
size_t mDecodedHeap;
size_t mDecodedNonHeap;
size_t mDecodedUnknown;
size_t mExternalHandles;
size_t mFrameIndex;
uint64_t mExternalId;
uint32_t mSurfaceTypes;
};
enum class SurfaceMemoryCounterType { NORMAL, COMPOSITING, COMPOSITING_PREV };
struct SurfaceMemoryCounter {
SurfaceMemoryCounter(
const SurfaceKey& aKey, bool aIsLocked, bool aCannotSubstitute,
bool aIsFactor2, bool aFinished,
SurfaceMemoryCounterType aType = SurfaceMemoryCounterType::NORMAL)
: mKey(aKey),
mType(aType),
mIsLocked(aIsLocked),
mCannotSubstitute(aCannotSubstitute),
mIsFactor2(aIsFactor2),
mFinished(aFinished) {}
const SurfaceKey& Key() const { return mKey; }
MemoryCounter& Values() { return mValues; }
const MemoryCounter& Values() const { return mValues; }
SurfaceMemoryCounterType Type() const { return mType; }
bool IsLocked() const { return mIsLocked; }
bool CannotSubstitute() const { return mCannotSubstitute; }
bool IsFactor2() const { return mIsFactor2; }
bool IsFinished() const { return mFinished; }
private:
const SurfaceKey mKey;
MemoryCounter mValues;
const SurfaceMemoryCounterType mType;
const bool mIsLocked;
const bool mCannotSubstitute;
const bool mIsFactor2;
const bool mFinished;
};
struct ImageMemoryCounter {
ImageMemoryCounter(imgRequest* aRequest, SizeOfState& aState, bool aIsUsed);
ImageMemoryCounter(imgRequest* aRequest, Image* aImage, SizeOfState& aState,
bool aIsUsed);
nsCString& URI() { return mURI; }
const nsCString& URI() const { return mURI; }
const nsTArray<SurfaceMemoryCounter>& Surfaces() const { return mSurfaces; }
const gfx::IntSize IntrinsicSize() const { return mIntrinsicSize; }
const MemoryCounter& Values() const { return mValues; }
uint32_t Progress() const { return mProgress; }
uint16_t Type() const { return mType; }
bool IsUsed() const { return mIsUsed; }
bool HasError() const { return mHasError; }
bool IsValidating() const { return mValidating; }
bool IsNotable() const {
// Errors or requests without images are always notable.
if (mHasError || mValidating || mProgress == UINT32_MAX ||
mProgress & FLAG_HAS_ERROR || mType == imgIContainer::TYPE_REQUEST) {
return true;
}
// Sufficiently large images are notable.
const size_t NotableThreshold = 16 * 1024;
size_t total = mValues.Source() + mValues.DecodedHeap() +
mValues.DecodedNonHeap() + mValues.DecodedUnknown();
if (total >= NotableThreshold) {
return true;
}
// Incomplete images are always notable as well; the odds of capturing
// mid-decode should be fairly low.
for (const auto& surface : mSurfaces) {
if (!surface.IsFinished()) {
return true;
}
}
return false;
}
private:
nsCString mURI;
nsTArray<SurfaceMemoryCounter> mSurfaces;
gfx::IntSize mIntrinsicSize;
MemoryCounter mValues;
uint32_t mProgress;
uint16_t mType;
const bool mIsUsed;
bool mHasError;
bool mValidating;
};
///////////////////////////////////////////////////////////////////////////////
// Image Base Types
///////////////////////////////////////////////////////////////////////////////
class Image : public imgIContainer {
public:
/**
* Flags for Image initialization.
*
* Meanings:
*
* INIT_FLAG_NONE: Lack of flags
*
* INIT_FLAG_DISCARDABLE: The container should be discardable
*
* INIT_FLAG_DECODE_IMMEDIATELY: The container should decode as soon as
* possible, regardless of what our heuristics say.
*
* INIT_FLAG_TRANSIENT: The container is likely to exist for only a short time
* before being destroyed. (For example, containers for
* multipart/x-mixed-replace image parts fall into this category.) If this
* flag is set, INIT_FLAG_DISCARDABLE and INIT_FLAG_DECODE_ONLY_ON_DRAW must
* not be set.
*
* INIT_FLAG_SYNC_LOAD: The container is being loaded synchronously, so
* it should avoid relying on async workers to get the container ready.
*/
static const uint32_t INIT_FLAG_NONE = 0x0;
static const uint32_t INIT_FLAG_DISCARDABLE = 0x1;
static const uint32_t INIT_FLAG_DECODE_IMMEDIATELY = 0x2;
static const uint32_t INIT_FLAG_TRANSIENT = 0x4;
static const uint32_t INIT_FLAG_SYNC_LOAD = 0x8;
virtual already_AddRefed<ProgressTracker> GetProgressTracker() = 0;
virtual void SetProgressTracker(ProgressTracker* aProgressTracker) {}
/**
* The size, in bytes, occupied by the compressed source data of the image.
* If MallocSizeOf does not work on this platform, uses a fallback approach to
* ensure that something reasonable is always returned.
*/
virtual size_t SizeOfSourceWithComputedFallback(
SizeOfState& aState) const = 0;
/**
* Collect an accounting of the memory occupied by the image's surfaces (which
* together make up its decoded data). Each surface is recorded as a separate
* SurfaceMemoryCounter, stored in @aCounters.
*/
virtual void CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
MallocSizeOf aMallocSizeOf) const = 0;
virtual void IncrementAnimationConsumers() = 0;
virtual void DecrementAnimationConsumers() = 0;
#ifdef DEBUG
virtual uint32_t GetAnimationConsumers() = 0;
#endif
/**
* Called from OnDataAvailable when the stream associated with the image has
* received new image data. The arguments are the same as OnDataAvailable's,
* but by separating this functionality into a different method we don't
* interfere with subclasses which wish to implement nsIStreamListener.
*
* Images should not do anything that could send out notifications until they
* have received their first OnImageDataAvailable notification; in
* particular, this means that instantiating decoders should be deferred
* until OnImageDataAvailable is called.
*/
virtual nsresult OnImageDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInStr,
uint64_t aSourceOffset,
uint32_t aCount) = 0;
/**
* Called from OnStopRequest when the image's underlying request completes.
*
* @param aRequest The completed request.
* @param aContext Context from Necko's OnStopRequest.
* @param aStatus A success or failure code.
* @param aLastPart Whether this is the final part of the underlying request.
*/
virtual nsresult OnImageDataComplete(nsIRequest* aRequest,
nsISupports* aContext, nsresult aStatus,
bool aLastPart) = 0;
/**
* Called when the SurfaceCache discards a surface belonging to this image.
*/
virtual void OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey) = 0;
virtual void SetInnerWindowID(uint64_t aInnerWindowId) = 0;
virtual uint64_t InnerWindowID() const = 0;
virtual bool HasError() = 0;
virtual void SetHasError() = 0;
virtual nsIURI* GetURI() const = 0;
NS_IMETHOD GetHotspotX(int32_t* aX) override {
*aX = 0;
return NS_OK;
}
NS_IMETHOD GetHotspotY(int32_t* aY) override {
*aY = 0;
return NS_OK;
}
};
class ImageResource : public Image {
public:
already_AddRefed<ProgressTracker> GetProgressTracker() override {
RefPtr<ProgressTracker> progressTracker = mProgressTracker;
MOZ_ASSERT(progressTracker);
return progressTracker.forget();
}
void SetProgressTracker(ProgressTracker* aProgressTracker) final {
MOZ_ASSERT(aProgressTracker);
MOZ_ASSERT(!mProgressTracker);
mProgressTracker = aProgressTracker;
}
virtual void IncrementAnimationConsumers() override;
virtual void DecrementAnimationConsumers() override;
#ifdef DEBUG
virtual uint32_t GetAnimationConsumers() override {
return mAnimationConsumers;
}
#endif
virtual void OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey) override {}
virtual void SetInnerWindowID(uint64_t aInnerWindowId) override {
mInnerWindowId = aInnerWindowId;
}
virtual uint64_t InnerWindowID() const override { return mInnerWindowId; }
virtual bool HasError() override { return mError; }
virtual void SetHasError() override { mError = true; }
/*
* Returns a non-AddRefed pointer to the URI associated with this image.
* Illegal to use off-main-thread.
*/
nsIURI* GetURI() const override { return mURI; }
protected:
explicit ImageResource(nsIURI* aURI);
~ImageResource();
layers::ContainerProducerID GetImageProducerId() const {
return mImageProducerID;
}
bool GetSpecTruncatedTo1k(nsCString& aSpec) const;
// Shared functionality for implementors of imgIContainer. Every
// implementation of attribute animationMode should forward here.
nsresult GetAnimationModeInternal(uint16_t* aAnimationMode);
nsresult SetAnimationModeInternal(uint16_t aAnimationMode);
/**
* Helper for RequestRefresh.
*
* If we've had a "recent" refresh (i.e. if this image is being used in
* multiple documents & some other document *just* called RequestRefresh() on
* this image with a timestamp close to aTime), this method returns true.
*
* Otherwise, this method updates mLastRefreshTime to aTime & returns false.
*/
bool HadRecentRefresh(const TimeStamp& aTime);
/**
* Decides whether animation should or should not be happening,
* and makes sure the right thing is being done.
*/
virtual void EvaluateAnimation();
/**
* Extended by child classes, if they have additional
* conditions for being able to animate.
*/
virtual bool ShouldAnimate() {
return mAnimationConsumers > 0 && mAnimationMode != kDontAnimMode;
}
virtual nsresult StartAnimation() = 0;
virtual nsresult StopAnimation() = 0;
void SendOnUnlockedDraw(uint32_t aFlags);
#ifdef DEBUG
// Records the image drawing for startup performance testing.
void NotifyDrawingObservers();
#endif
// Member data shared by all implementations of this abstract class
RefPtr<ProgressTracker> mProgressTracker;
nsCOMPtr<nsIURI> mURI;
TimeStamp mLastRefreshTime;
uint64_t mInnerWindowId;
uint32_t mAnimationConsumers;
uint16_t mAnimationMode; // Enum values in imgIContainer
bool mInitialized : 1; // Have we been initialized?
bool mAnimating : 1; // Are we currently animating?
bool mError : 1; // Error handling
/**
* Attempt to find a matching cached surface in the SurfaceCache, and if not
* available, request the production of such a surface (either synchronously
* or asynchronously).
*
* If the draw result is BAD_IMAGE, BAD_ARGS or NOT_READY, the size will be
* the same as aSize. If it is TEMPORARY_ERROR, INCOMPLETE, or SUCCESS, the
* size is a hint as to what we expect the surface size to be, once the best
* fitting size is available. It may or may not match the size of the surface
* returned at this moment. This is useful for choosing how to store the final
* result (e.g. if going into an ImageContainer, ideally we would share the
* same container for many requested sizes, if they all end up with the same
* best fit size in the end).
*
* A valid surface should only be returned for SUCCESS and INCOMPLETE.
*
* Any other draw result is invalid.
*/
virtual Tuple<ImgDrawResult, gfx::IntSize, RefPtr<gfx::SourceSurface>>
GetFrameInternal(const gfx::IntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aWhichFrame, uint32_t aFlags) {
return MakeTuple(ImgDrawResult::BAD_IMAGE, aSize,
RefPtr<gfx::SourceSurface>());
}
/**
* Calculate the estimated size to use for an image container with the given
* parameters. It may not be the same as the given size, and it may not be
* the same as the size of the surface in the image container, but it is the
* best effort estimate.
*/
virtual Tuple<ImgDrawResult, gfx::IntSize> GetImageContainerSize(
layers::LayerManager* aManager, const gfx::IntSize& aSize,
uint32_t aFlags) {
return MakeTuple(ImgDrawResult::NOT_SUPPORTED, gfx::IntSize(0, 0));
}
ImgDrawResult GetImageContainerImpl(layers::LayerManager* aManager,
const gfx::IntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext,
uint32_t aFlags,
layers::ImageContainer** aContainer);
/**
* Re-requests the appropriate frames for each image container using
* GetFrameInternal.
* @returns True if any image containers were updated, else false.
*/
bool UpdateImageContainer(const Maybe<gfx::IntRect>& aDirtyRect);
void ReleaseImageContainer();
private:
void SetCurrentImage(layers::ImageContainer* aContainer,
gfx::SourceSurface* aSurface,
const Maybe<gfx::IntRect>& aDirtyRect);
struct ImageContainerEntry {
ImageContainerEntry(const gfx::IntSize& aSize,
const Maybe<SVGImageContext>& aSVGContext,
layers::ImageContainer* aContainer, uint32_t aFlags)
: mSize(aSize),
mSVGContext(aSVGContext),
mContainer(aContainer),
mLastDrawResult(ImgDrawResult::NOT_READY),
mFlags(aFlags) {}
gfx::IntSize mSize;
Maybe<SVGImageContext> mSVGContext;
// A weak pointer to our ImageContainer, which stays alive only as long as
// the layer system needs it.
ThreadSafeWeakPtr<layers::ImageContainer> mContainer;
// If mContainer is non-null, this contains the ImgDrawResult we obtained
// the last time we updated it.
ImgDrawResult mLastDrawResult;
// Cached flags to use for decoding. FLAG_ASYNC_NOTIFY should always be set
// but FLAG_HIGH_QUALITY_SCALING may vary.
uint32_t mFlags;
};
AutoTArray<ImageContainerEntry, 1> mImageContainers;
layers::ImageContainer::ProducerID mImageProducerID;
layers::ImageContainer::FrameID mLastFrameID;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_Image_h
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