RandomHuman
/
Mypal
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Mypal/image/Image.h

322 lines
10 KiB
C++
Raw Permalink Blame History

/* -*- 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/MemoryReporting.h"
#include "mozilla/TimeStamp.h"
#include "gfx2DGlue.h"
#include "imgIContainer.h"
#include "ImageURL.h"
#include "nsStringFwd.h"
#include "ProgressTracker.h"
#include "SurfaceCache.h"
class nsIRequest;
class nsIInputStream;
namespace mozilla {
namespace image {
class Image;
///////////////////////////////////////////////////////////////////////////////
// Memory Reporting
///////////////////////////////////////////////////////////////////////////////
struct MemoryCounter
{
MemoryCounter()
: mSource(0)
, mDecodedHeap(0)
, mDecodedNonHeap(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; }
MemoryCounter& operator+=(const MemoryCounter& aOther)
{
mSource += aOther.mSource;
mDecodedHeap += aOther.mDecodedHeap;
mDecodedNonHeap += aOther.mDecodedNonHeap;
return *this;
}
private:
size_t mSource;
size_t mDecodedHeap;
size_t mDecodedNonHeap;
};
enum class SurfaceMemoryCounterType
{
NORMAL,
COMPOSITING,
COMPOSITING_PREV
};
struct SurfaceMemoryCounter
{
SurfaceMemoryCounter(const SurfaceKey& aKey,
bool aIsLocked,
SurfaceMemoryCounterType aType =
SurfaceMemoryCounterType::NORMAL)
: mKey(aKey)
, mType(aType)
, mIsLocked(aIsLocked)
{ }
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; }
private:
const SurfaceKey mKey;
MemoryCounter mValues;
const SurfaceMemoryCounterType mType;
const bool mIsLocked;
};
struct ImageMemoryCounter
{
ImageMemoryCounter(Image* aImage,
MallocSizeOf aMallocSizeOf,
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; }
uint16_t Type() const { return mType; }
bool IsUsed() const { return mIsUsed; }
bool IsNotable() const
{
const size_t NotableThreshold = 16 * 1024;
size_t total = mValues.Source() + mValues.DecodedHeap()
+ mValues.DecodedNonHeap();
return total >= NotableThreshold;
}
private:
nsCString mURI;
nsTArray<SurfaceMemoryCounter> mSurfaces;
gfx::IntSize mIntrinsicSize;
MemoryCounter mValues;
uint16_t mType;
const bool mIsUsed;
};
///////////////////////////////////////////////////////////////////////////////
// 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(MallocSizeOf aMallocSizeOf) 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() = 0;
virtual void SetInnerWindowID(uint64_t aInnerWindowId) = 0;
virtual uint64_t InnerWindowID() const = 0;
virtual bool HasError() = 0;
virtual void SetHasError() = 0;
virtual ImageURL* GetURI() = 0;
};
class ImageResource : public Image
{
public:
already_AddRefed<ProgressTracker> GetProgressTracker() override
{
RefPtr<ProgressTracker> progressTracker = mProgressTracker;
MOZ_ASSERT(progressTracker);
return progressTracker.forget();
}
void SetProgressTracker(
ProgressTracker* aProgressTracker) override 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() 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.
*/
virtual ImageURL* GetURI() override { return mURI.get(); }
protected:
explicit ImageResource(ImageURL* aURI);
~ImageResource();
// 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;
// Member data shared by all implementations of this abstract class
RefPtr<ProgressTracker> mProgressTracker;
RefPtr<ImageURL> mURI;
TimeStamp mLastRefreshTime;
uint64_t mInnerWindowId;
uint32_t mAnimationConsumers;
uint16_t mAnimationMode; // Enum values in imgIContainer
bool mInitialized:1; // Have we been initalized?
bool mAnimating:1; // Are we currently animating?
bool mError:1; // Error handling
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_Image_h
Reference in New Issue View Git Blame Copy Permalink