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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /image/Image.h
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Add m-esr52 at 52.6.0
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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/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;
+
+ virtual void ReportUseCounters() { }
+};
+
+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