Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 628 insertions, 0 deletions

diff --git a/image/Decoder.h b/image/Decoder.h
new file mode 100644
index 0000000000..f8d628b45f
--- /dev/null
+++ b/image/Decoder.h
@@ -0,0 +1,628 @@
+/* -*- 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_Decoder_h
+#define mozilla_image_Decoder_h
+
+#include "FrameAnimator.h"
+#include "RasterImage.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/NotNull.h"
+#include "mozilla/RefPtr.h"
+#include "AnimationParams.h"
+#include "DecoderFlags.h"
+#include "ImageMetadata.h"
+#include "Orientation.h"
+#include "SourceBuffer.h"
+#include "StreamingLexer.h"
+#include "SurfaceFlags.h"
+#include "qcms.h"
+
+namespace mozilla {
+
+namespace Telemetry {
+enum HistogramID : uint32_t;
+}  // namespace Telemetry
+
+namespace image {
+
+class imgFrame;
+
+struct DecoderFinalStatus final {
+  DecoderFinalStatus(bool aWasMetadataDecode, bool aFinished, bool aHadError,
+                     bool aShouldReportError)
+      : mWasMetadataDecode(aWasMetadataDecode),
+        mFinished(aFinished),
+        mHadError(aHadError),
+        mShouldReportError(aShouldReportError) {}
+
+  /// True if this was a metadata decode.
+  const bool mWasMetadataDecode : 1;
+
+  /// True if this decoder finished, whether successfully or due to failure.
+  const bool mFinished : 1;
+
+  /// True if this decoder encountered an error.
+  const bool mHadError : 1;
+
+  /// True if this decoder encountered the kind of error that should be reported
+  /// to the console.
+  const bool mShouldReportError : 1;
+};
+
+struct DecoderTelemetry final {
+  DecoderTelemetry(const Maybe<Telemetry::HistogramID>& aSpeedHistogram,
+                   size_t aBytesDecoded, uint32_t aChunkCount,
+                   TimeDuration aDecodeTime)
+      : mSpeedHistogram(aSpeedHistogram),
+        mBytesDecoded(aBytesDecoded),
+        mChunkCount(aChunkCount),
+        mDecodeTime(aDecodeTime) {}
+
+  /// @return our decoder's speed, in KBps.
+  int32_t Speed() const {
+    return mBytesDecoded / (1024 * mDecodeTime.ToSeconds());
+  }
+
+  /// @return our decoder's decode time, in microseconds.
+  int32_t DecodeTimeMicros() { return mDecodeTime.ToMicroseconds(); }
+
+  /// The per-image-format telemetry ID for recording our decoder's speed, or
+  /// Nothing() if we don't record speed telemetry for this kind of decoder.
+  const Maybe<Telemetry::HistogramID> mSpeedHistogram;
+
+  /// The number of bytes of input our decoder processed.
+  const size_t mBytesDecoded;
+
+  /// The number of chunks our decoder's input was divided into.
+  const uint32_t mChunkCount;
+
+  /// The amount of time our decoder spent inside DoDecode().
+  const TimeDuration mDecodeTime;
+};
+
+/**
+ * Interface which owners of an animated Decoder object must implement in order
+ * to use recycling. It allows the decoder to get a handle to the recycled
+ * frames.
+ */
+class IDecoderFrameRecycler {
+ public:
+  /**
+   * Request the next available recycled imgFrame from the recycler.
+   *
+   * @param aRecycleRect  If a frame is returned, this must be set to the
+   *                      accumulated dirty rect between the frame being
+   *                      recycled, and the frame being generated.
+   *
+   * @returns The recycled frame, if any is available.
+   */
+  virtual RawAccessFrameRef RecycleFrame(gfx::IntRect& aRecycleRect) = 0;
+};
+
+class Decoder {
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Decoder)
+
+  explicit Decoder(RasterImage* aImage);
+
+  /**
+   * Initialize an image decoder. Decoders may not be re-initialized.
+   *
+   * @return NS_OK if the decoder could be initialized successfully.
+   */
+  nsresult Init();
+
+  /**
+   * Decodes, reading all data currently available in the SourceBuffer.
+   *
+   * If more data is needed and @aOnResume is non-null, Decode() will schedule
+   * @aOnResume to be called when more data is available.
+   *
+   * @return a LexerResult which may indicate:
+   *   - the image has been successfully decoded (TerminalState::SUCCESS), or
+   *   - the image has failed to decode (TerminalState::FAILURE), or
+   *   - the decoder is yielding until it gets more data
+   *     (Yield::NEED_MORE_DATA), or
+   *   - the decoder is yielding to allow the caller to access intermediate
+   *     output (Yield::OUTPUT_AVAILABLE).
+   */
+  LexerResult Decode(IResumable* aOnResume = nullptr);
+
+  /**
+   * Terminate this decoder in a failure state, just as if the decoder
+   * implementation had returned TerminalState::FAILURE from DoDecode().
+   *
+   * XXX(seth): This method should be removed ASAP; it exists only because
+   * RasterImage::FinalizeDecoder() requires an actual Decoder object as an
+   * argument, so we can't simply tell RasterImage a decode failed except via an
+   * intervening decoder. We'll fix this in bug 1291071.
+   */
+  LexerResult TerminateFailure();
+
+  /**
+   * Given a maximum number of bytes we're willing to decode, @aByteLimit,
+   * returns true if we should attempt to run this decoder synchronously.
+   */
+  bool ShouldSyncDecode(size_t aByteLimit);
+
+  /**
+   * Gets the invalidation region accumulated by the decoder so far, and clears
+   * the decoder's invalidation region. This means that each call to
+   * TakeInvalidRect() returns only the invalidation region accumulated since
+   * the last call to TakeInvalidRect().
+   */
+  nsIntRect TakeInvalidRect() {
+    nsIntRect invalidRect = mInvalidRect;
+    mInvalidRect.SetEmpty();
+    return invalidRect;
+  }
+
+  /**
+   * Gets the progress changes accumulated by the decoder so far, and clears
+   * them. This means that each call to TakeProgress() returns only the changes
+   * accumulated since the last call to TakeProgress().
+   */
+  Progress TakeProgress() {
+    Progress progress = mProgress;
+    mProgress = NoProgress;
+    return progress;
+  }
+
+  /**
+   * Returns true if there's any progress to report.
+   */
+  bool HasProgress() const {
+    return mProgress != NoProgress || !mInvalidRect.IsEmpty() ||
+           mFinishedNewFrame;
+  }
+
+  /*
+   * State.
+   */
+
+  /**
+   * If we're doing a metadata decode, we only decode the image's headers, which
+   * is enough to determine the image's intrinsic size. A metadata decode is
+   * enabled by calling SetMetadataDecode() *before* calling Init().
+   */
+  void SetMetadataDecode(bool aMetadataDecode) {
+    MOZ_ASSERT(!mInitialized, "Shouldn't be initialized yet");
+    mMetadataDecode = aMetadataDecode;
+  }
+  bool IsMetadataDecode() const { return mMetadataDecode; }
+
+  /**
+   * Sets the output size of this decoder. If this is smaller than the intrinsic
+   * size of the image, we'll downscale it while decoding. For memory usage
+   * reasons, upscaling is forbidden and will trigger assertions in debug
+   * builds.
+   *
+   * Not calling SetOutputSize() means that we should just decode at the
+   * intrinsic size, whatever it is.
+   *
+   * If SetOutputSize() was called, ExplicitOutputSize() can be used to
+   * determine the value that was passed to it.
+   *
+   * This must be called before Init() is called.
+   */
+  void SetOutputSize(const gfx::IntSize& aSize);
+
+  /**
+   * @return the output size of this decoder. If this is smaller than the
+   * intrinsic size, then the image will be downscaled during the decoding
+   * process.
+   *
+   * Illegal to call if HasSize() returns false.
+   */
+  gfx::IntSize OutputSize() const {
+    MOZ_ASSERT(HasSize());
+    return *mOutputSize;
+  }
+
+  /**
+   * @return either the size passed to SetOutputSize() or Nothing(), indicating
+   * that SetOutputSize() was not explicitly called.
+   */
+  Maybe<gfx::IntSize> ExplicitOutputSize() const;
+
+  /**
+   * Sets the expected image size of this decoder. Decoding will fail if this
+   * does not match.
+   */
+  void SetExpectedSize(const gfx::IntSize& aSize) {
+    mExpectedSize.emplace(aSize);
+  }
+
+  /**
+   * Is the image size what was expected, if specified?
+   */
+  bool IsExpectedSize() const {
+    return mExpectedSize.isNothing() || *mExpectedSize == Size();
+  }
+
+  /**
+   * Set an iterator to the SourceBuffer which will feed data to this decoder.
+   * This must always be called before calling Init(). (And only before Init().)
+   *
+   * XXX(seth): We should eliminate this method and pass a SourceBufferIterator
+   * to the various decoder constructors instead.
+   */
+  void SetIterator(SourceBufferIterator&& aIterator) {
+    MOZ_ASSERT(!mInitialized, "Shouldn't be initialized yet");
+    mIterator.emplace(std::move(aIterator));
+  }
+
+  SourceBuffer* GetSourceBuffer() const { return mIterator->Owner(); }
+
+  /**
+   * Should this decoder send partial invalidations?
+   */
+  bool ShouldSendPartialInvalidations() const {
+    return !(mDecoderFlags & DecoderFlags::IS_REDECODE);
+  }
+
+  /**
+   * Should we stop decoding after the first frame?
+   */
+  bool IsFirstFrameDecode() const {
+    return bool(mDecoderFlags & DecoderFlags::FIRST_FRAME_ONLY);
+  }
+
+  /**
+   * @return the number of complete animation frames which have been decoded so
+   * far, if it has changed since the last call to TakeCompleteFrameCount();
+   * otherwise, returns Nothing().
+   */
+  Maybe<uint32_t> TakeCompleteFrameCount();
+
+  // The number of frames we have, including anything in-progress. Thus, this
+  // is only 0 if we haven't begun any frames.
+  uint32_t GetFrameCount() { return mFrameCount; }
+
+  // Did we discover that the image we're decoding is animated?
+  bool HasAnimation() const { return mImageMetadata.HasAnimation(); }
+
+  // Error tracking
+  bool HasError() const { return mError; }
+  bool ShouldReportError() const { return mShouldReportError; }
+
+  // Finalize frames
+  void SetFinalizeFrames(bool aFinalize) { mFinalizeFrames = aFinalize; }
+  bool GetFinalizeFrames() const { return mFinalizeFrames; }
+
+  /// Did we finish decoding enough that calling Decode() again would be
+  /// useless?
+  bool GetDecodeDone() const {
+    return mReachedTerminalState || mDecodeDone ||
+           (mMetadataDecode && HasSize()) || HasError();
+  }
+
+  /// Are we in the middle of a frame right now? Used for assertions only.
+  bool InFrame() const { return mInFrame; }
+
+  /// Is the image valid if embedded inside an ICO.
+  virtual bool IsValidICOResource() const { return false; }
+
+  /// Type of decoder.
+  virtual DecoderType GetType() const { return DecoderType::UNKNOWN; }
+
+  enum DecodeStyle {
+    PROGRESSIVE,  // produce intermediate frames representing the partial
+                  // state of the image
+    SEQUENTIAL    // decode to final image immediately
+  };
+
+  /**
+   * Get or set the DecoderFlags that influence the behavior of this decoder.
+   */
+  void SetDecoderFlags(DecoderFlags aDecoderFlags) {
+    MOZ_ASSERT(!mInitialized);
+    mDecoderFlags = aDecoderFlags;
+  }
+  DecoderFlags GetDecoderFlags() const { return mDecoderFlags; }
+
+  /**
+   * Get or set the SurfaceFlags that select the kind of output this decoder
+   * will produce.
+   */
+  void SetSurfaceFlags(SurfaceFlags aSurfaceFlags);
+  SurfaceFlags GetSurfaceFlags() const { return mSurfaceFlags; }
+
+  /// @return true if we know the intrinsic size of the image we're decoding.
+  bool HasSize() const { return mImageMetadata.HasSize(); }
+
+  /**
+   * @return the intrinsic size of the image we're decoding.
+   *
+   * Illegal to call if HasSize() returns false.
+   */
+  gfx::IntSize Size() const {
+    MOZ_ASSERT(HasSize());
+    return mImageMetadata.GetSize();
+  }
+
+  /**
+   * @return an IntRect which covers the entire area of this image at its
+   * intrinsic size, appropriate for use as a frame rect when the image itself
+   * does not specify one.
+   *
+   * Illegal to call if HasSize() returns false.
+   */
+  gfx::IntRect FullFrame() const {
+    return gfx::IntRect(gfx::IntPoint(), Size());
+  }
+
+  /**
+   * @return an IntRect which covers the entire area of this image at its size
+   * after scaling - that is, at its output size.
+   *
+   * XXX(seth): This is only used for decoders which are using the old
+   * Downscaler code instead of SurfacePipe, since the old AllocateFrame() and
+   * Downscaler APIs required that the frame rect be specified in output space.
+   * We should remove this once all decoders use SurfacePipe.
+   *
+   * Illegal to call if HasSize() returns false.
+   */
+  gfx::IntRect FullOutputFrame() const {
+    return gfx::IntRect(gfx::IntPoint(), OutputSize());
+  }
+
+  /// @return final status information about this decoder. Should be called
+  /// after we decide we're not going to run the decoder anymore.
+  DecoderFinalStatus FinalStatus() const;
+
+  /// @return the metadata we collected about this image while decoding.
+  const ImageMetadata& GetImageMetadata() { return mImageMetadata; }
+
+  /// @return performance telemetry we collected while decoding.
+  DecoderTelemetry Telemetry() const;
+
+  /**
+   * @return a weak pointer to the image associated with this decoder. Illegal
+   * to call if this decoder is not associated with an image.
+   */
+  NotNull<RasterImage*> GetImage() const { return WrapNotNull(mImage.get()); }
+
+  /**
+   * @return a possibly-null weak pointer to the image associated with this
+   * decoder. May be called even if this decoder is not associated with an
+   * image.
+   */
+  RasterImage* GetImageMaybeNull() const { return mImage.get(); }
+
+  RawAccessFrameRef GetCurrentFrameRef() {
+    return mCurrentFrame ? mCurrentFrame->RawAccessRef() : RawAccessFrameRef();
+  }
+
+  /**
+   * For use during decoding only. Allows the BlendAnimationFilter to get the
+   * current frame we are producing for its animation parameters.
+   */
+  imgFrame* GetCurrentFrame() { return mCurrentFrame.get(); }
+
+  /**
+   * For use during decoding only. Allows the BlendAnimationFilter to get the
+   * frame it should be pulling the previous frame data from.
+   */
+  const RawAccessFrameRef& GetRestoreFrameRef() const { return mRestoreFrame; }
+
+  const gfx::IntRect& GetRestoreDirtyRect() const { return mRestoreDirtyRect; }
+
+  const gfx::IntRect& GetRecycleRect() const { return mRecycleRect; }
+
+  const gfx::IntRect& GetFirstFrameRefreshArea() const {
+    return mFirstFrameRefreshArea;
+  }
+
+  bool HasFrameToTake() const { return mHasFrameToTake; }
+  void ClearHasFrameToTake() {
+    MOZ_ASSERT(mHasFrameToTake);
+    mHasFrameToTake = false;
+  }
+
+  IDecoderFrameRecycler* GetFrameRecycler() const { return mFrameRecycler; }
+  void SetFrameRecycler(IDecoderFrameRecycler* aFrameRecycler) {
+    mFrameRecycler = aFrameRecycler;
+  }
+
+ protected:
+  friend class AutoRecordDecoderTelemetry;
+  friend class DecoderTestHelper;
+  friend class nsBMPDecoder;
+  friend class nsICODecoder;
+  friend class PalettedSurfaceSink;
+  friend class SurfaceSink;
+
+  virtual ~Decoder();
+
+  /*
+   * Internal hooks. Decoder implementations may override these and
+   * only these methods.
+   *
+   * BeforeFinishInternal() can be used to detect if decoding is in an
+   * incomplete state, e.g. due to file truncation, in which case it should
+   * return a failing nsresult.
+   */
+  virtual nsresult InitInternal();
+  virtual LexerResult DoDecode(SourceBufferIterator& aIterator,
+                               IResumable* aOnResume) = 0;
+  virtual nsresult BeforeFinishInternal();
+  virtual nsresult FinishInternal();
+  virtual nsresult FinishWithErrorInternal();
+
+  qcms_profile* GetCMSOutputProfile() const;
+  qcms_transform* GetCMSsRGBTransform(gfx::SurfaceFormat aFormat) const;
+
+  /**
+   * @return the per-image-format telemetry ID for recording this decoder's
+   * speed, or Nothing() if we don't record speed telemetry for this kind of
+   * decoder.
+   */
+  virtual Maybe<Telemetry::HistogramID> SpeedHistogram() const {
+    return Nothing();
+  }
+
+  /*
+   * Progress notifications.
+   */
+
+  // Called by decoders when they determine the size of the image. Informs
+  // the image of its size and sends notifications.
+  void PostSize(int32_t aWidth, int32_t aHeight,
+                Orientation aOrientation = Orientation());
+
+  // Called by decoders if they determine that the image has transparency.
+  //
+  // This should be fired as early as possible to allow observers to do things
+  // that affect content, so it's necessarily pessimistic - if there's a
+  // possibility that the image has transparency, for example because its header
+  // specifies that it has an alpha channel, we fire PostHasTransparency
+  // immediately. PostFrameStop's aFrameOpacity argument, on the other hand, is
+  // only used internally to ImageLib. Because PostFrameStop isn't delivered
+  // until the entire frame has been decoded, decoders may take into account the
+  // actual contents of the frame and give a more accurate result.
+  void PostHasTransparency();
+
+  // Called by decoders if they determine that the image is animated.
+  //
+  // @param aTimeout The time for which the first frame should be shown before
+  //                 we advance to the next frame.
+  void PostIsAnimated(FrameTimeout aFirstFrameTimeout);
+
+  // Called by decoders when they end a frame. Informs the image, sends
+  // notifications, and does internal book-keeping.
+  // Specify whether this frame is opaque as an optimization.
+  // For animated images, specify the disposal, blend method and timeout for
+  // this frame.
+  void PostFrameStop(Opacity aFrameOpacity = Opacity::SOME_TRANSPARENCY);
+
+  /**
+   * Called by the decoders when they have a region to invalidate. We may not
+   * actually pass these invalidations on right away.
+   *
+   * @param aRect The invalidation rect in the coordinate system of the unscaled
+   *              image (that is, the image at its intrinsic size).
+   * @param aRectAtOutputSize If not Nothing(), the invalidation rect in the
+   *                          coordinate system of the scaled image (that is,
+   *                          the image at our output size). This must
+   *                          be supplied if we're downscaling during decode.
+   */
+  void PostInvalidation(
+      const gfx::IntRect& aRect,
+      const Maybe<gfx::IntRect>& aRectAtOutputSize = Nothing());
+
+  // Called by the decoders when they have successfully decoded the image. This
+  // may occur as the result of the decoder getting to the appropriate point in
+  // the stream, or by us calling FinishInternal().
+  //
+  // May not be called mid-frame.
+  //
+  // For animated images, specify the loop count. -1 means loop forever, 0
+  // means a single iteration, stopping on the last frame.
+  void PostDecodeDone(int32_t aLoopCount = 0);
+
+  /**
+   * Allocates a new frame, making it our current frame if successful.
+   */
+  nsresult AllocateFrame(const gfx::IntSize& aOutputSize,
+                         gfx::SurfaceFormat aFormat,
+                         const Maybe<AnimationParams>& aAnimParams = Nothing());
+
+ private:
+  /// Report that an error was encountered while decoding.
+  void PostError();
+
+  /**
+   * CompleteDecode() finishes up the decoding process after Decode() determines
+   * that we're finished. It records final progress and does all the cleanup
+   * that's possible off-main-thread.
+   */
+  void CompleteDecode();
+
+  /// @return the number of complete frames we have. Does not include the
+  /// current frame if it's unfinished.
+  uint32_t GetCompleteFrameCount() {
+    if (mFrameCount == 0) {
+      return 0;
+    }
+
+    return mInFrame ? mFrameCount - 1 : mFrameCount;
+  }
+
+  RawAccessFrameRef AllocateFrameInternal(
+      const gfx::IntSize& aOutputSize, gfx::SurfaceFormat aFormat,
+      const Maybe<AnimationParams>& aAnimParams,
+      RawAccessFrameRef&& aPreviousFrame);
+
+ protected:
+  /// Color management profile from the ICCP chunk in the image.
+  qcms_profile* mInProfile;
+
+  /// Color management transform to apply to image data.
+  qcms_transform* mTransform;
+
+  uint8_t* mImageData;  // Pointer to image data in BGRA/X
+  uint32_t mImageDataLength;
+
+  uint32_t mCMSMode;
+
+ private:
+  RefPtr<RasterImage> mImage;
+  Maybe<SourceBufferIterator> mIterator;
+  IDecoderFrameRecycler* mFrameRecycler;
+
+  // The current frame the decoder is producing.
+  RawAccessFrameRef mCurrentFrame;
+
+  // The complete frame to combine with the current partial frame to produce
+  // a complete current frame.
+  RawAccessFrameRef mRestoreFrame;
+
+  ImageMetadata mImageMetadata;
+
+  gfx::IntRect
+      mInvalidRect;  // Tracks new rows as the current frame is decoded.
+  gfx::IntRect mRestoreDirtyRect;   // Tracks an invalidation region between the
+                                    // restore frame and the previous frame.
+  gfx::IntRect mRecycleRect;        // Tracks an invalidation region between the
+                                    // recycled frame and the current frame.
+  Maybe<gfx::IntSize> mOutputSize;  // The size of our output surface.
+  Maybe<gfx::IntSize> mExpectedSize;  // The expected size of the image.
+  Progress mProgress;
+
+  uint32_t mFrameCount;      // Number of frames, including anything in-progress
+  FrameTimeout mLoopLength;  // Length of a single loop of this image.
+  gfx::IntRect
+      mFirstFrameRefreshArea;  // The area of the image that needs to
+                               // be invalidated when the animation loops.
+
+  // Telemetry data for this decoder.
+  TimeDuration mDecodeTime;
+
+  DecoderFlags mDecoderFlags;
+  SurfaceFlags mSurfaceFlags;
+
+  bool mInitialized : 1;
+  bool mMetadataDecode : 1;
+  bool mHaveExplicitOutputSize : 1;
+  bool mInFrame : 1;
+  bool mFinishedNewFrame : 1;  // True if PostFrameStop() has been called since
+                               // the last call to TakeCompleteFrameCount().
+  // Has a new frame that AnimationSurfaceProvider can take. Unfortunately this
+  // has to be separate from mFinishedNewFrame because the png decoder yields a
+  // new frame before calling PostFrameStop().
+  bool mHasFrameToTake : 1;
+  bool mReachedTerminalState : 1;
+  bool mDecodeDone : 1;
+  bool mError : 1;
+  bool mShouldReportError : 1;
+  bool mFinalizeFrames : 1;
+};
+
+}  // namespace image
+}  // namespace mozilla
+
+#endif  // mozilla_image_Decoder_h