Adding upstream version 110.0.1.upstream/110.0.1upstream

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

1 files changed, 729 insertions, 0 deletions

diff --git a/image/imgFrame.cpp b/image/imgFrame.cpp
new file mode 100644
index 0000000000..4ff6dcec19
--- /dev/null
+++ b/image/imgFrame.cpp
@@ -0,0 +1,729 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "imgFrame.h"
+#include "ImageRegion.h"
+#include "SurfaceCache.h"
+
+#include "prenv.h"
+
+#include "gfx2DGlue.h"
+#include "gfxContext.h"
+#include "gfxPlatform.h"
+
+#include "gfxUtils.h"
+
+#include "MainThreadUtils.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/gfx/Tools.h"
+#include "mozilla/Likely.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "nsMargin.h"
+#include "nsRefreshDriver.h"
+#include "nsThreadUtils.h"
+
+#include <algorithm>  // for min, max
+
+namespace mozilla {
+
+using namespace gfx;
+
+namespace image {
+
+/**
+ * This class is identical to SourceSurfaceSharedData but returns a different
+ * type so that SharedSurfacesChild is aware imagelib wants to recycle this
+ * surface for future animation frames.
+ */
+class RecyclingSourceSurfaceSharedData final : public SourceSurfaceSharedData {
+ public:
+  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(RecyclingSourceSurfaceSharedData,
+                                          override)
+
+  SurfaceType GetType() const override {
+    return SurfaceType::DATA_RECYCLING_SHARED;
+  }
+};
+
+static already_AddRefed<SourceSurfaceSharedData> AllocateBufferForImage(
+    const IntSize& size, SurfaceFormat format, bool aShouldRecycle = false) {
+  // Stride must be a multiple of four or cairo will complain.
+  int32_t stride = (size.width * BytesPerPixel(format) + 0x3) & ~0x3;
+
+  RefPtr<SourceSurfaceSharedData> newSurf;
+  if (aShouldRecycle) {
+    newSurf = new RecyclingSourceSurfaceSharedData();
+  } else {
+    newSurf = new SourceSurfaceSharedData();
+  }
+  if (!newSurf->Init(size, stride, format)) {
+    return nullptr;
+  }
+  return newSurf.forget();
+}
+
+static bool GreenSurface(SourceSurfaceSharedData* aSurface,
+                         const IntSize& aSize, SurfaceFormat aFormat) {
+  int32_t stride = aSurface->Stride();
+  uint32_t* surfaceData = reinterpret_cast<uint32_t*>(aSurface->GetData());
+  uint32_t surfaceDataLength = (stride * aSize.height) / sizeof(uint32_t);
+
+  // Start by assuming that GG is in the second byte and
+  // AA is in the final byte -- the most common case.
+  uint32_t color = mozilla::NativeEndian::swapFromBigEndian(0x00FF00FF);
+
+  // We are only going to handle this type of test under
+  // certain circumstances.
+  MOZ_ASSERT(surfaceData);
+  MOZ_ASSERT(aFormat == SurfaceFormat::B8G8R8A8 ||
+             aFormat == SurfaceFormat::B8G8R8X8 ||
+             aFormat == SurfaceFormat::R8G8B8A8 ||
+             aFormat == SurfaceFormat::R8G8B8X8 ||
+             aFormat == SurfaceFormat::A8R8G8B8 ||
+             aFormat == SurfaceFormat::X8R8G8B8);
+  MOZ_ASSERT((stride * aSize.height) % sizeof(uint32_t));
+
+  if (aFormat == SurfaceFormat::A8R8G8B8 ||
+      aFormat == SurfaceFormat::X8R8G8B8) {
+    color = mozilla::NativeEndian::swapFromBigEndian(0xFF00FF00);
+  }
+
+  for (uint32_t i = 0; i < surfaceDataLength; i++) {
+    surfaceData[i] = color;
+  }
+
+  return true;
+}
+
+static bool ClearSurface(SourceSurfaceSharedData* aSurface,
+                         const IntSize& aSize, SurfaceFormat aFormat) {
+  int32_t stride = aSurface->Stride();
+  uint8_t* data = aSurface->GetData();
+  MOZ_ASSERT(data);
+
+  if (aFormat == SurfaceFormat::OS_RGBX) {
+    // Skia doesn't support RGBX surfaces, so ensure the alpha value is set
+    // to opaque white. While it would be nice to only do this for Skia,
+    // imgFrame can run off main thread and past shutdown where
+    // we might not have gfxPlatform, so just memset every time instead.
+    memset(data, 0xFF, stride * aSize.height);
+  } else if (aSurface->OnHeap()) {
+    // We only need to memset it if the buffer was allocated on the heap.
+    // Otherwise, it's allocated via mmap and refers to a zeroed page and will
+    // be COW once it's written to.
+    memset(data, 0, stride * aSize.height);
+  }
+
+  return true;
+}
+
+imgFrame::imgFrame()
+    : mMonitor("imgFrame"),
+      mDecoded(0, 0, 0, 0),
+      mAborted(false),
+      mFinished(false),
+      mShouldRecycle(false),
+      mTimeout(FrameTimeout::FromRawMilliseconds(100)),
+      mDisposalMethod(DisposalMethod::NOT_SPECIFIED),
+      mBlendMethod(BlendMethod::OVER),
+      mFormat(SurfaceFormat::UNKNOWN),
+      mNonPremult(false) {}
+
+imgFrame::~imgFrame() {
+#ifdef DEBUG
+  MonitorAutoLock lock(mMonitor);
+  MOZ_ASSERT(mAborted || AreAllPixelsWritten());
+  MOZ_ASSERT(mAborted || mFinished);
+#endif
+}
+
+nsresult imgFrame::InitForDecoder(const nsIntSize& aImageSize,
+                                  SurfaceFormat aFormat, bool aNonPremult,
+                                  const Maybe<AnimationParams>& aAnimParams,
+                                  bool aShouldRecycle) {
+  // Assert for properties that should be verified by decoders,
+  // warn for properties related to bad content.
+  if (!SurfaceCache::IsLegalSize(aImageSize)) {
+    NS_WARNING("Should have legal image size");
+    MonitorAutoLock lock(mMonitor);
+    mAborted = true;
+    return NS_ERROR_FAILURE;
+  }
+
+  mImageSize = aImageSize;
+
+  // May be updated shortly after InitForDecoder by BlendAnimationFilter
+  // because it needs to take into consideration the previous frames to
+  // properly calculate. We start with the whole frame as dirty.
+  mDirtyRect = GetRect();
+
+  if (aAnimParams) {
+    mBlendRect = aAnimParams->mBlendRect;
+    mTimeout = aAnimParams->mTimeout;
+    mBlendMethod = aAnimParams->mBlendMethod;
+    mDisposalMethod = aAnimParams->mDisposalMethod;
+  } else {
+    mBlendRect = GetRect();
+  }
+
+  if (aShouldRecycle) {
+    // If we are recycling then we should always use BGRA for the underlying
+    // surface because if we use BGRX, the next frame composited into the
+    // surface could be BGRA and cause rendering problems.
+    MOZ_ASSERT(aAnimParams);
+    mFormat = SurfaceFormat::OS_RGBA;
+  } else {
+    mFormat = aFormat;
+  }
+
+  mNonPremult = aNonPremult;
+
+  MonitorAutoLock lock(mMonitor);
+  mShouldRecycle = aShouldRecycle;
+
+  MOZ_ASSERT(!mRawSurface, "Called imgFrame::InitForDecoder() twice?");
+
+  mRawSurface = AllocateBufferForImage(mImageSize, mFormat, mShouldRecycle);
+  if (!mRawSurface) {
+    mAborted = true;
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (StaticPrefs::browser_measurement_render_anims_and_video_solid() &&
+      aAnimParams) {
+    mBlankRawSurface = AllocateBufferForImage(mImageSize, mFormat);
+    if (!mBlankRawSurface) {
+      mAborted = true;
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+  }
+
+  if (!ClearSurface(mRawSurface, mImageSize, mFormat)) {
+    NS_WARNING("Could not clear allocated buffer");
+    mAborted = true;
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (mBlankRawSurface) {
+    if (!GreenSurface(mBlankRawSurface, mImageSize, mFormat)) {
+      NS_WARNING("Could not clear allocated blank buffer");
+      mAborted = true;
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+  }
+
+  return NS_OK;
+}
+
+nsresult imgFrame::InitForDecoderRecycle(const AnimationParams& aAnimParams) {
+  // We want to recycle this frame, but there is no guarantee that consumers are
+  // done with it in a timely manner. Let's ensure they are done with it first.
+  MonitorAutoLock lock(mMonitor);
+
+  MOZ_ASSERT(mRawSurface);
+
+  if (!mShouldRecycle) {
+    // This frame either was never marked as recyclable, or the flag was cleared
+    // for a caller which does not support recycling.
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  // Ensure we account for all internal references to the surface.
+  MozRefCountType internalRefs = 1;
+  if (mOptSurface == mRawSurface) {
+    ++internalRefs;
+  }
+
+  if (mRawSurface->refCount() > internalRefs) {
+    if (NS_IsMainThread()) {
+      // We should never be both decoding and recycling on the main thread. Sync
+      // decoding can only be used to produce the first set of frames. Those
+      // either never use recycling because advancing was blocked (main thread
+      // is busy) or we were auto-advancing (to seek to a frame) and the frames
+      // were never accessed (and thus cannot have recycle locks).
+      MOZ_ASSERT_UNREACHABLE("Recycling/decoding on the main thread?");
+      return NS_ERROR_NOT_AVAILABLE;
+    }
+
+    // We don't want to wait forever to reclaim the frame because we have no
+    // idea why it is still held. It is possibly due to OMTP. Since we are off
+    // the main thread, and we generally have frames already buffered for the
+    // animation, we can afford to wait a short period of time to hopefully
+    // complete the transaction and reclaim the buffer.
+    //
+    // We choose to wait for, at most, the refresh driver interval, so that we
+    // won't skip more than one frame. If the frame is still in use due to
+    // outstanding transactions, we are already skipping frames. If the frame
+    // is still in use for some other purpose, it won't be returned to the pool
+    // and its owner can hold onto it forever without additional impact here.
+    int32_t refreshInterval =
+        std::max(std::min(nsRefreshDriver::DefaultInterval(), 20), 4);
+    TimeDuration waitInterval =
+        TimeDuration::FromMilliseconds(refreshInterval >> 2);
+    TimeStamp timeout =
+        TimeStamp::Now() + TimeDuration::FromMilliseconds(refreshInterval);
+    while (true) {
+      mMonitor.Wait(waitInterval);
+      if (mRawSurface->refCount() <= internalRefs) {
+        break;
+      }
+
+      if (timeout <= TimeStamp::Now()) {
+        // We couldn't secure the frame for recycling. It will allocate a new
+        // frame instead.
+        return NS_ERROR_NOT_AVAILABLE;
+      }
+    }
+  }
+
+  mBlendRect = aAnimParams.mBlendRect;
+  mTimeout = aAnimParams.mTimeout;
+  mBlendMethod = aAnimParams.mBlendMethod;
+  mDisposalMethod = aAnimParams.mDisposalMethod;
+  mDirtyRect = GetRect();
+
+  return NS_OK;
+}
+
+nsresult imgFrame::InitWithDrawable(gfxDrawable* aDrawable,
+                                    const nsIntSize& aSize,
+                                    const SurfaceFormat aFormat,
+                                    SamplingFilter aSamplingFilter,
+                                    uint32_t aImageFlags,
+                                    gfx::BackendType aBackend) {
+  // Assert for properties that should be verified by decoders,
+  // warn for properties related to bad content.
+  if (!SurfaceCache::IsLegalSize(aSize)) {
+    NS_WARNING("Should have legal image size");
+    MonitorAutoLock lock(mMonitor);
+    mAborted = true;
+    return NS_ERROR_FAILURE;
+  }
+
+  mImageSize = aSize;
+  mFormat = aFormat;
+
+  RefPtr<DrawTarget> target;
+
+  bool canUseDataSurface = Factory::DoesBackendSupportDataDrawtarget(aBackend);
+  if (canUseDataSurface) {
+    MonitorAutoLock lock(mMonitor);
+    // It's safe to use data surfaces for content on this platform, so we can
+    // get away with using volatile buffers.
+    MOZ_ASSERT(!mRawSurface, "Called imgFrame::InitWithDrawable() twice?");
+
+    mRawSurface = AllocateBufferForImage(mImageSize, mFormat);
+    if (!mRawSurface) {
+      mAborted = true;
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+
+    if (!ClearSurface(mRawSurface, mImageSize, mFormat)) {
+      NS_WARNING("Could not clear allocated buffer");
+      mAborted = true;
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+
+    target = gfxPlatform::CreateDrawTargetForData(
+        mRawSurface->GetData(), mImageSize, mRawSurface->Stride(), mFormat);
+  } else {
+    // We can't use data surfaces for content, so we'll create an offscreen
+    // surface instead.  This means if someone later calls RawAccessRef(), we
+    // may have to do an expensive readback, but we warned callers about that in
+    // the documentation for this method.
+#ifdef DEBUG
+    {
+      MonitorAutoLock lock(mMonitor);
+      MOZ_ASSERT(!mOptSurface, "Called imgFrame::InitWithDrawable() twice?");
+    }
+#endif
+
+    if (gfxPlatform::GetPlatform()->SupportsAzureContentForType(aBackend)) {
+      target = gfxPlatform::GetPlatform()->CreateDrawTargetForBackend(
+          aBackend, mImageSize, mFormat);
+    } else {
+      target = gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
+          mImageSize, mFormat);
+    }
+  }
+
+  if (!target || !target->IsValid()) {
+    MonitorAutoLock lock(mMonitor);
+    mAborted = true;
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  // Draw using the drawable the caller provided.
+  RefPtr<gfxContext> ctx = gfxContext::CreateOrNull(target);
+  MOZ_ASSERT(ctx);  // Already checked the draw target above.
+  gfxUtils::DrawPixelSnapped(ctx, aDrawable, SizeDouble(mImageSize),
+                             ImageRegion::Create(ThebesRect(GetRect())),
+                             mFormat, aSamplingFilter, aImageFlags);
+
+  MonitorAutoLock lock(mMonitor);
+  if (canUseDataSurface && !mRawSurface) {
+    NS_WARNING("Failed to create SourceSurfaceSharedData");
+    mAborted = true;
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  if (!canUseDataSurface) {
+    // We used an offscreen surface, which is an "optimized" surface from
+    // imgFrame's perspective.
+    mOptSurface = target->Snapshot();
+  } else {
+    FinalizeSurfaceInternal();
+  }
+
+  // If we reach this point, we should regard ourselves as complete.
+  mDecoded = GetRect();
+  mFinished = true;
+
+  MOZ_ASSERT(AreAllPixelsWritten());
+
+  return NS_OK;
+}
+
+DrawableFrameRef imgFrame::DrawableRef() { return DrawableFrameRef(this); }
+
+RawAccessFrameRef imgFrame::RawAccessRef() { return RawAccessFrameRef(this); }
+
+imgFrame::SurfaceWithFormat imgFrame::SurfaceForDrawing(
+    bool aDoPartialDecode, bool aDoTile, ImageRegion& aRegion,
+    SourceSurface* aSurface) {
+  MOZ_ASSERT(NS_IsMainThread());
+  mMonitor.AssertCurrentThreadOwns();
+
+  if (!aDoPartialDecode) {
+    return SurfaceWithFormat(new gfxSurfaceDrawable(aSurface, mImageSize),
+                             mFormat);
+  }
+
+  gfxRect available =
+      gfxRect(mDecoded.X(), mDecoded.Y(), mDecoded.Width(), mDecoded.Height());
+
+  if (aDoTile) {
+    // Create a temporary surface.
+    // Give this surface an alpha channel because there are
+    // transparent pixels in the padding or undecoded area
+    RefPtr<DrawTarget> target =
+        gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
+            mImageSize, SurfaceFormat::OS_RGBA);
+    if (!target) {
+      return SurfaceWithFormat();
+    }
+
+    SurfacePattern pattern(aSurface, aRegion.GetExtendMode(),
+                           Matrix::Translation(mDecoded.X(), mDecoded.Y()));
+    target->FillRect(ToRect(aRegion.Intersect(available).Rect()), pattern);
+
+    RefPtr<SourceSurface> newsurf = target->Snapshot();
+    return SurfaceWithFormat(new gfxSurfaceDrawable(newsurf, mImageSize),
+                             target->GetFormat());
+  }
+
+  // Not tiling, and we have a surface, so we can account for
+  // a partial decode just by twiddling parameters.
+  aRegion = aRegion.Intersect(available);
+  IntSize availableSize(mDecoded.Width(), mDecoded.Height());
+
+  return SurfaceWithFormat(new gfxSurfaceDrawable(aSurface, availableSize),
+                           mFormat);
+}
+
+bool imgFrame::Draw(gfxContext* aContext, const ImageRegion& aRegion,
+                    SamplingFilter aSamplingFilter, uint32_t aImageFlags,
+                    float aOpacity) {
+  AUTO_PROFILER_LABEL("imgFrame::Draw", GRAPHICS);
+
+  MOZ_ASSERT(NS_IsMainThread());
+  NS_ASSERTION(!aRegion.Rect().IsEmpty(), "Drawing empty region!");
+  NS_ASSERTION(!aRegion.IsRestricted() ||
+                   !aRegion.Rect().Intersect(aRegion.Restriction()).IsEmpty(),
+               "We must be allowed to sample *some* source pixels!");
+
+  // Perform the draw and freeing of the surface outside the lock. We want to
+  // avoid contention with the decoder if we can. The surface may also attempt
+  // to relock the monitor if it is freed (e.g. RecyclingSourceSurface).
+  RefPtr<SourceSurface> surf;
+  SurfaceWithFormat surfaceResult;
+  ImageRegion region(aRegion);
+  gfxRect imageRect(0, 0, mImageSize.width, mImageSize.height);
+
+  {
+    MonitorAutoLock lock(mMonitor);
+
+    bool doPartialDecode = !AreAllPixelsWritten();
+
+    // Most draw targets will just use the surface only during DrawPixelSnapped
+    // but captures/recordings will retain a reference outside this stack
+    // context. While in theory a decoder thread could be trying to recycle this
+    // frame at this very moment, in practice the only way we can get here is if
+    // this frame is the current frame of the animation. Since we can only
+    // advance on the main thread, we know nothing else will try to use it.
+    DrawTarget* drawTarget = aContext->GetDrawTarget();
+    bool recording = drawTarget->GetBackendType() == BackendType::RECORDING;
+    RefPtr<SourceSurface> surf = GetSourceSurfaceInternal();
+    if (!surf) {
+      return false;
+    }
+
+    bool doTile = !imageRect.Contains(aRegion.Rect()) &&
+                  !(aImageFlags & imgIContainer::FLAG_CLAMP);
+
+    surfaceResult = SurfaceForDrawing(doPartialDecode, doTile, region, surf);
+
+    // If we are recording, then we cannot recycle the surface. The blob
+    // rasterizer is not properly synchronized for recycling in the compositor
+    // process. The easiest thing to do is just mark the frames it consumes as
+    // non-recyclable.
+    if (recording && surfaceResult.IsValid()) {
+      mShouldRecycle = false;
+    }
+  }
+
+  if (surfaceResult.IsValid()) {
+    gfxUtils::DrawPixelSnapped(aContext, surfaceResult.mDrawable,
+                               imageRect.Size(), region, surfaceResult.mFormat,
+                               aSamplingFilter, aImageFlags, aOpacity);
+  }
+
+  return true;
+}
+
+nsresult imgFrame::ImageUpdated(const nsIntRect& aUpdateRect) {
+  MonitorAutoLock lock(mMonitor);
+  return ImageUpdatedInternal(aUpdateRect);
+}
+
+nsresult imgFrame::ImageUpdatedInternal(const nsIntRect& aUpdateRect) {
+  mMonitor.AssertCurrentThreadOwns();
+
+  // Clamp to the frame rect to ensure that decoder bugs don't result in a
+  // decoded rect that extends outside the bounds of the frame rect.
+  IntRect updateRect = aUpdateRect.Intersect(GetRect());
+  if (updateRect.IsEmpty()) {
+    return NS_OK;
+  }
+
+  mDecoded.UnionRect(mDecoded, updateRect);
+
+  // Update our invalidation counters for any consumers watching for changes
+  // in the surface.
+  if (mRawSurface) {
+    mRawSurface->Invalidate(updateRect);
+  }
+  return NS_OK;
+}
+
+void imgFrame::Finish(Opacity aFrameOpacity /* = Opacity::SOME_TRANSPARENCY */,
+                      bool aFinalize /* = true */,
+                      bool aOrientationSwapsWidthAndHeight /* = false */) {
+  MonitorAutoLock lock(mMonitor);
+
+  IntRect frameRect(GetRect());
+  if (!mDecoded.IsEqualEdges(frameRect)) {
+    // The decoder should have produced rows starting from either the bottom or
+    // the top of the image. We need to calculate the region for which we have
+    // not yet invalidated. And if the orientation swaps width and height then
+    // its from the left or right.
+    IntRect delta(0, 0, frameRect.width, 0);
+    if (!aOrientationSwapsWidthAndHeight) {
+      delta.width = frameRect.width;
+      if (mDecoded.y == 0) {
+        delta.y = mDecoded.height;
+        delta.height = frameRect.height - mDecoded.height;
+      } else if (mDecoded.y + mDecoded.height == frameRect.height) {
+        delta.height = frameRect.height - mDecoded.y;
+      } else {
+        MOZ_ASSERT_UNREACHABLE("Decoder only updated middle of image!");
+        delta = frameRect;
+      }
+    } else {
+      delta.height = frameRect.height;
+      if (mDecoded.x == 0) {
+        delta.x = mDecoded.width;
+        delta.width = frameRect.width - mDecoded.width;
+      } else if (mDecoded.x + mDecoded.width == frameRect.width) {
+        delta.width = frameRect.width - mDecoded.x;
+      } else {
+        MOZ_ASSERT_UNREACHABLE("Decoder only updated middle of image!");
+        delta = frameRect;
+      }
+    }
+
+    ImageUpdatedInternal(delta);
+  }
+
+  MOZ_ASSERT(mDecoded.IsEqualEdges(frameRect));
+
+  if (aFinalize) {
+    FinalizeSurfaceInternal();
+  }
+
+  mFinished = true;
+
+  // The image is now complete, wake up anyone who's waiting.
+  mMonitor.NotifyAll();
+}
+
+uint32_t imgFrame::GetImageBytesPerRow() const {
+  mMonitor.AssertCurrentThreadOwns();
+
+  if (mRawSurface) {
+    return mImageSize.width * BytesPerPixel(mFormat);
+  }
+
+  return 0;
+}
+
+uint32_t imgFrame::GetImageDataLength() const {
+  return GetImageBytesPerRow() * mImageSize.height;
+}
+
+void imgFrame::GetImageData(uint8_t** aData, uint32_t* aLength) const {
+  MonitorAutoLock lock(mMonitor);
+  GetImageDataInternal(aData, aLength);
+}
+
+void imgFrame::GetImageDataInternal(uint8_t** aData, uint32_t* aLength) const {
+  mMonitor.AssertCurrentThreadOwns();
+  MOZ_ASSERT(mRawSurface);
+
+  if (mRawSurface) {
+    // TODO: This is okay for now because we only realloc shared surfaces on
+    // the main thread after decoding has finished, but if animations want to
+    // read frame data off the main thread, we will need to reconsider this.
+    *aData = mRawSurface->GetData();
+    MOZ_ASSERT(*aData,
+               "mRawSurface is non-null, but GetData is null in GetImageData");
+  } else {
+    *aData = nullptr;
+  }
+
+  *aLength = GetImageDataLength();
+}
+
+uint8_t* imgFrame::GetImageData() const {
+  uint8_t* data;
+  uint32_t length;
+  GetImageData(&data, &length);
+  return data;
+}
+
+void imgFrame::FinalizeSurface() {
+  MonitorAutoLock lock(mMonitor);
+  FinalizeSurfaceInternal();
+}
+
+void imgFrame::FinalizeSurfaceInternal() {
+  mMonitor.AssertCurrentThreadOwns();
+
+  // Not all images will have mRawSurface to finalize (i.e. paletted images).
+  if (mShouldRecycle || !mRawSurface ||
+      mRawSurface->GetType() != SurfaceType::DATA_SHARED) {
+    return;
+  }
+
+  auto* sharedSurf = static_cast<SourceSurfaceSharedData*>(mRawSurface.get());
+  sharedSurf->Finalize();
+}
+
+already_AddRefed<SourceSurface> imgFrame::GetSourceSurface() {
+  MonitorAutoLock lock(mMonitor);
+  return GetSourceSurfaceInternal();
+}
+
+already_AddRefed<SourceSurface> imgFrame::GetSourceSurfaceInternal() {
+  mMonitor.AssertCurrentThreadOwns();
+
+  if (mOptSurface) {
+    if (mOptSurface->IsValid()) {
+      RefPtr<SourceSurface> surf(mOptSurface);
+      return surf.forget();
+    }
+    mOptSurface = nullptr;
+  }
+
+  if (mBlankRawSurface) {
+    // We are going to return the blank surface because of the flags.
+    // We are including comments here that are copied from below
+    // just so that we are on the same page!
+    RefPtr<SourceSurface> surf(mBlankRawSurface);
+    return surf.forget();
+  }
+
+  RefPtr<SourceSurface> surf(mRawSurface);
+  return surf.forget();
+}
+
+void imgFrame::Abort() {
+  MonitorAutoLock lock(mMonitor);
+
+  mAborted = true;
+
+  // Wake up anyone who's waiting.
+  mMonitor.NotifyAll();
+}
+
+bool imgFrame::IsAborted() const {
+  MonitorAutoLock lock(mMonitor);
+  return mAborted;
+}
+
+bool imgFrame::IsFinished() const {
+  MonitorAutoLock lock(mMonitor);
+  return mFinished;
+}
+
+void imgFrame::WaitUntilFinished() const {
+  MonitorAutoLock lock(mMonitor);
+
+  while (true) {
+    // Return if we're aborted or complete.
+    if (mAborted || mFinished) {
+      return;
+    }
+
+    // Not complete yet, so we'll have to wait.
+    mMonitor.Wait();
+  }
+}
+
+bool imgFrame::AreAllPixelsWritten() const {
+  mMonitor.AssertCurrentThreadOwns();
+  return mDecoded.IsEqualInterior(GetRect());
+}
+
+void imgFrame::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
+                                      const AddSizeOfCb& aCallback) const {
+  MonitorAutoLock lock(mMonitor);
+
+  AddSizeOfCbData metadata;
+  metadata.mFinished = mFinished;
+
+  if (mOptSurface) {
+    metadata.mHeapBytes += aMallocSizeOf(mOptSurface);
+
+    SourceSurface::SizeOfInfo info;
+    mOptSurface->SizeOfExcludingThis(aMallocSizeOf, info);
+    metadata.Accumulate(info);
+  }
+  if (mRawSurface) {
+    metadata.mHeapBytes += aMallocSizeOf(mRawSurface);
+
+    SourceSurface::SizeOfInfo info;
+    mRawSurface->SizeOfExcludingThis(aMallocSizeOf, info);
+    metadata.Accumulate(info);
+  }
+
+  aCallback(metadata);
+}
+
+}  // namespace image
+}  // namespace mozilla