This was done automatically replacing:
s/mozilla::Move/std::move/
s/ Move(/ std::move(/
s/(Move(/(std::move(/
Removing the 'using mozilla::Move;' lines.
And then with a few manual fixups, see the bug for the split series..
MozReview-Commit-ID: Jxze3adipUh
In FrameAnimator::GetCompositedFrame, we call SurfaceCache::Lookup even
when we use the composited frame directly and leave the lookup result
unused. The only value in performing the lookup could be to mark the
surface as used to avoid expiring it too soon, but
FrameAnimator::RequestRefresh should already be doing enough to keep it
alive, if the image isn't locked in the first place.
In FrameAnimator::RequestRefresh and AdvanceFrame, we currently create
several RawAccessFrameRef objects to the same frames, either to get
timeouts or perform the blending. With some tweaking, we can avoid
requesting the same frame more than once. This will avoid mutex locks on
the surface provider and the frame itself.
DrawableSurface only exposes DrawableFrameRef to its users. This is
sufficient for the drawing related code in general, but FrameAnimator
really needs RawAccessFrameRef to the underlying pixel data (which may
be paletted). While one can get a RawAccessFrameRef from a
DrawableFrameRef, it requires yet another lock of the imgFrame's mutex.
We can avoid this extra lock if we just allow the callers to get the
right data type in the first place.
All animated images on a page are currently registered with the refresh
driver and advance with the tick refresh. These animations may not even
be in view, and if they are large and thus cause redecoding, cause a
marked increase in CPU usage for no benefit to the user.
This patch adds an additional flag, mCompositedFrameRequested, to the
AnimationState used by FrameAnimator. It is set to true each time the
current animated image frame is requested via
FrameAnimator::GetCompositedFrame. It is set to false each time the
frame is advanced in FrameAnimator::AdvanceFrame (via
FrameAnimator::RequestRefresh). If it is true when
FrameAnimator::RequestRefresh is called, then it will advance the
animation according to the normal rules. If it is false, then it will
set the current animation time to the current time instead of advancing.
This should not cause the animation to fall behind anymore or skip
frames more than it does today. This is because if
FrameAnimator::GetCompositedFrame is not called, then the internal state
of the animation is advancing ahead of what the user sees. Once it is
called, the new frame is far ahead of the previously displayed frame.
The only difference now is that we will display the previous frame for
slightly longer until the next refresh tick.
Note that if an animated image is layerized (should not happen today) or
otherwise uses an ImageContainer, this optimization fails. While we know
whether or not we have an image container, we do not know if anything is
actively using it.
Note that AnimationSurfaceProvider will override these methods to give a
proper implementation in a later patch in this series. For now, they are
mostly stubbed, using the default implementation from ISurfaceProvider.
They focus on the main operations we perform on an animation:
1) Progressing through the animation, e.g. advancing a frame. If we
don't decode the whole animation up front, we need to know at the
decoder level where we are in the display of the animation.
2) Restarting an animation from the beginning. This is a specialized
case of the above, where we want to skip explicitly advancing through
the remaining frames and instead restart at the beginning. The decoder
may have already discarded the earliest frames and must start redecoding
them.
3) Knowing whether or not the decoder is still active, e.g. can we be
missing frames.
The shared memory handle reporting has been generalized to be an
external handle reporting. This is used for both shared memory, and for
volatile memory (on Android.) This will allow us to have a better sense
of just how many handles are being used by images on Android.
Additionally we were not properly reporting forced heap allocated
memory, if we were putting animated frames on the heap. This is because
we used SourceSurfaceAlignedRawData without implementing
AddSizeOfExcludingThis.
When an animated image has been discarded, we avoided marking the
composited frame invalid unless it had been previously decoded. Most of
the time this was fine, but if the animated image was still decoding for
the first time, then we still had a composited frame lingering that we
did not mark as invalid. As a result, when we called
RasterImage::LookupFrame (and indirectly
FrameAnimator::GetCompositedFrame), it would always return the
composited frame. This meant that RasterImage::Decode would never be
called to trigger a redecode. At the same time,
FrameAnimator::RequestRefresh would not cause us to advance the frame
because the state was still discarded.
With this patch we separate out the concepts of "has ever requested to
be decoded" and "has ever completed decoding." The former is now used to
control whether or not a composited frame is marked as invalid after we
discover we currently have no surface for the animation -- this solves
the animation remaining frozen as we now request the redecode as
expected. The latter remains used to determine if we actually know the
total number of frames.
This patch makes the following changes to the macros.
- Removes PROFILER_LABEL_FUNC. It's only suitable for use in functions outside
classes, due to PROFILER_FUNCTION_NAME not getting class names, and it was
mostly misused.
- Removes PROFILER_FUNCTION_NAME. It's no longer used, and __func__ is
universally available now anyway.
- Combines the first two string literal arguments of PROFILER_LABEL and
PROFILER_LABEL_DYNAMIC into a single argument. There was no good reason for
them to be separate, and it forced a '::' in the label, which isn't always
appropriate. Also, the meaning of the "name_space" argument was interpreted
in an interesting variety of ways.
- Adds an "AUTO_" prefix to PROFILER_LABEL and PROFILER_LABEL_DYNAMIC, to make
it clearer they construct RAII objects rather than just being function calls.
(I myself have screwed up the scoping because of this in the past.)
- Fills in the 'js::ProfileEntry::Category::' qualifier within the macro, so
the caller doesn't need to. This makes a *lot* more of the uses fit onto a
single line.
The patch also makes the following changes to the macro uses (beyond those
required by the changes described above).
- Fixes a bunch of labels that had gotten out of sync with the name of the
class and/or function that encloses them.
- Removes a useless PROFILER_LABEL use within a trivial scope in
EventStateManager::DispatchMouseOrPointerEvent(). It clearly wasn't serving
any useful purpose. It also serves as extra evidence that the AUTO_ prefix is
a good idea.
- Tweaks DecodePool::SyncRunIf{Preferred,Possible} so that the labelling is
done within them, instead of at their callsites, because that's a more
standard way of doing things.
We invalidate if FrameAnimator::UpdateState marks the composited frame as valid, but we fail to do so if FrameAnimator::RequestRefresh does so.
The other place that sets the composited frame as valid is RasterImage::Decode. This call is actually redundant because the UpdateState call will do the same.
Even though we will invalidate when the decode produces results we could still draw incorrectly if something else invalidates. In which case we would only draw the part of the image that was invalidated. But that should actually be impossible as explained in the comment.
We invalidate if FrameAnimator::UpdateState marks the composited frame as valid, but we fail to do so if FrameAnimator::RequestRefresh does so.
The other place that sets the composited frame as valid is RasterImage::Decode. This call is actually redundant because the UpdateState call will do the same.
Even though we will invalidate when the decode produces results we could still draw incorrectly if something else invalidates. In which case we would only draw the part of the image that was invalidated. But that should actually be impossible as explained in the comment.
We draw nothing when the composited frame is invalid, so when we mark it valid we should invalidate. Usually the action that causes the composited frame to be valid will invalidate (ie RequestRefresh).
If the SurfaceCache discards our frames on another thread, the runnable that notifies us of that discard could race with a decode complete notification. So we can't rely on any ordering of SetDiscarded and NotifyDecodeComplete. Thus we must derive our state purely from the SurfaceCache (and mAnimationFinished from RasterImage).
We also update the image state in RequestRefresh (the main place where we use the state that is updated).
The other main place we use the state is GetCompositedFrame, but we don't update the state there. It should be fine because the only time this might lag behind reality is if the frames are discarded, and it should be fine to continue drawing the composited frame until the discard notification arrives.
The way that we tell that an animated image has all of its frames complete in the surface cache is less than ideal.
The SurfaceCache can discard on any thread at any time. So we could be in the middle of advancing frames of a fully decoded animated image and then the frames could disappear out from under us.
Making the code deal with that kind of a situation would make the logic very complicated. So instead just look up the frames once and pass them around, that way they never change during while we are advancing the frame.
Do this to allow GetTimeoutForFrame to be called for frames that haven't been decoded yet. Propagate a Maybe result where it makes sense. The remaining callers just bail if they get no return value. Many of them can just assert that they get a return value because they already got the same frame, so the timeout has to be available.
The logic is a little tricky because we have "Forever" timeouts that were sort of treated as error cases.
For animated images with finite animations we can finish running their animation. At which point we won't call RequestRefresh, and so we will never mark the composited frame as valid (since that is the only place we do that).
To fix this we mark the composited frame as valid when we finish decoding.
But we can do better than that, we can mark the composited frame as valid immediately when we create a new decoded since we are just drawing the final frame from now on.
When we allow animated images to be discarded we still want to track if the image has been fully decoded before, but it would be confusing to say that it is "done decoding" because that sounds like the image is currently decoded, even though it could be discarded at the time.
FrameAnimator::GetCompositedFrame is only ever called with the current animation frame index. This is good because it can return invalid results if it is called for some other frame number.
