Issue #2073 - m-c 1454149: Do not advance animated images which are not displayed

This commit is contained in:
Martok 2023-01-01 01:18:27 +01:00 committed by roytam1
commit 845411a7ad
4 changed files with 50 additions and 0 deletions

View file

@ -151,6 +151,21 @@ AnimationState::SetAnimationFrameTime(const TimeStamp& aTime)
mCurrentAnimationFrameTime = aTime;
}
bool
AnimationState::MaybeAdvanceAnimationFrameTime(const TimeStamp& aTime)
{
if (!gfxPrefs::ImageAnimatedResumeFromLastDisplayed() ||
mCurrentAnimationFrameTime >= aTime) {
return false;
}
// We are configured to stop an animation when it is out of view, and restart
// it from the same point when it comes back into view. The same applies if it
// was discarded while out of view.
mCurrentAnimationFrameTime = aTime;
return true;
}
uint32_t
AnimationState::GetCurrentAnimationFrameIndex() const
{
@ -312,6 +327,7 @@ FrameAnimator::AdvanceFrame(AnimationState& aState,
MOZ_ASSERT(currentFrameEndTime.isSome());
aState.mCurrentAnimationFrameTime = *currentFrameEndTime;
aState.mCurrentAnimationFrameIndex = nextFrameIndex;
aState.mCompositedFrameRequested = false;
aFrames.Advance(nextFrameIndex);
return ret;
@ -343,6 +359,7 @@ FrameAnimator::AdvanceFrame(AnimationState& aState,
// Set currentAnimationFrameIndex at the last possible moment
aState.mCurrentAnimationFrameIndex = nextFrameIndex;
aState.mCompositedFrameRequested = false;
aFrames.Advance(nextFrameIndex);
// If we're here, we successfully advanced the frame.
@ -379,6 +396,7 @@ FrameAnimator::RequestRefresh(AnimationState& aState,
RefreshResult ret;
if (aState.IsDiscarded()) {
aState.MaybeAdvanceAnimationFrameTime(aTime);
return ret;
}
@ -394,6 +412,10 @@ FrameAnimator::RequestRefresh(AnimationState& aState,
aState.UpdateStateInternal(result, aAnimationFinished);
if (aState.IsDiscarded() || !result) {
aState.MaybeAdvanceAnimationFrameTime(aTime);
if (!ret.mDirtyRect.IsEmpty()) {
ret.mFrameAdvanced = true;
}
return ret;
}
@ -407,6 +429,15 @@ FrameAnimator::RequestRefresh(AnimationState& aState,
MOZ_ASSERT(aState.mCompositedFrameInvalid);
// Nothing we can do but wait for our previous current frame to be decoded
// again so we can determine what to do next.
aState.MaybeAdvanceAnimationFrameTime(aTime);
return ret;
}
// If nothing has accessed the composited frame since the last time we
// advanced, then there is no point in continuing to advance the animation.
// This has the effect of freezing the animation while not in view.
if (!aState.mCompositedFrameRequested &&
aState.MaybeAdvanceAnimationFrameTime(aTime)) {
return ret;
}
@ -443,6 +474,8 @@ FrameAnimator::RequestRefresh(AnimationState& aState,
LookupResult
FrameAnimator::GetCompositedFrame(AnimationState& aState)
{
aState.mCompositedFrameRequested = true;
if (aState.mCompositedFrameInvalid) {
MOZ_ASSERT(gfxPrefs::ImageMemAnimatedDiscardable());
MOZ_ASSERT(aState.GetHasBeenDecoded());