float AnimationSegment::overlap( const AnimationSegment& seg ) const
{
if( mAnim != seg.getAnimation() )
return 0;
AnimationSegment seg1 = *this,
seg2 = seg;
if( seg2.mStartTime < seg1.mStartTime )
std::swap( seg1, seg2 );
float l_int = 0; // length of the intersection
if( seg2.mStartTime < seg1.mEndTime )
{
if( seg2.mEndTime <= seg1.mEndTime )
l_int = seg2.mEndTime - seg2.mStartTime;
else
l_int = seg1.mEndTime - seg2.mStartTime;
}
float l_seg = std::min<float>( seg1.mEndTime - seg1.mStartTime,
seg2.mEndTime - seg2.mStartTime ); // length of the shorter segment
return l_int/l_seg;
}
AnimationSegment AnimationSegment::merge( const AnimationSegment& seg ) const
{
if( mAnim != seg.getAnimation() )
return AnimationSegment( mAnim, 0, 0 );
AnimationSegment seg1 = *this,
seg2 = seg;
if( seg2.mStartTime < seg1.mStartTime )
std::swap( seg1, seg2 );
if( seg2.mStartTime < seg1.mEndTime )
{
if( seg2.mEndTime <= seg1.mEndTime )
return seg1;
else
return AnimationSegment( mAnim, seg1.mStartTime, seg2.mEndTime );
}
return AnimationSegment( mAnim, 0, 0 );
}
static bool
SampleAnimations(Layer* aLayer, TimeStamp aPoint)
{
AnimationArray& animations = aLayer->GetAnimations();
InfallibleTArray<AnimData>& animationData = aLayer->GetAnimationData();
bool activeAnimations = false;
for (uint32_t i = animations.Length(); i-- !=0; ) {
Animation& animation = animations[i];
AnimData& animData = animationData[i];
double numIterations = animation.numIterations() != -1 ?
animation.numIterations() : NS_IEEEPositiveInfinity();
double positionInIteration =
ElementAnimations::GetPositionInIteration(aPoint - animation.startTime(),
animation.duration(),
numIterations,
animation.direction());
NS_ABORT_IF_FALSE(0.0 <= positionInIteration &&
positionInIteration <= 1.0,
"position should be in [0-1]");
int segmentIndex = 0;
AnimationSegment* segment = animation.segments().Elements();
while (segment->endPortion() < positionInIteration) {
++segment;
++segmentIndex;
}
double positionInSegment = (positionInIteration - segment->startPortion()) /
(segment->endPortion() - segment->startPortion());
double portion = animData.mFunctions[segmentIndex]->GetValue(positionInSegment);
activeAnimations = true;
// interpolate the property
Animatable interpolatedValue;
SampleValue(portion, animation, animData.mStartValues[segmentIndex],
animData.mEndValues[segmentIndex], &interpolatedValue);
LayerComposite* layerComposite = aLayer->AsLayerComposite();
switch (animation.property()) {
case eCSSProperty_opacity:
{
layerComposite->SetShadowOpacity(interpolatedValue.get_float());
break;
}
case eCSSProperty_transform:
{
gfx3DMatrix matrix = interpolatedValue.get_ArrayOfTransformFunction()[0].get_TransformMatrix().value();
if (ContainerLayer* c = aLayer->AsContainerLayer()) {
matrix.ScalePost(c->GetInheritedXScale(),
c->GetInheritedYScale(),
1);
}
layerComposite->SetShadowTransform(matrix);
layerComposite->SetShadowTransformSetByAnimation(true);
break;
}
default:
NS_WARNING("Unhandled animated property");
}
}
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
activeAnimations |= SampleAnimations(child, aPoint);
}
return activeAnimations;
}
static bool
SampleAnimations(Layer* aLayer, TimeStamp aPoint)
{
AnimationArray& animations = aLayer->GetAnimations();
InfallibleTArray<AnimData>& animationData = aLayer->GetAnimationData();
bool activeAnimations = false;
for (uint32_t i = animations.Length(); i-- !=0; ) {
Animation& animation = animations[i];
AnimData& animData = animationData[i];
activeAnimations = true;
TimeDuration elapsedDuration = aPoint - animation.startTime();
// Skip animations that are yet to start.
//
// Currently, this should only happen when the refresh driver is under test
// control and is made to produce a time in the past or is restored from
// test control causing it to jump backwards in time.
//
// Since activeAnimations is true, this could mean we keep compositing
// unnecessarily during the delay, but so long as this only happens while
// the refresh driver is under test control that should be ok.
if (elapsedDuration.ToSeconds() < 0) {
continue;
}
AnimationTiming timing;
timing.mIterationDuration = animation.duration();
// Currently animations run on the compositor have their delay factored
// into their start time, hence the delay is effectively zero.
timing.mDelay = TimeDuration(0);
timing.mIterationCount = animation.iterationCount();
timing.mDirection = animation.direction();
// Animations typically only run on the compositor during their active
// interval but if we end up sampling them outside that range (for
// example, while they are waiting to be removed) we currently just
// assume that we should fill.
timing.mFillMode = NS_STYLE_ANIMATION_FILL_MODE_BOTH;
ComputedTiming computedTiming =
dom::Animation::GetComputedTimingAt(
Nullable<TimeDuration>(elapsedDuration), timing);
NS_ABORT_IF_FALSE(0.0 <= computedTiming.mTimeFraction &&
computedTiming.mTimeFraction <= 1.0,
"time fraction should be in [0-1]");
int segmentIndex = 0;
AnimationSegment* segment = animation.segments().Elements();
while (segment->endPortion() < computedTiming.mTimeFraction) {
++segment;
++segmentIndex;
}
double positionInSegment =
(computedTiming.mTimeFraction - segment->startPortion()) /
(segment->endPortion() - segment->startPortion());
double portion =
animData.mFunctions[segmentIndex]->GetValue(positionInSegment);
// interpolate the property
Animatable interpolatedValue;
SampleValue(portion, animation, animData.mStartValues[segmentIndex],
animData.mEndValues[segmentIndex], &interpolatedValue);
LayerComposite* layerComposite = aLayer->AsLayerComposite();
switch (animation.property()) {
case eCSSProperty_opacity:
{
layerComposite->SetShadowOpacity(interpolatedValue.get_float());
break;
}
case eCSSProperty_transform:
{
Matrix4x4 matrix = interpolatedValue.get_ArrayOfTransformFunction()[0].get_TransformMatrix().value();
if (ContainerLayer* c = aLayer->AsContainerLayer()) {
matrix = matrix * Matrix4x4().Scale(c->GetInheritedXScale(),
c->GetInheritedYScale(),
1);
}
layerComposite->SetShadowTransform(matrix);
layerComposite->SetShadowTransformSetByAnimation(true);
break;
}
default:
NS_WARNING("Unhandled animated property");
}
}
for (Layer* child = aLayer->GetFirstChild(); child;
child = child->GetNextSibling()) {
activeAnimations |= SampleAnimations(child, aPoint);
}
return activeAnimations;
}