// Go down the composite layer tree, setting properties to match their
// content-side counterparts.
static void
SetShadowProperties(Layer* aLayer)
{
// FIXME: Bug 717688 -- Do these updates in LayerTransactionParent::RecvUpdate.
LayerComposite* layerComposite = aLayer->AsLayerComposite();
// Set the layerComposite's base transform to the layer's base transform.
layerComposite->SetShadowTransform(aLayer->GetBaseTransform());
layerComposite->SetShadowTransformSetByAnimation(false);
layerComposite->SetShadowVisibleRegion(aLayer->GetVisibleRegion());
layerComposite->SetShadowClipRect(aLayer->GetClipRect());
layerComposite->SetShadowOpacity(aLayer->GetOpacity());
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
SetShadowProperties(child);
}
}
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;
}
// Go down shadow layer tree and apply transformations for scrollable layers.
static void
TransformShadowTree(nsDisplayListBuilder* aBuilder, nsFrameLoader* aFrameLoader,
nsIFrame* aFrame, Layer* aLayer,
const ViewTransform& aTransform,
float aTempScaleDiffX = 1.0,
float aTempScaleDiffY = 1.0)
{
LayerComposite* shadow = aLayer->AsLayerComposite();
shadow->SetShadowClipRect(aLayer->GetClipRect());
shadow->SetShadowVisibleRegion(aLayer->GetVisibleRegion());
shadow->SetShadowOpacity(aLayer->GetOpacity());
const FrameMetrics* metrics = GetFrameMetrics(aLayer);
gfx3DMatrix shadowTransform = aLayer->GetTransform();
ViewTransform layerTransform = aTransform;
if (metrics && metrics->IsScrollable()) {
const ViewID scrollId = metrics->mScrollId;
const nsContentView* view =
aFrameLoader->GetCurrentRemoteFrame()->GetContentView(scrollId);
NS_ABORT_IF_FALSE(view, "Array of views should be consistent with layer tree");
const gfx3DMatrix& currentTransform = aLayer->GetTransform();
const ViewConfig& config = view->GetViewConfig();
// With temporary scale we should compensate translation
// using temporary scale value
aTempScaleDiffX *= GetXScale(shadowTransform) * config.mXScale;
aTempScaleDiffY *= GetYScale(shadowTransform) * config.mYScale;
ViewTransform viewTransform = ComputeShadowTreeTransform(
aFrame, aFrameLoader, metrics, view->GetViewConfig(),
aTempScaleDiffX, aTempScaleDiffY
);
// Apply the layer's own transform *before* the view transform
shadowTransform = gfx3DMatrix(viewTransform) * currentTransform;
layerTransform = viewTransform;
if (metrics->IsRootScrollable()) {
// Apply the translation *before* we do the rest of the transforms.
nsIntPoint offset = GetContentRectLayerOffset(aFrame, aBuilder);
shadowTransform = shadowTransform *
gfx3DMatrix::Translation(float(offset.x), float(offset.y), 0.0);
}
}
if (aLayer->GetIsFixedPosition() &&
!aLayer->GetParent()->GetIsFixedPosition()) {
// Alter the shadow transform of fixed position layers in the situation
// that the view transform's scroll position doesn't match the actual
// scroll position, due to asynchronous layer scrolling.
float offsetX = layerTransform.mTranslation.x;
float offsetY = layerTransform.mTranslation.y;
ReverseTranslate(shadowTransform, gfxPoint(offsetX, offsetY));
const nsIntRect* clipRect = shadow->GetShadowClipRect();
if (clipRect) {
nsIntRect transformedClipRect(*clipRect);
transformedClipRect.MoveBy(-offsetX, -offsetY);
shadow->SetShadowClipRect(&transformedClipRect);
}
}
// The transform already takes the resolution scale into account. Since we
// will apply the resolution scale again when computing the effective
// transform, we must apply the inverse resolution scale here.
if (ContainerLayer* c = aLayer->AsContainerLayer()) {
shadowTransform.Scale(1.0f/c->GetPreXScale(),
1.0f/c->GetPreYScale(),
1);
}
shadowTransform.ScalePost(1.0f/aLayer->GetPostXScale(),
1.0f/aLayer->GetPostYScale(),
1);
shadow->SetShadowTransform(shadowTransform);
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
TransformShadowTree(aBuilder, aFrameLoader, aFrame, child, layerTransform,
aTempScaleDiffX, aTempScaleDiffY);
}
}
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;
}