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gecko-dev/gfx/layers/composite/AsyncCompositionManager.cpp
Kevin Wern 368ce48f75 Bug 1173521 - Properly handle unapplying 3D projective transforms to rectangles in APZ code. r=botond 
The untransformation is done using the newly added UntransformTo() functions
which call Matrix4x4::ProjectRectBounds(), which returns an empty rectangle
if the result is not at least partially on the positive side of the w = 0 plane.

UntransformTo() returnis the transformed rectangle if it's not empty, and
Nothing() otherwise, making callers check for this case.

The patch also adds some assertions to places where we apply transforms we
know should be 2D (and thus didn't switch to use UntransformTo()), checking
that the transforms are in fact 2D.

--HG--
extra : rebase_source : bbc226f4135c2cf229c4e00dfb017a6c9c078391
extra : source : c2732f62a3b9a5246801aa000ce572ee07f53481
2015-08-28 12:00:29 -04:00

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51 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=2 et 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 "mozilla/layers/AsyncCompositionManager.h"
#include <stdint.h> // for uint32_t
#include "apz/src/AsyncPanZoomController.h"
#include "FrameMetrics.h" // for FrameMetrics
#include "LayerManagerComposite.h" // for LayerManagerComposite, etc
#include "Layers.h" // for Layer, ContainerLayer, etc
#include "gfxPoint.h" // for gfxPoint, gfxSize
#include "gfxPrefs.h" // for gfxPrefs
#include "mozilla/StyleAnimationValue.h" // for StyleAnimationValue, etc
#include "mozilla/WidgetUtils.h" // for ComputeTransformForRotation
#include "mozilla/dom/KeyframeEffect.h" // for KeyframeEffectReadOnly
#include "mozilla/gfx/BaseRect.h" // for BaseRect
#include "mozilla/gfx/Point.h" // for RoundedToInt, PointTyped
#include "mozilla/gfx/Rect.h" // for RoundedToInt, RectTyped
#include "mozilla/gfx/ScaleFactor.h" // for ScaleFactor
#include "mozilla/layers/Compositor.h" // for Compositor
#include "mozilla/layers/CompositorParent.h" // for CompositorParent, etc
#include "mozilla/layers/LayerMetricsWrapper.h" // for LayerMetricsWrapper
#include "nsCoord.h" // for NSAppUnitsToFloatPixels, etc
#include "nsDebug.h" // for NS_ASSERTION, etc
#include "nsDeviceContext.h" // for nsDeviceContext
#include "nsDisplayList.h" // for nsDisplayTransform, etc
#include "nsMathUtils.h" // for NS_round
#include "nsPoint.h" // for nsPoint
#include "nsRect.h" // for mozilla::gfx::IntRect
#include "nsRegion.h" // for nsIntRegion
#include "nsTArray.h" // for nsTArray, nsTArray_Impl, etc
#include "nsTArrayForwardDeclare.h" // for InfallibleTArray
#include "UnitTransforms.h" // for TransformTo
#include "gfxPrefs.h"
#if defined(MOZ_WIDGET_ANDROID)
# include <android/log.h>
# include "AndroidBridge.h"
#endif
#include "GeckoProfiler.h"
#include "FrameUniformityData.h"
struct nsCSSValueSharedList;
namespace mozilla {
namespace layers {
using namespace mozilla::gfx;
enum Op { Resolve, Detach };
static bool
IsSameDimension(dom::ScreenOrientationInternal o1, dom::ScreenOrientationInternal o2)
{
bool isO1portrait = (o1 == dom::eScreenOrientation_PortraitPrimary || o1 == dom::eScreenOrientation_PortraitSecondary);
bool isO2portrait = (o2 == dom::eScreenOrientation_PortraitPrimary || o2 == dom::eScreenOrientation_PortraitSecondary);
return !(isO1portrait ^ isO2portrait);
}
static bool
ContentMightReflowOnOrientationChange(const IntRect& rect)
{
return rect.width != rect.height;
}
template<Op OP>
static void
WalkTheTree(Layer* aLayer,
bool& aReady,
const TargetConfig& aTargetConfig)
{
if (RefLayer* ref = aLayer->AsRefLayer()) {
if (const CompositorParent::LayerTreeState* state = CompositorParent::GetIndirectShadowTree(ref->GetReferentId())) {
if (Layer* referent = state->mRoot) {
if (!ref->GetVisibleRegion().IsEmpty()) {
dom::ScreenOrientationInternal chromeOrientation = aTargetConfig.orientation();
dom::ScreenOrientationInternal contentOrientation = state->mTargetConfig.orientation();
if (!IsSameDimension(chromeOrientation, contentOrientation) &&
ContentMightReflowOnOrientationChange(aTargetConfig.naturalBounds())) {
aReady = false;
}
}
if (OP == Resolve) {
ref->ConnectReferentLayer(referent);
} else {
ref->DetachReferentLayer(referent);
WalkTheTree<OP>(referent, aReady, aTargetConfig);
}
}
}
}
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
WalkTheTree<OP>(child, aReady, aTargetConfig);
}
}
AsyncCompositionManager::AsyncCompositionManager(LayerManagerComposite* aManager)
: mLayerManager(aManager)
, mIsFirstPaint(true)
, mLayersUpdated(false)
, mPaintSyncId(0)
, mReadyForCompose(true)
{
}
AsyncCompositionManager::~AsyncCompositionManager()
{
}
void
AsyncCompositionManager::ResolveRefLayers()
{
if (!mLayerManager->GetRoot()) {
return;
}
mReadyForCompose = true;
WalkTheTree<Resolve>(mLayerManager->GetRoot(),
mReadyForCompose,
mTargetConfig);
}
void
AsyncCompositionManager::DetachRefLayers()
{
if (!mLayerManager->GetRoot()) {
return;
}
WalkTheTree<Detach>(mLayerManager->GetRoot(),
mReadyForCompose,
mTargetConfig);
}
void
AsyncCompositionManager::ComputeRotation()
{
if (!mTargetConfig.naturalBounds().IsEmpty()) {
mWorldTransform =
ComputeTransformForRotation(mTargetConfig.naturalBounds(),
mTargetConfig.rotation());
}
}
static void
GetBaseTransform(Layer* aLayer, Matrix4x4* aTransform)
{
// Start with the animated transform if there is one
*aTransform =
(aLayer->AsLayerComposite()->GetShadowTransformSetByAnimation()
? aLayer->GetLocalTransform()
: aLayer->GetTransform());
}
static void
TransformClipRect(Layer* aLayer,
const Matrix4x4& aTransform)
{
MOZ_ASSERT(aTransform.Is2D());
const Maybe<ParentLayerIntRect>& clipRect = aLayer->AsLayerComposite()->GetShadowClipRect();
if (clipRect) {
ParentLayerIntRect transformed = TransformTo<ParentLayerPixel>(aTransform, *clipRect);
aLayer->AsLayerComposite()->SetShadowClipRect(Some(transformed));
}
}
/**
* Set the given transform as the shadow transform on the layer, assuming
* that the given transform already has the pre- and post-scales applied.
* That is, this function cancels out the pre- and post-scales from aTransform
* before setting it as the shadow transform on the layer, so that when
* the layer's effective transform is computed, the pre- and post-scales will
* only be applied once.
*/
static void
SetShadowTransform(Layer* aLayer, Matrix4x4 aTransform)
{
if (ContainerLayer* c = aLayer->AsContainerLayer()) {
aTransform.PreScale(1.0f / c->GetPreXScale(),
1.0f / c->GetPreYScale(),
1);
}
aTransform.PostScale(1.0f / aLayer->GetPostXScale(),
1.0f / aLayer->GetPostYScale(),
1);
aLayer->AsLayerComposite()->SetShadowTransform(aTransform);
}
static void
TranslateShadowLayer(Layer* aLayer,
const gfxPoint& aTranslation,
bool aAdjustClipRect)
{
// This layer might also be a scrollable layer and have an async transform.
// To make sure we don't clobber that, we start with the shadow transform.
// (i.e. GetLocalTransform() instead of GetTransform()).
// Note that the shadow transform is reset on every frame of composition so
// we don't have to worry about the adjustments compounding over successive
// frames.
Matrix4x4 layerTransform = aLayer->GetLocalTransform();
// Apply the translation to the layer transform.
layerTransform.PostTranslate(aTranslation.x, aTranslation.y, 0);
SetShadowTransform(aLayer, layerTransform);
aLayer->AsLayerComposite()->SetShadowTransformSetByAnimation(false);
if (aAdjustClipRect) {
TransformClipRect(aLayer, Matrix4x4::Translation(aTranslation.x, aTranslation.y, 0));
}
// If a fixed- or sticky-position layer has a mask layer, that mask should
// move along with the layer, so apply the translation to the mask layer too.
if (Layer* maskLayer = aLayer->GetMaskLayer()) {
TranslateShadowLayer(maskLayer, aTranslation, false);
}
}
static void
AccumulateLayerTransforms(Layer* aLayer,
Layer* aAncestor,
Matrix4x4& aMatrix)
{
// Accumulate the transforms between this layer and the subtree root layer.
for (Layer* l = aLayer; l && l != aAncestor; l = l->GetParent()) {
Matrix4x4 transform;
GetBaseTransform(l, &transform);
aMatrix *= transform;
}
}
static LayerPoint
GetLayerFixedMarginsOffset(Layer* aLayer,
const ScreenMargin& aFixedLayerMargins)
{
// Work out the necessary translation, in root scrollable layer space.
// Because fixed layer margins are stored relative to the root scrollable
// layer, we can just take the difference between these values.
LayerPoint translation;
const LayerPoint& anchor = aLayer->GetFixedPositionAnchor();
if (anchor.x > 0) {
translation.x -= aFixedLayerMargins.right;
} else {
translation.x += aFixedLayerMargins.left;
}
if (anchor.y > 0) {
translation.y -= aFixedLayerMargins.bottom;
} else {
translation.y += aFixedLayerMargins.top;
}
return translation;
}
static gfxFloat
IntervalOverlap(gfxFloat aTranslation, gfxFloat aMin, gfxFloat aMax)
{
// Determine the amount of overlap between the 1D vector |aTranslation|
// and the interval [aMin, aMax].
if (aTranslation > 0) {
return std::max(0.0, std::min(aMax, aTranslation) - std::max(aMin, 0.0));
} else {
return std::min(0.0, std::max(aMin, aTranslation) - std::min(aMax, 0.0));
}
}
void
AsyncCompositionManager::AlignFixedAndStickyLayers(Layer* aLayer,
Layer* aTransformedSubtreeRoot,
FrameMetrics::ViewID aTransformScrollId,
const Matrix4x4& aPreviousTransformForRoot,
const Matrix4x4& aCurrentTransformForRoot,
const ScreenMargin& aFixedLayerMargins)
{
bool isRootFixedForSubtree = aLayer->GetIsFixedPosition() &&
aLayer->GetFixedPositionScrollContainerId() == aTransformScrollId &&
!aLayer->GetParent()->GetIsFixedPosition();
bool isStickyForSubtree = aLayer->GetIsStickyPosition() &&
aLayer->GetStickyScrollContainerId() == aTransformScrollId;
bool isFixedOrSticky = (isRootFixedForSubtree || isStickyForSubtree);
// We want to process all the fixed and sticky children of
// aTransformedSubtreeRoot. Also, once we do encounter such a child, we don't
// need to recurse any deeper because the fixed layers are relative to their
// nearest scrollable layer.
if (!isFixedOrSticky) {
// ApplyAsyncContentTransformToTree will call this function again for
// nested scrollable layers, so we don't need to recurse if the layer is
// scrollable.
for (Layer* child = aLayer->GetFirstChild(); child; child = child->GetNextSibling()) {
AlignFixedAndStickyLayers(child, aTransformedSubtreeRoot, aTransformScrollId,
aPreviousTransformForRoot,
aCurrentTransformForRoot, aFixedLayerMargins);
}
return;
}
// Insert a translation so that the position of the anchor point is the same
// before and after the change to the transform of aTransformedSubtreeRoot.
// Accumulate the transforms between this layer and the subtree root layer.
Matrix4x4 ancestorTransform;
AccumulateLayerTransforms(aLayer->GetParent(), aTransformedSubtreeRoot,
ancestorTransform);
// Calculate the cumulative transforms between the subtree root with the
// old transform and the current transform.
Matrix4x4 oldCumulativeTransform = ancestorTransform * aPreviousTransformForRoot;
Matrix4x4 newCumulativeTransform = ancestorTransform * aCurrentTransformForRoot;
if (newCumulativeTransform.IsSingular()) {
return;
}
Matrix4x4 newCumulativeTransformInverse = newCumulativeTransform.Inverse();
// Now work out the translation necessary to make sure the layer doesn't
// move given the new sub-tree root transform.
Matrix4x4 layerTransform;
GetBaseTransform(aLayer, &layerTransform);
// Calculate any offset necessary, in previous transform sub-tree root
// space. This is used to make sure fixed position content respects
// content document fixed position margins.
LayerPoint offsetInOldSubtreeLayerSpace = GetLayerFixedMarginsOffset(aLayer, aFixedLayerMargins);
// Add the above offset to the anchor point so we can offset the layer by
// and amount that's specified in old subtree layer space.
const LayerPoint& anchorInOldSubtreeLayerSpace = aLayer->GetFixedPositionAnchor();
LayerPoint offsetAnchorInOldSubtreeLayerSpace = anchorInOldSubtreeLayerSpace + offsetInOldSubtreeLayerSpace;
// Add the local layer transform to the two points to make the equation
// below this section more convenient.
Point anchor(anchorInOldSubtreeLayerSpace.x, anchorInOldSubtreeLayerSpace.y);
Point offsetAnchor(offsetAnchorInOldSubtreeLayerSpace.x, offsetAnchorInOldSubtreeLayerSpace.y);
Point locallyTransformedAnchor = layerTransform * anchor;
Point locallyTransformedOffsetAnchor = layerTransform * offsetAnchor;
// Transforming the locallyTransformedAnchor by oldCumulativeTransform
// returns the layer's anchor point relative to the parent of
// aTransformedSubtreeRoot, before the new transform was applied.
// Then, applying newCumulativeTransformInverse maps that point relative
// to the layer's parent, which is the same coordinate space as
// locallyTransformedAnchor again, allowing us to subtract them and find
// out the offset necessary to make sure the layer stays stationary.
Point oldAnchorPositionInNewSpace =
newCumulativeTransformInverse * (oldCumulativeTransform * locallyTransformedOffsetAnchor);
Point translation = oldAnchorPositionInNewSpace - locallyTransformedAnchor;
if (aLayer->GetIsStickyPosition()) {
// For sticky positioned layers, the difference between the two rectangles
// defines a pair of translation intervals in each dimension through which
// the layer should not move relative to the scroll container. To
// accomplish this, we limit each dimension of the |translation| to that
// part of it which overlaps those intervals.
const LayerRect& stickyOuter = aLayer->GetStickyScrollRangeOuter();
const LayerRect& stickyInner = aLayer->GetStickyScrollRangeInner();
translation.y = IntervalOverlap(translation.y, stickyOuter.y, stickyOuter.YMost()) -
IntervalOverlap(translation.y, stickyInner.y, stickyInner.YMost());
translation.x = IntervalOverlap(translation.x, stickyOuter.x, stickyOuter.XMost()) -
IntervalOverlap(translation.x, stickyInner.x, stickyInner.XMost());
}
// Finally, apply the translation to the layer transform. Note that in
// general we need to apply the same translation to the layer's clip rect, so
// that the effective transform on the clip rect takes it back to where it was
// originally, had there been no async scroll. In the case where the
// fixed/sticky layer is the same as aTransformedSubtreeRoot, then the clip
// rect is not affected by the scroll-induced async scroll transform anyway
// (since the clip is applied post-transform) so we don't need to make the
// adjustment.
TranslateShadowLayer(aLayer, ThebesPoint(translation), aLayer != aTransformedSubtreeRoot);
}
static void
SampleValue(float aPortion, Animation& aAnimation, StyleAnimationValue& aStart,
StyleAnimationValue& aEnd, Animatable* aValue)
{
StyleAnimationValue interpolatedValue;
NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() ||
aStart.GetUnit() == StyleAnimationValue::eUnit_None ||
aEnd.GetUnit() == StyleAnimationValue::eUnit_None,
"Must have same unit");
StyleAnimationValue::Interpolate(aAnimation.property(), aStart, aEnd,
aPortion, interpolatedValue);
if (aAnimation.property() == eCSSProperty_opacity) {
*aValue = interpolatedValue.GetFloatValue();
return;
}
nsCSSValueSharedList* interpolatedList =
interpolatedValue.GetCSSValueSharedListValue();
TransformData& data = aAnimation.data().get_TransformData();
nsPoint origin = data.origin();
// we expect all our transform data to arrive in device pixels
Point3D transformOrigin = data.transformOrigin();
Point3D perspectiveOrigin = data.perspectiveOrigin();
nsDisplayTransform::FrameTransformProperties props(interpolatedList,
transformOrigin,
perspectiveOrigin,
data.perspective());
Matrix4x4 transform =
nsDisplayTransform::GetResultingTransformMatrix(props, origin,
data.appUnitsPerDevPixel(),
&data.bounds());
Point3D scaledOrigin =
Point3D(NS_round(NSAppUnitsToFloatPixels(origin.x, data.appUnitsPerDevPixel())),
NS_round(NSAppUnitsToFloatPixels(origin.y, data.appUnitsPerDevPixel())),
0.0f);
transform.PreTranslate(scaledOrigin);
InfallibleTArray<TransformFunction> functions;
functions.AppendElement(TransformMatrix(transform));
*aValue = functions;
}
static bool
SampleAnimations(Layer* aLayer, TimeStamp aPoint)
{
AnimationArray& animations = aLayer->GetAnimations();
InfallibleTArray<AnimData>& animationData = aLayer->GetAnimationData();
bool activeAnimations = false;
// Process in order, since later animations override earlier ones.
for (size_t i = 0, iEnd = animations.Length(); i < iEnd; ++i) {
Animation& animation = animations[i];
AnimData& animData = animationData[i];
activeAnimations = true;
MOZ_ASSERT(!animation.startTime().IsNull(),
"Failed to resolve start time of pending animations");
TimeDuration elapsedDuration =
(aPoint - animation.startTime()).MultDouble(animation.playbackRate());
// 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::KeyframeEffectReadOnly::GetComputedTimingAt(
Nullable<TimeDuration>(elapsedDuration), timing);
MOZ_ASSERT(0.0 <= computedTiming.mProgress &&
computedTiming.mProgress <= 1.0,
"iteration progress should be in [0-1]");
int segmentIndex = 0;
AnimationSegment* segment = animation.segments().Elements();
while (segment->endPortion() < computedTiming.mProgress) {
++segment;
++segmentIndex;
}
double positionInSegment =
(computedTiming.mProgress - 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.PostScale(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
SampleAPZAnimations(const LayerMetricsWrapper& aLayer, TimeStamp aSampleTime)
{
bool activeAnimations = false;
for (LayerMetricsWrapper child = aLayer.GetFirstChild(); child;
child = child.GetNextSibling()) {
activeAnimations |= SampleAPZAnimations(child, aSampleTime);
}
if (AsyncPanZoomController* apzc = aLayer.GetApzc()) {
activeAnimations |= apzc->AdvanceAnimations(aSampleTime);
}
return activeAnimations;
}
void
AsyncCompositionManager::RecordShadowTransforms(Layer* aLayer)
{
MOZ_ASSERT(gfxPrefs::CollectScrollTransforms());
MOZ_ASSERT(CompositorParent::IsInCompositorThread());
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
RecordShadowTransforms(child);
}
for (uint32_t i = 0; i < aLayer->GetFrameMetricsCount(); i++) {
AsyncPanZoomController* apzc = aLayer->GetAsyncPanZoomController(i);
if (!apzc) {
continue;
}
gfx::Matrix4x4 shadowTransform = aLayer->AsLayerComposite()->GetShadowTransform();
if (!shadowTransform.Is2D()) {
continue;
}
Matrix transform = shadowTransform.As2D();
if (transform.IsTranslation() && !shadowTransform.IsIdentity()) {
Point translation = transform.GetTranslation();
mLayerTransformRecorder.RecordTransform(aLayer, translation);
return;
}
}
}
Matrix4x4
AdjustForClip(const Matrix4x4& asyncTransform, Layer* aLayer)
{
Matrix4x4 result = asyncTransform;
// Container layers start at the origin, but they are clipped to where they
// actually have content on the screen. The tree transform is meant to apply
// to the clipped area. If the tree transform includes a scale component,
// then applying it to container as-is will produce incorrect results. To
// avoid this, translate the layer so that the clip rect starts at the origin,
// apply the tree transform, and translate back.
if (const Maybe<ParentLayerIntRect>& shadowClipRect = aLayer->AsLayerComposite()->GetShadowClipRect()) {
if (shadowClipRect->TopLeft() != ParentLayerIntPoint()) { // avoid a gratuitous change of basis
result.ChangeBasis(shadowClipRect->x, shadowClipRect->y, 0);
}
}
return result;
}
bool
AsyncCompositionManager::ApplyAsyncContentTransformToTree(Layer *aLayer)
{
bool appliedTransform = false;
for (Layer* child = aLayer->GetFirstChild();
child; child = child->GetNextSibling()) {
appliedTransform |=
ApplyAsyncContentTransformToTree(child);
}
Matrix4x4 oldTransform = aLayer->GetTransform();
Matrix4x4 combinedAsyncTransform;
bool hasAsyncTransform = false;
ScreenMargin fixedLayerMargins(0, 0, 0, 0);
// Each layer has multiple clips. Its local clip, which must move with async
// transforms, and its scrollframe clips, which are the clips between each
// scrollframe and its ancestor scrollframe. Scrollframe clips include the
// composition bounds and any other clips induced by layout.
//
// The final clip for the layer is the intersection of these clips.
Maybe<ParentLayerIntRect> asyncClip = aLayer->GetClipRect();
// The transform of a mask layer is relative to the masked layer's parent
// layer. So whenever we apply an async transform to a layer, we need to
// apply that same transform to the layer's own mask layer.
// A layer can also have "ancestor" mask layers for any rounded clips from
// its ancestor scroll frames. A scroll frame mask layer only needs to be
// async transformed for async scrolls of this scroll frame's ancestor
// scroll frames, not for async scrolls of this scroll frame itself.
// In the loop below, we iterate over scroll frames from inside to outside.
// At each iteration, this array contains the layer's ancestor mask layers
// of all scroll frames inside the current one.
nsTArray<Layer*> ancestorMaskLayers;
for (uint32_t i = 0; i < aLayer->GetFrameMetricsCount(); i++) {
AsyncPanZoomController* controller = aLayer->GetAsyncPanZoomController(i);
if (!controller) {
continue;
}
hasAsyncTransform = true;
ViewTransform asyncTransformWithoutOverscroll;
ParentLayerPoint scrollOffset;
controller->SampleContentTransformForFrame(&asyncTransformWithoutOverscroll,
scrollOffset);
Matrix4x4 overscrollTransform = controller->GetOverscrollTransform();
Matrix4x4 asyncTransform =
Matrix4x4(asyncTransformWithoutOverscroll) * overscrollTransform;
if (!aLayer->IsScrollInfoLayer()) {
controller->MarkAsyncTransformAppliedToContent();
}
const FrameMetrics& metrics = aLayer->GetFrameMetrics(i);
// TODO: When we enable APZ on Fennec, we'll need to call SyncFrameMetrics here.
// When doing so, it might be useful to look at how it was called here before
// bug 1036967 removed the (dead) call.
#if defined(MOZ_ANDROID_APZ)
if (mIsFirstPaint) {
CSSToLayerScale geckoZoom = metrics.LayersPixelsPerCSSPixel().ToScaleFactor();
LayerIntPoint scrollOffsetLayerPixels = RoundedToInt(metrics.GetScrollOffset() * geckoZoom);
mContentRect = metrics.GetScrollableRect();
SetFirstPaintViewport(scrollOffsetLayerPixels,
geckoZoom,
mContentRect);
}
#endif
mIsFirstPaint = false;
mLayersUpdated = false;
// Transform the current local clip by this APZC's async transform. If we're
// using containerful scrolling, then the clip is not part of the scrolled
// frame and should not be transformed.
if (asyncClip && !metrics.UsesContainerScrolling()) {
MOZ_ASSERT(asyncTransform.Is2D());
asyncClip = Some(TransformTo<ParentLayerPixel>(asyncTransform, *asyncClip));
}
// Combine the local clip with the ancestor scrollframe clip. This is not
// included in the async transform above, since the ancestor clip should not
// move with this APZC.
if (metrics.HasClipRect()) {
ParentLayerIntRect clip = metrics.ClipRect();
if (asyncClip) {
asyncClip = Some(clip.Intersect(*asyncClip));
} else {
asyncClip = Some(clip);
}
}
// Do the same for the ancestor mask layers: ancestorMaskLayers contains
// the ancestor mask layers for scroll frames *inside* the current scroll
// frame, so these are the ones we need to shift by our async transform.
for (Layer* ancestorMaskLayer : ancestorMaskLayers) {
SetShadowTransform(ancestorMaskLayer,
ancestorMaskLayer->GetLocalTransform() * asyncTransform);
}
// Append the ancestor mask layer for this scroll frame to ancestorMaskLayers.
if (metrics.GetMaskLayerIndex()) {
size_t maskLayerIndex = metrics.GetMaskLayerIndex().value();
Layer* ancestorMaskLayer = aLayer->GetAncestorMaskLayerAt(maskLayerIndex);
ancestorMaskLayers.AppendElement(ancestorMaskLayer);
}
combinedAsyncTransform *= asyncTransform;
// For the purpose of aligning fixed and sticky layers, we disregard
// the overscroll transform as well as any OMTA transform when computing the
// 'aCurrentTransformForRoot' parameter. This ensures that the overscroll
// and OMTA transforms are not unapplied, and therefore that the visual
// effects apply to fixed and sticky layers. We do this by using
// GetTransform() as the base transform rather than GetLocalTransform(),
// which would include those factors.
Matrix4x4 transformWithoutOverscrollOrOmta = aLayer->GetTransform() *
AdjustForClip(asyncTransformWithoutOverscroll, aLayer);
// Since fixed/sticky layers are relative to their nearest scrolling ancestor,
// we use the ViewID from the bottommost scrollable metrics here.
AlignFixedAndStickyLayers(aLayer, aLayer, metrics.GetScrollId(), oldTransform,
transformWithoutOverscrollOrOmta, fixedLayerMargins);
}
if (hasAsyncTransform) {
if (asyncClip) {
aLayer->AsLayerComposite()->SetShadowClipRect(asyncClip);
}
// Apply the APZ transform on top of GetLocalTransform() here (rather than
// GetTransform()) in case the OMTA code in SampleAnimations already set a
// shadow transform; in that case we want to apply ours on top of that one
// rather than clobber it.
SetShadowTransform(aLayer,
aLayer->GetLocalTransform() * AdjustForClip(combinedAsyncTransform, aLayer));
// Do the same for the layer's own mask layer, if it has one.
if (Layer* maskLayer = aLayer->GetMaskLayer()) {
SetShadowTransform(maskLayer,
maskLayer->GetLocalTransform() * combinedAsyncTransform);
}
appliedTransform = true;
}
if (aLayer->GetScrollbarDirection() != Layer::NONE) {
ApplyAsyncTransformToScrollbar(aLayer);
}
return appliedTransform;
}
static bool
LayerIsScrollbarTarget(const LayerMetricsWrapper& aTarget, Layer* aScrollbar)
{
AsyncPanZoomController* apzc = aTarget.GetApzc();
if (!apzc) {
return false;
}
const FrameMetrics& metrics = aTarget.Metrics();
if (metrics.GetScrollId() != aScrollbar->GetScrollbarTargetContainerId()) {
return false;
}
return !aTarget.IsScrollInfoLayer();
}
static void
ApplyAsyncTransformToScrollbarForContent(Layer* aScrollbar,
const LayerMetricsWrapper& aContent,
bool aScrollbarIsDescendant)
{
// We only apply the transform if the scroll-target layer has non-container
// children (i.e. when it has some possibly-visible content). This is to
// avoid moving scroll-bars in the situation that only a scroll information
// layer has been built for a scroll frame, as this would result in a
// disparity between scrollbars and visible content.
if (aContent.IsScrollInfoLayer()) {
return;
}
const FrameMetrics& metrics = aContent.Metrics();
AsyncPanZoomController* apzc = aContent.GetApzc();
Matrix4x4 asyncTransform = apzc->GetCurrentAsyncTransform();
// |asyncTransform| represents the amount by which we have scrolled and
// zoomed since the last paint. Because the scrollbar was sized and positioned based
// on the painted content, we need to adjust it based on asyncTransform so that
// it reflects what the user is actually seeing now.
Matrix4x4 scrollbarTransform;
if (aScrollbar->GetScrollbarDirection() == Layer::VERTICAL) {
const ParentLayerCoord asyncScrollY = asyncTransform._42;
const float asyncZoomY = asyncTransform._22;
// The scroll thumb needs to be scaled in the direction of scrolling by the
// inverse of the async zoom. This is because zooming in decreases the
// fraction of the whole srollable rect that is in view.
const float yScale = 1.f / asyncZoomY;
// Note: |metrics.GetZoom()| doesn't yet include the async zoom.
const CSSToParentLayerScale effectiveZoom(metrics.GetZoom().yScale * asyncZoomY);
// Here we convert the scrollbar thumb ratio into a true unitless ratio by
// dividing out the conversion factor from the scrollframe's parent's space
// to the scrollframe's space.
const float ratio = aScrollbar->GetScrollbarThumbRatio() /
(metrics.GetPresShellResolution() * asyncZoomY);
// The scroll thumb needs to be translated in opposite direction of the
// async scroll. This is because scrolling down, which translates the layer
// content up, should result in moving the scroll thumb down.
ParentLayerCoord yTranslation = -asyncScrollY * ratio;
// The scroll thumb additionally needs to be translated to compensate for
// the scale applied above. The origin with respect to which the scale is
// applied is the origin of the entire scrollbar, rather than the origin of
// the scroll thumb (meaning, for a vertical scrollbar it's at the top of
// the composition bounds). This means that empty space above the thumb
// is scaled too, effectively translating the thumb. We undo that
// translation here.
// (One can think of the adjustment being done to the translation here as
// a change of basis. We have a method to help with that,
// Matrix4x4::ChangeBasis(), but it wouldn't necessarily make the code
// cleaner in this case).
const CSSCoord thumbOrigin = (metrics.GetScrollOffset().y * ratio);
const CSSCoord thumbOriginScaled = thumbOrigin * yScale;
const CSSCoord thumbOriginDelta = thumbOriginScaled - thumbOrigin;
const ParentLayerCoord thumbOriginDeltaPL = thumbOriginDelta * effectiveZoom;
yTranslation -= thumbOriginDeltaPL;
if (metrics.IsRootContent()) {
// Scrollbar for the root are painted at the same resolution as the
// content. Since the coordinate space we apply this transform in includes
// the resolution, we need to adjust for it as well here. Note that in
// another metrics.IsRootContent() hunk below we apply a
// resolution-cancelling transform which ensures the scroll thumb isn't
// actually rendered at a larger scale.
yTranslation *= metrics.GetPresShellResolution();
}
scrollbarTransform.PostScale(1.f, yScale, 1.f);
scrollbarTransform.PostTranslate(0, yTranslation, 0);
}
if (aScrollbar->GetScrollbarDirection() == Layer::HORIZONTAL) {
// See detailed comments under the VERTICAL case.
const ParentLayerCoord asyncScrollX = asyncTransform._41;
const float asyncZoomX = asyncTransform._11;
const float xScale = 1.f / asyncZoomX;
const CSSToParentLayerScale effectiveZoom(metrics.GetZoom().xScale * asyncZoomX);
const float ratio = aScrollbar->GetScrollbarThumbRatio() /
(metrics.GetPresShellResolution() * asyncZoomX);
ParentLayerCoord xTranslation = -asyncScrollX * ratio;
const CSSCoord thumbOrigin = (metrics.GetScrollOffset().x * ratio);
const CSSCoord thumbOriginScaled = thumbOrigin * xScale;
const CSSCoord thumbOriginDelta = thumbOriginScaled - thumbOrigin;
const ParentLayerCoord thumbOriginDeltaPL = thumbOriginDelta * effectiveZoom;
xTranslation -= thumbOriginDeltaPL;
if (metrics.IsRootContent()) {
xTranslation *= metrics.GetPresShellResolution();
}
scrollbarTransform.PostScale(xScale, 1.f, 1.f);
scrollbarTransform.PostTranslate(xTranslation, 0, 0);
}
Matrix4x4 transform = aScrollbar->GetLocalTransform() * scrollbarTransform;
Matrix4x4 compensation;
// If the scrollbar layer is for the root then the content's resolution
// applies to the scrollbar as well. Since we don't actually want the scroll
// thumb's size to vary with the zoom (other than its length reflecting the
// fraction of the scrollable length that's in view, which is taken care of
// above), we apply a transform to cancel out this resolution.
if (metrics.IsRootContent()) {
compensation =
Matrix4x4::Scaling(metrics.GetPresShellResolution(),
metrics.GetPresShellResolution(),
1.0f).Inverse();
}
// If the scrollbar layer is a child of the content it is a scrollbar for,
// then we need to adjust for any async transform (including an overscroll
// transform) on the content. This needs to be cancelled out because layout
// positions and sizes the scrollbar on the assumption that there is no async
// transform, and without this adjustment the scrollbar will end up in the
// wrong place.
//
// Note that since the async transform is applied on top of the content's
// regular transform, we need to make sure to unapply the async transform in
// the same coordinate space. This requires applying the content transform
// and then unapplying it after unapplying the async transform.
if (aScrollbarIsDescendant) {
Matrix4x4 asyncUntransform = (asyncTransform * apzc->GetOverscrollTransform()).Inverse();
Matrix4x4 contentTransform = aContent.GetTransform();
Matrix4x4 contentUntransform = contentTransform.Inverse();
Matrix4x4 asyncCompensation = contentTransform
* asyncUntransform
* contentUntransform;
compensation = compensation * asyncCompensation;
// We also need to make a corresponding change on the clip rect of all the
// layers on the ancestor chain from the scrollbar layer up to but not
// including the layer with the async transform. Otherwise the scrollbar
// shifts but gets clipped and so appears to flicker.
for (Layer* ancestor = aScrollbar; ancestor != aContent.GetLayer(); ancestor = ancestor->GetParent()) {
TransformClipRect(ancestor, asyncCompensation);
}
}
transform = transform * compensation;
SetShadowTransform(aScrollbar, transform);
}
static LayerMetricsWrapper
FindScrolledLayerRecursive(Layer* aScrollbar, const LayerMetricsWrapper& aSubtreeRoot)
{
if (LayerIsScrollbarTarget(aSubtreeRoot, aScrollbar)) {
return aSubtreeRoot;
}
for (LayerMetricsWrapper child = aSubtreeRoot.GetFirstChild();
child;
child = child.GetNextSibling())
{
// Do not recurse into RefLayers, since our initial aSubtreeRoot is the
// root (or RefLayer root) of a single layer space to search.
if (child.AsRefLayer()) {
continue;
}
LayerMetricsWrapper target = FindScrolledLayerRecursive(aScrollbar, child);
if (target) {
return target;
}
}
return LayerMetricsWrapper();
}
static LayerMetricsWrapper
FindScrolledLayerForScrollbar(Layer* aScrollbar, bool* aOutIsAncestor)
{
// First check if the scrolled layer is an ancestor of the scrollbar layer.
LayerMetricsWrapper root(aScrollbar->Manager()->GetRoot());
LayerMetricsWrapper prevAncestor(aScrollbar);
for (LayerMetricsWrapper ancestor(aScrollbar); ancestor; ancestor = ancestor.GetParent()) {
// Don't walk into remote layer trees; the scrollbar will always be in
// the same layer space.
if (ancestor.AsRefLayer()) {
root = prevAncestor;
break;
}
prevAncestor = ancestor;
if (LayerIsScrollbarTarget(ancestor, aScrollbar)) {
*aOutIsAncestor = true;
return ancestor;
}
}
// Search the entire layer space of the scrollbar.
return FindScrolledLayerRecursive(aScrollbar, root);
}
void
AsyncCompositionManager::ApplyAsyncTransformToScrollbar(Layer* aLayer)
{
// If this layer corresponds to a scrollbar, then there should be a layer that
// is a previous sibling or a parent that has a matching ViewID on its FrameMetrics.
// That is the content that this scrollbar is for. We pick up the transient
// async transform from that layer and use it to update the scrollbar position.
// Note that it is possible that the content layer is no longer there; in
// this case we don't need to do anything because there can't be an async
// transform on the content.
bool isAncestor = false;
const LayerMetricsWrapper& scrollTarget = FindScrolledLayerForScrollbar(aLayer, &isAncestor);
if (scrollTarget) {
ApplyAsyncTransformToScrollbarForContent(aLayer, scrollTarget, isAncestor);
}
}
void
AsyncCompositionManager::TransformScrollableLayer(Layer* aLayer)
{
FrameMetrics metrics = LayerMetricsWrapper::TopmostScrollableMetrics(aLayer);
if (!metrics.IsScrollable()) {
// On Fennec it's possible that the there is no scrollable layer in the
// tree, and this function just gets called with the root layer. In that
// case TopmostScrollableMetrics will return an empty FrameMetrics but we
// still want to use the actual non-scrollable metrics from the layer.
metrics = LayerMetricsWrapper::BottommostMetrics(aLayer);
}
// We must apply the resolution scale before a pan/zoom transform, so we call
// GetTransform here.
Matrix4x4 oldTransform = aLayer->GetTransform();
CSSToLayerScale geckoZoom = metrics.LayersPixelsPerCSSPixel().ToScaleFactor();
LayerIntPoint scrollOffsetLayerPixels = RoundedToInt(metrics.GetScrollOffset() * geckoZoom);
if (mIsFirstPaint) {
mContentRect = metrics.GetScrollableRect();
SetFirstPaintViewport(scrollOffsetLayerPixels,
geckoZoom,
mContentRect);
mIsFirstPaint = false;
} else if (!metrics.GetScrollableRect().IsEqualEdges(mContentRect)) {
mContentRect = metrics.GetScrollableRect();
SetPageRect(mContentRect);
}
// We synchronise the viewport information with Java after sending the above
// notifications, so that Java can take these into account in its response.
// Calculate the absolute display port to send to Java
LayerIntRect displayPort = RoundedToInt(
(metrics.GetCriticalDisplayPort().IsEmpty()
? metrics.GetDisplayPort()
: metrics.GetCriticalDisplayPort()
) * geckoZoom);
displayPort += scrollOffsetLayerPixels;
ScreenMargin fixedLayerMargins(0, 0, 0, 0);
// Ideally we would initialize userZoom to AsyncPanZoomController::CalculateResolution(metrics)
// but this causes a reftest-ipc test to fail (see bug 883646 comment 27). The reason for this
// appears to be that metrics.mZoom is poorly initialized in some scenarios. In these scenarios,
// however, we can assume there is no async zooming in progress and so the following statement
// works fine.
CSSToParentLayerScale userZoom(metrics.GetDevPixelsPerCSSPixel()
// This function only applies to the root scrollable frame,
// for which we can assume that x and y scales are equal.
* metrics.GetCumulativeResolution().ToScaleFactor()
* LayerToParentLayerScale(1));
ParentLayerRect userRect(metrics.GetScrollOffset() * userZoom,
metrics.GetCompositionBounds().Size());
SyncViewportInfo(displayPort, geckoZoom, mLayersUpdated, mPaintSyncId,
userRect, userZoom, fixedLayerMargins);
mLayersUpdated = false;
mPaintSyncId = 0;
// Handle transformations for asynchronous panning and zooming. We determine the
// zoom used by Gecko from the transformation set on the root layer, and we
// determine the scroll offset used by Gecko from the frame metrics of the
// primary scrollable layer. We compare this to the user zoom and scroll
// offset in the view transform we obtained from Java in order to compute the
// transformation we need to apply.
ParentLayerPoint geckoScroll(0, 0);
if (metrics.IsScrollable()) {
geckoScroll = metrics.GetScrollOffset() * userZoom;
}
LayerToParentLayerScale asyncZoom = userZoom / metrics.LayersPixelsPerCSSPixel().ToScaleFactor();
ParentLayerPoint translation = userRect.TopLeft() - geckoScroll;
Matrix4x4 treeTransform = ViewTransform(asyncZoom, -translation);
// Apply the tree transform on top of GetLocalTransform() here (rather than
// GetTransform()) in case the OMTA code in SampleAnimations already set a
// shadow transform; in that case we want to apply ours on top of that one
// rather than clobber it.
SetShadowTransform(aLayer, aLayer->GetLocalTransform() * treeTransform);
// Make sure that overscroll and under-zoom are represented in the old
// transform so that fixed position content moves and scales accordingly.
// These calculations will effectively scale and offset fixed position layers
// in screen space when the compensatory transform is performed in
// AlignFixedAndStickyLayers.
ParentLayerRect contentScreenRect = mContentRect * userZoom;
Point3D overscrollTranslation;
if (userRect.x < contentScreenRect.x) {
overscrollTranslation.x = contentScreenRect.x - userRect.x;
} else if (userRect.XMost() > contentScreenRect.XMost()) {
overscrollTranslation.x = contentScreenRect.XMost() - userRect.XMost();
}
if (userRect.y < contentScreenRect.y) {
overscrollTranslation.y = contentScreenRect.y - userRect.y;
} else if (userRect.YMost() > contentScreenRect.YMost()) {
overscrollTranslation.y = contentScreenRect.YMost() - userRect.YMost();
}
oldTransform.PreTranslate(overscrollTranslation.x,
overscrollTranslation.y,
overscrollTranslation.z);
gfx::Size underZoomScale(1.0f, 1.0f);
if (mContentRect.width * userZoom.scale < metrics.GetCompositionBounds().width) {
underZoomScale.width = (mContentRect.width * userZoom.scale) /
metrics.GetCompositionBounds().width;
}
if (mContentRect.height * userZoom.scale < metrics.GetCompositionBounds().height) {
underZoomScale.height = (mContentRect.height * userZoom.scale) /
metrics.GetCompositionBounds().height;
}
oldTransform.PreScale(underZoomScale.width, underZoomScale.height, 1);
// Make sure fixed position layers don't move away from their anchor points
// when we're asynchronously panning or zooming
AlignFixedAndStickyLayers(aLayer, aLayer, metrics.GetScrollId(), oldTransform,
aLayer->GetLocalTransform(), fixedLayerMargins);
// For Fennec we want to expand the root scrollable layer clip rect based on
// the fixed position margins. In particular, we want this while the dynamic
// toolbar is in the process of sliding offscreen and the area of the
// LayerView visible to the user is larger than the viewport size that Gecko
// knows about (and therefore larger than the clip rect). We could also just
// clear the clip rect on aLayer entirely but this seems more precise.
Maybe<ParentLayerIntRect> rootClipRect = aLayer->AsLayerComposite()->GetShadowClipRect();
if (rootClipRect && fixedLayerMargins != ScreenMargin()) {
#ifndef MOZ_WIDGET_ANDROID
// We should never enter here on anything other than Fennec, since
// fixedLayerMargins should be empty everywhere else.
MOZ_ASSERT(false);
#endif
ParentLayerRect rect(rootClipRect.value());
rect.Deflate(ViewAs<ParentLayerPixel>(fixedLayerMargins,
PixelCastJustification::ScreenIsParentLayerForRoot));
aLayer->AsLayerComposite()->SetShadowClipRect(Some(RoundedOut(rect)));
}
}
void
AsyncCompositionManager::GetFrameUniformity(FrameUniformityData* aOutData)
{
MOZ_ASSERT(CompositorParent::IsInCompositorThread());
mLayerTransformRecorder.EndTest(aOutData);
}
bool
AsyncCompositionManager::TransformShadowTree(TimeStamp aCurrentFrame,
TransformsToSkip aSkip)
{
PROFILER_LABEL("AsyncCompositionManager", "TransformShadowTree",
js::ProfileEntry::Category::GRAPHICS);
Layer* root = mLayerManager->GetRoot();
if (!root) {
return false;
}
// First, compute and set the shadow transforms from OMT animations.
// NB: we must sample animations *before* sampling pan/zoom
// transforms.
bool wantNextFrame = SampleAnimations(root, aCurrentFrame);
if (!(aSkip & TransformsToSkip::APZ)) {
// FIXME/bug 775437: unify this interface with the ~native-fennec
// derived code
//
// Attempt to apply an async content transform to any layer that has
// an async pan zoom controller (which means that it is rendered
// async using Gecko). If this fails, fall back to transforming the
// primary scrollable layer. "Failing" here means that we don't
// find a frame that is async scrollable. Note that the fallback
// code also includes Fennec which is rendered async. Fennec uses
// its own platform-specific async rendering that is done partially
// in Gecko and partially in Java.
wantNextFrame |= SampleAPZAnimations(LayerMetricsWrapper(root), aCurrentFrame);
if (!ApplyAsyncContentTransformToTree(root)) {
nsAutoTArray<Layer*,1> scrollableLayers;
#ifdef MOZ_WIDGET_ANDROID
mLayerManager->GetRootScrollableLayers(scrollableLayers);
#else
mLayerManager->GetScrollableLayers(scrollableLayers);
#endif
for (uint32_t i = 0; i < scrollableLayers.Length(); i++) {
if (scrollableLayers[i]) {
TransformScrollableLayer(scrollableLayers[i]);
}
}
}
}
LayerComposite* rootComposite = root->AsLayerComposite();
gfx::Matrix4x4 trans = rootComposite->GetShadowTransform();
trans *= gfx::Matrix4x4::From2D(mWorldTransform);
rootComposite->SetShadowTransform(trans);
if (gfxPrefs::CollectScrollTransforms()) {
RecordShadowTransforms(root);
}
return wantNextFrame;
}
void
AsyncCompositionManager::SetFirstPaintViewport(const LayerIntPoint& aOffset,
const CSSToLayerScale& aZoom,
const CSSRect& aCssPageRect)
{
#ifdef MOZ_WIDGET_ANDROID
AndroidBridge::Bridge()->SetFirstPaintViewport(aOffset, aZoom, aCssPageRect);
#endif
}
void
AsyncCompositionManager::SetPageRect(const CSSRect& aCssPageRect)
{
#ifdef MOZ_WIDGET_ANDROID
AndroidBridge::Bridge()->SetPageRect(aCssPageRect);
#endif
}
void
AsyncCompositionManager::SyncViewportInfo(const LayerIntRect& aDisplayPort,
const CSSToLayerScale& aDisplayResolution,
bool aLayersUpdated,
int32_t aPaintSyncId,
ParentLayerRect& aScrollRect,
CSSToParentLayerScale& aScale,
ScreenMargin& aFixedLayerMargins)
{
#ifdef MOZ_WIDGET_ANDROID
AndroidBridge::Bridge()->SyncViewportInfo(aDisplayPort,
aDisplayResolution,
aLayersUpdated,
aPaintSyncId,
aScrollRect,
aScale,
aFixedLayerMargins);
#endif
}
void
AsyncCompositionManager::SyncFrameMetrics(const ParentLayerPoint& aScrollOffset,
float aZoom,
const CSSRect& aCssPageRect,
bool aLayersUpdated,
const CSSRect& aDisplayPort,
const CSSToLayerScale& aDisplayResolution,
bool aIsFirstPaint,
ScreenMargin& aFixedLayerMargins)
{
#ifdef MOZ_WIDGET_ANDROID
AndroidBridge::Bridge()->SyncFrameMetrics(aScrollOffset, aZoom, aCssPageRect,
aLayersUpdated, aDisplayPort,
aDisplayResolution, aIsFirstPaint,
aFixedLayerMargins);
#endif
}
} // namespace layers
} // namespace mozilla
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