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Bug 1453364 - Update scrollbar transforms separately from OMTA transforms. r=nical

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Although they still happen in the same transaction, they are done in two
separate frame messages. This results in better encapsulated code on the
C++ side since we don't have to pass around an array of properties, and
will simplify future changes to update these properties at render time
rather than at GenerateFrame time.

MozReview-Commit-ID: 9qUkHX7gmD1

--HG--
extra : rebase_source : 15a319ba270eb1783815c514ae05c6a72e323dac
This commit is contained in:
Kartikaya Gupta 2018-04-11 15:28:00 -04:00
parent caada858fb
commit cfd585d234
10 changed files with 79 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
gfx/layers/apz/public/APZSampler.h
View File

@ -38,8 +38,7 @@ public:
explicit APZSampler(const RefPtr<APZCTreeManager>& aApz);
bool PushStateToWR(wr::TransactionBuilder& aTxn,
const TimeStamp& aSampleTime,
nsTArray<wr::WrTransformProperty>& aTransformArray);
const TimeStamp& aSampleTime);
bool SampleAnimations(const LayerMetricsWrapper& aLayer,
const TimeStamp& aSampleTime);

7
gfx/layers/apz/src/APZCTreeManager.cpp
View File

@ -532,8 +532,7 @@ APZCTreeManager::UpdateHitTestingTree(LayersId aRootLayerTreeId,
bool
APZCTreeManager::PushStateToWR(wr::TransactionBuilder& aTxn,
const TimeStamp& aSampleTime,
nsTArray<wr::WrTransformProperty>& aTransformArray)
const TimeStamp& aSampleTime)
{
AssertOnSamplerThread();
@ -608,6 +607,7 @@ APZCTreeManager::PushStateToWR(wr::TransactionBuilder& aTxn,
// iteration, it's cleaner and more efficient to do it as a separate pass
// because now we have a populated httnMap which allows O(log n) lookup here,
// resulting in O(n log n) runtime.
nsTArray<wr::WrTransformProperty> scrollbarTransforms;
ForEachNode<ReverseIterator>(mRootNode.get(),
[&](HitTestingTreeNode* aNode)
{
@ -637,10 +637,11 @@ APZCTreeManager::PushStateToWR(wr::TransactionBuilder& aTxn,
scrollTargetNode->IsAncestorOf(aNode),
nullptr);
});
aTransformArray.AppendElement(wr::ToWrTransformProperty(
scrollbarTransforms.AppendElement(wr::ToWrTransformProperty(
aNode->GetScrollbarAnimationId(),
transform));
});
aTxn.AppendTransformProperties(scrollbarTransforms);
return activeAnimations;
}

5
gfx/layers/apz/src/APZCTreeManager.h
View File

@ -201,13 +201,12 @@ public:
* sample time. In effect it is the webrender equivalent of (part of) the
* code in AsyncCompositionManager. If scrollbar transforms need updating
* to reflect the async scroll position, the updated transforms are appended
* to the provided aTransformArray.
* to the provided transaction as well.
* Returns true if any APZ animations are in progress and we need to keep
* compositing.
*/
bool PushStateToWR(wr::TransactionBuilder& aTxn,
const TimeStamp& aSampleTime,
nsTArray<wr::WrTransformProperty>& aTransformArray);
const TimeStamp& aSampleTime);
/**
* Walk the tree of APZCs and flushes the repaint requests for all the APZCS

5
gfx/layers/apz/src/APZSampler.cpp
View File

@ -31,12 +31,11 @@ APZSampler::~APZSampler()
bool
APZSampler::PushStateToWR(wr::TransactionBuilder& aTxn,
const TimeStamp& aSampleTime,
nsTArray<wr::WrTransformProperty>& aTransformArray)
const TimeStamp& aSampleTime)
{
// This function will be removed eventually since we'll have WR pull
// the transforms from APZ instead.
return mApz->PushStateToWR(aTxn, aSampleTime, aTransformArray);
return mApz->PushStateToWR(aTxn, aSampleTime);
}
bool

21
gfx/layers/wr/WebRenderBridgeParent.cpp
View File

@ -533,8 +533,7 @@ WebRenderBridgeParent::UpdateAPZScrollData(const wr::Epoch& aEpoch,
}
bool
WebRenderBridgeParent::PushAPZStateToWR(wr::TransactionBuilder& aTxn,
nsTArray<wr::WrTransformProperty>& aTransformArray)
WebRenderBridgeParent::PushAPZStateToWR(wr::TransactionBuilder& aTxn)
{
CompositorBridgeParent* cbp = GetRootCompositorBridgeParent();
if (!cbp) {
@ -549,7 +548,7 @@ WebRenderBridgeParent::PushAPZStateToWR(wr::TransactionBuilder& aTxn,
if (frameInterval != TimeDuration::Forever()) {
animationTime += frameInterval;
}
return apz->PushStateToWR(aTxn, animationTime, aTransformArray);
return apz->PushStateToWR(aTxn, animationTime);
}
return false;
}
@ -1234,6 +1233,8 @@ WebRenderBridgeParent::CompositeToTarget(gfx::DrawTarget* aTarget, const gfx::In
return;
}
wr::TransactionBuilder txn;
nsTArray<wr::WrOpacityProperty> opacityArray;
nsTArray<wr::WrTransformProperty> transformArray;
@ -1241,10 +1242,14 @@ WebRenderBridgeParent::CompositeToTarget(gfx::DrawTarget* aTarget, const gfx::In
if (!transformArray.IsEmpty() || !opacityArray.IsEmpty()) {
ScheduleGenerateFrame();
}
// We do this even if the arrays are empty, because it will clear out any
// previous properties stored on the WR side, which is desirable. Also, we
// must do this before the PushAPZStateToWR call which will append more
// properties, If we did this after that call, this would clobber those
// properties.
txn.UpdateDynamicProperties(opacityArray, transformArray);
wr::TransactionBuilder txn;
if (PushAPZStateToWR(txn, transformArray)) {
if (PushAPZStateToWR(txn)) {
ScheduleGenerateFrame();
}
@ -1255,10 +1260,6 @@ WebRenderBridgeParent::CompositeToTarget(gfx::DrawTarget* aTarget, const gfx::In
mApi->SetFrameStartTime(startTime);
#endif
if (!transformArray.IsEmpty() || !opacityArray.IsEmpty()) {
txn.UpdateDynamicProperties(opacityArray, transformArray);
}
txn.GenerateFrame();
mApi->SendTransaction(txn);

7
gfx/layers/wr/WebRenderBridgeParent.h
View File

@ -222,10 +222,9 @@ private:
// Have APZ push the async scroll state to WR. Returns true if an APZ
// animation is in effect and we need to schedule another composition.
// If scrollbars need their transforms updated, the provided aTransformArray
// is populated with the property update details.
bool PushAPZStateToWR(wr::TransactionBuilder& aTxn,
nsTArray<wr::WrTransformProperty>& aTransformArray);
// If scrollbars need their transforms updated, the transaction builder
// is populated with the property update details via AppendTransformProperties
bool PushAPZStateToWR(wr::TransactionBuilder& aTxn);
wr::Epoch GetNextWrEpoch();

22
gfx/webrender_bindings/WebRenderAPI.cpp
View File

@ -206,13 +206,21 @@ void
TransactionBuilder::UpdateDynamicProperties(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
const nsTArray<wr::WrTransformProperty>& aTransformArray)
{
wr_transaction_update_dynamic_properties(mTxn,
aOpacityArray.IsEmpty() ?
nullptr : aOpacityArray.Elements(),
aOpacityArray.Length(),
aTransformArray.IsEmpty() ?
nullptr : aTransformArray.Elements(),
aTransformArray.Length());
wr_transaction_update_dynamic_properties(
mTxn,
aOpacityArray.IsEmpty() ? nullptr : aOpacityArray.Elements(),
aOpacityArray.Length(),
aTransformArray.IsEmpty() ? nullptr : aTransformArray.Elements(),
aTransformArray.Length());
}
void
TransactionBuilder::AppendTransformProperties(const nsTArray<wr::WrTransformProperty>& aTransformArray)
{
wr_transaction_append_transform_properties(
mTxn,
aTransformArray.IsEmpty() ? nullptr : aTransformArray.Elements(),
aTransformArray.Length());
}
bool

1
gfx/webrender_bindings/WebRenderAPI.h
View File

@ -77,6 +77,7 @@ public:
void UpdateDynamicProperties(const nsTArray<wr::WrOpacityProperty>& aOpacityArray,
const nsTArray<wr::WrTransformProperty>& aTransformArray);
void AppendTransformProperties(const nsTArray<wr::WrTransformProperty>& aTransformArray);
void SetWindowParameters(const LayoutDeviceIntSize& aWindowSize,
const LayoutDeviceIntRect& aDocRect);

31
gfx/webrender_bindings/src/bindings.rs
View File

@ -1066,8 +1066,6 @@ pub extern "C" fn wr_transaction_update_dynamic_properties(
transform_array: *const WrTransformProperty,
transform_count: usize,
) {
debug_assert!(transform_count > 0 || opacity_count > 0);
let mut properties = DynamicProperties {
transforms: Vec::new(),
floats: Vec::new(),
@ -1101,6 +1099,35 @@ pub extern "C" fn wr_transaction_update_dynamic_properties(
txn.update_dynamic_properties(properties);
}
#[no_mangle]
pub extern "C" fn wr_transaction_append_transform_properties(
txn: &mut Transaction,
transform_array: *const WrTransformProperty,
transform_count: usize,
) {
if transform_count == 0 {
return;
}
let mut properties = DynamicProperties {
transforms: Vec::new(),
floats: Vec::new(),
};
let transform_slice = make_slice(transform_array, transform_count);
for element in transform_slice.iter() {
let prop = PropertyValue {
key: PropertyBindingKey::new(element.id),
value: element.transform.into(),
};
properties.transforms.push(prop);
}
txn.append_dynamic_properties(properties);
}
#[no_mangle]
pub extern "C" fn wr_transaction_scroll_layer(
txn: &mut Transaction,

16
gfx/webrender_bindings/webrender_ffi_generated.h
View File

@ -942,6 +942,11 @@ struct FontInstancePlatformOptions {
};
#endif
struct WrTransformProperty {
uint64_t id;
LayoutTransform transform;
};
struct WrOpacityProperty {
uint64_t id;
float opacity;
@ -952,11 +957,6 @@ struct WrOpacityProperty {
}
};
struct WrTransformProperty {
uint64_t id;
LayoutTransform transform;
};
extern "C" {
/* DO NOT MODIFY THIS MANUALLY! This file was generated using cbindgen.
@ -1597,6 +1597,12 @@ WR_INLINE
WrThreadPool *wr_thread_pool_new()
WR_FUNC;
WR_INLINE
void wr_transaction_append_transform_properties(Transaction *aTxn,
const WrTransformProperty *aTransformArray,
uintptr_t aTransformCount)
WR_FUNC;
WR_INLINE
void wr_transaction_clear_display_list(Transaction *aTxn,
WrEpoch aEpoch,