Closed Bug 1356573 Opened 8 years ago Closed 7 years ago

Retain AnimatedGeometryRoot with frame tree

Categories

(Core :: Web Painting, enhancement)

Product:
Core
Component:
Web Painting
Type:
enhancement
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED FIXED
Tracking Flags:
Tracking Status
firefox55 --- affected

People

(Reporter: sinker, Unassigned)

References

(Blocks 1 open bug)

Details

AGRs (AnimatedGeometryRoot) are rarely changed. Retaining AGRs can avoid wasting time on repeatedly building them. AGRs are built during running |BuildDisplayList|. They are maintained by the |DisplayListBuilder|. When a frame is visited for building display list, |AutoBuildingDisplayList| is used to notify |DisplayListBuilder| partly to maintain AGRs. |RecomputeCurrentAnimatedGeometryRoot()| of |DisplayListBuilder| is another place about maintaining AGRs with |DisplayListBuilder|. Whenever a display item is built, |nsDisplayItem| would keep a pointer to current AGR from |DisplayListBuilder|, returned by |FindAnimatedGeometryRootFor()|. FrameLayerBuilder heavily rely on AGRs of items.
We added this as part of retained-dl.
Status: NEW → RESOLVED
Closed: 7 years ago
Resolution: --- → FIXED
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