SurfaceFlinger: support negative phase offset
Store the last 2 present frames to accommodate negative phase offsets.
Test: systrace
Bug: 130191039
Change-Id: Ie4460d4a1b14a2a12f5d2f3c1542e0b837cb761c
diff --git a/services/surfaceflinger/Scheduler/VSyncModulator.h b/services/surfaceflinger/Scheduler/VSyncModulator.h
index 1a0de08..81a7864 100644
--- a/services/surfaceflinger/Scheduler/VSyncModulator.h
+++ b/services/surfaceflinger/Scheduler/VSyncModulator.h
@@ -139,6 +139,19 @@
}
}
+ Offsets getOffsets() {
+ // Early offsets are used if we're in the middle of a refresh rate
+ // change, or if we recently begin a transaction.
+ if (mTransactionStart == Scheduler::TransactionStart::EARLY ||
+ mRemainingEarlyFrameCount > 0 || mRefreshRateChangePending) {
+ return mEarlyOffsets;
+ } else if (mLastFrameUsedRenderEngine) {
+ return mEarlyGlOffsets;
+ } else {
+ return mLateOffsets;
+ }
+ }
+
private:
void updateOffsets() {
const Offsets desired = getOffsets();
@@ -167,19 +180,6 @@
}
}
- Offsets getOffsets() {
- // Early offsets are used if we're in the middle of a refresh rate
- // change, or if we recently begin a transaction.
- if (mTransactionStart == Scheduler::TransactionStart::EARLY ||
- mRemainingEarlyFrameCount > 0 || mRefreshRateChangePending) {
- return mEarlyOffsets;
- } else if (mLastFrameUsedRenderEngine) {
- return mEarlyGlOffsets;
- } else {
- return mLateOffsets;
- }
- }
-
Offsets mLateOffsets;
Offsets mEarlyOffsets;
Offsets mEarlyGlOffsets;