[sf] Release the currently presented buffer when setBuffer is called
with null
Fixes a regression introduced in T which ignores a setBuffer call
with a null buffer. The expected behavior should be to release the
currently presented buffer from surfaceflinger. The subsequent frame
will not present this layer so the region behind the layer will be
composited instead.
Bug: 241271897
Test: presubmit
Change-Id: Ie06025c59c58cc75a267b783729996a3cbceef45
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index a538c6d..d02d4dd 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -2804,7 +2804,8 @@
currentMaxAcquiredBufferCount);
}
-void Layer::onLayerDisplayed(ftl::SharedFuture<FenceResult> futureFenceResult) {
+void Layer::onLayerDisplayed(ftl::SharedFuture<FenceResult> futureFenceResult,
+ ui::LayerStack layerStack) {
// If we are displayed on multiple displays in a single composition cycle then we would
// need to do careful tracking to enable the use of the mLastClientCompositionFence.
// For example we can only use it if all the displays are client comp, and we need
@@ -2834,8 +2835,7 @@
// transaction doesn't need a previous release fence.
sp<CallbackHandle> ch;
for (auto& handle : mDrawingState.callbackHandles) {
- if (handle->releasePreviousBuffer &&
- mDrawingState.releaseBufferEndpoint == handle->listener) {
+ if (handle->releasePreviousBuffer && mPreviousReleaseBufferEndpoint == handle->listener) {
ch = handle;
break;
}
@@ -2851,6 +2851,7 @@
ch->previousReleaseFences.emplace_back(std::move(futureFenceResult));
ch->name = mName;
}
+ mPreviouslyPresentedLayerStacks.push_back(layerStack);
}
void Layer::onSurfaceFrameCreated(
@@ -2889,8 +2890,7 @@
}
for (auto& handle : mDrawingState.callbackHandles) {
- if (handle->releasePreviousBuffer &&
- mDrawingState.releaseBufferEndpoint == handle->listener) {
+ if (handle->releasePreviousBuffer && mPreviousReleaseBufferEndpoint == handle->listener) {
handle->previousReleaseCallbackId = mPreviousReleaseCallbackId;
break;
}
@@ -3027,14 +3027,22 @@
return true;
}
+void Layer::resetDrawingStateBufferInfo() {
+ mDrawingState.producerId = 0;
+ mDrawingState.frameNumber = 0;
+ mDrawingState.releaseBufferListener = nullptr;
+ mDrawingState.buffer = nullptr;
+ mDrawingState.acquireFence = sp<Fence>::make(-1);
+ mDrawingState.acquireFenceTime = std::make_unique<FenceTime>(mDrawingState.acquireFence);
+ mCallbackHandleAcquireTimeOrFence = mDrawingState.acquireFenceTime->getSignalTime();
+ mDrawingState.releaseBufferEndpoint = nullptr;
+}
+
bool Layer::setBuffer(std::shared_ptr<renderengine::ExternalTexture>& buffer,
const BufferData& bufferData, nsecs_t postTime, nsecs_t desiredPresentTime,
bool isAutoTimestamp, std::optional<nsecs_t> dequeueTime,
const FrameTimelineInfo& info) {
ATRACE_FORMAT("setBuffer %s - hasBuffer=%s", getDebugName(), (buffer ? "true" : "false"));
- if (!buffer) {
- return false;
- }
const bool frameNumberChanged =
bufferData.flags.test(BufferData::BufferDataChange::frameNumberChanged);
@@ -3066,12 +3074,24 @@
mLastClientCompositionFence);
mLastClientCompositionFence = nullptr;
}
- } else {
+ } else if (buffer) {
// if we are latching a buffer for the first time then clear the mLastLatchTime since
// we don't want to incorrectly classify a frame if we miss the desired present time.
updateLastLatchTime(0);
}
+ mDrawingState.desiredPresentTime = desiredPresentTime;
+ mDrawingState.isAutoTimestamp = isAutoTimestamp;
+ mDrawingState.latchedVsyncId = info.vsyncId;
+ mDrawingState.modified = true;
+ if (!buffer) {
+ resetDrawingStateBufferInfo();
+ setTransactionFlags(eTransactionNeeded);
+ mDrawingState.bufferSurfaceFrameTX = nullptr;
+ setFrameTimelineVsyncForBufferlessTransaction(info, postTime);
+ return true;
+ }
+
mDrawingState.producerId = bufferData.producerId;
mDrawingState.barrierProducerId =
std::max(mDrawingState.producerId, mDrawingState.barrierProducerId);
@@ -3082,7 +3102,6 @@
// TODO(b/277265947) log and flush transaction trace when we detect out of order updates
mDrawingState.releaseBufferListener = bufferData.releaseBufferListener;
mDrawingState.buffer = std::move(buffer);
- mDrawingState.clientCacheId = bufferData.cachedBuffer;
mDrawingState.acquireFence = bufferData.flags.test(BufferData::BufferDataChange::fenceChanged)
? bufferData.acquireFence
: Fence::NO_FENCE;
@@ -3095,15 +3114,11 @@
} else {
mCallbackHandleAcquireTimeOrFence = mDrawingState.acquireFenceTime->getSignalTime();
}
- mDrawingState.latchedVsyncId = info.vsyncId;
- mDrawingState.modified = true;
setTransactionFlags(eTransactionNeeded);
const int32_t layerId = getSequence();
mFlinger->mTimeStats->setPostTime(layerId, mDrawingState.frameNumber, getName().c_str(),
mOwnerUid, postTime, getGameMode());
- mDrawingState.desiredPresentTime = desiredPresentTime;
- mDrawingState.isAutoTimestamp = isAutoTimestamp;
if (mFlinger->mLegacyFrontEndEnabled) {
recordLayerHistoryBufferUpdate(getLayerProps());
@@ -3351,7 +3366,7 @@
const State& s(getDrawingState());
if (!s.buffer) {
- if (bgColorOnly) {
+ if (bgColorOnly || mBufferInfo.mBuffer) {
for (auto& handle : mDrawingState.callbackHandles) {
handle->latchTime = latchTime;
}
@@ -3398,12 +3413,19 @@
}
void Layer::gatherBufferInfo() {
- if (!mBufferInfo.mBuffer || !mDrawingState.buffer->hasSameBuffer(*mBufferInfo.mBuffer)) {
+ mPreviousReleaseCallbackId = {getCurrentBufferId(), mBufferInfo.mFrameNumber};
+ mPreviousReleaseBufferEndpoint = mBufferInfo.mReleaseBufferEndpoint;
+ if (!mDrawingState.buffer) {
+ mBufferInfo = {};
+ return;
+ }
+
+ if ((!mBufferInfo.mBuffer || !mDrawingState.buffer->hasSameBuffer(*mBufferInfo.mBuffer))) {
decrementPendingBufferCount();
}
- mPreviousReleaseCallbackId = {getCurrentBufferId(), mBufferInfo.mFrameNumber};
mBufferInfo.mBuffer = mDrawingState.buffer;
+ mBufferInfo.mReleaseBufferEndpoint = mDrawingState.releaseBufferEndpoint;
mBufferInfo.mFence = mDrawingState.acquireFence;
mBufferInfo.mFrameNumber = mDrawingState.frameNumber;
mBufferInfo.mPixelFormat =
@@ -3933,6 +3955,10 @@
mBufferInfo.mFrameLatencyNeeded = false;
}
+bool Layer::willReleaseBufferOnLatch() const {
+ return !mDrawingState.buffer && mBufferInfo.mBuffer;
+}
+
bool Layer::latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime) {
const bool bgColorOnly = mDrawingState.bgColorLayer != nullptr;
return latchBufferImpl(recomputeVisibleRegions, latchTime, bgColorOnly);
@@ -3956,9 +3982,6 @@
return false;
}
updateTexImage(latchTime, bgColorOnly);
- if (mDrawingState.buffer == nullptr) {
- return false;
- }
// Capture the old state of the layer for comparisons later
BufferInfo oldBufferInfo = mBufferInfo;
@@ -3967,6 +3990,18 @@
mCurrentFrameNumber = mDrawingState.frameNumber;
gatherBufferInfo();
+ if (mBufferInfo.mBuffer) {
+ // We latched a buffer that will be presented soon. Clear the previously presented layer
+ // stack list.
+ mPreviouslyPresentedLayerStacks.clear();
+ }
+
+ if (mDrawingState.buffer == nullptr) {
+ const bool bufferReleased = oldBufferInfo.mBuffer != nullptr;
+ recomputeVisibleRegions = bufferReleased;
+ return bufferReleased;
+ }
+
if (oldBufferInfo.mBuffer == nullptr) {
// the first time we receive a buffer, we need to trigger a
// geometry invalidation.