[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/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 7700aa4..eb5cc4f 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -898,7 +898,7 @@
}
void SurfaceComposerClient::Transaction::releaseBufferIfOverwriting(const layer_state_t& state) {
- if (!(state.what & layer_state_t::eBufferChanged)) {
+ if (!(state.what & layer_state_t::eBufferChanged) || !state.bufferData->hasBuffer()) {
return;
}
@@ -1642,28 +1642,25 @@
releaseBufferIfOverwriting(*s);
- if (buffer == nullptr) {
- s->what &= ~layer_state_t::eBufferChanged;
- s->bufferData = nullptr;
- return *this;
- }
-
std::shared_ptr<BufferData> bufferData = std::make_shared<BufferData>();
bufferData->buffer = buffer;
- uint64_t frameNumber = sc->resolveFrameNumber(optFrameNumber);
- bufferData->frameNumber = frameNumber;
- bufferData->producerId = producerId;
- bufferData->flags |= BufferData::BufferDataChange::frameNumberChanged;
- if (fence) {
- bufferData->acquireFence = *fence;
- bufferData->flags |= BufferData::BufferDataChange::fenceChanged;
+ if (buffer) {
+ uint64_t frameNumber = sc->resolveFrameNumber(optFrameNumber);
+ bufferData->frameNumber = frameNumber;
+ bufferData->producerId = producerId;
+ bufferData->flags |= BufferData::BufferDataChange::frameNumberChanged;
+ if (fence) {
+ bufferData->acquireFence = *fence;
+ bufferData->flags |= BufferData::BufferDataChange::fenceChanged;
+ }
+ bufferData->releaseBufferEndpoint =
+ IInterface::asBinder(TransactionCompletedListener::getIInstance());
+ setReleaseBufferCallback(bufferData.get(), callback);
}
- bufferData->releaseBufferEndpoint =
- IInterface::asBinder(TransactionCompletedListener::getIInstance());
+
if (mIsAutoTimestamp) {
mDesiredPresentTime = systemTime();
}
- setReleaseBufferCallback(bufferData.get(), callback);
s->what |= layer_state_t::eBufferChanged;
s->bufferData = std::move(bufferData);
registerSurfaceControlForCallback(sc);
@@ -1684,6 +1681,25 @@
return *this;
}
+SurfaceComposerClient::Transaction& SurfaceComposerClient::Transaction::unsetBuffer(
+ const sp<SurfaceControl>& sc) {
+ layer_state_t* s = getLayerState(sc);
+ if (!s) {
+ mStatus = BAD_INDEX;
+ return *this;
+ }
+
+ if (!(s->what & layer_state_t::eBufferChanged)) {
+ return *this;
+ }
+
+ releaseBufferIfOverwriting(*s);
+
+ s->what &= ~layer_state_t::eBufferChanged;
+ s->bufferData = nullptr;
+ return *this;
+}
+
void SurfaceComposerClient::Transaction::setReleaseBufferCallback(BufferData* bufferData,
ReleaseBufferCallback callback) {
if (!callback) {
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index d431b43..945b164 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -541,6 +541,7 @@
const std::optional<sp<Fence>>& fence = std::nullopt,
const std::optional<uint64_t>& frameNumber = std::nullopt,
uint32_t producerId = 0, ReleaseBufferCallback callback = nullptr);
+ Transaction& unsetBuffer(const sp<SurfaceControl>& sc);
std::shared_ptr<BufferData> getAndClearBuffer(const sp<SurfaceControl>& sc);
/**
diff --git a/libs/gui/include/gui/test/CallbackUtils.h b/libs/gui/include/gui/test/CallbackUtils.h
index 08785b4..1c900e9 100644
--- a/libs/gui/include/gui/test/CallbackUtils.h
+++ b/libs/gui/include/gui/test/CallbackUtils.h
@@ -51,6 +51,7 @@
enum Buffer {
NOT_ACQUIRED = 0,
ACQUIRED,
+ ACQUIRED_NULL,
};
enum PreviousBuffer {
@@ -133,17 +134,28 @@
: mBufferResult(bufferResult), mPreviousBufferResult(previousBufferResult) {}
void verifySurfaceControlStats(const SurfaceControlStats& surfaceControlStats,
- nsecs_t latchTime) const {
+ nsecs_t /* latchTime */) const {
const auto& [surfaceControl, latch, acquireTimeOrFence, presentFence,
previousReleaseFence, transformHint, frameEvents, ignore] =
- surfaceControlStats;
+ surfaceControlStats;
- ASSERT_TRUE(std::holds_alternative<nsecs_t>(acquireTimeOrFence));
- ASSERT_EQ(std::get<nsecs_t>(acquireTimeOrFence) > 0,
- mBufferResult == ExpectedResult::Buffer::ACQUIRED)
- << "bad acquire time";
- ASSERT_LE(std::get<nsecs_t>(acquireTimeOrFence), latchTime)
- << "acquire time should be <= latch time";
+ nsecs_t acquireTime = -1;
+ if (std::holds_alternative<nsecs_t>(acquireTimeOrFence)) {
+ acquireTime = std::get<nsecs_t>(acquireTimeOrFence);
+ } else {
+ auto fence = std::get<sp<Fence>>(acquireTimeOrFence);
+ if (fence) {
+ ASSERT_EQ(fence->wait(3000), NO_ERROR);
+ acquireTime = fence->getSignalTime();
+ }
+ }
+
+ if (mBufferResult == ExpectedResult::Buffer::ACQUIRED) {
+ ASSERT_GT(acquireTime, 0) << "acquire time should be valid";
+ } else {
+ ASSERT_LE(acquireTime, 0) << "acquire time should not be valid";
+ }
+ ASSERT_EQ(acquireTime > 0, mBufferResult == ExpectedResult::Buffer::ACQUIRED);
if (mPreviousBufferResult == ExpectedResult::PreviousBuffer::RELEASED) {
ASSERT_NE(previousReleaseFence, nullptr)