Introduce TransactionState.
Encapsulate all the data inside transaction that we need
to pass into SurfaceFlinger. This will remove some
duplicate parcelling logic and clean up the interface
into SF.
Flag: EXEMPT refactor
Bug: 385156191
Test: presubmit
Change-Id: Ia6fab8539e48900700524a127cbcbbebd9acaf7a
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 5ab31db..b5fa321 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -281,6 +281,7 @@
"SurfaceControl.cpp",
"SurfaceComposerClient.cpp",
"SyncFeatures.cpp",
+ "TransactionState.cpp",
"VsyncEventData.cpp",
"view/Surface.cpp",
"WindowInfosListenerReporter.cpp",
diff --git a/libs/gui/TransactionState.cpp b/libs/gui/TransactionState.cpp
new file mode 100644
index 0000000..9e09bc2
--- /dev/null
+++ b/libs/gui/TransactionState.cpp
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "TransactionState"
+#include <gui/LayerState.h>
+#include <gui/SurfaceComposerClient.h>
+#include <gui/TransactionState.h>
+#include <private/gui/ParcelUtils.h>
+#include <algorithm>
+
+namespace android {
+
+status_t TransactionState::writeToParcel(Parcel* parcel) const {
+ SAFE_PARCEL(parcel->writeUint64, mId);
+ SAFE_PARCEL(parcel->writeUint32, mFlags);
+ SAFE_PARCEL(parcel->writeInt64, mDesiredPresentTime);
+ SAFE_PARCEL(parcel->writeBool, mIsAutoTimestamp);
+ SAFE_PARCEL(parcel->writeParcelable, mFrameTimelineInfo);
+ SAFE_PARCEL(parcel->writeStrongBinder, mApplyToken);
+ SAFE_PARCEL(parcel->writeBool, mMayContainBuffer);
+ SAFE_PARCEL(parcel->writeBool, mLogCallPoints);
+
+ SAFE_PARCEL(parcel->writeUint32, static_cast<uint32_t>(mDisplayStates.size()));
+ for (auto const& displayState : mDisplayStates) {
+ displayState.write(*parcel);
+ }
+ SAFE_PARCEL(parcel->writeUint32, static_cast<uint32_t>(mComposerStates.size()));
+ for (auto const& composerState : mComposerStates) {
+ composerState.write(*parcel);
+ }
+
+ mInputWindowCommands.write(*parcel);
+ SAFE_PARCEL(parcel->writeUint32, static_cast<uint32_t>(mUncacheBuffers.size()));
+ for (const client_cache_t& uncacheBuffer : mUncacheBuffers) {
+ SAFE_PARCEL(parcel->writeStrongBinder, uncacheBuffer.token.promote());
+ SAFE_PARCEL(parcel->writeUint64, uncacheBuffer.id);
+ }
+
+ SAFE_PARCEL(parcel->writeUint32, static_cast<uint32_t>(mMergedTransactionIds.size()));
+ for (auto mergedTransactionId : mMergedTransactionIds) {
+ SAFE_PARCEL(parcel->writeUint64, mergedTransactionId);
+ }
+
+ SAFE_PARCEL(parcel->writeBool, mHasListenerCallbacks);
+ SAFE_PARCEL(parcel->writeUint32, static_cast<uint32_t>(mListenerCallbacks.size()));
+ for (const auto& [listener, callbackIds] : mListenerCallbacks) {
+ SAFE_PARCEL(parcel->writeStrongBinder, listener);
+ SAFE_PARCEL(parcel->writeParcelableVector, callbackIds);
+ }
+
+ return NO_ERROR;
+}
+
+status_t TransactionState::readFromParcel(const Parcel* parcel) {
+ SAFE_PARCEL(parcel->readUint64, &mId);
+ SAFE_PARCEL(parcel->readUint32, &mFlags);
+ SAFE_PARCEL(parcel->readInt64, &mDesiredPresentTime);
+ SAFE_PARCEL(parcel->readBool, &mIsAutoTimestamp);
+ SAFE_PARCEL(parcel->readParcelable, &mFrameTimelineInfo);
+ SAFE_PARCEL(parcel->readNullableStrongBinder, &mApplyToken);
+ SAFE_PARCEL(parcel->readBool, &mMayContainBuffer);
+ SAFE_PARCEL(parcel->readBool, &mLogCallPoints);
+
+ uint32_t count;
+ SAFE_PARCEL_READ_SIZE(parcel->readUint32, &count, parcel->dataSize())
+ mDisplayStates.clear();
+ mDisplayStates.reserve(count);
+ for (size_t i = 0; i < count; i++) {
+ DisplayState displayState;
+ if (displayState.read(*parcel) == BAD_VALUE) {
+ return BAD_VALUE;
+ }
+ mDisplayStates.emplace_back(std::move(displayState));
+ }
+
+ SAFE_PARCEL_READ_SIZE(parcel->readUint32, &count, parcel->dataSize())
+ mComposerStates.clear();
+ mComposerStates.reserve(count);
+ for (size_t i = 0; i < count; i++) {
+ ComposerState composerState;
+ if (composerState.read(*parcel) == BAD_VALUE) {
+ return BAD_VALUE;
+ }
+ mComposerStates.emplace_back(std::move(composerState));
+ }
+
+ if (status_t status = mInputWindowCommands.read(*parcel) != NO_ERROR) {
+ return status;
+ }
+
+ SAFE_PARCEL_READ_SIZE(parcel->readUint32, &count, parcel->dataSize())
+ mUncacheBuffers.clear();
+ mUncacheBuffers.reserve(count);
+ for (size_t i = 0; i < count; i++) {
+ client_cache_t client_cache;
+ sp<IBinder> tmpBinder;
+ SAFE_PARCEL(parcel->readStrongBinder, &tmpBinder);
+ client_cache.token = tmpBinder;
+ SAFE_PARCEL(parcel->readUint64, &client_cache.id);
+ mUncacheBuffers.emplace_back(std::move(client_cache));
+ }
+
+ SAFE_PARCEL_READ_SIZE(parcel->readUint32, &count, parcel->dataSize())
+ mMergedTransactionIds.clear();
+ mMergedTransactionIds.resize(count);
+ for (size_t i = 0; i < count; i++) {
+ SAFE_PARCEL(parcel->readUint64, &mMergedTransactionIds[i]);
+ }
+
+ SAFE_PARCEL(parcel->readBool, &mHasListenerCallbacks);
+ SAFE_PARCEL_READ_SIZE(parcel->readUint32, &count, parcel->dataSize());
+ mListenerCallbacks.clear();
+ mListenerCallbacks.reserve(count);
+ for (uint32_t i = 0; i < count; i++) {
+ sp<IBinder> tmpBinder;
+ SAFE_PARCEL(parcel->readStrongBinder, &tmpBinder);
+ std::vector<CallbackId> callbackIds;
+ SAFE_PARCEL(parcel->readParcelableVector, &callbackIds);
+ mListenerCallbacks.emplace_back(tmpBinder, callbackIds);
+ }
+
+ return NO_ERROR;
+}
+
+void TransactionState::merge(TransactionState&& other,
+ const std::function<void(layer_state_t&)>& onBufferOverwrite) {
+ while (mMergedTransactionIds.size() + other.mMergedTransactionIds.size() >
+ MAX_MERGE_HISTORY_LENGTH - 1 &&
+ mMergedTransactionIds.size() > 0) {
+ mMergedTransactionIds.pop_back();
+ }
+ if (other.mMergedTransactionIds.size() == MAX_MERGE_HISTORY_LENGTH) {
+ mMergedTransactionIds.insert(mMergedTransactionIds.begin(),
+ other.mMergedTransactionIds.begin(),
+ other.mMergedTransactionIds.end() - 1);
+ } else if (other.mMergedTransactionIds.size() > 0u) {
+ mMergedTransactionIds.insert(mMergedTransactionIds.begin(),
+ other.mMergedTransactionIds.begin(),
+ other.mMergedTransactionIds.end());
+ }
+ mMergedTransactionIds.insert(mMergedTransactionIds.begin(), other.mId);
+
+ for (auto const& otherState : other.mComposerStates) {
+ if (auto it = std::find_if(mComposerStates.begin(), mComposerStates.end(),
+ [&otherState](const auto& composerState) {
+ return composerState.state.surface ==
+ otherState.state.surface;
+ });
+ it != mComposerStates.end()) {
+ if (otherState.state.what & layer_state_t::eBufferChanged) {
+ onBufferOverwrite(it->state);
+ }
+ it->state.merge(otherState.state);
+ } else {
+ mComposerStates.push_back(otherState);
+ }
+ }
+
+ for (auto const& state : other.mDisplayStates) {
+ if (auto it = std::find_if(mDisplayStates.begin(), mDisplayStates.end(),
+ [&state](const auto& displayState) {
+ return displayState.token == state.token;
+ });
+ it != mDisplayStates.end()) {
+ it->merge(state);
+ } else {
+ mDisplayStates.push_back(state);
+ }
+ }
+
+ for (const auto& cacheId : other.mUncacheBuffers) {
+ mUncacheBuffers.push_back(cacheId);
+ }
+
+ mInputWindowCommands.merge(other.mInputWindowCommands);
+ // TODO(b/385156191) Consider merging desired present time.
+ mFlags |= other.mFlags;
+ mMayContainBuffer |= other.mMayContainBuffer;
+ mLogCallPoints |= other.mLogCallPoints;
+
+ // mApplyToken is explicitly not merged. Token should be set before applying the transactions to
+ // make synchronization decisions a bit simpler.
+ mergeFrameTimelineInfo(other.mFrameTimelineInfo);
+ other.clear();
+}
+
+// copied from FrameTimelineInfo::merge()
+void TransactionState::mergeFrameTimelineInfo(const FrameTimelineInfo& other) {
+ // When merging vsync Ids we take the oldest valid one
+ if (mFrameTimelineInfo.vsyncId != FrameTimelineInfo::INVALID_VSYNC_ID &&
+ other.vsyncId != FrameTimelineInfo::INVALID_VSYNC_ID) {
+ if (other.vsyncId > mFrameTimelineInfo.vsyncId) {
+ mFrameTimelineInfo = other;
+ }
+ } else if (mFrameTimelineInfo.vsyncId == FrameTimelineInfo::INVALID_VSYNC_ID) {
+ mFrameTimelineInfo = other;
+ }
+}
+
+void TransactionState::clear() {
+ mComposerStates.clear();
+ mDisplayStates.clear();
+ mListenerCallbacks.clear();
+ mHasListenerCallbacks = false;
+ mInputWindowCommands.clear();
+ mUncacheBuffers.clear();
+ mDesiredPresentTime = 0;
+ mIsAutoTimestamp = true;
+ mApplyToken = nullptr;
+ mFrameTimelineInfo = {};
+ mMergedTransactionIds.clear();
+ mFlags = 0;
+ mMayContainBuffer = false;
+ mLogCallPoints = false;
+}
+
+layer_state_t* TransactionState::getLayerState(const sp<SurfaceControl>& sc) {
+ auto handle = sc->getLayerStateHandle();
+ if (auto it = std::find_if(mComposerStates.begin(), mComposerStates.end(),
+ [&handle](const auto& composerState) {
+ return composerState.state.surface == handle;
+ });
+ it != mComposerStates.end()) {
+ return &it->state;
+ }
+
+ // we don't have it, add an initialized layer_state to our list
+ ComposerState s;
+ s.state.surface = handle;
+ s.state.layerId = sc->getLayerId();
+ mComposerStates.push_back(s);
+
+ return &mComposerStates.back().state;
+}
+
+DisplayState& TransactionState::getDisplayState(const sp<IBinder>& token) {
+ if (auto it = std::find_if(mDisplayStates.begin(), mDisplayStates.end(),
+ [token](const auto& display) { return display.token == token; });
+ it != mDisplayStates.end()) {
+ return *it;
+ }
+
+ // If display state doesn't exist, add a new one.
+ DisplayState s;
+ s.token = token;
+ mDisplayStates.push_back(s);
+ return mDisplayStates.back();
+}
+
+}; // namespace android
diff --git a/libs/gui/include/gui/TransactionState.h b/libs/gui/include/gui/TransactionState.h
new file mode 100644
index 0000000..4358227
--- /dev/null
+++ b/libs/gui/include/gui/TransactionState.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android/gui/FrameTimelineInfo.h>
+#include <binder/Parcelable.h>
+#include <gui/LayerState.h>
+
+namespace android {
+
+// Class to store all the transaction data and the parcelling logic
+class TransactionState {
+public:
+ explicit TransactionState() = default;
+ TransactionState(TransactionState const& other) = default;
+ status_t writeToParcel(Parcel* parcel) const;
+ status_t readFromParcel(const Parcel* parcel);
+ layer_state_t* getLayerState(const sp<SurfaceControl>& sc);
+ DisplayState& getDisplayState(const sp<IBinder>& token);
+
+ // Returns the current id of the transaction.
+ // The id is updated every time the transaction is applied.
+ uint64_t getId() const { return mId; }
+ std::vector<uint64_t> getMergedTransactionIds() const { return mMergedTransactionIds; }
+ void enableDebugLogCallPoints() { mLogCallPoints = true; }
+ void merge(TransactionState&& other,
+ const std::function<void(layer_state_t&)>& onBufferOverwrite);
+
+ // copied from FrameTimelineInfo::merge()
+ void mergeFrameTimelineInfo(const FrameTimelineInfo& other);
+ void clear();
+ bool operator==(const TransactionState& rhs) const = default;
+ bool operator!=(const TransactionState& rhs) const = default;
+
+ uint64_t mId = 0;
+ std::vector<uint64_t> mMergedTransactionIds;
+ uint32_t mFlags = 0;
+ // The vsync id provided by Choreographer.getVsyncId and the input event id
+ gui::FrameTimelineInfo mFrameTimelineInfo;
+ // mDesiredPresentTime is the time in nanoseconds that the client would like the transaction
+ // to be presented. When it is not possible to present at exactly that time, it will be
+ // presented after the time has passed.
+ //
+ // If the client didn't pass a desired presentation time, mDesiredPresentTime will be
+ // populated to the time setBuffer was called, and mIsAutoTimestamp will be set to true.
+ //
+ // Desired present times that are more than 1 second in the future may be ignored.
+ // When a desired present time has already passed, the transaction will be presented as soon
+ // as possible.
+ //
+ // Transactions from the same process are presented in the same order that they are applied.
+ // The desired present time does not affect this ordering.
+ int64_t mDesiredPresentTime = 0;
+ bool mIsAutoTimestamp = true;
+ // If not null, transactions will be queued up using this token otherwise a common token
+ // per process will be used.
+ sp<IBinder> mApplyToken;
+ // Indicates that the Transaction may contain buffers that should be cached. The reason this
+ // is only a guess is that buffers can be removed before cache is called. This is only a
+ // hint that at some point a buffer was added to this transaction before apply was called.
+ bool mMayContainBuffer = false;
+ // Prints debug logs when enabled.
+ bool mLogCallPoints = false;
+
+ std::vector<DisplayState> mDisplayStates;
+ std::vector<ComposerState> mComposerStates;
+ InputWindowCommands mInputWindowCommands;
+ std::vector<client_cache_t> mUncacheBuffers;
+ // Note: mHasListenerCallbacks can be true even if mListenerCallbacks is
+ // empty.
+ bool mHasListenerCallbacks = false;
+ std::vector<ListenerCallbacks> mListenerCallbacks;
+
+private:
+ // We keep track of the last MAX_MERGE_HISTORY_LENGTH merged transaction ids.
+ // Ordered most recently merged to least recently merged.
+ static constexpr size_t MAX_MERGE_HISTORY_LENGTH = 10u;
+};
+
+}; // namespace android
diff --git a/libs/gui/tests/Android.bp b/libs/gui/tests/Android.bp
index 87051a7..e20345d 100644
--- a/libs/gui/tests/Android.bp
+++ b/libs/gui/tests/Android.bp
@@ -90,6 +90,7 @@
"testserver/TestServerClient.cpp",
"testserver/TestServerHost.cpp",
"TextureRenderer.cpp",
+ "TransactionState_test.cpp",
"VsyncEventData_test.cpp",
"WindowInfo_test.cpp",
],
diff --git a/libs/gui/tests/TransactionState_test.cpp b/libs/gui/tests/TransactionState_test.cpp
new file mode 100644
index 0000000..179b264
--- /dev/null
+++ b/libs/gui/tests/TransactionState_test.cpp
@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gmock/gmock.h>
+
+#include <gtest/gtest.h>
+#include <unordered_map>
+#include "android/gui/FocusRequest.h"
+#include "binder/Binder.h"
+#include "binder/Parcel.h"
+#include "gtest/gtest.h"
+#include "gui/LayerState.h"
+#include "gui/WindowInfo.h"
+
+#include "gui/TransactionState.h"
+
+namespace android {
+
+void sprintf(std::string& out, const char* format, ...) {
+ va_list arg_list;
+ va_start(arg_list, format);
+
+ int len = vsnprintf(nullptr, 0, format, arg_list);
+ if (len < 0) {
+ va_end(arg_list);
+ }
+ std::string line(len, '\0');
+ int written = vsnprintf(line.data(), len + 1, format, arg_list);
+ if (written != len) {
+ va_end(arg_list);
+ }
+ line.pop_back();
+ out += line;
+ va_end(arg_list);
+}
+
+constexpr std::string dump_struct(auto& x) {
+ std::string s;
+#if __has_builtin(__builtin_dump_struct)
+ __builtin_dump_struct(&x, sprintf, s);
+#else
+ (void)x;
+#endif
+ return s;
+}
+
+void PrintTo(const TransactionState& state, ::std::ostream* os) {
+ *os << dump_struct(state);
+ *os << state.mFrameTimelineInfo.toString();
+ for (auto mergedId : state.mMergedTransactionIds) {
+ *os << mergedId << ",";
+ }
+}
+
+void PrintTo(const ComposerState& state, ::std::ostream* os) {
+ *os << dump_struct(state.state);
+ *os << state.state.getWindowInfo();
+}
+
+// In case EXPECT_EQ fails, this function is useful to pinpoint exactly which
+// field did not compare ==.
+void Compare(const TransactionState& s1, const TransactionState& s2) {
+ EXPECT_EQ(s1.mId, s2.mId);
+ EXPECT_EQ(s1.mMergedTransactionIds, s2.mMergedTransactionIds);
+ EXPECT_EQ(s1.mFlags, s2.mFlags);
+ EXPECT_EQ(s1.mFrameTimelineInfo, s2.mFrameTimelineInfo);
+ EXPECT_EQ(s1.mDesiredPresentTime, s2.mDesiredPresentTime);
+ EXPECT_EQ(s1.mIsAutoTimestamp, s2.mIsAutoTimestamp);
+ EXPECT_EQ(s1.mApplyToken, s2.mApplyToken);
+ EXPECT_EQ(s1.mMayContainBuffer, s2.mMayContainBuffer);
+ EXPECT_EQ(s1.mLogCallPoints, s2.mLogCallPoints);
+ EXPECT_EQ(s1.mDisplayStates.size(), s2.mDisplayStates.size());
+ EXPECT_THAT(s1.mDisplayStates, ::testing::ContainerEq(s2.mDisplayStates));
+ EXPECT_EQ(s1.mComposerStates.size(), s2.mComposerStates.size());
+ EXPECT_EQ(s1.mComposerStates, s2.mComposerStates);
+ EXPECT_EQ(s1.mInputWindowCommands, s2.mInputWindowCommands);
+ EXPECT_EQ(s1.mUncacheBuffers, s2.mUncacheBuffers);
+ EXPECT_EQ(s1.mHasListenerCallbacks, s2.mHasListenerCallbacks);
+ EXPECT_EQ(s1.mListenerCallbacks.size(), s2.mListenerCallbacks.size());
+ EXPECT_EQ(s1.mListenerCallbacks, s2.mListenerCallbacks);
+}
+
+std::unique_ptr<std::unordered_map<int, sp<BBinder>>> createTokenMap(size_t maxSize) {
+ auto result = std::make_unique<std::unordered_map<int, sp<BBinder>>>();
+ for (size_t i = 0; i < maxSize; ++i) {
+ result->emplace(i, sp<BBinder>::make());
+ }
+ return result;
+}
+
+constexpr size_t kMaxComposerStates = 2;
+ComposerState createComposerStateForTest(size_t i) {
+ static const auto* const sLayerHandle = createTokenMap(kMaxComposerStates).release();
+
+ ComposerState state;
+ state.state.what = layer_state_t::eFlagsChanged;
+ state.state.surface = sLayerHandle->at(i);
+ state.state.layerId = i;
+ state.state.flags = 20 * i;
+ return state;
+}
+
+constexpr size_t kMaxDisplayStates = 5;
+DisplayState createDisplayStateForTest(size_t i) {
+ static const auto* const sDisplayTokens = createTokenMap(kMaxDisplayStates).release();
+
+ DisplayState displayState;
+ displayState.what = DisplayState::eFlagsChanged;
+ displayState.token = sDisplayTokens->at(i);
+ displayState.flags = 20 * i;
+ return displayState;
+}
+
+TransactionState createTransactionStateForTest() {
+ static sp<BBinder> sApplyToken = sp<BBinder>::make();
+
+ TransactionState state;
+ state.mId = 123;
+ state.mMergedTransactionIds.push_back(15);
+ state.mMergedTransactionIds.push_back(0);
+ state.mFrameTimelineInfo.vsyncId = 14;
+ state.mDesiredPresentTime = 11;
+ state.mIsAutoTimestamp = true;
+ state.mApplyToken = sApplyToken;
+ for (size_t i = 0; i < kMaxDisplayStates; i++) {
+ state.mDisplayStates.push_back(createDisplayStateForTest(i));
+ }
+ for (size_t i = 0; i < kMaxComposerStates; i++) {
+ state.mComposerStates.push_back(createComposerStateForTest(i));
+ }
+ static const auto* const sFocusRequestTokens = createTokenMap(5).release();
+ for (int i = 0; i < 5; i++) {
+ gui::FocusRequest request;
+ request.token = sFocusRequestTokens->at(i);
+ request.timestamp = i;
+ state.mInputWindowCommands.addFocusRequest(request);
+ }
+ static const auto* const sCacheToken = createTokenMap(5).release();
+ for (int i = 0; i < 5; i++) {
+ client_cache_t cache;
+ cache.token = sCacheToken->at(i);
+ cache.id = i;
+ state.mUncacheBuffers.emplace_back(std::move(cache));
+ }
+ static const auto* const sListenerCallbacks = []() {
+ auto* callbacks = new std::vector<ListenerCallbacks>();
+ for (int i = 0; i < 5; i++) {
+ callbacks->emplace_back(sp<BBinder>::make(),
+ std::unordered_set<CallbackId, CallbackIdHash>{});
+ }
+ return callbacks;
+ }();
+ state.mHasListenerCallbacks = true;
+ state.mListenerCallbacks = *sListenerCallbacks;
+ return state;
+}
+
+TransactionState createEmptyTransaction(uint64_t id) {
+ TransactionState state;
+ state.mId = id;
+ return state;
+}
+
+TEST(TransactionStateTest, parcel) {
+ TransactionState state = createTransactionStateForTest();
+ Parcel p;
+ state.writeToParcel(&p);
+ p.setDataPosition(0);
+ TransactionState parcelledState;
+ parcelledState.readFromParcel(&p);
+ EXPECT_EQ(state, parcelledState);
+};
+
+TEST(TransactionStateTest, parcelDisplayState) {
+ DisplayState state = createDisplayStateForTest(0);
+ Parcel p;
+ state.write(p);
+ p.setDataPosition(0);
+ DisplayState parcelledState;
+ parcelledState.read(p);
+ EXPECT_EQ(state, parcelledState);
+};
+
+TEST(TransactionStateTest, parcelLayerState) {
+ ComposerState state = createComposerStateForTest(0);
+ Parcel p;
+ state.write(p);
+ p.setDataPosition(0);
+ ComposerState parcelledState;
+ parcelledState.read(p);
+ EXPECT_EQ(state, parcelledState);
+};
+
+TEST(TransactionStateTest, parcelEmptyState) {
+ TransactionState state;
+ Parcel p;
+ state.writeToParcel(&p);
+ p.setDataPosition(0);
+ TransactionState parcelledState;
+ state.readFromParcel(&p);
+ EXPECT_EQ(state, parcelledState);
+};
+
+TEST(TransactionStateTest, mergeLayerState) {
+ ComposerState composerState = createComposerStateForTest(0);
+ ComposerState update;
+ update.state.surface = composerState.state.surface;
+ update.state.layerId = 0;
+ update.state.what = layer_state_t::eAlphaChanged;
+ update.state.color.a = .42;
+ composerState.state.merge(update.state);
+
+ ComposerState expectedMergedState = createComposerStateForTest(0);
+ expectedMergedState.state.what |= layer_state_t::eAlphaChanged;
+ expectedMergedState.state.color.a = .42;
+ EXPECT_EQ(composerState, expectedMergedState);
+};
+
+TEST(TransactionStateTest, merge) {
+ // Setup.
+ static constexpr uint64_t kUpdateTransactionId = 200;
+
+ TransactionState state = createTransactionStateForTest();
+
+ TransactionState update;
+ update.mId = kUpdateTransactionId;
+ {
+ ComposerState composerState;
+ composerState.state.surface = state.mComposerStates[0].state.surface;
+ composerState.state.what = layer_state_t::eAlphaChanged;
+ composerState.state.color.a = .42;
+ update.mComposerStates.push_back(composerState);
+ }
+ {
+ ComposerState composerState;
+ composerState.state.surface = state.mComposerStates[1].state.surface;
+ composerState.state.what = layer_state_t::eBufferChanged;
+ update.mComposerStates.push_back(composerState);
+ }
+ int32_t overrwiteLayerId = -1;
+ // Mutation.
+ state.merge(std::move(update),
+ [&overrwiteLayerId](layer_state_t ls) { overrwiteLayerId = ls.layerId; });
+ // Assertions.
+ EXPECT_EQ(1, overrwiteLayerId);
+ EXPECT_EQ(update, createEmptyTransaction(update.getId()));
+
+ TransactionState expectedMergedState = createTransactionStateForTest();
+ expectedMergedState.mMergedTransactionIds
+ .insert(expectedMergedState.mMergedTransactionIds.begin(), kUpdateTransactionId);
+ expectedMergedState.mComposerStates.at(0).state.what |= layer_state_t::eAlphaChanged;
+ expectedMergedState.mComposerStates.at(0).state.color.a = .42;
+ expectedMergedState.mComposerStates.at(1).state.what |= layer_state_t::eBufferChanged;
+ auto inputCommands = expectedMergedState.mInputWindowCommands;
+
+ // desired present time is not merged.
+ expectedMergedState.mDesiredPresentTime = state.mDesiredPresentTime;
+
+ EXPECT_EQ(state.mComposerStates[0], expectedMergedState.mComposerStates[0]);
+ EXPECT_EQ(state.mInputWindowCommands, expectedMergedState.mInputWindowCommands);
+ EXPECT_EQ(state, expectedMergedState);
+};
+
+TEST(TransactionStateTest, clear) {
+ TransactionState state = createTransactionStateForTest();
+ state.clear();
+ TransactionState emptyState = createEmptyTransaction(state.getId());
+ EXPECT_EQ(state, emptyState);
+};
+
+} // namespace android