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/*
* Copyright (C) 2022 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.
*/
#undef LOG_TAG
#define LOG_TAG "LayerTraceGenerator"
//#define LOG_NDEBUG 0
#include <Tracing/TransactionProtoParser.h>
#include <gui/LayerState.h>
#include <log/log.h>
#include <renderengine/ExternalTexture.h>
#include <utils/String16.h>
#include <filesystem>
#include <fstream>
#include <ios>
#include <string>
#include <vector>
#include "FrontEnd/LayerCreationArgs.h"
#include "FrontEnd/RequestedLayerState.h"
#include "LayerProtoHelper.h"
#include "Tracing/LayerTracing.h"
#include "TransactionState.h"
#include "cutils/properties.h"
#include "LayerTraceGenerator.h"
namespace android {
using namespace ftl::flag_operators;
namespace {
class ScopedTraceDisabler {
public:
ScopedTraceDisabler() { TransactionTraceWriter::getInstance().disable(); }
~ScopedTraceDisabler() { TransactionTraceWriter::getInstance().enable(); }
};
} // namespace
bool LayerTraceGenerator::generate(const perfetto::protos::TransactionTraceFile& traceFile,
std::uint32_t traceFlags, LayerTracing& layerTracing,
bool onlyLastEntry) {
// We are generating the layers trace by replaying back a set of transactions. If the
// transactions have unexpected states, we may generate a transaction trace to debug
// the unexpected state. This is silly. So we disable it by poking the
// TransactionTraceWriter. This is really a hack since we should manage our depenecies a
// little better.
ScopedTraceDisabler fatalErrorTraceDisabler;
if (traceFile.entry_size() == 0) {
ALOGD("Trace file is empty");
return false;
}
TransactionProtoParser parser(std::make_unique<TransactionProtoParser::FlingerDataMapper>());
// frontend
frontend::LayerLifecycleManager lifecycleManager;
frontend::LayerHierarchyBuilder hierarchyBuilder;
frontend::LayerSnapshotBuilder snapshotBuilder;
ui::DisplayMap<ui::LayerStack, frontend::DisplayInfo> displayInfos;
ShadowSettings globalShadowSettings{.ambientColor = {1, 1, 1, 1}};
char value[PROPERTY_VALUE_MAX];
property_get("ro.surface_flinger.supports_background_blur", value, "0");
bool supportsBlur = atoi(value);
ALOGD("Generating %d transactions...", traceFile.entry_size());
for (int i = 0; i < traceFile.entry_size(); i++) {
// parse proto
perfetto::protos::TransactionTraceEntry entry = traceFile.entry(i);
ALOGV(" Entry %04d/%04d for time=%" PRId64 " vsyncid=%" PRId64
" layers +%d -%d handles -%d transactions=%d",
i, traceFile.entry_size(), entry.elapsed_realtime_nanos(), entry.vsync_id(),
entry.added_layers_size(), entry.destroyed_layers_size(),
entry.destroyed_layer_handles_size(), entry.transactions_size());
std::vector<std::unique_ptr<frontend::RequestedLayerState>> addedLayers;
addedLayers.reserve((size_t)entry.added_layers_size());
for (int j = 0; j < entry.added_layers_size(); j++) {
LayerCreationArgs args;
parser.fromProto(entry.added_layers(j), args);
ALOGV(" %s", args.getDebugString().c_str());
addedLayers.emplace_back(std::make_unique<frontend::RequestedLayerState>(args));
}
std::vector<TransactionState> transactions;
transactions.reserve((size_t)entry.transactions_size());
for (int j = 0; j < entry.transactions_size(); j++) {
// apply transactions
TransactionState transaction = parser.fromProto(entry.transactions(j));
for (auto& resolvedComposerState : transaction.states) {
if (resolvedComposerState.state.what & layer_state_t::eInputInfoChanged) {
if (!resolvedComposerState.state.windowInfoHandle->getInfo()->inputConfig.test(
gui::WindowInfo::InputConfig::NO_INPUT_CHANNEL)) {
// create a fake token since the FE expects a valid token
resolvedComposerState.state.windowInfoHandle->editInfo()->token =
sp<BBinder>::make();
}
}
}
transactions.emplace_back(std::move(transaction));
}
for (int j = 0; j < entry.destroyed_layers_size(); j++) {
ALOGV(" destroyedHandles=%d", entry.destroyed_layers(j));
}
std::vector<std::pair<uint32_t, std::string>> destroyedHandles;
destroyedHandles.reserve((size_t)entry.destroyed_layer_handles_size());
for (int j = 0; j < entry.destroyed_layer_handles_size(); j++) {
ALOGV(" destroyedHandles=%d", entry.destroyed_layer_handles(j));
destroyedHandles.push_back({entry.destroyed_layer_handles(j), ""});
}
bool displayChanged = entry.displays_changed();
if (displayChanged) {
parser.fromProto(entry.displays(), displayInfos);
}
// apply updates
lifecycleManager.addLayers(std::move(addedLayers));
lifecycleManager.applyTransactions(transactions, /*ignoreUnknownHandles=*/true);
lifecycleManager.onHandlesDestroyed(destroyedHandles, /*ignoreUnknownHandles=*/true);
// update hierarchy
hierarchyBuilder.update(lifecycleManager);
// update snapshots
frontend::LayerSnapshotBuilder::Args args{.root = hierarchyBuilder.getHierarchy(),
.layerLifecycleManager = lifecycleManager,
.displays = displayInfos,
.displayChanges = displayChanged,
.globalShadowSettings = globalShadowSettings,
.supportsBlur = supportsBlur,
.forceFullDamage = false,
.supportedLayerGenericMetadata = {},
.genericLayerMetadataKeyMap = {}};
snapshotBuilder.update(args);
bool visibleRegionsDirty = lifecycleManager.getGlobalChanges().any(
frontend::RequestedLayerState::Changes::VisibleRegion |
frontend::RequestedLayerState::Changes::Hierarchy |
frontend::RequestedLayerState::Changes::Visibility);
ALOGV(" layers:%04zu snapshots:%04zu changes:%s", lifecycleManager.getLayers().size(),
snapshotBuilder.getSnapshots().size(),
lifecycleManager.getGlobalChanges().string().c_str());
lifecycleManager.commitChanges();
auto layersProto =
LayerProtoFromSnapshotGenerator(snapshotBuilder, displayInfos, {}, traceFlags)
.generate(hierarchyBuilder.getHierarchy());
auto displayProtos = LayerProtoHelper::writeDisplayInfoToProto(displayInfos);
if (!onlyLastEntry || (i == traceFile.entry_size() - 1)) {
perfetto::protos::LayersSnapshotProto snapshotProto{};
snapshotProto.set_vsync_id(entry.vsync_id());
snapshotProto.set_elapsed_realtime_nanos(entry.elapsed_realtime_nanos());
snapshotProto.set_where(visibleRegionsDirty ? "visibleRegionsDirty" : "bufferLatched");
*snapshotProto.mutable_layers() = std::move(layersProto);
if ((traceFlags & LayerTracing::TRACE_COMPOSITION) == 0) {
snapshotProto.set_excludes_composition_state(true);
}
*snapshotProto.mutable_displays() = std::move(displayProtos);
layerTracing.addProtoSnapshotToOstream(std::move(snapshotProto),
LayerTracing::Mode::MODE_GENERATED);
}
}
ALOGD("End of generating trace file");
return true;
}
} // namespace android
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