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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.
*/
#include "Device.h"
#include <android-base/file.h>
#include <android-base/properties.h>
#include <json/json.h>
#include "ClientFrameComposer.h"
#include "FrameComposer.h"
#include "GuestFrameComposer.h"
#include "HostFrameComposer.h"
#include "NoOpFrameComposer.h"
ANDROID_SINGLETON_STATIC_INSTANCE(
aidl::android::hardware::graphics::composer3::impl::Device);
namespace aidl::android::hardware::graphics::composer3::impl {
namespace {
bool shouldUseGuestComposer() {
return ::android::base::GetProperty("ro.hardware.vulkan", "") == "pastel";
}
std::string getPmemPath() {
return ::android::base::GetProperty("ro.vendor.hwcomposer.pmem", "");
}
HWC3::Error loadPersistentKeyValues(Json::Value* dictionary) {
*dictionary = Json::Value(Json::ValueType::objectValue);
const std::string path = getPmemPath();
if (path.empty()) {
ALOGE("%s: persistent key-value store path not available.", __FUNCTION__);
return HWC3::Error::NoResources;
}
std::string content;
if (!::android::base::ReadFileToString(path, &content)) {
ALOGE("%s: failed to read key-value store from %s", __FUNCTION__,
path.c_str());
return HWC3::Error::NoResources;
}
if (content.empty() || content[0] == '\0') {
return HWC3::Error::None;
}
Json::Reader reader;
if (!reader.parse(content, *dictionary)) {
const std::string error = reader.getFormattedErrorMessages();
ALOGE("%s: failed to parse key-value store from %s:%s", __FUNCTION__,
path.c_str(), error.c_str());
return HWC3::Error::NoResources;
}
return HWC3::Error::None;
}
HWC3::Error savePersistentKeyValues(const Json::Value& dictionary) {
const std::string path = getPmemPath();
if (path.empty()) {
ALOGE("%s: persistent key-value store path not available.", __FUNCTION__);
return HWC3::Error::NoResources;
}
const std::string contents = dictionary.toStyledString();
if (!::android::base::WriteStringToFile(contents, path)) {
ALOGE("%s: failed to write key-value store to %s", __FUNCTION__,
path.c_str());
return HWC3::Error::NoResources;
}
return HWC3::Error::None;
}
} // namespace
HWC3::Error Device::getComposer(FrameComposer** outComposer) {
std::unique_lock<std::mutex> lock(mMutex);
if (mComposer == nullptr) {
if (IsNoOpMode()) {
DEBUG_LOG("%s: using NoOpFrameComposer", __FUNCTION__);
mComposer = std::make_unique<NoOpFrameComposer>();
} else if (IsClientCompositionMode()) {
DEBUG_LOG("%s: using ClientFrameComposer", __FUNCTION__);
mComposer = std::make_unique<ClientFrameComposer>();
} else if (shouldUseGuestComposer()) {
DEBUG_LOG("%s: using GuestFrameComposer", __FUNCTION__);
mComposer = std::make_unique<GuestFrameComposer>();
} else {
DEBUG_LOG("%s: using HostFrameComposer", __FUNCTION__);
mComposer = std::make_unique<HostFrameComposer>();
}
if (!mComposer) {
ALOGE("%s failed to allocate FrameComposer", __FUNCTION__);
return HWC3::Error::NoResources;
}
HWC3::Error error = mComposer->init();
if (error != HWC3::Error::None) {
ALOGE("%s failed to init FrameComposer", __FUNCTION__);
return error;
}
}
*outComposer = mComposer.get();
return HWC3::Error::None;
}
HWC3::Error Device::getPersistentKeyValue(const std::string& key,
const std::string& defaultValue,
std::string* outValue) {
std::unique_lock<std::mutex> lock(mMutex);
Json::Value dictionary;
HWC3::Error error = loadPersistentKeyValues(&dictionary);
if (error != HWC3::Error::None) {
ALOGE("%s: failed to load pmem json", __FUNCTION__);
return error;
}
if (!dictionary.isMember(key)) {
*outValue = defaultValue;
return HWC3::Error::None;
}
*outValue = defaultValue;
return HWC3::Error::None;
}
HWC3::Error Device::setPersistentKeyValue(const std::string& key,
const std::string& value) {
std::unique_lock<std::mutex> lock(mMutex);
Json::Value dictionary;
HWC3::Error error = loadPersistentKeyValues(&dictionary);
if (error != HWC3::Error::None) {
ALOGE("%s: failed to load pmem json", __FUNCTION__);
return error;
}
dictionary[key] = value;
error = savePersistentKeyValues(dictionary);
if (error != HWC3::Error::None) {
ALOGE("%s: failed to save pmem json", __FUNCTION__);
return error;
}
return HWC3::Error::None;
}
} // namespace aidl::android::hardware::graphics::composer3::impl
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