| /* |
| * 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 (IsInNoOpCompositionMode()) { |
| DEBUG_LOG("%s: using NoOpFrameComposer", __FUNCTION__); |
| mComposer = std::make_unique<NoOpFrameComposer>(); |
| } else if (IsInClientCompositionMode()) { |
| 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 |