96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
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/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "LayerCreationArgs.h"
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#include <binder/IPCThreadState.h>
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#include <private/android_filesystem_config.h>
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#include "Client.h"
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#include "gui/LayerMetadata.h"
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namespace android::surfaceflinger {
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std::atomic<uint32_t> LayerCreationArgs::sSequence{1};
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std::atomic<uint32_t> LayerCreationArgs::sInternalSequence{1};
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uint32_t LayerCreationArgs::getInternalLayerId(uint32_t id) {
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return id | INTERNAL_LAYER_PREFIX;
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}
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LayerCreationArgs::LayerCreationArgs(SurfaceFlinger* flinger, sp<Client> client, std::string name,
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uint32_t flags, gui::LayerMetadata metadataArg,
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std::optional<uint32_t> id, bool internalLayer)
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: flinger(flinger),
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client(std::move(client)),
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name(std::move(name)),
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flags(flags),
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metadata(std::move(metadataArg)) {
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IPCThreadState* ipc = IPCThreadState::self();
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ownerPid = ipc->getCallingPid();
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uid_t callingUid = ipc->getCallingUid();
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metadata.setInt32(gui::METADATA_CALLING_UID, static_cast<int32_t>(callingUid));
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ownerUid = callingUid;
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if (ownerUid == AID_GRAPHICS || ownerUid == AID_SYSTEM) {
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// System can override the calling UID/PID since it can create layers on behalf of apps.
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ownerPid = metadata.getInt32(gui::METADATA_OWNER_PID, ownerPid);
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ownerUid = static_cast<uid_t>(
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metadata.getInt32(gui::METADATA_OWNER_UID, static_cast<int32_t>(ownerUid)));
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}
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if (internalLayer) {
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sequence = id.value_or(getInternalLayerId(sInternalSequence++));
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} else if (id) {
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sequence = *id;
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sSequence = *id + 1;
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} else {
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sequence = sSequence++;
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if (sequence >= INTERNAL_LAYER_PREFIX) {
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sSequence = 1;
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ALOGW("Layer sequence id rolled over.");
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sequence = sSequence++;
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}
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}
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}
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LayerCreationArgs::LayerCreationArgs(std::optional<uint32_t> id, bool internalLayer)
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: LayerCreationArgs(nullptr, nullptr, /*name=*/"", /*flags=*/0, /*metadata=*/{}, id,
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internalLayer) {}
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LayerCreationArgs LayerCreationArgs::fromOtherArgs(const LayerCreationArgs& other) {
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// returns a new instance of LayerCreationArgs with a unique id.
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return LayerCreationArgs(other.flinger, other.client, other.name, other.flags, other.metadata);
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}
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std::string LayerCreationArgs::getDebugString() const {
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std::stringstream stream;
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stream << "LayerCreationArgs{" << name << "[" << sequence << "] flags=" << flags
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<< " pid=" << ownerPid << " uid=" << ownerUid;
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if (addToRoot) {
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stream << " addToRoot=" << addToRoot;
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}
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if (parentId != UNASSIGNED_LAYER_ID) {
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stream << " parentId=" << parentId;
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}
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if (layerIdToMirror != UNASSIGNED_LAYER_ID) {
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stream << " layerIdToMirror=" << layerIdToMirror;
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}
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if (layerStackToMirror != ui::INVALID_LAYER_STACK) {
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stream << " layerStackToMirror=" << layerStackToMirror.id;
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}
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return stream.str();
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}
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} // namespace android::surfaceflinger
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