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/*
* Copyright (C) 2019 The LineageOS 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 "AdaptiveBacklight.h"
#include <android-base/file.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <fstream>
using android::base::GetBoolProperty;
using android::base::ReadFileToString;
using android::base::Trim;
using android::base::WriteStringToFile;
namespace vendor {
namespace lineage {
namespace livedisplay {
namespace V2_0 {
namespace sysfs {
bool AdaptiveBacklight::isSupported() {
if (GetBoolProperty(FOSS_PROPERTY, false)) {
return false;
}
std::fstream acl(FILE_ACL, acl.in | acl.out);
std::fstream cabc(FILE_CABC, cabc.in | cabc.out);
if (acl.good()) {
mFile = FILE_ACL;
} else if (cabc.good()) {
mFile = FILE_CABC;
}
return !mFile.empty();
}
// Methods from ::vendor::lineage::livedisplay::V2_0::IAdaptiveBacklight follow.
Return<bool> AdaptiveBacklight::isEnabled() {
std::string tmp;
int32_t contents = 0;
if (ReadFileToString(mFile, &tmp)) {
contents = std::stoi(Trim(tmp));
}
return contents > 0;
}
Return<bool> AdaptiveBacklight::setEnabled(bool enabled) {
return WriteStringToFile(enabled ? "1" : "0", mFile, true);
}
} // namespace sysfs
} // namespace V2_0
} // namespace livedisplay
} // namespace lineage
} // namespace vendor
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