You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.7 KiB
61 lines
1.7 KiB
/*
|
|
* 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 <android-base/file.h>
|
|
#include <android-base/strings.h>
|
|
|
|
#include <fstream>
|
|
|
|
#include "AdaptiveBacklight.h"
|
|
|
|
using android::base::ReadFileToString;
|
|
using android::base::Trim;
|
|
using android::base::WriteStringToFile;
|
|
|
|
namespace vendor {
|
|
namespace lineage {
|
|
namespace livedisplay {
|
|
namespace V2_0 {
|
|
namespace samsung {
|
|
|
|
static constexpr const char* kBacklightPath = "/sys/class/lcd/panel/alpm";
|
|
|
|
bool AdaptiveBacklight::isSupported() {
|
|
std::fstream backlight(kBacklightPath, backlight.in | backlight.out);
|
|
return backlight.good();
|
|
}
|
|
|
|
// Methods from ::vendor::lineage::livedisplay::V2_0::IAdaptiveBacklight follow.
|
|
Return<bool> AdaptiveBacklight::isEnabled() {
|
|
std::string tmp;
|
|
int32_t contents = 0;
|
|
|
|
if (ReadFileToString(kBacklightPath, &tmp)) {
|
|
contents = std::stoi(Trim(tmp));
|
|
}
|
|
|
|
return contents > 0;
|
|
}
|
|
|
|
Return<bool> AdaptiveBacklight::setEnabled(bool enabled) {
|
|
return WriteStringToFile(enabled ? "2" : "0", kBacklightPath, true);
|
|
}
|
|
|
|
} // namespace samsung
|
|
} // namespace V2_0
|
|
} // namespace livedisplay
|
|
} // namespace lineage
|
|
} // namespace vendor
|
|
|