56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
/*
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* Copyright (C) 2022-2024 The LineageOS Project
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "BacklightDevice.h"
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#define LOG_TAG "BacklightDevice"
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#include <android-base/logging.h>
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#include <fstream>
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#include "Utils.h"
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace light {
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static const std::string kBacklightBasePath = "/sys/class/backlight/";
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static const uint32_t kDefaultMaxBrightness = 255;
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static const std::string kBrightnessNode = "brightness";
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static const std::string kMaxBrightnessNode = "max_brightness";
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BacklightDevice::BacklightDevice(std::string name)
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: mName(name), mBasePath(kBacklightBasePath + name + "/") {
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if (!readFromFile(mBasePath + kMaxBrightnessNode, mMaxBrightness)) {
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mMaxBrightness = kDefaultMaxBrightness;
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}
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};
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std::string BacklightDevice::getName() const {
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return mName;
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}
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bool BacklightDevice::exists() const {
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return std::ifstream(mBasePath + kBrightnessNode).good();
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}
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bool BacklightDevice::setBrightness(uint8_t value) {
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return writeToFile(mBasePath + kBrightnessNode, scaleBrightness(value, mMaxBrightness));
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}
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void BacklightDevice::dump(int fd) const {
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dprintf(fd, "Name: %s", mName.c_str());
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dprintf(fd, ", exists: %d", exists());
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dprintf(fd, ", base path: %s", mBasePath.c_str());
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dprintf(fd, ", max brightness: %u", mMaxBrightness);
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}
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} // namespace light
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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