universal7885: import light HAL from hardware/samsung

* Added .clang-format symlink
* Undefine non-existent nodes in header file

Signed-off-by: roynatech2544 <whiteshell2544@naver.com>

universal7885-common/light/Light.cpp

@@ -0,0 +1,212 @@
+/*
+ * 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.
+ */
+#define LOG_TAG "android.hardware.light@2.0-service.eureka"
+
+#include <android-base/stringprintf.h>
+#include <log/log.h>
+#include <iomanip>
+#include <sys/stat.h>
+
+#include "Light.h"
+
+#define COLOR_MASK 0x00ffffff
+#define MAX_INPUT_BRIGHTNESS 255
+
+using android::hardware::light::V2_0::LightState;
+using android::hardware::light::V2_0::Status;
+using android::hardware::light::V2_0::Type;
+
+namespace android {
+namespace hardware {
+namespace light {
+namespace V2_0 {
+namespace implementation {
+
+/*
+ * Write value to path and close file.
+ */
+template <typename T>
+static void set(const std::string& path, const T& value) {
+    std::ofstream file(path);
+    file << value << std::endl;
+}
+
+template <typename T>
+static T get(const std::string& path, const T& def) {
+    std::ifstream file(path);
+    T result;
+
+    file >> result;
+    return file.fail() ? def : result;
+}
+
+template <typename T>
+static T exist(const std::string& path) {
+     struct stat buffer;   
+     return (stat (name.c_str(), &buffer) == 0); 
+}
+
+Light::Light() {
+    mLights.emplace(Type::BACKLIGHT,
+                    std::bind(&Light::handleBacklight, this, std::placeholders::_1));
+#ifdef BUTTON_BRIGHTNESS_NODE
+    mLights.emplace(Type::BUTTONS, std::bind(&Light::handleButtons, this, std::placeholders::_1));
+#endif /* BUTTON_BRIGHTNESS_NODE */
+#ifdef LED_BLINK_NODE
+    mLights.emplace(Type::BATTERY, std::bind(&Light::handleBattery, this, std::placeholders::_1));
+    mLights.emplace(Type::NOTIFICATIONS,
+                    std::bind(&Light::handleNotifications, this, std::placeholders::_1));
+    mLights.emplace(Type::ATTENTION,
+                    std::bind(&Light::handleAttention, this, std::placeholders::_1));
+#endif /* LED_BLINK_NODE */
+}
+
+Return<Status> Light::setLight(Type type, const LightState& state) {
+    auto it = mLights.find(type);
+
+    if (it == mLights.end()) {
+        return Status::LIGHT_NOT_SUPPORTED;
+    }
+
+    /*
+     * Lock global mutex until light state is updated.
+     */
+    std::lock_guard<std::mutex> lock(mLock);
+
+    it->second(state);
+
+    return Status::SUCCESS;
+}
+
+void Light::handleBacklight(const LightState& state) {
+    uint32_t max_brightness = get(PANEL_MAX_BRIGHTNESS_NODE, MAX_INPUT_BRIGHTNESS);
+    uint32_t brightness = rgbToBrightness(state);
+
+    if (max_brightness != MAX_INPUT_BRIGHTNESS) {
+        brightness = brightness * max_brightness / MAX_INPUT_BRIGHTNESS;
+    }
+    set(PANEL_BRIGHTNESS_NODE, brightness);
+}
+
+#ifdef BUTTON_BRIGHTNESS_NODE
+void Light::handleButtons(const LightState& state) {
+#ifdef VAR_BUTTON_BRIGHTNESS
+    uint32_t brightness = rgbToBrightness(state);
+#else
+    uint32_t brightness = (state.color & COLOR_MASK) ? 1 : 0;
+#endif
+
+    set(BUTTON_BRIGHTNESS_NODE, brightness);
+}
+#endif
+
+#ifdef LED_BLINK_NODE
+void Light::handleBattery(const LightState& state) {
+    mBatteryState = state;
+    setNotificationLED();
+}
+
+void Light::handleNotifications(const LightState& state) {
+    mNotificationState = state;
+    setNotificationLED();
+}
+
+void Light::handleAttention(const LightState& state) {
+    mAttentionState = state;
+    setNotificationLED();
+}
+
+void Light::setNotificationLED() {
+    int32_t adjusted_brightness = MAX_INPUT_BRIGHTNESS;
+    LightState state;
+#ifdef LED_BLN_NODE
+    bool bln = false;
+#endif /* LED_BLN_NODE */
+
+    if (mNotificationState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_NOTIFICATION;
+        state = mNotificationState;
+#ifdef LED_BLN_NODE
+        bln = true;
+#endif /* LED_BLN_NODE */
+    } else if (mAttentionState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_ATTENTION;
+        state = mAttentionState;
+        if (state.flashMode == Flash::HARDWARE) {
+            if (state.flashOnMs > 0 && state.flashOffMs == 0) state.flashMode = Flash::NONE;
+            state.color = 0x000000ff;
+        }
+        if (state.flashMode == Flash::NONE) {
+            state.color = 0;
+        }
+    } else if (mBatteryState.color & COLOR_MASK) {
+        adjusted_brightness = LED_BRIGHTNESS_BATTERY;
+        state = mBatteryState;
+    } else {
+        set(LED_BLINK_NODE, "0x00000000 0 0");
+        return;
+    }
+
+    if (state.flashMode == Flash::NONE) {
+        state.flashOnMs = 0;
+        state.flashOffMs = 0;
+    }
+
+    state.color = calibrateColor(state.color & COLOR_MASK, adjusted_brightness);
+    set(LED_BLINK_NODE, android::base::StringPrintf("0x%08x %d %d", state.color, state.flashOnMs,
+                                                    state.flashOffMs));
+
+#ifdef LED_BLN_NODE
+    if (bln) {
+        set(LED_BLN_NODE, (state.color & COLOR_MASK) ? 1 : 0);
+    }
+#endif /* LED_BLN_NODE */
+}
+
+uint32_t Light::calibrateColor(uint32_t color, int32_t brightness) {
+    uint32_t red = ((color >> 16) & 0xFF) * LED_ADJUSTMENT_R;
+    uint32_t green = ((color >> 8) & 0xFF) * LED_ADJUSTMENT_G;
+    uint32_t blue = (color & 0xFF) * LED_ADJUSTMENT_B;
+
+    return (((red * brightness) / 255) << 16) + (((green * brightness) / 255) << 8) +
+           ((blue * brightness) / 255);
+}
+#endif /* LED_BLINK_NODE */
+
+Return<void> Light::getSupportedTypes(getSupportedTypes_cb _hidl_cb) {
+    std::vector<Type> types;
+
+    for (auto const& light : mLights) {
+        types.push_back(light.first);
+    }
+
+    _hidl_cb(types);
+
+    return Void();
+}
+
+uint32_t Light::rgbToBrightness(const LightState& state) {
+    uint32_t color = state.color & COLOR_MASK;
+
+    return ((77 * ((color >> 16) & 0xff)) + (150 * ((color >> 8) & 0xff)) + (29 * (color & 0xff))) >>
+           8;
+}
+
+}  // namespace implementation
+}  // namespace V2_0
+}  // namespace light
+}  // namespace hardware
+}  // namespace android