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fix: 首次提交

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xiaoyan159@6800H
2024-12-09 11:25:23 +08:00
parent d0c01071e9
commit 2c2109a5f3
4741 changed files with 290641 additions and 0 deletions
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20
SettingsLib/DisplayUtils/Android.bp Normal file
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package {
// See: http://go/android-license-faq
// A large-scale-change added 'default_applicable_licenses' to import
// all of the 'license_kinds' from "frameworks_base_license"
// to get the below license kinds:
// SPDX-license-identifier-Apache-2.0
default_applicable_licenses: ["frameworks_base_license"],
}
android_library {
name: "SettingsLibDisplayUtils",
use_resource_processor: true,
defaults: [
"SettingsLintDefaults",
],
srcs: ["src/**/*.java"],
min_sdk_version: "21",
}

21
SettingsLib/DisplayUtils/AndroidManifest.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (C) 2019 The Android Open Source 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.
-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.settingslib.display">
</manifest>

142
SettingsLib/DisplayUtils/src/com/android/settingslib/display/BrightnessUtils.java Normal file
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/*
* Copyright (C) 2018 The Android Open Source 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.
*/
package com.android.settingslib.display;
import android.util.MathUtils;
/** Utility methods for calculating the display brightness. */
public class BrightnessUtils {
public static final int GAMMA_SPACE_MIN = 0;
public static final int GAMMA_SPACE_MAX = 65535;
// Hybrid Log Gamma constant values
private static final float R = 0.5f;
private static final float A = 0.17883277f;
private static final float B = 0.28466892f;
private static final float C = 0.55991073f;
/**
* A function for converting from the gamma space that the slider works in to the
* linear space that the setting works in.
*
* The gamma space effectively provides us a way to make linear changes to the slider that
* result in linear changes in perception. If we made changes to the slider in the linear space
* then we'd see an approximately logarithmic change in perception (c.f. Fechner's Law).
*
* Internally, this implements the Hybrid Log Gamma electro-optical transfer function, which is
* a slight improvement to the typical gamma transfer function for displays whose max
* brightness exceeds the 120 nit reference point, but doesn't set a specific reference
* brightness like the PQ function does.
*
* Note that this transfer function is only valid if the display's backlight value is a linear
* control. If it's calibrated to be something non-linear, then a different transfer function
* should be used.
*
* @param val The slider value.
* @param min The minimum acceptable value for the setting.
* @param max The maximum acceptable value for the setting.
* @return The corresponding setting value.
*/
public static final int convertGammaToLinear(int val, int min, int max) {
final float normalizedVal = MathUtils.norm(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, val);
final float ret;
if (normalizedVal <= R) {
ret = MathUtils.sq(normalizedVal / R);
} else {
ret = MathUtils.exp((normalizedVal - C) / A) + B;
}
// HLG is normalized to the range [0, 12], so we need to re-normalize to the range [0, 1]
// in order to derive the correct setting value.
return Math.round(MathUtils.lerp(min, max, ret / 12));
}
/**
* Version of {@link #convertGammaToLinear} that takes and returns float values.
* TODO(flc): refactor Android Auto to use float version
*
* @param val The slider value.
* @param min The minimum acceptable value for the setting.
* @param max The maximum acceptable value for the setting.
* @return The corresponding setting value.
*/
public static final float convertGammaToLinearFloat(int val, float min, float max) {
final float normalizedVal = MathUtils.norm(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, val);
final float ret;
if (normalizedVal <= R) {
ret = MathUtils.sq(normalizedVal / R);
} else {
ret = MathUtils.exp((normalizedVal - C) / A) + B;
}
// HLG is normalized to the range [0, 12], ensure that value is within that range,
// it shouldn't be out of bounds.
final float normalizedRet = MathUtils.constrain(ret, 0, 12);
// Re-normalize to the range [0, 1]
// in order to derive the correct setting value.
return MathUtils.lerp(min, max, normalizedRet / 12);
}
/**
* A function for converting from the linear space that the setting works in to the
* gamma space that the slider works in.
*
* The gamma space effectively provides us a way to make linear changes to the slider that
* result in linear changes in perception. If we made changes to the slider in the linear space
* then we'd see an approximately logarithmic change in perception (c.f. Fechner's Law).
*
* Internally, this implements the Hybrid Log Gamma opto-electronic transfer function, which is
* a slight improvement to the typical gamma transfer function for displays whose max
* brightness exceeds the 120 nit reference point, but doesn't set a specific reference
* brightness like the PQ function does.
*
* Note that this transfer function is only valid if the display's backlight value is a linear
* control. If it's calibrated to be something non-linear, then a different transfer function
* should be used.
*
* @param val The brightness setting value.
* @param min The minimum acceptable value for the setting.
* @param max The maximum acceptable value for the setting.
* @return The corresponding slider value
*/
public static final int convertLinearToGamma(int val, int min, int max) {
return convertLinearToGammaFloat((float) val, (float) min, (float) max);
}
/**
* Version of {@link #convertLinearToGamma} that takes float values.
* TODO: brightnessfloat merge with above method(?)
* @param val The brightness setting value.
* @param min The minimum acceptable value for the setting.
* @param max The maximum acceptable value for the setting.
* @return The corresponding slider value
*/
public static final int convertLinearToGammaFloat(float val, float min, float max) {
// For some reason, HLG normalizes to the range [0, 12] rather than [0, 1]
final float normalizedVal = MathUtils.norm(min, max, val) * 12;
final float ret;
if (normalizedVal <= 1f) {
ret = MathUtils.sqrt(normalizedVal) * R;
} else {
ret = A * MathUtils.log(normalizedVal - B) + C;
}
return Math.round(MathUtils.lerp(GAMMA_SPACE_MIN, GAMMA_SPACE_MAX, ret));
}
}

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SettingsLib/DisplayUtils/src/com/android/settingslib/display/DisplayDensityConfiguration.java Normal file
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/*
* Copyright (C) 2019 The Android Open Source 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.
*/
package com.android.settingslib.display;
import android.os.AsyncTask;
import android.os.RemoteException;
import android.os.UserHandle;
import android.util.Log;
import android.view.IWindowManager;
import android.view.WindowManagerGlobal;
/** Utility methods for controlling the display density. */
public class DisplayDensityConfiguration {
private static final String LOG_TAG = "DisplayDensityConfig";
/**
* Returns the default density for the specified display.
*
* @param displayId the identifier of the display
* @return the default density of the specified display, or {@code -1} if the display does not
* exist or the density could not be obtained
*/
static int getDefaultDisplayDensity(int displayId) {
try {
final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
return wm.getInitialDisplayDensity(displayId);
} catch (RemoteException exc) {
return -1;
}
}
/**
* Asynchronously applies display density changes to the specified display.
*
* <p>The change will be applied to the user specified by the value of {@link
* UserHandle#myUserId()} at the time the method is called.
*
* @param displayId the identifier of the display to modify
*/
public static void clearForcedDisplayDensity(final int displayId) {
final int userId = UserHandle.myUserId();
AsyncTask.execute(
() -> {
try {
final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
wm.clearForcedDisplayDensityForUser(displayId, userId);
} catch (RemoteException exc) {
Log.w(LOG_TAG, "Unable to clear forced display density setting");
}
});
}
/**
* Asynchronously applies display density changes to the specified display.
*
* <p>The change will be applied to the user specified by the value of {@link
* UserHandle#myUserId()} at the time the method is called.
*
* @param displayId the identifier of the display to modify
* @param density the density to force for the specified display
*/
public static void setForcedDisplayDensity(final int displayId, final int density) {
final int userId = UserHandle.myUserId();
AsyncTask.execute(
() -> {
try {
final IWindowManager wm = WindowManagerGlobal.getWindowManagerService();
wm.setForcedDisplayDensityForUser(displayId, density, userId);
} catch (RemoteException exc) {
Log.w(LOG_TAG, "Unable to save forced display density setting");
}
});
}
}