87 lines
3.1 KiB
Java
87 lines
3.1 KiB
Java
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.display;
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import static android.hardware.display.DisplayManager.DISPLAY_CATEGORY_ALL_INCLUDING_DISABLED;
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import android.content.Context;
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import android.hardware.display.DisplayManager;
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import android.util.Log;
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import android.view.Display;
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/**
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* Constants and utility methods for refresh rate settings.
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*/
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public class RefreshRateSettingsUtils {
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private static final String TAG = "RefreshRateSettingsUtils";
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public static final float DEFAULT_REFRESH_RATE = 60f;
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/**
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* Find the highest refresh rate among all the modes of the default display.
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*
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* This method will acquire DisplayManager.mLock, so calling it while holding other locks
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* should be done with care.
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* @param context The context
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* @return The highest refresh rate
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*/
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public static float findHighestRefreshRateForDefaultDisplay(Context context) {
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final DisplayManager dm = context.getSystemService(DisplayManager.class);
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final Display display = dm.getDisplay(Display.DEFAULT_DISPLAY);
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if (display == null) {
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Log.w(TAG, "No valid default display device");
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return DEFAULT_REFRESH_RATE;
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}
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float maxRefreshRate = DEFAULT_REFRESH_RATE;
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for (Display.Mode mode : display.getSupportedModes()) {
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if (mode.getRefreshRate() > maxRefreshRate) {
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maxRefreshRate = mode.getRefreshRate();
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}
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}
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return maxRefreshRate;
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}
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/**
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* Find the highest refresh rate among all the modes of all the displays.
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*
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* This method will acquire DisplayManager.mLock, so calling it while holding other locks
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* should be done with care.
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* @param context The context
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* @return The highest refresh rate
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*/
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public static float findHighestRefreshRateAmongAllDisplays(Context context) {
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final DisplayManager dm = context.getSystemService(DisplayManager.class);
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final Display[] displays = dm.getDisplays(DISPLAY_CATEGORY_ALL_INCLUDING_DISABLED);
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if (displays.length == 0) {
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Log.w(TAG, "No valid display devices");
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return DEFAULT_REFRESH_RATE;
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}
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float maxRefreshRate = DEFAULT_REFRESH_RATE;
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for (Display display : displays) {
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for (Display.Mode mode : display.getSupportedModes()) {
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if (mode.getRefreshRate() > maxRefreshRate) {
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maxRefreshRate = mode.getRefreshRate();
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}
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}
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}
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return maxRefreshRate;
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}
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}
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