| /* |
| * 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.server.wm; |
| |
| import android.util.ArraySet; |
| import android.view.Display.Mode; |
| import android.view.DisplayInfo; |
| |
| /** |
| * Policy to select a lower refresh rate for the display if applicable. |
| */ |
| class RefreshRatePolicy { |
| |
| private final int mLowRefreshRateId; |
| private final ArraySet<String> mNonHighRefreshRatePackages = new ArraySet<>(); |
| private final HighRefreshRateBlacklist mHighRefreshRateBlacklist; |
| private final WindowManagerService mWmService; |
| |
| RefreshRatePolicy(WindowManagerService wmService, DisplayInfo displayInfo, |
| HighRefreshRateBlacklist blacklist) { |
| mLowRefreshRateId = findLowRefreshRateModeId(displayInfo); |
| mHighRefreshRateBlacklist = blacklist; |
| mWmService = wmService; |
| } |
| |
| /** |
| * Finds the mode id with the lowest refresh rate which is >= 60hz and same resolution as the |
| * default mode. |
| */ |
| private int findLowRefreshRateModeId(DisplayInfo displayInfo) { |
| Mode mode = displayInfo.getDefaultMode(); |
| float[] refreshRates = displayInfo.getDefaultRefreshRates(); |
| float bestRefreshRate = mode.getRefreshRate(); |
| for (int i = refreshRates.length - 1; i >= 0; i--) { |
| if (refreshRates[i] >= 60f && refreshRates[i] < bestRefreshRate) { |
| bestRefreshRate = refreshRates[i]; |
| } |
| } |
| return displayInfo.findDefaultModeByRefreshRate(bestRefreshRate); |
| } |
| |
| void addNonHighRefreshRatePackage(String packageName) { |
| mNonHighRefreshRatePackages.add(packageName); |
| mWmService.requestTraversal(); |
| } |
| |
| void removeNonHighRefreshRatePackage(String packageName) { |
| mNonHighRefreshRatePackages.remove(packageName); |
| mWmService.requestTraversal(); |
| } |
| |
| int getPreferredModeId(WindowState w) { |
| |
| // If app is animating, it's not able to control refresh rate because we want the animation |
| // to run in default refresh rate. |
| if (w.isAnimating()) { |
| return 0; |
| } |
| |
| // If app requests a certain refresh rate or mode, don't override it. |
| if (w.mAttrs.preferredRefreshRate != 0 || w.mAttrs.preferredDisplayModeId != 0) { |
| return w.mAttrs.preferredDisplayModeId; |
| } |
| |
| final String packageName = w.getOwningPackage(); |
| |
| // If app is using Camera, force it to default (lower) refresh rate. |
| if (mNonHighRefreshRatePackages.contains(packageName)) { |
| return mLowRefreshRateId; |
| } |
| |
| // If app is blacklisted using higher refresh rate, return default (lower) refresh rate |
| if (mHighRefreshRateBlacklist.isBlacklisted(packageName)) { |
| return mLowRefreshRateId; |
| } |
| return 0; |
| } |
| } |