87 lines
3.0 KiB
Java
87 lines
3.0 KiB
Java
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/*
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* Copyright (C) 2021 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 android.util;
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import android.content.res.Resources;
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import android.view.Display;
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import com.android.internal.R;
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/**
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* Utils for loading display related resources and calculations.
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*
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* @hide
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*/
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public class DisplayUtils {
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/**
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* Gets the index of the given display unique id in {@link R.array#config_displayUniqueIdArray}
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* which is used to get the related cutout configs for that display.
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*
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* For multi-display device, {@link R.array#config_displayUniqueIdArray} should be set for each
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* display if there are different type of cutouts on each display.
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* For single display device, {@link R.array#config_displayUniqueIdArray} should not to be set
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* and the system will load the default configs for main built-in display.
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*/
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public static int getDisplayUniqueIdConfigIndex(Resources res, String displayUniqueId) {
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int index = -1;
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if (displayUniqueId == null || displayUniqueId.isEmpty()) {
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return index;
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}
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final String[] ids = res.getStringArray(R.array.config_displayUniqueIdArray);
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final int size = ids.length;
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for (int i = 0; i < size; i++) {
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if (displayUniqueId.equals(ids[i])) {
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index = i;
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break;
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}
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}
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return index;
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}
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/**
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* Returns the Display.Mode with maximum resolution.
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*/
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public static Display.Mode getMaximumResolutionDisplayMode(Display.Mode[] modes) {
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if (modes == null || modes.length == 0) {
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return null;
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}
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int maxWidth = 0;
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Display.Mode target = null;
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for (Display.Mode mode : modes) {
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if (mode.getPhysicalWidth() > maxWidth) {
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maxWidth = mode.getPhysicalWidth();
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target = mode;
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}
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}
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return target;
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}
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/**
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* Get the display size ratio based on the physical display size.
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*/
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public static float getPhysicalPixelDisplaySizeRatio(
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int physicalWidth, int physicalHeight, int currentWidth, int currentHeight) {
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if (physicalWidth == currentWidth && physicalHeight == currentHeight) {
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return 1f;
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}
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final float widthRatio = (float) currentWidth / physicalWidth;
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final float heightRatio = (float) currentHeight / physicalHeight;
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return Math.min(widthRatio, heightRatio);
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}
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}
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