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75 行
2.2 KiB
75 行
2.2 KiB
using System;
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using System.Runtime.InteropServices;
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using UnityEngine;
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namespace Unity.UIWidgets.engine {
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public class DisplayMetrics {
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static float _devicePixelRatio = 0;
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static Func<float> _devicePixelRatioGetter;
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public static void SetDevicePixelRatioGetter(Func<float> f) {
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_devicePixelRatioGetter = f;
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}
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public static float devicePixelRatio {
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get {
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if (_devicePixelRatioGetter != null) {
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return _devicePixelRatioGetter();
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}
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if (_devicePixelRatio > 0) {
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return _devicePixelRatio;
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}
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#if UNITY_ANDROID
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_devicePixelRatio = AndroidDevicePixelRatio();
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#endif
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#if UNITY_WEBGL
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_devicePixelRatio = UIWidgetsWebGLDevicePixelRatio();
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#endif
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#if UNITY_IOS
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_devicePixelRatio = IOSDeviceSaleFactor();
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#endif
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if (_devicePixelRatio <= 0) {
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_devicePixelRatio = 1;
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}
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return _devicePixelRatio;
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}
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}
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#if UNITY_ANDROID
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static float AndroidDevicePixelRatio() {
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using (
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AndroidJavaClass unityPlayerClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")
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) {
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using (
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AndroidJavaObject metricsInstance = new AndroidJavaObject("android.util.DisplayMetrics"),
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activityInstance = unityPlayerClass.GetStatic<AndroidJavaObject>("currentActivity"),
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windowManagerInstance = activityInstance.Call<AndroidJavaObject>("getWindowManager"),
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displayInstance = windowManagerInstance.Call<AndroidJavaObject>("getDefaultDisplay")
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) {
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displayInstance.Call("getMetrics", metricsInstance);
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return metricsInstance.Get<float>("density");
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}
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}
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}
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#endif
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#if UNITY_WEBGL
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[DllImport("__Internal")]
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static extern float UIWidgetsWebGLDevicePixelRatio();
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#endif
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#if UNITY_IOS
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[DllImport("__Internal")]
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static extern int IOSDeviceSaleFactor();
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#endif
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}
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}
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