46 lines
1.8 KiB
C#
46 lines
1.8 KiB
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using UnityEngine;
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using UnityEngine.Networking;
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namespace TapTap.Common.Internal.Utils {
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public class ImageUtils {
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private static Dictionary<string, WeakReference<Texture>> cachedTextures = new Dictionary<string, WeakReference<Texture>>();
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public static async Task<Texture> LoadImage(string url) {
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if (string.IsNullOrEmpty(url)) {
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TapLogger.Warn(string.Format($"ImageUtils Fetch image is null! url is null or empty!"));
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return null;
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}
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if (cachedTextures.TryGetValue(url, out WeakReference<Texture> refTex) &&
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refTex.TryGetTarget(out Texture tex)) {
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return tex;
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} else {
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Texture newTex = await FetchImage(url);
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cachedTextures[url] = new WeakReference<Texture>(newTex);
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return newTex;
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}
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}
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public static async Task<Texture> FetchImage(string url) {
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UnityWebRequest www = UnityWebRequestTexture.GetTexture(url);
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UnityWebRequestAsyncOperation operation = www.SendWebRequest();
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while (!operation.isDone) {
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await Task.Delay(50);
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}
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if (www.isNetworkError || www.isHttpError) {
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throw new Exception("Fetch image error.");
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} else {
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var texture = ((DownloadHandlerTexture)www.downloadHandler)?.texture;
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if (texture == null){
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TapLogger.Warn(string.Format($"ImageUtils Fetch image is null! url: {url}"));
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}
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return texture;
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}
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}
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}
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}
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