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