[unity] OnDemandTextureLoader: Added TextureLoadFailed callback, used by Addressables extension package.

spine-unity/Assets/Spine/Runtime/spine-unity/Asset Types/OnDemandTextureLoader.cs

@@ -89,6 +89,7 @@ namespace Spine.Unity {
 		public delegate void TextureLoadDelegate (OnDemandTextureLoader loader, Material material, int textureIndex);
 		protected event TextureLoadDelegate onTextureRequested;
 		protected event TextureLoadDelegate onTextureLoaded;
+		protected event TextureLoadDelegate onTextureLoadFailed;
 		protected event TextureLoadDelegate onTextureUnloaded;
 
 		public event TextureLoadDelegate TextureRequested {
@@ -99,6 +100,10 @@ namespace Spine.Unity {
 			add { onTextureLoaded += value; }
 			remove { onTextureLoaded -= value; }
 		}
+		public event TextureLoadDelegate TextureLoadFailed {
+			add { onTextureLoadFailed += value; }
+			remove { onTextureLoadFailed -= value; }
+		}
 		public event TextureLoadDelegate TextureUnloaded {
 			add { onTextureUnloaded += value; }
 			remove { onTextureUnloaded -= value; }
@@ -112,6 +117,10 @@ namespace Spine.Unity {
 			if (onTextureLoaded != null)
 				onTextureLoaded(this, material, textureIndex);
 		}
+		protected void OnTextureLoadFailed (Material material, int textureIndex) {
+			if (onTextureLoadFailed != null)
+				onTextureLoadFailed(this, material, textureIndex);
+		}
 		protected void OnTextureUnloaded (Material material, int textureIndex) {
 			if (onTextureUnloaded != null)
 				onTextureUnloaded(this, material, textureIndex);

spine-unity/Modules/com.esotericsoftware.spine.addressables/Runtime/AddressablesTextureLoader.cs

@@ -87,6 +87,8 @@ namespace Spine.Unity {
 					materialToUpdate.mainTexture = loadedTexture;
 					OnTextureLoaded(materialToUpdate, textureIndex);
 					if (onTextureLoaded != null) onTextureLoaded(loadedTexture);
+				} else {
+					OnTextureLoadFailed(materialToUpdate, textureIndex);
 				}
 			};
 		}

spine-unity/Modules/com.esotericsoftware.spine.addressables/package.json

@@ -2,7 +2,7 @@
 	"name": "com.esotericsoftware.spine.addressables",
 	"displayName": "Spine Addressables Extensions [Experimental]",
 	"description": "This experimental plugin provides integration of Addressables on-demand texture loading for the spine-unity runtime.\nPlease be sure to test this package first and create backups of your project before using.\n\nUsage: First declare your target Material textures as addressable. Then select the SpineAtlasAsset, right-click the SpineAtlasAsset Inspector heading and select 'Add Addressables Loader'. This generates an 'AddressableTextureLoader' asset providing configuration parameters and sets up low-resolution placeholder textures which are automatically assigned in a pre-build step when building your game executable.\n\nPrerequisites:\nIt requires a working installation of the spine-unity runtime (via the spine-unity unitypackage), version 4.2.\n(See http://esotericsoftware.com/git/spine-runtimes/spine-unity)",
-	"version": "4.2.0-preview.3",
+	"version": "4.2.0-preview.4",
 	"unity": "2018.3",
 	"author": {
 		"name": "Esoteric Software",