update

Packages/app.rive.rive-unity/Runtime/EmbeddedAssetDataLoader.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using Rive.Utils;
+
+
+namespace Rive
+{
+    /// <summary>
+    /// Utility class for loading embedded asset data from a Rive file's byte data.
+    /// </summary>
+    internal class EmbeddedAssetDataLoader
+    {
+        public const string ERROR_CODE_RIVE_FILE_BYTES_NULL_OR_EMPTY = "RIVE_FILE_BYTES_NULL_OR_EMPTY";
+
+
+        public EmbeddedAssetDataLoader()
+        {
+        }
+
+
+        /// <summary>
+        /// Load the embedded assets from a Rive file's byte data.
+        /// </summary>
+        /// <param name="riveFileBytes"> The bytes of the Rive file. </param>
+        /// <returns> An enumerable of embedded assets. </returns>
+        public IEnumerable<EmbeddedAssetData> LoadEmbeddedAssetDataFromRiveFileBytes(byte[] riveFileBytes)
+        {
+
+            if (riveFileBytes == null || riveFileBytes.Length == 0)
+            {
+                DebugLogger.Instance.LogError(ERROR_CODE_RIVE_FILE_BYTES_NULL_OR_EMPTY + " - The Rive file bytes are null or empty.");
+                yield break;
+            }
+
+
+            IntPtr listPtr = IntPtr.Zero;
+            try
+            {
+                listPtr = loadEmbeddedAssetList(riveFileBytes, (nuint)riveFileBytes.Length);
+                nuint assetCount = getEmbeddedAssetCount(listPtr);
+
+                for (nuint i = 0; i < assetCount; i++)
+                {
+                    string name = Marshal.PtrToStringAnsi(getEmbeddedAssetName(listPtr, i));
+                    ushort type = getEmbeddedAssetType(listPtr, i);
+                    var assetType = Enum.IsDefined(typeof(EmbeddedAssetType), type)
+                            ? (EmbeddedAssetType)type
+                            : EmbeddedAssetType.Unknown;
+                    uint id = getEmbeddedAssetId(listPtr, i);
+                    uint embeddedBytes = (uint)getEmbeddedAssetSize(listPtr, i);
+                    var embeddedAsset = new EmbeddedAssetData(assetType, id, name, embeddedBytes);
+
+                    yield return embeddedAsset;
+                }
+            }
+            finally
+            {
+                if (listPtr != IntPtr.Zero)
+                {
+                    deleteEmbeddedAssetList(listPtr);
+                }
+            }
+        }
+
+
+        #region Native Methods
+        [DllImport(NativeLibrary.name)]
+        internal static extern IntPtr loadEmbeddedAssetList(byte[] bytes, nuint byteCount);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern void deleteEmbeddedAssetList(IntPtr list);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern nuint getEmbeddedAssetCount(IntPtr list);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern IntPtr getEmbeddedAssetName(IntPtr riveFile, nuint index);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern ushort getEmbeddedAssetType(IntPtr riveFile, nuint index);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern uint getEmbeddedAssetId(IntPtr riveFile, nuint index);
+
+        [DllImport(NativeLibrary.name)]
+        internal static extern nuint getEmbeddedAssetSize(IntPtr riveFile, nuint index);
+        #endregion
+    }
+}