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