/// <summary>
/// Creates a new <see cref="AssetBundleVariant"/>. Evaluates some conditions and may set <see cref="Errors"/>.
/// </summary>
/// <param name="assetBundleName">Name of the AssetBundle represented by this variant.</param>
/// <param name="fileSizeBytes">Size of the file in bytes, or <see cref="FileSizeIfMissing"/>.</param>
/// <param name="directDependencies">AssetBundles that are direct dependencies of this one.</param>
/// <param name="allDependencies">AssetBundles that are direct or transitive dependencies of this one.</param>
/// <param name="path">The path to the AssetBundle represented by this variant.</param>
public static AssetBundleVariant CreateVariant(
string assetBundleName,
long fileSizeBytes,
string[] directDependencies,
string[] allDependencies,
string path)
{
var variant = new AssetBundleVariant
{
DirectDependencies = directDependencies ?? EmptyStringArray,
AllDependencies = allDependencies ?? EmptyStringArray,
FileSizeBytes = fileSizeBytes,
Path = path,
};
if (fileSizeBytes == FileSizeIfMissing)
{
variant.Errors.Add(AssetPackError.FileMissing);
}
if (!AndroidAppBundle.IsValidModuleName(assetBundleName))
{
variant.Errors.Add(AssetPackError.InvalidName);
}
return(variant);
}
private static void RenderVariant(AssetBundleVariant variant, TextureCompressionFormat targeting)
{
EditorGUILayout.BeginHorizontal();
// TODO: revisit TextureCompressionFormat enum extension methods.
var targetingDescription = targeting == TextureCompressionFormat.Default
? targeting.ToString()
: targeting.ToString().ToUpper();
EditorGUILayout.PrefixLabel(targetingDescription);
EditorGUILayout.LabelField(variant.FileSizeText, GUILayout.ExpandWidth(false));
var errors = variant.Errors;
if (errors.Count == 0)
{
EditorGUILayout.LabelField("No errors", GUILayout.ExpandWidth(true));
}
else
{
if (GUILayout.Button(variant.ErrorSummary + "...", GUILayout.ExpandWidth(true)))
{
var errorDialogTitle = "AssetBundle Error" + (errors.Count == 1 ? string.Empty : "s");
var errorDialogMessage = string.Join("\n\n",
errors.Select(e => NameAndDescriptionAttribute.GetAttribute(e).Description).ToArray());
EditorUtility.DisplayDialog(errorDialogTitle, errorDialogMessage, WindowUtils.OkButtonText);
}
}
EditorGUILayout.EndHorizontal();
}
/// <summary>
/// Adds an <see cref="AssetBundleVariant"/> to this asset pack.
/// <returns>true if the AssetBundle was added, false if another AssetBundle with the same compression
/// is already present.</returns>
/// </summary>
public bool Add(TextureCompressionFormat textureCompressionFormat, AssetBundleVariant variant)
{
AssetBundleVariant existingVariant;
if (Variants.TryGetValue(textureCompressionFormat, out existingVariant))
{
Debug.LogErrorFormat("Multiple AssetBundles for texture format {0} are used for {1}.",
textureCompressionFormat.ToString(), Name);
existingVariant.Errors.Add(AssetPackError.DuplicateName);
return(false);
}
Variants.Add(textureCompressionFormat, variant);
return(true);
}
/// <summary>
/// Scans and returns every <see cref="AssetBundleVariant"/> found in this folder.
/// </summary>
public IDictionary <string, AssetBundleVariant> ExtractAssetBundleVariant()
{
AssetBundleCount = 0;
var assetBundleVariants = new Dictionary <string, AssetBundleVariant>();
if (!Refresh())
{
return(assetBundleVariants);
}
var directoryInfo = new DirectoryInfo(FolderPath);
var files = directoryInfo.GetFiles();
var fileDictionary = files.ToDictionary(file => file.Name, file => file);
// Look for an AssetBundle file with the same name as the directory that contains it.
// This AssetBundle file contains a single asset, which is of type AssetBundleManifest.
// See https://unity3d.com/learn/tutorials/topics/best-practices/assetbundle-fundamentals
FileInfo manifestFileInfo;
if (!fileDictionary.TryGetValue(_searchedManifestFileName, out manifestFileInfo))
{
State = AssetPackFolderState.ManifestFileMissing;
return(assetBundleVariants);
}
var manifestFilePath = manifestFileInfo.FullName;
AssetBundle manifestAssetBundle;
try
{
manifestAssetBundle = AssetBundle.LoadFromFile(manifestFilePath);
}
catch (Exception ex)
{
Debug.LogErrorFormat("Exception loading AssetBundle file containing manifest ({0}): {1}",
manifestFilePath, ex);
State = AssetPackFolderState.ManifestFileLoadError;
return(assetBundleVariants);
}
try
{
var manifest = manifestAssetBundle.LoadAsset <AssetBundleManifest>("AssetBundleManifest");
if (manifest == null)
{
State = AssetPackFolderState.ManifestAssetMissing;
return(assetBundleVariants);
}
var allAssetBundles = manifest.GetAllAssetBundles();
if (allAssetBundles.Length == 0)
{
State = AssetPackFolderState.AssetBundlesMissing;
return(assetBundleVariants);
}
foreach (var assetBundleName in allAssetBundles)
{
FileInfo assetBundleFileInfo;
var fileSizeBytes = fileDictionary.TryGetValue(assetBundleName, out assetBundleFileInfo)
? assetBundleFileInfo.Length
: AssetBundleVariant.FileSizeIfMissing;
assetBundleVariants.Add(
assetBundleName,
AssetBundleVariant.CreateVariant(
assetBundleName,
fileSizeBytes,
manifest.GetDirectDependencies(assetBundleName),
manifest.GetAllDependencies(assetBundleName),
Path.Combine(FolderPath, assetBundleName)));
}
AssetBundleCount = assetBundleVariants.Count;
return(assetBundleVariants);
}
catch (Exception ex)
{
Debug.LogErrorFormat(
"Exception loading AssetBundleManifest from AssetBundle ({0}): {1}", manifestFilePath, ex);
State = AssetPackFolderState.ManifestAssetLoadError;
return(assetBundleVariants);
}
finally
{
// If an AssetBundle isn't unloaded, the Editor will have to be restarted to load it again.
manifestAssetBundle.Unload(true);
}
}