/// <summary>
/// Deserialize the shader's attributes from UserData in the shader's importer.
/// If none exists, it returns a new AttributeLayoutContaine instance.
/// </summary>
/// <param name="shader"></param>
/// <returns></returns>
internal static AttributeLayoutContainer LoadShaderMetaData(Shader shader)
{
if (shader == null)
{
throw new ArgumentNullException("shader");
}
string path = AssetDatabase.GetAssetPath(shader);
AssetImporter importer = AssetImporter.GetAtPath(path);
AttributeLayoutContainer data = AttributeLayoutContainer.Create(shader, null);
JsonUtility.FromJsonOverwrite(importer.userData, data);
return(data);
}
/// <summary>
/// Saves the metadata of the shader passed in parameters, can overwrite if necessary
/// </summary>
/// <param name="shader">Shader associated with the metadata</param>
/// <param name="attributes">Metadata to write</param>
/// <param name="overwrite">Will overwrite if already existing file</param>
/// <param name="logErrors">Log errors or not</param>
/// <returns></returns>
internal static string SaveMeshAttributesData(Shader shader, AttributeLayout[] attributes, bool overwrite = false, bool logErrors = true)
{
if (shader == null || attributes == null)
{
if (logErrors)
{
Debug.LogError("Cannot save null attributes for shader.");
}
return(null);
}
string path = FindPolybrushMetaDataForShader(shader);
string shader_path = AssetDatabase.GetAssetPath(shader);
string shader_directory = Path.GetDirectoryName(shader_path);
string shader_filename = Path.GetFileNameWithoutExtension(path);
// metadata didn't exist before
if (string.IsNullOrEmpty(path))
{
if (string.IsNullOrEmpty(shader_path))
{
// how!?
path = EditorUtility.SaveFilePanelInProject(
"Save Polybrush Shader Attributes",
shader_filename,
SHADER_ATTRIB_FILE_EXTENSION,
"Please enter a file name to save Polybrush shader metadata to.");
if (string.IsNullOrEmpty(path))
{
Debug.LogWarning(string.Format("Could not save Polybrush shader metadata. Please try again, possibly with a different file name or folder path."));
return(null);
}
}
else
{
shader_filename = Path.GetFileNameWithoutExtension(shader_path);
path = string.Format("{0}/{1}.{2}", shader_directory, shader_filename, SHADER_ATTRIB_FILE_EXTENSION);
}
}
if (!overwrite && File.Exists(path))
{
// @todo
Debug.LogWarning("shader metadata exists. calling function refuses to overwrite and lazy developer didn't add a save dialog here.");
return(null);
}
try
{
AttributeLayoutContainer container = AttributeLayoutContainer.Create(shader, attributes);
string json = JsonUtility.ToJson(container, true);
File.WriteAllText(path, json);
//note: convert it here to be able to load it using AssetDatabase functions
shader_filename = Path.GetFileNameWithoutExtension(shader_path);
path = string.Format("{0}/{1}.{2}", shader_directory, shader_filename, SHADER_ATTRIB_FILE_EXTENSION);
//-------
return(path);
}
catch (System.Exception e)
{
if (logErrors)
{
Debug.LogError("Failed saving Polybrush Shader MetaData\n" + e.ToString());
}
return(path);
}
}
