IEnumerable <ITextureFile <TTile> > ReadInclude(XElement includeDirective,
TexturePackLoaderContext context,
HashSet <FilePath> path)
{
var file = (string)includeDirective.AttributeLocal("file");
if (file == null)
{
return(new List <ITextureFile <TTile> >());
}
var targetPath = fileSystem.CombinePath(context.BasePath, file);
if (path.Contains(targetPath))
{
throw new TexturePackLoaderException(
$"Circular reference in include files or duplicate include while evaluating path {targetPath}",
includeDirective);
}
path.Add(targetPath);
using (var stream = fileSystem.Read(targetPath))
{
var doc = XDocument.Load(stream);
var root = doc.Root;
var width = (int?)root.AttributeLocal("width") ?? context.Width;
var height = (int?)root.AttributeLocal("height") ?? context.Height;
var textureType = ParseTextureType((string)root.AttributeLocal("type"), context.TextureType);
if (textureType != context.TextureType)
{
throw new TexturePackLoaderException(
$"Include file '{targetPath}' is using a '{textureType}' tile type.", includeDirective);
}
var loaderContext = context.Create(width, height);
return(ReadContent(root, loaderContext, path));
}
}
