private void ReadTiles(IEnumerable <XElement> tileElements, TilesetContent tileset, Surface.Core.Primitives.Size dimensions)
{
var readTiles = new List <Cell>();
foreach (var tileElement in tileElements)
{
// Get the cx position for the tile.
var x = tileElement.ReadAttribute("x", -1);
if (x == -1)
{
throw new InvalidOperationException("Tile is missing its x position.");
}
// Get the cy position for the tile.
var y = tileElement.ReadAttribute("y", -1);
if (y == -1)
{
throw new InvalidOperationException("Tile is missing its y position.");
}
// Get the type of the tile.
var type = tileElement.ReadAttribute("type", string.Empty);
if (string.IsNullOrWhiteSpace(type))
{
throw new InvalidOperationException("Tile is missing its type.");
}
// Create the tile.
var tile = new TilesetTileContent();
tile.TilesetIndex = x + ((dimensions.Width / 16) * y);
tile.TilesetPosition = new Cell(x, y);
tile.Type = GetTileContentType(type);
// Got frames?
var frames = ReadFrames(tileElement);
if (frames.Count > 0)
{
tile.Frames.AddRange(frames);
}
// Has this tile been read before?
if (readTiles.Any(cell => cell.X == x && cell.Y == y))
{
string message = string.Format("Duplicate tile definition found in tileset ({0}, {1}).", x, y);
throw new InvalidOperationException(message);
}
// Add this tile to the list of read ones.
readTiles.Add(new Cell(x, y));
// Add the tile to the tileset.
tileset.Tiles.Add(tile);
}
}
public override TilesetContent Import(Context context, IFile file)
{
TilesetContent tileset = new TilesetContent();
XDocument document = LoadXml(file);
// Find the root element.
XElement root = document.Element("tileset");
if (root == null)
{
throw new InvalidOperationException("Could not find start element 'tileset' in tileset definition.");
}
// Read tileset information.
tileset.Asset = root.ReadAttribute("asset", string.Empty);
var assetPath = context.InputDirectory.Combine(new FilePath(tileset.Asset + ".png"));
if (!assetPath.Exists(context.FileSystem))
{
string message = string.Format("The tileset texture '{0}' does not exist.", assetPath);
throw new InvalidOperationException(message);
}
// Find out the total size of the image.
var dimensions = ImageHelper.GetDimensions(assetPath.FullPath);
if (dimensions.Width % 16 == 0 && dimensions.Height % 16 != 0)
{
const string message = "Tileset size is not dividable by 16.";
throw new InvalidOperationException(message);
}
// Find the tiles element.
XElement[] tileElements = root.Elements("tile").ToArray();
if (tileElements.Length == 0)
{
string message = string.Format("The tileset '{0}' contain no tiles.", file.Path.FullPath);
throw new InvalidOperationException(message);
}
// Iterate all tiles.
ReadTiles(tileElements, tileset, dimensions);
// Complement missing tiles.
for (int y = 0; y < (dimensions.Height / 16); y++)
{
for (int x = 0; x < (dimensions.Width / 16); x++)
{
int tileIndex = x + ((dimensions.Width / 16) * y);
if (tileset.Tiles.All(t => t.TilesetIndex != tileIndex))
{
var tile = new TilesetTileContent();
tile.TilesetIndex = tileIndex;
tile.TilesetPosition = new Cell(x, y);
tile.Type = TileType.Nothing;
tileset.Tiles.Add(tile);
}
}
}
// Return the tileset.
return(tileset);
}
