public override ArcFile TryOpen(ArcView file)
{
if (!file.Name.HasExtension(".lay"))
{
return(null);
}
int tile_count = file.View.ReadInt32(0);
int coord_count = file.View.ReadInt32(4);
if (!IsSaneCount(tile_count) || !IsSaneCount(coord_count))
{
return(null);
}
var base_name = Path.GetFileNameWithoutExtension(file.Name).TrimEnd('_');
var png_name = VFS.ChangeFileName(file.Name, base_name + ".png");
if (!VFS.FileExists(png_name))
{
return(null);
}
ImageData image;
var png_entry = VFS.FindFile(png_name);
using (var decoder = VFS.OpenImage(png_entry))
image = decoder.Image;
using (var input = file.CreateStream())
using (var index = new BinaryReader(input))
{
input.Position = 8;
var dir = new List <Entry> (tile_count);
for (int i = 0; i < tile_count; ++i)
{
uint id = index.ReadUInt32();
int first = index.ReadInt32();
int count = index.ReadInt32();
var name = string.Format("{0}#{1:X8}", base_name, id);
var entry = new LayEntry {
Name = name, Type = "image", Offset = 0,
Id = id, First = first, Count = count
};
dir.Add(entry);
}
var tiles = new List <LayCoord> (coord_count);
for (int i = 0; i < coord_count; ++i)
{
var tile = new LayCoord();
tile.TargetX = index.ReadSingle() + 1;
tile.TargetY = index.ReadSingle() + 1;
tile.SourceX = index.ReadSingle() - 1;
tile.SourceY = index.ReadSingle() - 1;
tiles.Add(tile);
}
return(new LayArchive(file, this, dir, image.Bitmap, tiles));
}
}
public IEnumerable <LayCoord> GetTiles(LayEntry layer)
{
return(Tiles.Skip(layer.First).Take(layer.Count));
}