// Get a single resource from the WAD file
public static byte[] GetResource(FileStream wadStream, WADEntry entry)
{
wadStream.Seek(entry.ResourceOffset, SeekOrigin.Begin);
var bytes = new byte[entry.ResourceLength];
wadStream.Read(bytes, 0, entry.ResourceLength);
return(bytes);
}
// Get a raw sprite - floors and ceilings mostly
public static SpriteData GetRawSprite(FileStream wadStream, WADEntry spriteEntry)
{
var res = GetResource(wadStream, spriteEntry);
return(new SpriteData(spriteEntry.Name, SpriteType.Raw, 64, 64, 0, 0, res));
}
// Get a picture sprite: basically, anything that is not a floor or ceiling texture
public static SpriteData GetPictureSprite(FileStream wadStream, WADEntry spriteEntry)
{
var res = GetResource(wadStream, spriteEntry);
return(new SpriteData(spriteEntry.Name, SpriteType.Picture, BitConverter.ToInt16(res, 0), BitConverter.ToInt16(res, 2), BitConverter.ToInt16(res, 4), BitConverter.ToInt16(res, 6), res));
}
// Deals with reading data from the WAD file
// See https://github.com/nukeop/TheUnofficialDoomSpecs
public static WADInfo GetInfo(FileStream wadStream)
{
// Root WAD data
var wi = new WADInfo()
{
Type = ReadString(wadStream, 0, 4),
NumEntries = ReadInt(wadStream, 4, 4),
DirectoryOffset = ReadInt(wadStream, 8, 4)
};
// Get a list of the contents of the WAD
for (var i = 0; i < wi.NumEntries; i++)
{
var entryOffset = wi.DirectoryOffset + (i * 16);
var entry = new WADEntry()
{
ResourceOffset = ReadInt(wadStream, entryOffset, 4),
ResourceLength = ReadInt(wadStream, entryOffset + 4, 4),
Name = ReadString(wadStream, entryOffset + 8, 8)
};
wi.Entries.Add(entry);
if (!wi.EntryDictionary.ContainsKey(entry.Name.Replace("\0", "")))
{
wi.EntryDictionary.Add(entry.Name.Replace("\0", ""), entry);
//Debug.Log(entry.Name);
}
}
// Wall patches
// Get patchnames lookup
var patchesEntry = wi.EntryDictionary["PNAMES"];
var patchesData = GetResource(wadStream, patchesEntry);
var numPatches = BitConverter.ToInt32(patchesData, 0);
wi.PatchNames = new string[numPatches];
var pos = 4;
for (var i = 0; i < numPatches; i++)
{
wi.PatchNames[i] = Encoding.UTF8.GetString(patchesData, pos, 8).ToUpper().Replace("\0", "");
pos += 8;
}
// Wall textures: textures listed in the TEXTURE1 resource are for shareware (Episode 1) maps, all others are in TEXTURE2.
var texEntry = wi.EntryDictionary["TEXTURE1"];
var texList = GetTextures(wadStream, wi, GetResource(wadStream, texEntry));
foreach (var t in texList)
{
wi.WallTextures.Add(t.Name, t);
}
if (wi.EntryDictionary.ContainsKey("TEXTURE2"))
{
texEntry = wi.EntryDictionary["TEXTURE2"];
texList = GetTextures(wadStream, wi, GetResource(wadStream, texEntry));
foreach (var t in texList)
{
wi.WallTextures.Add(t.Name, t);
}
}
return(wi);
}
