private void ReadTextureEntries(BinaryReader br)
{
var validTypes = Enum.GetValues(typeof(WadEntryType)).OfType <WadEntryType>().Select(x => (byte)x).ToArray();
br.BaseStream.Position = _lumpOffset;
for (var i = 0; i < _numTextures; i++)
{
var offset = br.ReadUInt32();
var compressedLength = br.ReadUInt32();
var fullLength = br.ReadUInt32();
var type = br.ReadByte();
var compressionType = br.ReadByte();
br.ReadBytes(2); // struct padding
var name = br.ReadFixedLengthString(Encoding.ASCII, 16).ToLowerInvariant();
if (!validTypes.Contains(type))
{
continue; // Skip unsupported types
}
if (_entries.ContainsKey(name))
{
continue; // Don't add duplicates
}
_entries[name] = new WadEntry(name, (WadEntryType)type, offset, compressionType, compressedLength, fullLength);
}
}
public WadImageStream(WadEntry entry, Stream stream)
{
_entry = entry;
using (var br = new BinaryReader(stream))
{
PrepareData(br);
}
}
public Stream OpenEntry(WadEntry entry)
{
if (entry == null)
{
throw new FileNotFoundException();
}
return(new WadImageStream(entry, new SubStream(_stream, entry.Offset, entry.Length)));
}
public WadImageStream(WadEntry entry, WadPackage package)
{
_entry = entry;
using (var br = new BinaryReader(package.File.Open()))
{
br.BaseStream.Position = entry.Offset;
PrepareData(br);
}
}
private void SetEntryData(WadEntry e, BinaryReader br)
{
uint width, height, paletteSize;
long textureDataOffset, paletteDataOffset;
switch (e.Type)
{
case WadEntryType.Image:
width = br.ReadUInt32();
height = br.ReadUInt32();
textureDataOffset = br.BaseStream.Position;
br.BaseStream.Position += width * height; // Skip texture data
paletteSize = br.ReadUInt16();
paletteDataOffset = br.BaseStream.Position;
break;
case WadEntryType.Texture:
br.BaseStream.Position += 16; // Skip name
width = br.ReadUInt32();
height = br.ReadUInt32();
textureDataOffset = br.BaseStream.Position + 16;
var num = (int)(width * height);
var skipMapData = (num / 4) + (num / 16) + (num / 64);
br.BaseStream.Position += 16 + num + skipMapData; // Skip mipmap offsets, texture data, mipmap texture data
paletteSize = br.ReadUInt16();
paletteDataOffset = br.BaseStream.Position;
break;
/*
* case WadEntryType.Font:
* width = br.ReadUInt32();
* height = br.ReadUInt32();
* textureDataOffset = br.BaseStream.Position + 8 + (256 * 4);
* br.BaseStream.Position += 8 + (256 * 4) + (width * height); // Skip font data, texture data
* paletteSize = br.ReadUInt16();
* paletteDataOffset = br.BaseStream.Position;
* break;*/
default:
throw new ArgumentOutOfRangeException();
}
e.Width = width;
e.Height = height;
e.PaletteSize = paletteSize;
e.TextureDataOffset = textureDataOffset;
e.PaletteDataOffset = paletteDataOffset;
}