private static WadDirectoryEntry ReadWadEntry(ByteReader reader)
{
int offset = reader.Int();
int size = reader.Int();
UpperString name = reader.StringWithoutNulls(8);
return(new WadDirectoryEntry(offset, size, name));
}
private static WadHeader ReadHeader(ByteReader reader)
{
bool iwad = reader.String(4).ToUpper() == "IWAD";
int entryCount = reader.Int();
int dirOffset = reader.Int();
return(new WadHeader(iwad, entryCount, dirOffset));
}
public static Optional <TextureXImage> From(ByteReader reader)
{
try
{
UpperString name = reader.StringWithoutNulls(8);
TextureXFlags flags = (TextureXFlags)reader.UShort();
Vector2 scale = new Vector2(reader.Byte(), reader.Byte());
Dimension dimension = new Dimension(reader.Short(), reader.Short());
int columnDirectory = reader.Int();
int patchCount = reader.Short();
List <TextureXPatch> patches = Range(patchCount).Map(i =>
{
Vec2I offset = new Vec2I(reader.Short(), reader.Short());
short patchIndex = reader.Short();
short stepDirection = reader.Short();
short colormap = reader.Short();
return(new TextureXPatch(offset, patchIndex, stepDirection, colormap));
}).ToList();
return(new TextureXImage(name, flags, scale, dimension, columnDirectory, patches));
}
catch
{
return(Empty);
}
}
/// <summary>
/// Reads a TEXTURE1/2 entry.
/// </summary>
/// <param name="number">The index of the X in the textureX. Should be
/// either 1 or 2.</param>
/// <param name="data">The data to read.</param>
/// <returns>All the processed texture definitions, or null if the
/// entry is corrupt.</returns>
public static Optional <TextureX> From(int number, byte[] data)
{
Debug.Assert(number == 1 || number == 2, "TEXTUREx should have only 1 or 2 as a number");
try
{
ByteReader reader = ByteReader.From(ByteOrder.Little, data);
Dictionary <UpperString, TextureXImage> images = new Dictionary <UpperString, TextureXImage>();
int numTextures = reader.Int();
List <int> offsets = new List <int>();
for (int i = 0; i < numTextures; i++)
{
offsets.Add(reader.Int());
}
foreach (int offset in offsets)
{
reader.Offset = offset;
Optional <TextureXImage> imageOptional = TextureXImage.From(reader);
if (!imageOptional)
{
return(Empty);
}
// Unfortunately we have to follow the specification as per
// the ZDoom wiki: "...however if a texture is defined
// more than once in the same TEXTUREx lump, the later
// definitions are skipped".
TextureXImage image = imageOptional.Value;
if (!images.ContainsKey(image.Name))
{
images[image.Name] = image;
}
}
return(new TextureX(number, images.Values));
}
catch
{
return(Empty);
}
}
/// <summary>
/// Reads a pnames data from the entry provided.
/// </summary>
/// <param name="data">The data to read from.</param>
/// <returns>A read pnames object from the entry, or an empty value if
/// the entry has the wrong data amount or is corrupt.</returns>
public static Optional <PNames> From(byte[] data)
{
try
{
ByteReader reader = ByteReader.From(ByteOrder.Little, data);
int numStrings = reader.Int();
List <UpperString> pnames = new List <UpperString>(numStrings);
for (int i = 0; i < numStrings; i++)
{
pnames.Add(reader.StringWithoutNulls(8));
}
return(new PNames(pnames));
}
catch
{
return(Empty);
}
}
/// <summary>
/// Creates a palette image from a column-based image.
/// </summary>
/// <param name="data">The data for the image.</param>
/// <param name="resourceNamespace">The namespace this image belongs
/// to.</param>
/// <returns>The palette image for the data, or null if the image is
/// corrupt and would not make a valid column image.</returns>
public static Optional <PaletteImage> FromColumn(byte[] data, ResourceNamespace resourceNamespace)
{
// OPTIMIZE: Short circuit if it's likely not a column image.
// OPTIMIZE: Write posts horizontally, then rotate for speed?
try
{
ByteReader reader = ByteReader.From(ByteOrder.Little, data);
int width = reader.Short();
int height = reader.Short();
Vec2I offset = (reader.Short(), reader.Short());
if (offset.X < 0 || offset.Y < 0)
{
return(Empty);
}
int[] offsets = new int[width];
for (int i = 0; i < width; i++)
{
offsets[i] = reader.Int();
}
short[] indices = Arrays.Create(width * height, TransparentIndex);
for (int col = 0; col < width; col++)
{
reader.Offset = offsets[col];
while (true)
{
int rowStart = reader.Byte();
if (rowStart == 0xFF)
{
break;
}
int indicesCount = reader.Byte();
reader.Skip(1);
byte[] paletteIndices = reader.Bytes(indicesCount);
reader.Skip(1);
int indicesOffset = (rowStart * width) + col;
for (int i = 0; i < paletteIndices.Length; i++)
{
indices[indicesOffset] = paletteIndices[i];
indicesOffset += width;
}
}
}
return(new PaletteImage(width, height, indices)
{
Namespace = resourceNamespace,
Offset = offset
});
}
catch
{
return(Empty);
}
}
