public void TestLMPFileWrite()
{
string fileName = Path.GetTempPath() + Guid.NewGuid() + ".lmp";
// Read BSP and then write to a temp file
var reader = FileReader.OpenStream("testdata/map.bsp");
var bsp1 = new BSP(reader);
reader.Dispose();
bsp1.WriteLMP(fileName, (int)LumpType.GameLump);
// Re-open the temp file and do basic consistency check
using var fs = File.Open(fileName, FileMode.Open, FileAccess.Read);
using var reader2 = new BinaryReader(fs);
Assert.Equal(20, reader2.ReadInt32()); // Lump header size
Assert.Equal((int)LumpType.GameLump, reader2.ReadInt32()); // Lump index/type
Assert.Equal(0, reader2.ReadInt32()); // Lump version
Assert.Equal(60, reader2.ReadInt32()); // Lump data size
Assert.Equal(1, reader2.ReadInt32()); // BSP revision
reader2.Dispose();
File.Delete(fileName);
}
/// <summary>
/// Performs the lump extraction. Assumes that the options have been validated.
/// </summary>
/// <param name="opts">The lump extraction options</param>
/// <exception cref="ArgumentException">Thrown if opts.BSPPath is not a file path</exception>
/// <exception cref="LumpEmptyException">Thrown if the specified lump is already empty</exception>
public static void ExtractLump(Options opts)
{
var lumpIndex = opts.LumpIndex;
var bspFolder = Path.GetDirectoryName(opts.BSPPath);
var bspName = Path.GetFileNameWithoutExtension(opts.BSPPath);
if (bspFolder == null || bspName == null || Directory.Exists(opts.BSPPath))
{
throw new ArgumentException("Invalid BSP path specified");
}
// Read BSP
Console.WriteLine("Reading and parsing BSP");
var bsp = new BSP(opts.BSPPath);
if (bsp.Lumps[lumpIndex].Data.Length <= 1)
{
throw new LumpEmptyException();
}
// True if we will modify the original BSP
var willModify = !opts.DontClear;
// Backup original BSP
if (opts.MakeBackup && willModify)
{
Console.WriteLine("Saving BSP backup");
var backupBSPPath = Path.Combine(bspFolder, $"{bspName}.bsp.orig");
File.Move(opts.BSPPath, backupBSPPath);
}
// Write lump
if (!opts.DontExtract)
{
Console.WriteLine("Writing .lmp file");
var lmpPath = Path.Combine(bspFolder, $"{bspName}_l_{lumpIndex}.lmp");
bsp.WriteLMP(lmpPath, lumpIndex);
}
// Clear lump
if (!opts.DontClear)
{
Console.WriteLine("Clearing lump");
bsp.Lumps[lumpIndex].Clear();
}
// Clear lump and write new BSP
if (willModify)
{
Console.WriteLine("Writing to original file");
bsp.WriteBSP(opts.BSPPath);
}
Console.WriteLine("Done");
}
public void TestLMPWrite()
{
var reader1 = FileReader.OpenStream("testdata/map.bsp");
var bsp = new BSP(reader1);
using var ms = new MemoryStream();
using var writer = new BinaryWriter(ms);
bsp.WriteLMP(writer, (int)LumpType.GameLump);
writer.Flush();
ms.Seek(0, SeekOrigin.Begin);
using var reader2 = new BinaryReader(ms);
Assert.Equal(20, reader2.ReadInt32()); // Lump header size
Assert.Equal((int)LumpType.GameLump, reader2.ReadInt32()); // Lump index/type
Assert.Equal(0, reader2.ReadInt32()); // Lump version
Assert.Equal(60, reader2.ReadInt32()); // Lump data size
Assert.Equal(1, reader2.ReadInt32()); // BSP revision
Assert.Equal(60, ms.Length - ms.Position); // Data
}