private IImage ExtractEmbeddedDXT5A(byte[] bytes,
HWBinaryResourceChunk chunk)
{
// Get raw embedded DXT5 texture from resource file
var width = (int)Math.Sqrt(chunk.Size * 2);
var height = width;
// For some godforsaken reason, every pair of bytes is flipped so we need
// to fix it here. This was really annoying to figure out, haha.
for (var i = 0; i < chunk.Size; i += 2)
{
var offset = (int)chunk.Offset + i;
var byte0 = bytes[offset + 0];
var byte1 = bytes[offset + 1];
bytes[offset + 0] = byte1;
bytes[offset + 1] = byte0;
}
return(DxtDecoder.DecompressDxt5a(bytes,
(int)chunk.Offset,
width,
height));
}
ImageData Unpack()
{
byte[] pixels;
switch (m_texture.m_TextureFormat)
{
case TextureFormat.DXT5:
{
var decoder = new DxtDecoder(m_texture.m_Data, Info);
pixels = decoder.UnpackDXT5();
break;
}
case TextureFormat.Alpha8:
case TextureFormat.R16:
case TextureFormat.RGB24:
case TextureFormat.BGRA32:
case TextureFormat.RGB565:
pixels = m_texture.m_Data;
break;
default:
throw new NotImplementedException("Not supported Unity Texture2D format.");
}
return(ImageData.CreateFlipped(Info, Format, null, pixels, (int)Info.Width * ((Format.BitsPerPixel + 7) / 8)));
}
public static void Main(string[] args)
{
if (args.Length < 4)
{
Console.WriteLine("Format: {fileName} {width} {height} {mode}");
Console.WriteLine("mode: 0 - DXT1; 1 - DXT3; 2 - DXT5");
Console.ReadKey();
return;
}
string path = args[0];
int width = int.Parse(args[1]);
int height = int.Parse(args[2]);
int mode = int.Parse(args[3]);
using (DirectBitmap bitmap = new DirectBitmap(width, height))
{
byte[] data = File.ReadAllBytes(path);
Stopwatch stopwatch = new Stopwatch();
for (int i = 0; i < 5; i++)
{
stopwatch.Start();
for (int j = 0; j < 5; j++)
{
switch (mode)
{
case 0:
DxtDecoder.DecompressDXT1(data, width, height, bitmap.Bits);
break;
case 1:
DxtDecoder.DecompressDXT3(data, width, height, bitmap.Bits);
break;
case 2:
DxtDecoder.DecompressDXT5(data, width, height, bitmap.Bits);
break;
default:
throw new Exception(mode.ToString());
}
}
stopwatch.Stop();
Console.WriteLine("Processed " + stopwatch.ElapsedMilliseconds);
stopwatch.Reset();
}
string dirPath = Path.GetDirectoryName(path);
string fileName = Path.GetFileNameWithoutExtension(path);
string outPath = Path.Combine(dirPath, fileName + ".png");
bitmap.Bitmap.RotateFlip(System.Drawing.RotateFlipType.RotateNoneFlipY);
bitmap.Bitmap.Save(outPath, ImageFormat.Png);
}
Console.WriteLine("Finished!");
}
ImageData Unpack()
{
if (null == m_texture.m_Data || 0 == m_texture.m_Data.Length)
{
m_texture.LoadData(m_reader);
}
byte[] pixels;
switch (m_texture.m_TextureFormat)
{
case TextureFormat.DXT1:
{
var decoder = new DxtDecoder(m_texture.m_Data, Info);
pixels = decoder.UnpackDXT1();
break;
}
case TextureFormat.DXT5:
{
var decoder = new DxtDecoder(m_texture.m_Data, Info);
pixels = decoder.UnpackDXT5();
break;
}
case TextureFormat.Alpha8:
case TextureFormat.R16:
case TextureFormat.RGB24:
case TextureFormat.BGRA32:
case TextureFormat.RGB565:
pixels = m_texture.m_Data;
break;
case TextureFormat.ARGB32:
pixels = ConvertArgb(m_texture.m_Data);
break;
case TextureFormat.RGBA32:
pixels = ConvertRgba(m_texture.m_Data);
break;
case TextureFormat.ARGB4444:
pixels = ConvertArgb16(m_texture.m_Data);
break;
case TextureFormat.BC7:
{
var decoder = new Bc7Decoder(m_texture.m_Data, Info);
pixels = decoder.Unpack();
break;
}
default:
throw new NotImplementedException(string.Format("Not supported Unity Texture2D format '{0}'.", m_texture.m_TextureFormat));
}
return(ImageData.CreateFlipped(Info, Format, null, pixels, (int)Info.Width * ((Format.BitsPerPixel + 7) / 8)));
}
private IImage ExtractEmbeddedDXT1(byte[] bytes,
HWBinaryResourceChunk chunk)
{
// Decompress DXT1 texture and turn it into a Bitmap
var width =
BinaryUtils.ReadInt32BigEndian(bytes, (int)chunk.Offset + 4);
var height =
BinaryUtils.ReadInt32BigEndian(bytes, (int)chunk.Offset + 8);
return(DxtDecoder.DecompressDXT1(bytes,
(int)chunk.Offset + 16,
width,
height));
}
byte[] UnpackDXT5(byte[] input, GxtMetaData info)
{
var decoder = new DxtDecoder(input, info);
int src = 0;
for (int y = 0; y < info.iHeight; y += 4)
{
for (int x = 0; x < info.iWidth; x += 4)
{
int px, py;
GetSwizzledCoords(x / 4, y / 4, info.iWidth / 4, info.iHeight / 4, out px, out py);
decoder.DecompressDXT5Block(input, src, py * 4, px * 4);
src += 16;
}
}
return(decoder.Output);
}
public static DirectBitmap DXTTextureToBitmap(Texture2D texture, byte[] data)
{
int width = texture.Width;
int height = texture.Height;
DirectBitmap bitmap = new DirectBitmap(width, height);
try
{
switch (texture.TextureFormat)
{
case TextureFormat.DXT1:
case TextureFormat.DXT1Crunched:
DxtDecoder.DecompressDXT1(data, width, height, bitmap.Bits);
break;
case TextureFormat.DXT3:
DxtDecoder.DecompressDXT3(data, width, height, bitmap.Bits);
break;
case TextureFormat.DXT5:
case TextureFormat.DXT5Crunched:
DxtDecoder.DecompressDXT5(data, width, height, bitmap.Bits);
break;
default:
throw new Exception(texture.TextureFormat.ToString());
}
bitmap.Bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
return(bitmap);
}
catch
{
bitmap.Dispose();
throw;
}
}
