public static Bitmap DecodeCatImage(ShandalarAsset asset)
{
//Console.WriteLine("Decompressing " + asset.filename);
byte[] uncompressedData = Vlc.VlcDecompress(asset.data);
int width = (int)BitConverter.ToUInt32(asset.data, 0x1c);
int height = (int)BitConverter.ToUInt32(asset.data, 0x20);
int smallTableSize = (int)BitConverter.ToUInt32(asset.data, 0x24);
int newWidth;
int newHeight;
if ((int)BitConverter.ToUInt32(asset.data, 0) != 0)
{
bool halfSize = BitConverter.ToUInt32(asset.data, 0x28) == 1 ? true : false;
if (halfSize)
{
newWidth = width / 2;
newHeight = height / 2;
}
else
{
newWidth = width;
newHeight = height;
}
}
else
{
newWidth = width;
newHeight = height;
}
int ptr1 = 0;
int ptr2 = ptr1 + width * width * 4 + 0x80;
int ptr3 = ptr2 + newWidth * newWidth * 4 + 0x80;
int[] tempArray = GeneralUtilityFunctions.ByteArrayToIntArray(uncompressedData, 0);
Wavelet.WaveletDecode(ref tempArray, ptr1, width, smallTableSize);
Wavelet.WaveletDecode(ref tempArray, ptr2 / 4, newWidth, smallTableSize);
Wavelet.WaveletDecode(ref tempArray, ptr3 / 4, newWidth, smallTableSize);
/// YCbCr -> RGB
Bitmap outputImage = Wavelet.Decode_YCbCrToRGB(tempArray,
ptr1,
width,
height,
ptr2 / 4,
ptr3 / 4,
newWidth,
newHeight);
// Return image
return(outputImage);
}
public static byte[] VlcDecompress(byte[] srcBytes) // 0x4928AF
{
int decompressedSize = (int)BitConverter.ToUInt32(srcBytes, 0x90) + 20000;
byte[] result = new byte[decompressedSize];
/// Block 1
int ecx = (int)BitConverter.ToUInt32(srcBytes, 0x28) - 1;
ecx = (ecx == 0) ? 1 : 2;
int width = (int)BitConverter.ToUInt32(srcBytes, 0x1c);
int var_30 = width / ecx;
int var_2C = var_30;
/// Block 2
ecx = BitConverter.ToUInt32(srcBytes, 0) == 0 ? 1 : 2;
int var_18 = var_2C / ecx;
int var_10 = var_18;
byte[] dataPtr = srcBytes.Skip(0x9c).ToArray(); // skip header
int smallTableSize = (int)BitConverter.ToUInt32(srcBytes, 0x24);
int eax = var_18 * var_10;
ecx = var_30 * var_2C;
int var_C = ecx + 2 * eax;
/// Step 1
int dataOffset = 0;
int bigIndexCount = (int)BitConverter.ToUInt32(dataPtr, dataOffset);
dataOffset += 4;
int[] bigIndexTabPtr = GeneralUtilityFunctions.ByteArrayToIntArray(dataPtr, dataOffset);
bigIndexTabPtr[0] = int.MinValue;
dataOffset += bigIndexCount * 4; // Skip large index table
dataOffset += Vlc_GenTabs(dataPtr, dataOffset, bigIndexTabPtr, bigIndexCount);
/// Loop
int pieceNum = 0; /// piece num
while (pieceNum < BitConverter.ToUInt32(srcBytes, 0x28))
{
int size;
/// Calculate pointers
int tableSize = smallTableSize * smallTableSize * 4;
int var_24_offset = (var_C + 0x40) * pieceNum * 4;
int var_38_offset = var_24_offset + var_30 * var_2C * 4 + 0x80;
int var_34_offset = var_38_offset + var_18 * var_10 * 4 + 0x80;
/// Small index table + data 1
Array.Copy(dataPtr, dataOffset, result, var_24_offset, tableSize);
var_24_offset += tableSize;
dataOffset += tableSize;
size = (int)BitConverter.ToUInt32(srcBytes, pieceNum * 4 + 0x5c);
Vlc_DecompressChunk(dataPtr, dataOffset, ref result, var_24_offset, size);
dataOffset += size;
/// Small index table + data 2
Array.Copy(dataPtr, dataOffset, result, var_38_offset, tableSize);
var_38_offset += tableSize;
dataOffset += tableSize;
size = (int)BitConverter.ToUInt32(srcBytes, pieceNum * 4 + 0x6c);
Vlc_DecompressChunk(dataPtr, dataOffset, ref result, var_38_offset, size);
dataOffset += size;
/// Small index table + data 3
Array.Copy(dataPtr, dataOffset, result, var_34_offset, tableSize);
var_34_offset += tableSize;
dataOffset += tableSize;
size = (int)BitConverter.ToUInt32(srcBytes, pieceNum * 4 + 0x7c);
Vlc_DecompressChunk(dataPtr, dataOffset, ref result, var_34_offset, size);
dataOffset += size;
pieceNum++;
}
return(result);
}
