private static byte[] DecodeCmpr(byte[] fileData, uint dataOffset, uint width, uint height)
{
//Decode S3TC1
byte[] buffer = new byte[width * height * 4];
for (int y = 0; y < height / 4; y += 2)
{
for (int x = 0; x < width / 4; x += 2)
{
for (int dy = 0; dy < 2; ++dy)
{
for (int dx = 0; dx < 2; ++dx, dataOffset += 8)
{
if (4 * (x + dx) < width && 4 * (y + dy) < height)
{
Buffer.BlockCopy(fileData, (int)dataOffset, buffer, (int)(8 * ((y + dy) * width / 4 + x + dx)), 8);
}
}
}
}
}
for (int i = 0; i < width * height / 2; i += 8)
{
FSHelpers.Swap(ref buffer[i], ref buffer[i + 1]);
FSHelpers.Swap(ref buffer[i + 2], ref buffer[i + 3]);
buffer[i + 4] = S3TC1ReverseByte(buffer[i + 4]);
buffer[i + 5] = S3TC1ReverseByte(buffer[i + 5]);
buffer[i + 6] = S3TC1ReverseByte(buffer[i + 6]);
buffer[i + 7] = S3TC1ReverseByte(buffer[i + 7]);
}
//Now decompress the DXT1 data within it.
return(DecompressDxt1(buffer, width, height));
}
