public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = (NgpMetaData)info;
using (var input = new StreamRegion (stream, 0x104, meta.PackedSize, true))
using (var z = new ZLibStream (input, CompressionMode.Decompress))
{
var pixels = new byte[meta.UnpackedSize];
if (pixels.Length != z.Read (pixels, 0, pixels.Length))
throw new EndOfStreamException();
PixelFormat format;
if (32 == meta.BPP)
format = PixelFormats.Bgra32;
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (8 == meta.BPP)
format = PixelFormats.Gray8;
else
throw new System.NotSupportedException ("Not supported NGP image color depth");
return ImageData.Create (info, format, null, pixels);
}
}
void UnpackZlib()
{
m_input.Position = 0x38;
using (var z = new ZLibStream (m_input, CompressionMode.Decompress, true))
if (m_info.UnpackedSize1 != z.Read (m_output, 0, m_info.UnpackedSize1))
throw new EndOfStreamException();
m_input.Position = 0x38 + m_info.CompressedSize1;
using (var z = new ZLibStream (m_input, CompressionMode.Decompress, true))
if (m_info.UnpackedSize2 != z.Read (m_output, m_info.UnpackedSize1, m_info.UnpackedSize2))
throw new EndOfStreamException();
}
uint ReadSysenvSeed(ArcView file, IEnumerable<Entry> dir, uint key)
{
var entry = dir.FirstOrDefault (e => e.Name.Equals ("sysenv.tbl", StringComparison.InvariantCultureIgnoreCase));
if (null == entry)
return key;
var data = file.View.ReadBytes (entry.Offset, entry.Size);
if (data.Length <= 4)
throw new InvalidFormatException ("Invalid sysenv.tbl size");
Decrypt (data, entry.Offset, key);
uint adler32 = LittleEndian.ToUInt32 (data, 0);
if (adler32 != Adler32.Compute (data, 4, data.Length-4))
throw new InvalidEncryptionScheme();
using (var input = new MemoryStream (data, 4, data.Length-4))
using (var sysenv_stream = new ZLibStream (input, CompressionMode.Decompress))
{
var seed = new byte[0x10];
if (0x10 != sysenv_stream.Read (seed, 0, 0x10))
throw new InvalidFormatException ("Invalid sysenv.tbl size");
return EncryptionScheme.GenerateContentKey (seed);
}
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var hzc = (HzcArchive)arc;
using (var input = arc.File.CreateStream (0xC+hzc.ImageInfo.HeaderSize))
using (var z = new ZLibStream (input, CompressionMode.Decompress))
{
uint frame_size = entry.Size - 0x12;
var pixels = new byte[frame_size];
uint offset = 0;
for (;;)
{
if (pixels.Length != z.Read (pixels, 0, pixels.Length))
break;
if (offset >= entry.Offset)
break;
offset += frame_size;
}
if (4 == hzc.ImageInfo.Type)
{
for (int i = 0; i < pixels.Length; ++i)
if (1 == pixels[i])
pixels[i] = 0xFF;
}
return TgaStream.Create (hzc.ImageInfo, pixels);
}
}
public Reader(Stream stream, QntMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
int w = (m_width + 1) & ~1;
int h = (m_height + 1) & ~1;
int rgb_size = h * w * 3;
m_bpp = info.AlphaSize != 0 ? 4 : 3;
m_input = new byte[rgb_size];
var alpha_pos = stream.Position + info.RGBSize;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (rgb_size != zstream.Read (m_input, 0, rgb_size))
throw new InvalidFormatException ("Unexpected end of file");
if (info.AlphaSize != 0)
{
int alpha_size = w * m_height;
m_alpha = new byte[alpha_size];
stream.Position = alpha_pos;
using (var zstream = new ZLibStream (stream, CompressionMode.Decompress, true))
if (alpha_size != zstream.Read (m_alpha, 0, alpha_size))
throw new InvalidFormatException ("Unexpected end of file");
}
m_output = new byte[info.Width*info.Height*m_bpp];
}
void UnpackV0()
{
byte[] channel = new byte[m_width*m_height];
long start_pos = m_input.Position;
for (int i = 0; i < 4; ++i)
{
if (0 == m_channel[StreamMap[i]])
continue;
m_input.Position = start_pos + 4; // skip crc32
using (var input = new ZLibStream (m_input, CompressionMode.Decompress, true))
{
int channel_size = input.Read (channel, 0, channel.Length);
int dst = ChannelMap[i];
for (int j = 0; j < channel_size; ++j)
{
m_output[dst] = channel[j];
dst += 4;
}
}
start_pos += m_channel[StreamMap[i]];
}
}