public override ImageData Read(Stream stream, ImageMetaData info)
{
stream.Position = 8;
var palette = ReadPalette (stream);
var pixels = new byte[info.Width * info.Height];
using (var reader = new LzssStream (stream, LzssMode.Decompress, true))
{
if (pixels.Length != reader.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException();
return ImageData.CreateFlipped (info, PixelFormats.Indexed8, palette, pixels, (int)info.Width);
}
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = (GfbMetaData)info;
BitmapPalette palette = null;
if (8 == meta.BPP && meta.DataOffset != 0x40)
{
stream.Position = 0x40;
palette = ReadPalette (stream, meta.DataOffset - 0x40);
}
stream.Position = meta.DataOffset;
byte[] pixels = new byte[meta.UnpackedSize];
if (0 != meta.PackedSize)
{
using (var lzss = new LzssStream (stream, LzssMode.Decompress, true))
lzss.Read (pixels, 0, pixels.Length);
}
else
stream.Read (pixels, 0, pixels.Length);
PixelFormat format;
switch (meta.BPP)
{
case 32:
if (HasAlphaChannel (pixels))
format = PixelFormats.Bgra32;
else
format = PixelFormats.Bgr32;
break;
case 24:
format = PixelFormats.Bgr24;
break;
case 16:
format = PixelFormats.Bgr565;
break;
case 8:
if (null != palette)
format = PixelFormats.Indexed8;
else
format = PixelFormats.Gray8;
break;
default:
throw new NotSupportedException ("Not supported GFB color depth");
}
int stride = pixels.Length / (int)info.Height;
return ImageData.CreateFlipped (info, format, palette, pixels, stride);
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = (PicMetaData)info;
stream.Position = meta.HeaderSize;
using (var input = new LzssStream (stream, LzssMode.Decompress, true))
{
BitmapPalette palette = null;
PixelFormat format;
if (8 == meta.BPP) // read palette
{
format = PixelFormats.Indexed8;
palette = ReadPalette (input);
}
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (16 == meta.BPP)
format = PixelFormats.Bgr565;
else
format = PixelFormats.Bgr32;
int stride = (int)meta.Width*((info.BPP+7)/8);
var pixels = new byte[stride*meta.Height];
input.Read (pixels, 0, pixels.Length);
if (32 == meta.BPP)
{
for (int i = 3; i < pixels.Length; i += 4)
{
if (0 != pixels[i])
{
format = PixelFormats.Bgra32;
break;
}
}
}
return ImageData.Create (meta, format, palette, pixels);
}
}
public byte[] Unpack()
{
if (0 == m_info.InnerWidth || 0 == m_info.InnerHeight)
return CreateBackground();
m_input.Position = 0x20;
int inner_stride = m_info.InnerWidth * m_pixel_size;
var pixels = new byte[m_info.InnerHeight * inner_stride];
using (var lz = new LzssStream (m_input, LzssMode.Decompress, true))
{
for (int pos = pixels.Length - inner_stride; pos >= 0; pos -= inner_stride)
{
if (inner_stride != lz.Read (pixels, pos, inner_stride))
throw new InvalidFormatException();
}
}
RestoreDelta (pixels, inner_stride);
if (m_info.InnerWidth == m_info.Width && m_info.InnerHeight == m_info.Height)
return pixels;
var image = CreateBackground();
int src = 0;
int dst = m_info.OffsetY * Stride + m_info.OffsetX * m_pixel_size;
for (int y = 0; y < m_info.InnerHeight; ++y)
{
Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
dst += Stride;
src += inner_stride;
}
return image;
}
public override ImageData Read(Stream stream, ImageMetaData info)
{
var meta = info as HizMetaData;
if (null == meta)
throw new ArgumentException ("HizFormat.Read should be supplied with HizMetaData", "info");
var pixels = new byte[meta.UnpackedSize];
stream.Position = meta.DataOffset;
using (var lzss = new LzssStream (stream, LzssMode.Decompress, true))
{
var channel = new byte[info.Width*info.Height];
for (int p = 0; p < 4; ++p)
{
if (channel.Length != lzss.Read (channel, 0, channel.Length))
throw new InvalidFormatException ("Unexpected end of file");
int src = 0;
for (int i = p; i < pixels.Length; i += 4)
pixels[i] = channel[src++];
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels);
}
}
bool ReadV1(Stream input)
{
// NOTE CryptoStream will close an input stream
using (var xored = new CryptoStream (input, new NotTransform(), CryptoStreamMode.Read))
using (var lzss = new LzssStream (xored))
lzss.Read (m_index, 0, m_index.Length);
int index_offset = Array.IndexOf (m_index, (byte)0);
if (-1 == index_offset || 0 == index_offset)
return false;
Password = m_index.Take (index_offset++).ToArray();
long base_offset = 0x20 + m_packed_size;
for (int i = 0; i < m_count; ++i)
{
var entry = new PackedEntry();
entry.Offset = LittleEndian.ToUInt32 (m_index, index_offset) + base_offset;
entry.Size = LittleEndian.ToUInt32 (m_index, index_offset + 4);
entry.UnpackedSize = LittleEndian.ToUInt32 (m_index, index_offset + 8);
entry.IsPacked = entry.UnpackedSize != 0;
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
int name_len = LittleEndian.ToInt32 (m_index, index_offset + 0xC);
entry.Name = Encodings.cp932.GetString (m_index, index_offset+0x18, name_len);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
m_dir.Value.Add (entry);
index_offset += 0x18 + name_len;
}
return true;
}
bool ReadV0(Stream input)
{
long current_offset = 0x20 + m_packed_size;
uint offset_table_size = (uint)m_count * 0x10;
if (offset_table_size > m_file.View.Reserve (current_offset, offset_table_size))
return false;
using (var lzss = new LzssStream (input, LzssMode.Decompress, true))
lzss.Read (m_index, 0, m_index.Length);
for (int i = 0; i < m_index.Length; ++i)
{
m_index[i] = (byte)(~m_index[i] - 5);
}
int index_offset = Array.IndexOf (m_index, (byte)0);
if (-1 == index_offset || 0 == index_offset)
return false;
index_offset++;
// Password = m_index.Take (index_offset++).ToArray();
for (int i = 0; i < m_count && index_offset < m_index.Length; ++i)
{
int name_end = Array.IndexOf (m_index, (byte)0, index_offset);
if (-1 == name_end)
name_end = m_index.Length;
if (index_offset == name_end)
return false;
var entry = new PackedEntry();
entry.Offset = m_file.View.ReadUInt32 (current_offset);
entry.Size = m_file.View.ReadUInt32 (current_offset+4);
entry.UnpackedSize = m_file.View.ReadUInt32 (current_offset+8);
entry.IsPacked = entry.UnpackedSize != 0;
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
entry.Name = Encodings.cp932.GetString (m_index, index_offset, name_end-index_offset);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
m_dir.Value.Add (entry);
index_offset = name_end+1;
current_offset += 0x10;
}
return true;
}
Stream OpenGpsStream(Stream input, byte compression, int unpacked_size)
{
if (0 == compression)
return new StreamRegion (input, 0x29, true);
else if (1 == compression)
return OpenRLEStream (input, unpacked_size);
else if (2 == compression)
return new LzssStream (input, LzssMode.Decompress, true);
else if (3 == compression)
{
using (var lzss = new LzssStream (input, LzssMode.Decompress, true))
return OpenRLEStream (lzss, unpacked_size);
}
else
throw new InvalidFormatException();
}
// Exile ~Blood Royal 2~ : flipped == true
// Gakuen ~Nerawareta Chitai~ : flipped == false
private ImageData ReadV3(bool flipped)
{
using (var lzs = new LzssStream (m_input, LzssMode.Decompress, true))
{
if (8 == m_info.BPP)
{
var palette_data = new byte[0x400];
if (palette_data.Length != lzs.Read (palette_data, 0, palette_data.Length))
throw new InvalidFormatException ("Unexpected end of file");
SetPalette (palette_data);
}
m_image_data = new byte[m_stride * (int)m_info.Height];
if (m_image_data.Length != lzs.Read (m_image_data, 0, m_image_data.Length))
throw new InvalidFormatException();
if (flipped)
return ImageData.CreateFlipped (m_info, Format, Palette, m_image_data, m_stride);
else
return ImageData.Create (m_info, Format, Palette, m_image_data, m_stride);
}
}
Stream OpenScript(EmeArchive arc, EmEntry entry)
{
var header = arc.File.View.ReadBytes (entry.Offset, 12);
Decrypt (header, 0, 12, arc.Key);
if (0 == entry.LzssFrameSize)
{
var input = arc.File.CreateStream (entry.Offset+12, entry.Size);
return new PrefixStream (header, input);
}
int unpacked_size = LittleEndian.ToInt32 (header, 4);
if (0 != unpacked_size)
{
uint packed_size = LittleEndian.ToUInt32 (header, 0);
int part1_size = (int)entry.UnpackedSize - unpacked_size;
var data = new byte[entry.UnpackedSize];
using (var input = arc.File.CreateStream (entry.Offset+12+packed_size, entry.Size))
using (var lzss = new LzssStream (input))
{
lzss.Config.FrameSize = entry.LzssFrameSize;
lzss.Config.FrameInitPos = entry.LzssInitPos;
lzss.Read (data, 0, part1_size);
}
using (var input = arc.File.CreateStream (entry.Offset+12, packed_size))
using (var lzss = new LzssStream (input))
{
lzss.Config.FrameSize = entry.LzssFrameSize;
lzss.Config.FrameInitPos = entry.LzssInitPos;
lzss.Read (data, part1_size, unpacked_size);
}
return new MemoryStream (data);
}
else
{
var input = arc.File.CreateStream (entry.Offset+12, entry.Size);
var lzss = new LzssStream (input);
lzss.Config.FrameSize = entry.LzssFrameSize;
lzss.Config.FrameInitPos = entry.LzssInitPos;
return lzss;
}
}
