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//! \file ImageGRP.cs
//! \date Wed Jun 24 22:14:41 2015
//! \brief Cherry Soft compressed image format.
//
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// Copyright (C) 2015-2019 by morkt
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//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Compression;
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namespace GameRes.Formats.Cherry
{
internal class GrpMetaData : ImageMetaData
{
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public int PackedSize;
public int UnpackedSize;
public int Offset;
public int HeaderSize;
public bool AlphaChannel;
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public bool IsEncrypted;
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}
[Export(typeof(ImageFormat))]
public class GrpFormat : ImageFormat
{
public override string Tag { get { return "GRP/CHERRY"; } }
public override string Description { get { return "Cherry Soft compressed image format"; } }
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public override uint Signature { get { return 0; } }
public GrpFormat ()
{
Extensions = new string[] { "grp" };
}
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x18);
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return UnpackHeader (header);
}
internal GrpMetaData UnpackHeader (CowArray<byte> header)
{
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uint width = header.ToUInt32 (0);
uint height = header.ToUInt32 (4);
int bpp = header.ToInt32 (8);
int packed_size = header.ToInt32 (0x0C);
int unpacked_size = header.ToInt32 (0x10);
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if (0 == width || 0 == height || width > 0x7fff || height > 0x7fff
|| (bpp != 24 && bpp != 8)
|| unpacked_size <= 0 || packed_size < 0)
return null;
return new GrpMetaData
{
Width = width,
Height = height,
BPP = bpp,
PackedSize = packed_size,
UnpackedSize = unpacked_size,
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Offset = header.ToInt32 (0x14),
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HeaderSize = 0x18,
AlphaChannel = false,
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};
}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var reader = new GrpReader (file.AsStream, (GrpMetaData)info);
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return reader.CreateImage();
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("GrpFormat.Write not implemented");
}
}
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[Export(typeof(ImageFormat))]
public class Grp3Format : GrpFormat
{
public override string Tag { get { return "GRP/CHERRY3"; } }
public override string Description { get { return "Cherry Soft compressed image format"; } }
public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x28);
if (0xFFFF != header.ToInt32 (8))
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return null;
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int packed_size = header.ToInt32 (0);
int unpacked_size = header.ToInt32 (4);
uint width = header.ToUInt32 (0x10);
uint height = header.ToUInt32 (0x14);
int bpp = header.ToInt32 (0x18);
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if (0 == width || 0 == height || width > 0x7fff || height > 0x7fff
|| (bpp != 32 && bpp != 24 && bpp != 8)
|| unpacked_size <= 0 || packed_size < 0)
return null;
return new GrpMetaData
{
Width = width,
Height = height,
BPP = bpp,
PackedSize = packed_size,
UnpackedSize = unpacked_size,
Offset = 0xFFFF,
HeaderSize = 0x28,
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AlphaChannel = header.ToInt32 (0x24) != 0,
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};
}
}
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[Export(typeof(ImageFormat))]
public class GrpEncFormat : GrpFormat
{
public override string Tag { get { return "GRP/ENC"; } }
public override string Description { get { return "Cherry Soft encrypted image format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x18);
if (header[3] != 0xA5 || header[7] != 0x35)
return null;
header[0] ^= 0x5A; // 0xA53CC35A
header[1] ^= 0xC3;
header[2] ^= 0x3C;
header[3] ^= 0xA5;
header[4] ^= 0x05; // 0x35421005
header[5] ^= 0x10;
header[6] ^= 0x42;
header[7] ^= 0x35;
header[0x10] ^= 0x5D; // 0xCF42355D
header[0x11] ^= 0x35;
header[0x12] ^= 0x42;
header[0x13] ^= 0xCF;
var info = UnpackHeader (header);
if (info != null)
info.IsEncrypted = true;
return info;
}
}
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internal class GrpReader
{
GrpMetaData m_info;
Stream m_input;
byte[] m_image_data;
int m_stride;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Pixels { get { return m_image_data; } }
public GrpReader (Stream input, GrpMetaData info)
{
m_info = info;
m_input = input;
if (8 == info.BPP)
Format = PixelFormats.Indexed8;
else if (24 == info.BPP)
Format = PixelFormats.Bgr24;
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else if (32 == info.BPP)
Format = m_info.AlphaChannel ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
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else
throw new NotSupportedException ("Not supported GRP image depth");
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m_stride = m_info.iWidth * ((Format.BitsPerPixel + 7) / 8);
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}
public ImageData CreateImage ()
{
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m_input.Position = m_info.HeaderSize;
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int data_size = m_info.UnpackedSize;
if (m_info.PackedSize != 0)
data_size = m_info.PackedSize;
if (0x0f0f0f0f == m_info.Offset && 0x18 + data_size == m_input.Length)
return ReadV2();
else if (8 == m_info.BPP && 0x418 == m_info.Offset ||
24 == m_info.BPP && 0x018 == m_info.Offset)
return ReadV1();
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else if (m_info.IsEncrypted)
return ReadEncrypted();
else if (true) // FIXME
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return ReadV3 (m_input, 0xFFFF != m_info.Offset);
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else
throw new InvalidFormatException();
}
private ImageData ReadV1 ()
{
if (8 == m_info.BPP)
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Palette = ImageFormat.ReadPalette (m_input);
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var packed = new byte[m_info.PackedSize];
if (packed.Length != m_input.Read (packed, 0, packed.Length))
throw new InvalidFormatException ("Unexpected end of file");
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for (int i = 0; i < packed.Length; ++i)
packed[i] ^= (byte)i;
using (var input = new MemoryStream (packed))
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using (var lzs = new LzssStream (input))
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{
m_image_data = new byte[m_info.UnpackedSize];
// flip pixels vertically
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for (int dst = m_stride * (m_info.iHeight-1); dst >= 0; dst -= m_stride)
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{
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lzs.Read (m_image_data, dst, m_stride);
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}
}
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return ImageData.Create (m_info, Format, Palette, m_image_data, m_stride);
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}
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// DOUBLE
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private ImageData ReadV2 ()
{
if (0 != m_info.PackedSize)
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return ReadV3 (m_input, true);
return ImageFromStream (m_input, true);
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}
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// Exile ~Blood Royal 2~ : flipped == true
// Gakuen ~Nerawareta Chitai~ : flipped == false
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private ImageData ReadV3 (Stream input, bool flipped)
{
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using (var lzs = new LzssStream (input, LzssMode.Decompress, true))
return ImageFromStream (lzs, flipped);
}
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private ImageData ImageFromStream (Stream input, bool flipped)
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{
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if (8 == m_info.BPP)
Palette = ImageFormat.ReadPalette (input);
m_image_data = new byte[m_stride * m_info.iHeight];
if (m_image_data.Length != input.Read (m_image_data, 0, m_image_data.Length))
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throw new InvalidFormatException();
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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);
}
private ImageData ReadEncrypted ()
{
var data = new byte[m_input.Length - m_info.HeaderSize];
m_input.Read (data, 0, data.Length);
Pak2Opener.Decrypt (data, 0, data.Length);
using (var input = new MemoryStream (data))
return ReadV3 (input, true);
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}
}
}