mirror of
https://github.com/crskycode/GARbro.git
synced 2024-12-24 20:04:13 +08:00
256 lines
8.6 KiB
C#
256 lines
8.6 KiB
C#
//! \file ImageSGF.cs
|
|
//! \date 2018 Jun 11
|
|
//! \brief Eternity engine image format.
|
|
//
|
|
// Copyright (C) 2018 by morkt
|
|
//
|
|
// 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.ComponentModel.Composition;
|
|
using System.IO;
|
|
using System.Windows.Media;
|
|
using GameRes.Utility;
|
|
|
|
namespace GameRes.Formats.Eternity
|
|
{
|
|
internal class SgfMetaData : ImageMetaData
|
|
{
|
|
public bool HasAlpha;
|
|
public int BlockSize;
|
|
public uint DataOffset;
|
|
public uint AlphaOffset;
|
|
}
|
|
|
|
[Export(typeof(ImageFormat))]
|
|
public class SgfFormat : ImageFormat
|
|
{
|
|
public override string Tag { get { return "SGF"; } }
|
|
public override string Description { get { return "Eternity engine image format"; } }
|
|
public override uint Signature { get { return 0x644753; } } // 'SG'
|
|
|
|
public SgfFormat ()
|
|
{
|
|
Signatures = new uint[] { 0x644753, 0 };
|
|
}
|
|
|
|
public override ImageMetaData ReadMetaData (IBinaryStream file)
|
|
{
|
|
var header = file.ReadHeader (0x20);
|
|
if (!header.AsciiEqual ("SG"))
|
|
return null;
|
|
int version = header.ToUInt16 (2);
|
|
if (version != 100)
|
|
return null;
|
|
return new SgfMetaData {
|
|
Width = header.ToUInt16 (4),
|
|
Height = header.ToUInt16 (6),
|
|
BPP = 24,
|
|
HasAlpha = header.ToInt32 (8) != 0,
|
|
BlockSize = header.ToUInt16 (0xC),
|
|
DataOffset = header.ToUInt32 (0x14),
|
|
AlphaOffset = header.ToUInt32 (0x1C),
|
|
};
|
|
}
|
|
|
|
public override ImageData Read (IBinaryStream file, ImageMetaData info)
|
|
{
|
|
var reader = new SgfReader (file, (SgfMetaData)info);
|
|
var pixels = reader.Unpack();
|
|
return ImageData.Create (info, reader.Format, null, pixels);
|
|
}
|
|
|
|
public override void Write (Stream file, ImageData image)
|
|
{
|
|
throw new System.NotImplementedException ("SgfFormat.Write not implemented");
|
|
}
|
|
}
|
|
|
|
internal class SgfReader
|
|
{
|
|
IBinaryStream m_input;
|
|
SgfMetaData m_info;
|
|
byte[] m_output;
|
|
|
|
public byte[] Data { get { return m_output; } }
|
|
public PixelFormat Format { get; private set; }
|
|
|
|
public SgfReader (IBinaryStream input, SgfMetaData info)
|
|
{
|
|
m_input = input;
|
|
m_info = info;
|
|
m_output = new byte[3 * info.Width * info.Height];
|
|
Format = PixelFormats.Bgr24;
|
|
}
|
|
|
|
public byte[] Unpack ()
|
|
{
|
|
long next_pos = m_info.DataOffset;
|
|
int height = (int)m_info.Height;
|
|
int dst = 0;
|
|
byte b = 0, g = 0, r = 0;
|
|
for (int y = 0; y < height; ++y)
|
|
{
|
|
int start_pos = dst;
|
|
if (0 == (y % m_info.BlockSize))
|
|
{
|
|
m_input.Position = next_pos;
|
|
next_pos += m_input.ReadUInt32();
|
|
b = m_input.ReadUInt8();
|
|
g = m_input.ReadUInt8();
|
|
r = m_input.ReadUInt8();
|
|
m_input.ReadUInt8();
|
|
mask1 = mask2 = mask3 = mask4 = mask5 = 1;
|
|
}
|
|
for (uint x = 0; x < m_info.Width; ++x)
|
|
{
|
|
b = GetNextByte (b);
|
|
g = GetNextByte (g);
|
|
r = GetNextByte (r);
|
|
m_output[dst++] = b;
|
|
m_output[dst++] = g;
|
|
m_output[dst++] = r;
|
|
}
|
|
b = m_output[start_pos];
|
|
g = m_output[start_pos+1];
|
|
r = m_output[start_pos+2];
|
|
}
|
|
if (m_info.HasAlpha)
|
|
{
|
|
var alpha = ReadAlpha();
|
|
if (alpha != null)
|
|
{
|
|
var pixels = new byte[m_info.iWidth * m_info.iHeight * 4];
|
|
dst = 0;
|
|
int p = 0;
|
|
int a = 0;
|
|
while (dst < pixels.Length)
|
|
{
|
|
pixels[dst++] = m_output[p++];
|
|
pixels[dst++] = m_output[p++];
|
|
pixels[dst++] = m_output[p++];
|
|
pixels[dst++] = alpha[a++];
|
|
}
|
|
m_output = pixels;
|
|
Format = PixelFormats.Bgra32;
|
|
}
|
|
}
|
|
return m_output;
|
|
}
|
|
|
|
byte[] ReadAlpha ()
|
|
{
|
|
m_input.Position = m_info.AlphaOffset;
|
|
var signature = m_input.ReadUInt16();
|
|
if (0x2041 == signature) // 'A '
|
|
return ReadASection();
|
|
else if (0x4D42 == signature) // 'BM'
|
|
return ReadBmpSection();
|
|
else
|
|
return null;
|
|
}
|
|
|
|
byte[] ReadASection ()
|
|
{
|
|
var alpha = new byte[m_info.iWidth * m_info.iHeight];
|
|
m_input.Position = m_info.AlphaOffset + 8;
|
|
int block_size = m_input.ReadUInt16();
|
|
m_input.Position = m_info.AlphaOffset + 0x10;
|
|
uint offset = m_input.ReadUInt32();
|
|
uint next_pos = m_info.AlphaOffset + offset;
|
|
int height = (int)m_info.Height;
|
|
int dst = alpha.Length - m_info.iWidth;
|
|
byte a = 0;
|
|
for (int y = 0; y < height; ++y)
|
|
{
|
|
int start_pos = dst;
|
|
if (0 == (y % block_size))
|
|
{
|
|
m_input.Position = next_pos;
|
|
next_pos += m_input.ReadUInt32();
|
|
a = (byte)m_input.ReadUInt32();
|
|
mask1 = mask2 = mask3 = mask4 = mask5 = 1;
|
|
}
|
|
for (uint x = 0; x < m_info.Width; ++x)
|
|
{
|
|
a = GetNextByte (a);
|
|
alpha[dst++] = a;
|
|
}
|
|
a = alpha[start_pos];
|
|
dst = start_pos - m_info.iWidth;
|
|
}
|
|
return alpha;
|
|
}
|
|
|
|
byte[] ReadBmpSection ()
|
|
{
|
|
// throw new NotImplementedException ("ReadBmpSection not implemented.");
|
|
return null;
|
|
}
|
|
|
|
uint mask1;
|
|
uint mask2;
|
|
uint mask3;
|
|
uint mask4;
|
|
uint mask5;
|
|
uint in1;
|
|
uint in2;
|
|
uint in3;
|
|
uint in4;
|
|
uint in5;
|
|
|
|
byte GetNextByte (byte prev)
|
|
{
|
|
if (mask1 == 1)
|
|
in1 = m_input.ReadUInt32();
|
|
if ((mask1 & in1) == 0)
|
|
{
|
|
if (mask2 == 1)
|
|
in2 = m_input.ReadUInt32();
|
|
if ((mask2 & in2) != 0)
|
|
{
|
|
if (mask3 == 1)
|
|
in3 = m_input.ReadUInt32();
|
|
if (mask4 == 1)
|
|
in4 = m_input.ReadUInt32();
|
|
uint diff = (in4 & 0xF) + 1;
|
|
if ((mask3 & in3) != 0)
|
|
prev -= (byte)diff;
|
|
else
|
|
prev += (byte)diff;
|
|
in4 >>= 4;
|
|
mask3 = Binary.RotL (mask3, 1);
|
|
mask4 = Binary.RotL (mask4, 4);
|
|
}
|
|
else
|
|
{
|
|
if (mask5 == 1)
|
|
in5 = m_input.ReadUInt32();
|
|
prev = (byte)in5;
|
|
in5 >>= 8;
|
|
mask5 = Binary.RotL (mask5, 8);
|
|
}
|
|
mask2 = Binary.RotL (mask2, 1);
|
|
}
|
|
mask1 = Binary.RotL (mask1, 1);
|
|
return prev;
|
|
}
|
|
}
|
|
}
|