2016-10-15 12:21:12 +04:00

210 lines
7.8 KiB
C#

//! \file ImagePX.cs
//! \date Thu Aug 18 05:35:34 2016
//! \brief Leaf image format.
//
// Copyright (C) 2016 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;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.Leaf
{
internal class PxMetaData : ImageMetaData
{
public int Type;
public int FrameCount;
public int BlockSize;
public int BlocksWidth;
public int BlocksHeight;
}
// XXX this format changes significantly from game to game
[Export(typeof(ImageFormat))]
public class PxFormat : ImageFormat
{
public override string Tag { get { return "PX"; } }
public override string Description { get { return "Leaf image format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
var header = stream.ReadHeader (0x20);
int type = header.ToUInt16 (0x10);
if (0x0C == type)
{
int count = header.ToInt32 (0);
if (!ArchiveFormat.IsSaneCount (count))
return null;
int block_size = header.ToInt32 (4);
if (block_size <= 0)
return null;
int bpp = header.ToUInt16 (0x12);
uint width = header.ToUInt16 (0x14);
uint height = header.ToUInt16 (0x16);
if (bpp != 32 || 0 == width || 0 == height)
return null;
return new PxMetaData
{
Width = width,
Height = height,
BPP = bpp,
Type = type,
FrameCount = count,
BlockSize = block_size,
BlocksWidth = header.ToUInt16 (0x1C),
BlocksHeight = header.ToUInt16 (0x1E),
};
}
else if (0x80 == type || 0x90 == type)
{
if (!header.AsciiEqual (0x14, "Leaf"))
return null;
int count = header.ToInt32 (4);
if (!ArchiveFormat.IsSaneCount (count))
return null;
var header_ex = stream.ReadBytes (0x20);
if (0x20 != header_ex.Length)
return null;
if (0x0A != LittleEndian.ToUInt16 (header_ex, 0x10))
return null;
return new PxMetaData
{
Width = LittleEndian.ToUInt32 (header_ex, 0),
Height = LittleEndian.ToUInt32 (header_ex, 0),
BPP = LittleEndian.ToUInt16 (header_ex, 0x12),
Type = type,
FrameCount = count,
};
}
return null;
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
using (var reader = new PxReader (stream, (PxMetaData)info))
{
var pixels = reader.Unpack();
return ImageData.Create (info, reader.Format, null, pixels, reader.Stride);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("PxFormat.Write not implemented");
}
}
internal sealed class PxReader : IDisposable
{
IBinaryStream m_input;
PxMetaData m_info;
byte[] m_output;
int m_pixel_size;
int m_stride;
public PixelFormat Format { get { return PixelFormats.Bgra32; } }
public byte[] Data { get { return m_output; } }
public int Stride { get { return m_stride; } }
public int FrameCount { get { return m_info.FrameCount; } }
public PxReader (IBinaryStream input, PxMetaData info)
{
m_input = input;
m_info = info;
m_pixel_size = m_info.BPP / 8;
m_stride = (int)m_info.Width * m_pixel_size;
m_output = new byte[m_stride * (int)m_info.Height];
}
public byte[] Unpack (int frame = 0)
{
if (frame < 0 || frame >= FrameCount)
throw new ArgumentException ("[PX] Invalid frame number", "frame");
switch (m_info.Type)
{
case 0x0C: Unpack0C (frame); break;
case 0x90: Unpack90 (frame); break;
case 0x80: Unpack80 (frame); break;
default: throw new NotImplementedException();
}
return m_output;
}
void Unpack0C (int frame)
{
int block_count = m_info.BlocksWidth * m_info.BlocksHeight;
var block_table = new ushort[block_count];
m_input.Position = 0x20 + frame * block_count * 2;
for (int i = 0; i < block_count; ++i)
block_table[i] = m_input.ReadUInt16();
int data_pos = 0x20 + FrameCount * block_count * 2;
int block_length = 2 + (m_info.BlockSize + 2) * (m_info.BlockSize + 2) * m_pixel_size;
int current_block = 0;
int dst_line = 0;
for (int by = 0; by < m_info.BlocksHeight; ++by)
{
for (int bx = 0; bx < m_info.BlocksWidth; ++bx)
{
int dst = dst_line + bx * m_info.BlockSize * m_pixel_size;
int block_num = block_table[current_block++];
if (block_num != 0)
{
m_input.Position = data_pos + (block_num - 1) * block_length;
int block_width = m_input.ReadByte() - 2;
int block_height = m_input.ReadByte() - 2;
int line_length = block_width * m_pixel_size;
for (int y = 0; y < block_height; ++y)
{
m_input.Read (m_output, dst, line_length);
dst += m_stride;
m_input.Seek (8, SeekOrigin.Current);
}
}
}
dst_line += m_info.BlockSize * m_stride;
}
}
void Unpack90 (int frame)
{
m_input.Position = 0x40 + frame * (0x20 + m_output.Length);
if (m_output.Length != m_input.Read (m_output, 0, m_output.Length))
throw new EndOfStreamException();
}
void Unpack80 (int frame)
{
throw new NotImplementedException();
}
#region IDisposable Members
public void Dispose ()
{
}
#endregion
}
}