GARbro-mirror/ArcFormats/Zyx/ImageSPL.cs

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2015-09-10 08:37:31 +08:00
//! \file ImageSPL.cs
//! \date Thu Sep 10 00:17:47 2015
//! \brief Zyx tiled image.
//
// Copyright (C) 2015 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.Zyx
{
internal class Tile
{
public int Left, Top;
public int Right, Bottom;
}
internal class SplMetaData : ImageMetaData
{
public Tile[] Tiles;
public long DataOffset;
}
[Export(typeof(ImageFormat))]
public class SplFormat : ImageFormat
{
public override string Tag { get { return "SPL"; } }
public override string Description { get { return "Zyx tiled image format"; } }
public override uint Signature { get { return 0; } }
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var reader = new ArcView.Reader (stream))
{
int count = reader.ReadInt16();
if (count <= 0)
return null;
var tiles = new Tile[count];
for (int i = 0; i < count; ++i)
{
var tile = new Tile();
tile.Left = reader.ReadInt16();
tile.Top = reader.ReadInt16();
if (tile.Left < 0 || tile.Top < 0)
return null;
tile.Right = reader.ReadInt16();
tile.Bottom = reader.ReadInt16();
if (tile.Right <= tile.Left || tile.Bottom <= tile.Top)
return null;
tiles[i] = tile;
}
int width = reader.ReadInt16();
int height = reader.ReadInt16();
if (width <= 0 || height <= 0)
return null;
foreach (var tile in tiles)
{
if (tile.Right > width || tile.Bottom > height)
return null;
}
return new SplMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = 24,
Tiles = tiles,
DataOffset = stream.Position,
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as SplMetaData;
if (null == meta)
throw new System.ArgumentException ("SplFormat.Read should be supplied with SplMetaData", "info");
var reader = new SplReader (stream, meta);
reader.Unpack ();
return ImageData.Create (info, PixelFormats.Bgr24, null, reader.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("SplFormat.Write not implemented");
}
}
internal class SplReader
{
Stream m_input;
byte[] m_output;
public byte[] Data { get { return m_output; } }
public SplReader (Stream input, SplMetaData info)
{
m_output = new byte[3 * info.Width * info.Height];
m_input = input;
m_input.Position = info.DataOffset;
}
public void Unpack ()
{
int dst = 0;
while (dst < m_output.Length)
{
int count;
int b = m_input.ReadByte();
if (-1 == b)
break;
switch (b)
{
case 0:
count = m_input.ReadByte();
if (count != -1)
{
byte p1 = m_output[dst - 3];
byte p2 = m_output[dst - 2];
byte p3 = m_output[dst - 1];
for (int i = 0; i < count; ++i)
{
m_output[dst++] = p1;
m_output[dst++] = p2;
m_output[dst++] = p3;
}
}
break;
case 1:
count = m_input.ReadByte();
b = m_input.ReadByte();
if (-1 != count && -1 != b)
{
int src = dst - 3 * b;
count *= 3;
Binary.CopyOverlapped (m_output, src, dst, count);
dst += count;
}
break;
case 2:
count = m_input.ReadByte();
b = ReadWord();
if (-1 != count && -1 != b)
{
int src = dst - 3 * b;
count *= 3;
Binary.CopyOverlapped (m_output, src, dst, count);
dst += count;
}
break;
case 3:
b = m_input.ReadByte();
if (b != -1)
{
int src = dst - 3 * b;
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
}
break;
case 4:
b = ReadWord();
if (b != -1)
{
int src = dst - 3 * b;
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
m_output[dst++] = m_output[src++];
}
break;
default:
count = 3 * (b - 4);
m_input.Read (m_output, dst, count);
dst += count;
break;
}
}
}
private int ReadWord ()
{
int lo = m_input.ReadByte();
if (-1 == lo)
return -1;
int hi = m_input.ReadByte();
if (-1 == hi)
return -1;
return hi << 8 | lo;
}
}
}