GARbro-mirror/ArcFormats/Pajamas/ImageEPA.cs

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//! \file ImageEPA.cs
//! \date Fri May 01 03:34:26 2015
//! \brief Pajamas Adventure System image format.
//
// 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;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Pajamas
{
internal class EpaMetaData : ImageMetaData
{
public int Mode;
public int ColorType;
}
[Export(typeof(ImageFormat))]
public class EpaFormat : ImageFormat
{
public override string Tag { get { return "EPA"; } }
public override string Description { get { return "Pajamas Adventure System image"; } }
public override uint Signature { get { return 0x01015045u; } } // 'EP'
public EpaFormat ()
{
Signatures = new uint[] { 0x01015045u, 0x02015045u };
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("EpaFormat.Write not implemented");
}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
{
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var info = new EpaMetaData();
info.Mode = file.ReadInt32() >> 24;
info.ColorType = file.ReadInt32() & 0xff;
switch (info.ColorType)
{
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case 0: info.BPP = 8; break;
case 1: info.BPP = 24; break;
case 2: info.BPP = 32; break;
case 3: info.BPP = 15; break;
case 4: info.BPP = 8; break;
default: return null;
}
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info.Width = file.ReadUInt32();
info.Height = file.ReadUInt32();
if (2 == info.Mode)
{
info.OffsetX = file.ReadInt32();
info.OffsetY = file.ReadInt32();
}
return info;
}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new Reader (file, (EpaMetaData)info);
reader.Unpack();
return ImageData.Create (info, reader.Format, reader.Palette, reader.Data);
}
internal class Reader
{
private IBinaryStream m_input;
private int m_start_pos;
private int m_width;
private int m_height;
private int m_pixel_size;
private byte[] m_output;
private bool m_has_alpha;
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public byte[] Data { get { return m_output; } }
public Reader (IBinaryStream stream, EpaMetaData info)
{
m_input = stream;
switch (info.ColorType)
{
case 0: m_pixel_size = 1; Format = PixelFormats.Indexed8; break;
case 1: m_pixel_size = 3; Format = PixelFormats.Bgr24; break;
case 2: m_pixel_size = 4; Format = PixelFormats.Bgra32; break;
case 3: m_pixel_size = 2; Format = PixelFormats.Bgr555; break;
case 4: m_pixel_size = 1; Format = PixelFormats.Bgra32; m_has_alpha = true; break;
default: throw new NotSupportedException ("Not supported EPA color depth");
}
m_width = (int)info.Width;
m_height = (int)info.Height;
m_output = new byte[info.Width*info.Height*m_pixel_size];
m_start_pos = 2 == info.Mode ? 0x18 : 0x10;
}
int[] m_offset_table = new int[16];
public void Unpack ()
{
m_input.Position = m_start_pos;
if (1 == m_pixel_size)
Palette = ImageFormat.ReadPalette (m_input.AsStream, 0x100, PaletteFormat.Bgr);
m_offset_table[0] = 0;
m_offset_table[1] = 1;
m_offset_table[2] = m_width;
m_offset_table[3] = m_width + 1;
m_offset_table[4] = 2;
m_offset_table[5] = m_width - 1;
m_offset_table[6] = m_width * 2;
m_offset_table[7] = 3;
m_offset_table[8] = (m_width + 1) * 2;
m_offset_table[9] = m_width + 2;
m_offset_table[10] = m_width * 2 + 1;
m_offset_table[11] = m_width * 2 - 1;
m_offset_table[12] = (m_width - 1) * 2;
m_offset_table[13] = m_width - 2;
m_offset_table[14] = m_width * 3;
m_offset_table[15] = 4;
UnpackChannel (m_output);
if (m_has_alpha)
{
var alpha = new byte[m_output.Length];
UnpackChannel (alpha);
var bitmap = new byte[m_width * m_height * 4];
int dst = 0;
for (int src = 0; src < m_output.Length; ++src)
{
var color = Palette.Colors[m_output[src]];
bitmap[dst++] = color.B;
bitmap[dst++] = color.G;
bitmap[dst++] = color.R;
bitmap[dst++] = alpha[src];
}
m_output = bitmap;
}
if (m_pixel_size > 1)
{
var bitmap = new byte[m_output.Length];
int stride = m_width * m_pixel_size;
int i = 0;
for (int p = 0; p < m_pixel_size; ++p)
{
for (int y = 0; y < m_height; ++y)
{
int pixel = y * stride + p;
for (int x = 0; x < m_width; ++x)
{
bitmap[pixel] = m_output[i++];
pixel += m_pixel_size;
}
}
}
m_output = bitmap;
}
}
void UnpackChannel (byte[] output)
{
int dst = 0;
while (dst < output.Length)
{
int count;
int flag = m_input.ReadUInt8();
if (0 == (flag & 0xF0))
{
count = flag;
if (dst + count > output.Length)
count = output.Length - dst;
if (count != m_input.Read (output, dst, count))
throw new InvalidFormatException ("Unexpected end of file");
}
else
{
if (0 != (flag & 8))
{
count = m_input.ReadUInt8();
count += (flag & 7) << 8;
}
else
count = flag & 7;
if (dst + count > output.Length)
break;
Binary.CopyOverlapped (output, dst-m_offset_table[flag >> 4], dst, count);
}
dst += count;
}
}
}
}
}