GARbro-mirror/Legacy/Nekotaro/ImageGCmp.cs

276 lines
9.7 KiB
C#
Raw Normal View History

//! \file ImageGCmp.cs
//! \date 2017 Dec 01
//! \brief Nekotaro Game System compressed image format.
//
// Copyright (C) 2017 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 System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Nekotaro
{
[Export(typeof(ImageFormat))]
public class GCmpFormat : ImageFormat
{
public override string Tag { get { return "GCMP"; } }
public override string Description { get { return "Nekotaro Game System image format"; } }
public override uint Signature { get { return 0x706D4347; } } // 'GCmp'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x10);
int bpp = header[12];
if (bpp != 24 && bpp != 8 && bpp != 1)
return null;
return new ImageMetaData {
Width = header.ToUInt16 (8),
Height = header.ToUInt16 (10),
BPP = bpp,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
using (var reader = new GCmpDecoder (file, info, this, true))
return reader.Image;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GCmpFormat.Write not implemented");
}
}
internal sealed class GCmpDecoder : IImageDecoder
{
IBinaryStream m_input;
ImageData m_image;
bool m_should_dispose;
public Stream Source { get { return m_input.AsStream; } }
public ImageFormat SourceFormat { get; private set; }
public ImageMetaData Info { get; private set; }
public PixelFormat Format { get; private set; }
public BitmapPalette Palette { get; private set; }
public int Stride { get; private set; }
public ImageData Image {
get {
if (null == m_image)
{
var pixels = Unpack();
m_image = ImageData.CreateFlipped (Info, Format, Palette, pixels, Stride);
}
return m_image;
}
}
public GCmpDecoder (IBinaryStream input, ImageMetaData info, ImageFormat source, bool leave_open = false)
{
m_input = input;
Info = info;
SourceFormat = source;
m_should_dispose = !leave_open;
if (info.BPP > 1)
Stride = (int)info.Width * info.BPP / 8;
else
Stride = ((int)info.Width + 7) / 8;
}
public byte[] Unpack ()
{
m_input.Position = 0x10;
if (24 == Info.BPP)
return Unpack24bpp();
else
return Unpack8bpp();
}
byte[] Unpack24bpp ()
{
Format = PixelFormats.Bgr24;
int pixel_count = (int)(Info.Width * Info.Height);
var output = new byte[pixel_count * Info.BPP / 8 + 1];
var frame = new byte[384];
int dst = 0;
int v19 = 0;
while (pixel_count > 0)
{
int count, frame_pos, pixel;
if (v19 != 0)
{
pixel = m_input.ReadInt24();
count = 1;
frame_pos = 127;
--v19;
}
else
{
count = m_input.ReadUInt8();
int lo = count & 0x1F;
if (0 != (count & 0x80))
{
count = ((byte)count >> 5) & 3;
if (count != 0)
{
frame_pos = lo;
}
else
{
count = lo << 1;
frame_pos = m_input.ReadUInt8();
if (0 != (frame_pos & 0x80))
++count;
frame_pos &= 0x7F;
}
if (0 == count)
{
count = m_input.ReadInt32();
}
int fpos = 3 * frame_pos;
pixel = frame[fpos] | frame[fpos+1] << 8 | frame[fpos+2] << 16;
}
else
{
if (1 == count)
{
v19 = m_input.ReadUInt8() - 1;
}
else if (0 == count)
{
count = m_input.ReadInt32();
}
pixel = m_input.ReadInt24();
frame_pos = 127;
}
}
if (count > pixel_count)
count = pixel_count;
pixel_count -= count;
LittleEndian.Pack (pixel, output, dst);
dst += 3;
if (--count > 0)
{
count *= 3;
Binary.CopyOverlapped (output, dst - 3, dst, count);
dst += count;
}
if (frame_pos != 0)
Buffer.BlockCopy (frame, 0, frame, 3, 3 * frame_pos);
frame[0] = (byte)pixel;
frame[1] = (byte)(pixel >> 8);
frame[2] = (byte)(pixel >> 16);
}
return output;
}
byte[] Unpack8bpp ()
{
Format = 8 == Info.BPP ? PixelFormats.Gray8 : PixelFormats.BlackWhite;
int pixel_count = (int)Info.Height * Stride;
var output = new byte[pixel_count];
int dst = 0;
byte[] frame = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0xFF };
int count = pixel_count;
int extra_count = pixel_count;
while (pixel_count > 0)
{
byte pixel;
int frame_pos;
byte ctl = m_input.ReadUInt8();
int hi = ctl >> 4;
int lo = ctl & 0xF;
if (hi != 0)
{
frame_pos = hi - 1;
pixel = frame[frame_pos];
count = lo + 1;
}
else
{
switch (lo)
{
default:
count = lo + 1;
break;
case 10:
count = m_input.ReadUInt8() + 11;
break;
case 11:
count = m_input.ReadUInt16() + 267;
break;
case 12:
count = m_input.ReadInt32() + 65803;
break;
case 13:
extra_count = 0x10;
count = m_input.ReadUInt8();
break;
case 14:
extra_count = 0x120;
count = m_input.ReadUInt16();
break;
case 15:
extra_count = 0x10130;
count = m_input.ReadInt32();
break;
}
pixel = m_input.ReadUInt8();
if (lo < 13)
{
frame_pos = 14;
}
else
{
lo = pixel & 0xF;
frame_pos = (pixel >> 4) - 1;
pixel = frame[frame_pos];
count = extra_count + 16 * count + lo + 1;
}
}
if (count > pixel_count)
count = pixel_count;
pixel_count -= count;
for (int i = 0; i < count; ++i)
output[dst++] = pixel;
Buffer.BlockCopy (frame, 0, frame, 1, frame_pos);
frame[0] = pixel;
}
return output;
}
bool m_disposed = false;
public void Dispose ()
{
if (!m_disposed && m_should_dispose)
{
m_input.Dispose();
m_disposed = true;
}
}
}
}