GARbro-mirror/Legacy/Aquarium/ImageCP2.cs

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//! \file ImageCP2.cs
//! \date 2018 Sep 27
//! \brief Aquarium 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;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Aquarium
{
internal class Cp2MetaData : ImageMetaData
{
public int Flags;
public bool IsCompressed { get { return (Flags & 0x0F) != 0; } }
public bool HasAlpha { get { return (Flags & 0x20) != 0; } }
}
[Export(typeof(ImageFormat))]
public class Cp2Format : ImageFormat
{
public override string Tag { get { return "CP2"; } }
public override string Description { get { return "Aquarium image format"; } }
public override uint Signature { get { return 0x325043; } } // 'CP2'
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x20);
return new Cp2MetaData {
Width = header.ToUInt32 (4),
Height = header.ToUInt32 (8),
BPP = header.ToInt32 (0x0C),
Flags = header.ToInt32 (0x14),
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new Cp2Reader (file, (Cp2MetaData)info);
return reader.Unpack();
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("Cp2Format.Write not implemented");
}
}
internal class Cp2Reader
{
IBinaryStream m_input;
Cp2MetaData m_info;
byte[] m_output;
public BitmapPalette Palette { get; private set; }
public PixelFormat Format { get; private set; }
public int Stride { get; private set; }
public Cp2Reader (IBinaryStream input, Cp2MetaData info)
{
m_input = input;
m_info = info;
switch (info.BPP)
{
case 8: Format = PixelFormats.Indexed8; break;
case 24: Format = PixelFormats.Bgr24; break;
case 32: Format = PixelFormats.Bgr32; break;
default: throw new InvalidFormatException();
}
Stride = (((int)info.Width + 31) & ~31) * (info.BPP / 8);
m_output = new byte[Stride * (int)info.Height];
}
public ImageData Unpack ()
{
m_input.Position = 0x20;
if (8 == m_info.BPP)
Palette = ImageFormat.ReadPalette (m_input.AsStream);
if (m_info.IsCompressed)
DecompressLz (m_input, m_output);
else
m_input.Read (m_output, 0, m_output.Length);
if (m_info.HasAlpha)
{
int stride = Stride / (m_info.BPP / 8);
var alpha = new byte[stride * (int)m_info.Height];
if (m_info.IsCompressed)
DecompressLz (m_input, alpha);
else
m_input.Read (alpha, 0, alpha.Length);
return ApplyAlpha (alpha, stride);
}
return ImageData.CreateFlipped (m_info, Format, Palette, m_output, Stride);
}
ImageData ApplyAlpha (byte[] alpha, int alpha_stride)
{
int width = (int)m_info.Width;
int dst_stride = width * 4;
var pixels = new byte[dst_stride * (int)m_info.Height];
int src = m_output.Length - Stride;
int dst = 0;
int asrc = 0;
while (src >= 0)
{
int i = 0;
for (int x = 0; x < width; ++x)
{
if (8 == m_info.BPP)
{
var color = Palette.Colors[m_output[src+i++]];
pixels[dst++] = color.B;
pixels[dst++] = color.G;
pixels[dst++] = color.R;
}
else if (16 == m_info.BPP)
{
var color = m_output.ToUInt16 (src+i);
pixels[dst++] = (byte)((color & 0x1F) * 0xFF / 0x1F);
pixels[dst++] = (byte)(((color >> 5) & 0x1F) * 0xFF / 0x1F);
pixels[dst++] = (byte)(((color >> 10) & 0x1F) * 0xFF / 0x1F);
i += 2;
}
else
{
pixels[dst++] = m_output[src+i++];
pixels[dst++] = m_output[src+i++];
pixels[dst++] = m_output[src+i++];
}
pixels[dst++] = alpha[asrc+x];
}
src -= Stride;
asrc += alpha_stride;
}
return ImageData.Create (m_info, PixelFormats.Bgra32, null, pixels, dst_stride);
}
internal static void DecompressLz (IBinaryStream input, byte[] output)
{
int remaining = input.ReadInt32();
input.ReadInt32();
int dst = 0;
while (dst < output.Length && remaining > 0)
{
int b = input.ReadByte();
if (-1 == b)
break;
if (b != 0)
{
output[dst++] = (byte)b;
--remaining;
}
else
{
int count = input.ReadByte();
if (count != 0)
{
int offset = input.ReadUInt16();
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
remaining -= 4;
}
else
{
output[dst++] = 0;
remaining -= 2;
}
}
}
}
}
}