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(Legacy): MG1 and MG2 images.

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morkt 2018-03-27 14:30:12 +04:00
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commit 2a0b730905
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Legacy/Mermaid/ImageMG1.cs Normal file
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//! \file ImageMG1.cs
//! \date 2018 Mar 19
//! \brief Mermaid obfuscated bitmap.
//
// 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
namespace GameRes.Formats.Mermaid
{
internal class MgMetaData : ImageMetaData
{
public uint ImageOffset;
public int TileCount;
}
#if DEBUG
[Export(typeof(ImageFormat))]
#endif
public class MgFormat : ImageFormat
{
public override string Tag { get { return "MG1"; } }
public override string Description { get { return "Mermaid obfuscated bitmap"; } }
public override uint Signature { get { return 0; } }
public MgFormat ()
{
Extensions = new string[] { "mg1", "mg2" };
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
if (!file.Name.HasAnyOfExtensions ("mg1", "mg2"))
return null;
var header = file.ReadHeader (0x36);
if (!header.AsciiEqual ("BM"))
return null;
int width = header.ToInt32 (0x12);
int tile_count = 5;
if (file.Name.HasExtension ("mg2"))
tile_count = width / 32;
return new MgMetaData {
Width = (uint)width,
Height = header.ToUInt32 (0x16),
BPP = header.ToInt16 (0x1C),
ImageOffset = header.ToUInt32 (0x0A),
TileCount = tile_count,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var meta = (MgMetaData)info;
PixelFormat format;
if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (32 == meta.BPP)
format = PixelFormats.Bgr32;
else
throw new InvalidFormatException();
int tile_count = meta.TileCount;
int stride = (int)meta.Width * ((meta.BPP + 7) / 8);
int height = (int)meta.Height;
int tile_width = stride / tile_count;
int tile_height = (height + tile_count - 1) / tile_count;
var pixels = new byte[stride * height];
int row_size = tile_height * stride;
file.Position = meta.ImageOffset;
for (int dst = row_size - stride; dst >= 0; dst -= stride)
{
for (int y = tile_count-1; y >= 0; --y)
{
int tile_dst = dst + y * tile_width;
for (int x = 0; x < tile_count; ++x)
{
if (tile_dst + tile_width > pixels.Length)
file.Seek (tile_width, SeekOrigin.Current);
else
file.Read (pixels, tile_dst, tile_width);
tile_dst += row_size;
}
}
}
return ImageData.Create (info, format, null, pixels, stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("MgFormat.Write not implemented");
}
}
}