GARbro-mirror/ArcFormats/MnoViolet/ImageGRA.cs

112 lines
4.2 KiB
C#

//! \file ImageMNV.cs
//! \date Sat Apr 04 00:33:34 2015
//! \brief M no Violet engine images implementation.
//
// 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.Windows.Media;
using GameRes.Compression;
namespace GameRes.Formats.MnoViolet
{
internal class GraMetaData : ImageMetaData
{
public int PackedSize;
public int UnpackedSize;
public long DataOffset;
}
[Export(typeof(ImageFormat))]
public class GraFormat : ImageFormat
{
public override string Tag { get { return "GRA"; } }
public override string Description { get { return "M no Violet image format"; } }
public override uint Signature { get { return 0x00617267; } } // 'gra'
public GraFormat ()
{
Signatures = new uint[] { 0x00617267, 0x0073616d, 0 }; // 'gra', 'mas'
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("GraFormat.Write not implemented");
}
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
uint sign = input.ReadUInt32();
uint width = input.ReadUInt32();
uint height = input.ReadUInt32();
if (0 == width || width > 0x8000 || 0 == height || height > 0x8000)
return null;
int bpp;
if (0x617267 == sign) // 'gra'
bpp = 24;
else if (0x73616D == sign) // 'mas'
bpp = 8;
else if (1 == sign)
bpp = input.ReadInt32();
else
return null;
if (bpp != 32 && bpp != 24 && bpp != 8)
return null;
int packed_size = input.ReadInt32();
int data_size = input.ReadInt32();
return new GraMetaData
{
Width = width,
Height = height,
PackedSize = packed_size,
UnpackedSize = data_size,
BPP = bpp,
DataOffset = stream.Position,
};
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (GraMetaData)info;
stream.Position = meta.DataOffset;
using (var reader = new LzssReader (stream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
int stride = ((int)info.Width*info.BPP/8 + 3) & ~3;
PixelFormat format;
if (32 == info.BPP)
format = PixelFormats.Bgra32;
else if (24 == info.BPP)
format = PixelFormats.Bgr24;
else
format = PixelFormats.Gray8;
return ImageData.CreateFlipped (info, format, null, reader.Data, stride);
}
}
}
}