GARbro-mirror/ArcFormats/GsPack/ImageGS.cs

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//! \file ImageGS.cs
//! \date Thu Apr 16 16:03:19 2015
//! \brief GsPack image format implementation.
//
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// Copyright (C) 2015-2016 by morkt
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//
// 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Compression;
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using GameRes.Utility;
namespace GameRes.Formats.Gs
{
internal class PicMetaData : ImageMetaData
{
public uint PackedSize;
public uint UnpackedSize;
public uint HeaderSize;
}
[Export(typeof(ImageFormat))]
public class PicFormat : ImageFormat
{
public override string Tag { get { return "GsPIC"; } }
public override string Description { get { return "GsPack image format"; } }
public override uint Signature { get { return 0x00040000; } }
public PicFormat ()
{
Extensions = new string[] { "pic" }; // made-up
}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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file.Position = 4;
var info = new PicMetaData();
info.PackedSize = file.ReadUInt32();
info.UnpackedSize = file.ReadUInt32();
info.HeaderSize = file.ReadUInt32();
if (info.HeaderSize >= file.Length || info.PackedSize + info.HeaderSize > file.Length)
return null;
file.ReadUInt32();
info.Width = file.ReadUInt32();
info.Height = file.ReadUInt32();
info.BPP = file.ReadInt32();
if (info.HeaderSize >= 0x2C)
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{
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file.ReadInt32();
info.OffsetX = file.ReadInt32();
info.OffsetY = file.ReadInt32();
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}
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return info;
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var meta = (PicMetaData)info;
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file.Position = meta.HeaderSize;
using (var input = new LzssStream (file.AsStream, LzssMode.Decompress, true))
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{
BitmapPalette palette = null;
PixelFormat format;
if (8 == meta.BPP) // read palette
{
format = PixelFormats.Indexed8;
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palette = ReadPalette (input);
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}
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (16 == meta.BPP)
format = PixelFormats.Bgr565;
else
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format = PixelFormats.Bgr32;
int stride = (int)meta.Width*((info.BPP+7)/8);
var pixels = new byte[stride*meta.Height];
input.Read (pixels, 0, pixels.Length);
if (32 == meta.BPP)
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{
for (int i = 3; i < pixels.Length; i += 4)
{
if (0 != pixels[i])
{
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format = PixelFormats.Bgra32;
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break;
}
}
}
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return ImageData.Create (meta, format, palette, pixels);
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}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("PicFormat.Write not implemented");
}
}
}