GARbro-mirror/ArcFormats/ImageGS.cs
2015-04-16 22:41:34 +04:00

128 lines
4.9 KiB
C#

//! \file ImageGS.cs
//! \date Thu Apr 16 16:03:19 2015
//! \brief GsPack image format 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.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
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
}
public override ImageMetaData ReadMetaData (Stream stream)
{
using (var input = new ArcView.Reader (stream))
{
var info = new PicMetaData();
input.ReadUInt32();
info.PackedSize = input.ReadUInt32();
info.UnpackedSize = input.ReadUInt32();
info.HeaderSize = input.ReadUInt32();
input.ReadUInt32();
info.Width = input.ReadUInt32();
info.Height = input.ReadUInt32();
info.BPP = input.ReadInt32();
return info;
}
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as PicMetaData;
if (null == meta)
throw new ArgumentException ("PicFormat.Read should be supplied with PicMetaData", "info");
stream.Position = meta.HeaderSize;
using (var reader = new LzssReader (stream, (int)meta.PackedSize, (int)meta.UnpackedSize))
{
reader.Unpack();
byte[] pixels = reader.Data;
int stride = (int)meta.Width*((info.BPP+7)/8);
BitmapPalette palette = null;
PixelFormat format;
if (8 == meta.BPP) // read palette
{
format = PixelFormats.Indexed8;
var color_data = new Color[256];
for (int i = 0; i < 256; ++i)
color_data[i] = Color.FromRgb (pixels[i*4+2], pixels[i*4+1], pixels[i*4]);
palette = new BitmapPalette (color_data);
var image = new byte[meta.Width*meta.Height];
Buffer.BlockCopy (pixels, 0x400, image, 0, image.Length);
pixels = image;
}
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (16 == meta.BPP)
format = PixelFormats.Bgr565;
else
{
bool has_opaque = false;
for (int i = 3; i < pixels.Length; i += 4)
{
if (0 != pixels[i])
{
has_opaque = true;
break;
}
}
format = has_opaque ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
}
var bitmap = BitmapSource.Create ((int)meta.Width, (int)meta.Height, 96, 96,
format, palette, pixels, stride);
bitmap.Freeze();
return new ImageData (bitmap, meta);
}
}
public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("PicFormat.Write not implemented");
}
}
}