GARbro-mirror/ArcFormats/Sas5/ImageIAR.cs
2016-10-16 09:22:53 +04:00

129 lines
4.7 KiB
C#

//! \file ImageIAR.cs
//! \date Fri Oct 23 15:17:52 2015
//! \brief Intermediate image format representing IAR archives entries.
//
// 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 GameRes.Utility;
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace GameRes.Formats.Sas5
{
internal class IarMetaData : ImageMetaData
{
public int Stride;
public int PaletteSize;
public int ImageSize;
}
// This is an artificial format, used by GARbro internally. structure:
// 0x0000 'IAR\x00'
// 0x0004 'SAS5'
// 0x0008 Width
// 0x000C Height
// 0x0010 OffsetX
// 0x0014 OffsetY
// 0x0018 BPP
// 0x001C Stride
// 0x0020 PaletteSize
// 0x0024 ImageSize
// 0x0028 Palette [if PaletteSize > 0]
// ...... Image data
[Export(typeof(ImageFormat))]
public class IarFormat : ImageFormat
{
public override string Tag { get { return "IAR/IMAGE"; } }
public override string Description { get { return "SAS5 engine compressed image format"; } }
public override uint Signature { get { return 0x00524149; } } // 'IAR'
public IarFormat ()
{
Extensions = new string[] { "" };
}
public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
var header = stream.ReadHeader (0x28);
if (!header.AsciiEqual (4, "SAS5"))
return null;
return new IarMetaData
{
Width = header.ToUInt32 (0x08),
Height = header.ToUInt32 (0x0C),
OffsetX = -header.ToInt32 (0x10),
OffsetY = -header.ToInt32 (0x14),
BPP = header.ToInt32 (0x18),
Stride = header.ToInt32 (0x1C),
PaletteSize = header.ToInt32 (0x20),
ImageSize = header.ToInt32 (0x24),
};
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
var meta = (IarMetaData)info;
PixelFormat format;
if (32 == meta.BPP)
format = PixelFormats.Bgra32;
else if (24 == meta.BPP)
format = PixelFormats.Bgr24;
else if (0 == meta.PaletteSize)
format = PixelFormats.Gray8;
else
format = PixelFormats.Indexed8;
stream.Position = 0x28;
BitmapPalette palette = null;
if (meta.PaletteSize > 0)
palette = ReadPalette (stream.AsStream, meta.PaletteSize);
var pixels = stream.ReadBytes (meta.ImageSize);
return ImageData.Create (info, format, palette, pixels, meta.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("IarFormat.Write not implemented");
}
static BitmapPalette ReadPalette (Stream input, int palette_size)
{
var palette_data = new byte[palette_size];
if (palette_data.Length != input.Read (palette_data, 0, palette_data.Length))
throw new EndOfStreamException();
palette_size = Math.Min (0x400, palette_size);
int color_size = palette_size / 0x100;
var palette = new Color[0x100];
for (int i = 0; i < palette.Length; ++i)
{
int c = i * color_size;
palette[i] = Color.FromRgb (palette_data[c+2], palette_data[c+1], palette_data[c]);
}
return new BitmapPalette (palette);
}
}
}