GARbro-mirror/ArcFormats/ImageDDS.cs

90 lines
3.6 KiB
C#

//! \file ImageDDS.cs
//! \date Thu Jul 23 18:12:05 2015
//! \brief Direct Draw Surface image format.
//
// 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.Microsoft
{
internal class DdsMetaData : ImageMetaData
{
public int DataOffset;
public uint PixelFlags;
}
[Export(typeof(ImageFormat))]
public class DdsFormat : ImageFormat
{
public override string Tag { get { return "DDS"; } }
public override string Description { get { return "Direct Draw Surface format"; } }
public override uint Signature { get { return 0x20534444; } } // 'DDS'
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x5C];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int dwSize = LittleEndian.ToInt32 (header, 4);
if (dwSize < 0x7C)
return null;
uint bitflag = LittleEndian.ToUInt32 (header, 0x50);
return new DdsMetaData
{
Width = LittleEndian.ToUInt32 (header, 0x10),
Height = LittleEndian.ToUInt32 (header, 0xC),
BPP = LittleEndian.ToInt32 (header, 0x58),
PixelFlags = LittleEndian.ToUInt32 (header, 0x50),
DataOffset = 4 + dwSize,
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as DdsMetaData;
if (null == meta)
throw new System.ArgumentException ("DdsFormat.Read should be supplied with DdsMetaData", "info");
stream.Position = meta.DataOffset;
PixelFormat format;
if (24 == info.BPP)
format = PixelFormats.Bgr24;
else if (1 == (meta.PixelFlags & 1))
format = PixelFormats.Bgra32;
else
format = PixelFormats.Bgr32;
var pixels = new byte[info.Width*info.Height*((format.BitsPerPixel+7)/8)];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
return ImageData.Create (info, format, null, pixels);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("DdsFormat.Write not implemented");
}
}
}