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(DdsFormat): thorw exceptions for non-supported formats.

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morkt 2016-03-12 12:47:40 +04:00
parent 0600805f06
commit ff7669f745
1 changed files with 32 additions and 10 deletions
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42
ArcFormats/ImageDDS.cs
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@ -2,7 +2,7 @@
//! \date Thu Jul 23 18:12:05 2015
//! \brief Direct Draw Surface image format.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2016 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
@ -23,8 +23,10 @@
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using System.Windows.Media;
using GameRes.Utility;
@ -32,8 +34,20 @@ namespace GameRes.Formats.Microsoft
{
internal class DdsMetaData : ImageMetaData
{
public int DataOffset;
public uint PixelFlags;
public int DataOffset;
public DdsPF PixelFlags;
public string FourCC;
}
[Flags]
internal enum DdsPF : uint
{
AlphaPixels = 1,
Alpha = 2,
FourCC = 4,
Rgb = 0x40,
Yuv = 0x200,
Luminance = 0x20000,
}
[Export(typeof(ImageFormat))]
@ -51,30 +65,38 @@ namespace GameRes.Formats.Microsoft
int dwSize = LittleEndian.ToInt32 (header, 4);
if (dwSize < 0x7C)
return null;
uint bitflag = LittleEndian.ToUInt32 (header, 0x50);
var bitflags = (DdsPF)LittleEndian.ToUInt32 (header, 0x50);
string four_cc = null;
if (bitflags.HasFlag (DdsPF.FourCC))
four_cc = Binary.GetCString (header, 0x54, 4, Encoding.ASCII);
return new DdsMetaData
{
Width = LittleEndian.ToUInt32 (header, 0x10),
Height = LittleEndian.ToUInt32 (header, 0xC),
BPP = LittleEndian.ToInt32 (header, 0x58),
PixelFlags = LittleEndian.ToUInt32 (header, 0x50),
PixelFlags = bitflags,
FourCC = four_cc,
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;
var meta = (DdsMetaData)info;
if (meta.PixelFlags.HasFlag (DdsPF.Yuv | DdsPF.Luminance))
throw new NotSupportedException ("Not supported DDS texture color format");
if (!string.IsNullOrEmpty (meta.FourCC))
throw new NotImplementedException ("Compressed DDS textures not implemented");
PixelFormat format;
if (24 == info.BPP)
format = PixelFormats.Bgr24;
else if (1 == (meta.PixelFlags & 1))
else if (16 == info.BPP)
throw new NotImplementedException ("16bpp DDS textures not implemented");
else if (meta.PixelFlags.HasFlag (DdsPF.AlphaPixels))
format = PixelFormats.Bgra32;
else
format = PixelFormats.Bgr32;
stream.Position = meta.DataOffset;
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");