public DdsHeader(Stream s)
{
BinaryReader r = new BinaryReader(s);
// -- DWORD dwMagic --
magic = (DdsMagic)r.ReadUInt32();
if (!Enum.IsDefined(typeof(DdsMagic), magic))
throw new InvalidDataException(String.Format(
"DDS Magic Number invalid. Got 0x{0:X8}, expected 0x{1:X8} ('DDS '). At 0x{2:X8}."
, (uint)magic
, (uint)DdsMagic.dds_
, s.Position
)
);
// -- DDS_HEADER header --
size = r.ReadUInt32();
if (size == 0)
{
Console.WriteLine(String.Format(
"DDS Header Size is zero, expected 124. At 0x{0:X8}. Correcting..."
, s.Position
));
size = 124;
}
else if (size != 124)
throw new InvalidDataException(String.Format(
"DDS Header Size invalid. Got {0}, expected 124. At 0x{1:X8}."
, size
, s.Position
));
flags = (DdsFlags)r.ReadUInt32();
if (((uint)(flags & (writeFlags | DdsFlags.pitch | DdsFlags.linearSize))).Bits() != ((uint)writeFlags).Bits() + 1)
{
Console.WriteLine(String.Format(
"DDS Header Flags invalid. Got {0}, expected {1} and either _pitch or _linearSize. At 0x{2:X8}. Correcting..."
, flags
, writeFlags
, s.Position
));
flags |= writeFlags;
// We can't know yet which is best to pick of _pitch and _linearSize
}
height = r.ReadUInt32();
if (height == 0)
throw new InvalidDataException(String.Format(
"DDS Height invalid. Got 0, expected non-zero value. At 0x{1:X8}"
, s.Position
)
);
width = r.ReadUInt32();
if (width == 0)
throw new InvalidDataException(String.Format(
"DDS Width invalid. Got 0, expected non-zero value. At 0x{1:X8}"
, s.Position
)
);
pitchOrLinearSize = r.ReadUInt32();
depth = r.ReadUInt32();
if ((flags & DdsFlags.depth) != 0 && depth != 0)
{
Console.WriteLine(String.Format(
"Only simple DDS Textures are supported. This DDS has depth {0}. At 0x{1:X8}. Clearing flag and _depth to zero..."
, depth
, s.Position
));
flags &= ~DdsFlags.depth;
depth = 0;
}
if ((flags & DdsFlags.depth) != 0 || depth != 0)
{
Console.WriteLine(String.Format(
"DDS Header invalid. Inconsistent depth flag ({0}) and _depth ({1}). At 0x{2:X8}. Clearing flag and _depth to zero..."
, flags & DdsFlags.depth
, depth
, s.Position
));
flags &= ~DdsFlags.depth;
depth = 0;
}
numMipMaps = r.ReadUInt32();
if ((flags & DdsFlags.mipMapCount) != 0 && numMipMaps != 1)
{
Console.WriteLine(String.Format(
"Only simple DDS Textures are supported. This DDS has {0} mip maps. At 0x{1:X8}. Clearing flag and setting count to one..."
, numMipMaps
, s.Position
));
flags &= ~DdsFlags.mipMapCount;
numMipMaps = 1;
}
if ((flags & DdsFlags.mipMapCount) != 0 || numMipMaps == 0)
{
Console.WriteLine(String.Format(
"DDS Header invalid. Inconsistent mipMapCount flag ({0}) and _numMipMaps ({1}). At 0x{2:X8}. Clearing flag and setting count to one..."
, flags & DdsFlags.mipMapCount
, numMipMaps
, s.Position
));
flags &= ~DdsFlags.mipMapCount;
numMipMaps = 1;
}
for (int i = 0; i < reserved1.Length; i++) reserved1[i] = r.ReadUInt32();
for (int i = 0; i < reserved1.Length; i++) reserved1[i] = 0;
pixelFormat = new DdsPixelFormat(s);
var mask = (pixelFormat.FourCC == 0) ? DdsFlags.pitch : DdsFlags.linearSize;
var notMask = (pixelFormat.FourCC != 0) ? DdsFlags.pitch : DdsFlags.linearSize;
if ((flags & mask) == 0)
{
Console.WriteLine(String.Format(
"DDS Header Flags invalid. {0} not set. At 0x{1:X8}. Correcting..."
, mask
, s.Position
));
flags &= ~notMask;
flags |= mask;
}
surfaceCaps = (DdsSurfaceCaps)r.ReadUInt32();
if ((surfaceCaps & ~DdsSurfaceCaps.texture) != 0)
{
Console.WriteLine(String.Format(
"Only simple DDS Textures are supported. This DDS has other surface capabilities: {0}. At 0x{1:X8}. Clearing unsupported capabilities..."
, surfaceCaps
, s.Position
));
surfaceCaps &= DdsSurfaceCaps.texture;
}
if (surfaceCaps == 0)
{
Console.WriteLine(String.Format(
"DDS Header Surface Caps invalid. Got zero, expected texture. At 0x{0:X8}. Correcting..."
, s.Position
));
surfaceCaps |= DdsSurfaceCaps.texture;
}
cubeMapCaps = (DdsCubeMapCaps)r.ReadUInt32();
if (cubeMapCaps != 0)
{
Console.WriteLine(String.Format(
"Only simple DDS Textures are supported. This DDS has cube map capabilities: {0}. At 0x{1:X8}. Clearing unsupported capabilities..."
, cubeMapCaps
, s.Position
));
cubeMapCaps = 0;
}
unusedCaps3 = r.ReadUInt32();
unusedCaps4 = r.ReadUInt32();
reserved2 = r.ReadUInt32();
unusedCaps3 = unusedCaps4 = reserved2 = 0;
// -- DDS_HEADER_DX10 header10 -- Not Supported
}
uint reserved2;//124
#endregion
public DdsHeader(DdsFormat ddsFormat, int width, int height)
{
this.magic = DdsMagic.dds_;
this.size = 124;
//flags
this.height = (uint)height;
this.width = (uint)width;
//pitchOrLinearSize
this.depth = 0;
this.numMipMaps = 0;
for (int i = 0; i < reserved1.Length; i++) this.reserved1[i] = 0;
this.pixelFormat = new DdsPixelFormat(ddsFormat);
this.surfaceCaps = DdsSurfaceCaps.texture;
this.cubeMapCaps = 0;
this.unusedCaps3 = 0;
this.unusedCaps4 = 0;
this.reserved2 = 0;
this.flags = writeFlags | (IsBlockCompressed ? DdsFlags.linearSize : DdsFlags.pitch);
this.pitchOrLinearSize = IsBlockCompressed ? LinearSize : Pitch;
}
