public static TextureCube DDSFromStreamEXT(
GraphicsDevice graphicsDevice,
Stream stream
)
{
TextureCube result;
// Begin BinaryReader, ignoring a tab!
using (BinaryReader reader = new BinaryReader(stream))
{
int width, height, levels;
SurfaceFormat format;
Texture.ParseDDS(
reader,
out format,
out width,
out height,
out levels
);
// Allocate/Load texture
result = new TextureCube(
graphicsDevice,
width,
levels > 1,
format
);
byte[] tex = null;
if (stream is MemoryStream &&
((MemoryStream)stream).TryGetBuffer(out tex))
{
for (int face = 0; face < 6; face += 1)
{
for (int i = 0; i < levels; i += 1)
{
int mipLevelSize = Texture.CalculateDDSLevelSize(
width >> i,
width >> i,
format
);
result.SetData(
(CubeMapFace)face,
i,
null,
tex,
(int)stream.Seek(0, SeekOrigin.Current),
mipLevelSize
);
stream.Seek(
mipLevelSize,
SeekOrigin.Current
);
}
}
}
else
{
for (int face = 0; face < 6; face += 1)
{
for (int i = 0; i < levels; i += 1)
{
tex = reader.ReadBytes(Texture.CalculateDDSLevelSize(
width >> i,
width >> i,
format
));
result.SetData(
(CubeMapFace)face,
i,
null,
tex,
0,
tex.Length
);
}
}
}
// End BinaryReader
}
// Finally.
return(result);
}
public static Texture2D DDSFromStreamEXT(
Stream stream
)
{
Texture2D result;
// Begin BinaryReader, ignoring a tab!
using (BinaryReader reader = new BinaryReader(stream))
{
int width, height, levels, levelSize, blockSize;
SurfaceFormat format;
Texture.ParseDDS(
reader,
out format,
out width,
out height,
out levels,
out levelSize,
out blockSize
);
// Allocate/Load texture
result = new Texture2D(
width,
height,
levels > 1,
format
);
byte[] tex = null;
if (stream is MemoryStream &&
((MemoryStream)stream).TryGetBuffer(out tex))
{
for (int i = 0; i < levels; i += 1)
{
result.SetData(
i,
null,
tex,
(int)stream.Seek(0, SeekOrigin.Current),
levelSize
);
stream.Seek(
levelSize,
SeekOrigin.Current
);
levelSize = Math.Max(
levelSize >> 2,
blockSize
);
}
}
else
{
for (int i = 0; i < levels; i += 1)
{
tex = reader.ReadBytes(levelSize);
result.SetData(
i,
null,
tex,
0,
tex.Length
);
levelSize = Math.Max(
levelSize >> 2,
blockSize
);
}
}
// End BinaryReader
}
// Finally.
return(result);
}
public static Texture2D DDSFromStreamEXT(
GraphicsDevice graphicsDevice,
Stream stream
)
{
Texture2D result;
// Begin BinaryReader, ignoring a tab!
using (BinaryReader reader = new BinaryReader(stream))
{
int width, height, levels;
bool isCube;
SurfaceFormat format;
Texture.ParseDDS(
reader,
out format,
out width,
out height,
out levels,
out isCube
);
if (isCube)
{
throw new FormatException("This file contains cube map data!");
}
// Allocate/Load texture
result = new Texture2D(
graphicsDevice,
width,
height,
levels > 1,
format
);
byte[] tex = null;
if (stream is MemoryStream &&
((MemoryStream)stream).TryGetBuffer(out tex))
{
for (int i = 0; i < levels; i += 1)
{
int levelSize = Texture.CalculateDDSLevelSize(
width >> i,
height >> i,
format
);
result.SetData(
i,
null,
tex,
(int)stream.Seek(0, SeekOrigin.Current),
levelSize
);
stream.Seek(
levelSize,
SeekOrigin.Current
);
}
}
else
{
for (int i = 0; i < levels; i += 1)
{
tex = reader.ReadBytes(Texture.CalculateDDSLevelSize(
width >> i,
height >> i,
format
));
result.SetData(
i,
null,
tex,
0,
tex.Length
);
}
}
// End BinaryReader
}
// Finally.
return(result);
}
