public static bool Save(DDSImage Image, string Filename, CompressionMode Format)
{
try
{
return Save(Image.Images[0], Filename, Format);
}
catch
{
return false;
}
}
public static bool Save(DDSImage Image, Stream Stream, CompressionMode Format)
{
try
{
return Save(Image.Images[0], Stream, Format);
}
catch
{
return false;
}
}
public static DDSImage Load(Stream Source)
{
DDSImage _dds = new DDSImage();
using (BinaryReader _data = new BinaryReader(Source))
{
if (_data.ReadInt32() != DDSImage.MAGIC_NUMBER)
{
throw new FileFormatException("DDSImage.Load() requires a .dds texture file stream");
}
_dds.Format = CompressionMode.Unknown;
_dds.Header.dwSize = _data.ReadInt32();
_dds.Header.dwFlags = _data.ReadInt32();
_dds.Header.dwHeight = _data.ReadInt32();
_dds.Header.dwWidth = _data.ReadInt32();
_dds.Header.dwPitchOrLinearSize = _data.ReadInt32();
_dds.Header.dwDepth = _data.ReadInt32();
_dds.Header.dwMipMapCount = _data.ReadInt32();
// Unused Reserved1 Fields
_data.ReadBytes(11 * sizeof(int));
// Image Pixel Format
_dds.PixelFormat.dwSize = _data.ReadUInt32();
_dds.PixelFormat.dwFlags = _data.ReadUInt32();
_dds.PixelFormat.dwFourCC = _data.ReadUInt32();
_dds.PixelFormat.dwRGBBitCount = _data.ReadUInt32();
_dds.PixelFormat.dwRBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwGBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwBBitMask = _data.ReadUInt32();
_dds.PixelFormat.dwABitMask = _data.ReadUInt32();
_dds.Header.dwCaps = _data.ReadInt32();
_dds.Header.dwCaps2 = _data.ReadInt32();
_dds.Header.dwCaps3 = _data.ReadInt32();
_dds.Header.dwCaps4 = _data.ReadInt32();
_dds.Header.dwReserved2 = _data.ReadInt32();
if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) != 0)
{
switch (_dds.PixelFormat.dwFourCC)
{
case FOURCC_DX10:
_dds.Format = CompressionMode.DX10;
throw new System.IO.FileFormatException("DX10 textures not supported at this time.");
case FOURCC_DXT1:
_dds.Format = CompressionMode.DXT1;
break;
case FOURCC_DXT2:
_dds.Format = CompressionMode.DXT2;
break;
case FOURCC_DXT3:
_dds.Format = CompressionMode.DXT3;
break;
case FOURCC_DXT4:
_dds.Format = CompressionMode.DXT4;
break;
case FOURCC_DXT5:
_dds.Format = CompressionMode.DXT5;
break;
default:
switch (_dds.PixelFormat.dwFourCC)
{
default:
break;
}
throw new System.IO.FileFormatException("Unsupported compression format");
}
}
if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) == 0)
{
// Uncompressed. How many BPP?
bool _supportedBpp = false;
switch (_dds.PixelFormat.dwRGBBitCount)
{
case 16:
if (_dds.PixelFormat.dwABitMask == 0)
{
_dds.Format = CompressionMode.R5G6B5;
}
else
{
_dds.Format = CompressionMode.A1R5G5B5;
}
_supportedBpp = true;
break;
case 24:
_dds.Format = CompressionMode.RGB24;
_supportedBpp = true;
break;
case 32:
_dds.Format = CompressionMode.RGB32;
_supportedBpp = true;
break;
}
if (!_supportedBpp)
{
throw new Exception("Only 16, 24, and 32-bit pixel formats are supported for uncompressed textures.");
}
}
_dds.MipMapCount = 1;
if ((_dds.Header.dwFlags & DDSD_MIPMAPCOUNT) != 0)
{
_dds.MipMapCount = (_dds.Header.dwMipMapCount == 0) ? 1 : _dds.Header.dwMipMapCount;
}
_dds.Images = new Bitmap[_dds.MipMapCount];
int _imageSize;
int _w = (_dds.Header.dwWidth < 0) ? -_dds.Header.dwWidth : _dds.Header.dwWidth;
int _h = (_dds.Header.dwHeight < 0) ? -_dds.Header.dwHeight : _dds.Header.dwHeight;
// DDS Documentation recommends ignoring the dwLinearOrPitchSize value and calculating on your own.
if ((_dds.PixelFormat.dwFlags & DDPF_RGB) != 0)
{
// Linear Size
_imageSize = (_w * _h * ((int)_dds.PixelFormat.dwRGBBitCount + 7) >> 3);
}
else
{
// Compressed
_imageSize = ((_w + 3) >> 2) * (((_h + 3) >> 2));
switch (_dds.PixelFormat.dwFourCC)
{
case FOURCC_DXT1:
_imageSize <<= 3; // 64 bits color per block
break;
case FOURCC_DXT2:
case FOURCC_DXT3:
_imageSize <<= 4; // 64 bits alpha + 64 bits color per block
break;
case FOURCC_DXT4:
case FOURCC_DXT5:
_imageSize <<= 4; // 64 bits alpha + 64 bits color per block
break;
}
}
byte[] _imageBits;
for (int _level = 0; _level < _dds.MipMapCount; _level++)
{
try
{
_imageBits = _data.ReadBytes(_imageSize >> (_level << 1));
int _w2 = _w >> _level;
int _h2 = _h >> _level;
uint _compressionMode = _dds.PixelFormat.dwFourCC;
if ((_dds.PixelFormat.dwFlags & DDPF_RGB) != 0)
{
_compressionMode = (uint)_dds.Format;
}
else if ((_dds.PixelFormat.dwFlags & DDPF_FOURCC) == 0 &&
_dds.PixelFormat.dwRGBBitCount == 16 &&
_dds.PixelFormat.dwRBitMask == 0x00FF &&
_dds.PixelFormat.dwGBitMask == 0xFF00 &&
_dds.PixelFormat.dwBBitMask == 0x0000 &&
_dds.PixelFormat.dwABitMask == 0x0000)
{
_dds.Format = CompressionMode.V8U8;
_compressionMode = FOURCC_V8U8;
}
_dds.Images[_level] = Decompress.Image(_imageBits, _w2, _h2, _compressionMode);
}
catch
{
// Unexpected end of file. Perhaps mipmaps weren't fully written to file.
// We'll at least provide them with what we've extracted so far.
_dds.MipMapCount = _level;
if (_level == 0)
{
_dds.Images = null;
throw new FileFormatException("Unable to read pixel data.");
}
else
{
Array.Resize<Bitmap>(ref _dds.Images, _level);
}
}
}
}
return _dds;
}
