public static RawTextureInfo Read(byte[] data)
{
using (var ms = new MemoryStream(data))
{
using (var br = new BinaryReader(ms))
{
DDSHeaderStruct header = new DDSHeaderStruct();
if (ReadHeader(br, ref header))
{
RawTextureInfo info = new RawTextureInfo();
info.Width = (int)header.width;
info.Height = (int)header.height;
info.HasMips = header.mipmapcount > 1;
switch (header.pixelformat.fourcc)
{
case FOURCC_NO_COMPRESSION:
if (header.pixelformat.rgbbitcount == 8)
{
info.Format = TextureFormat.Alpha8;
}
else if (header.pixelformat.rgbbitcount == 32)
{
info.Format = TextureFormat.RGBA32;
}
else
{
Debug.LogError("Invalid texture format fourcc = " + header.pixelformat.fourcc + " rgbbitcount = " + header.pixelformat.rgbbitcount);
}
break;
case FOURCC_DXT1:
info.Format = TextureFormat.DXT1;
break;
case FOURCC_DXT5:
info.Format = TextureFormat.DXT5;
break;
default:
Debug.LogError("Unrecognized texture format fourcc = " + header.pixelformat.fourcc);
break;
}
info.RawData = new byte[ms.Length - ms.Position];
ms.Read(info.RawData, 0, info.RawData.Length);
return(info);
}
}
}
return(null);
}
private static bool ReadHeader(BinaryReader reader, ref DDSHeaderStruct header)
{
byte[] signature = reader.ReadBytes(4);
if (!(signature[0] == 'D' && signature[1] == 'D' && signature[2] == 'S' && signature[3] == ' '))
{
return(false);
}
header.size = reader.ReadUInt32();
if (header.size != 124)
{
return(false);
}
//convert the data
header.flags = reader.ReadUInt32();
header.height = reader.ReadUInt32();
header.width = reader.ReadUInt32();
header.sizeorpitch = reader.ReadUInt32();
header.depth = reader.ReadUInt32();
header.mipmapcount = reader.ReadUInt32();
header.alphabitdepth = reader.ReadUInt32();
header.reserved = new uint[10];
for (int i = 0; i < 10; i++)
{
header.reserved[i] = reader.ReadUInt32();
}
//pixelfromat
header.pixelformat.size = reader.ReadUInt32();
header.pixelformat.flags = reader.ReadUInt32();
header.pixelformat.fourcc = reader.ReadUInt32();
header.pixelformat.rgbbitcount = reader.ReadUInt32();
header.pixelformat.rbitmask = reader.ReadUInt32();
header.pixelformat.gbitmask = reader.ReadUInt32();
header.pixelformat.bbitmask = reader.ReadUInt32();
header.pixelformat.alphabitmask = reader.ReadUInt32();
//caps
header.ddscaps.caps1 = reader.ReadUInt32();
header.ddscaps.caps2 = reader.ReadUInt32();
header.ddscaps.caps3 = reader.ReadUInt32();
header.ddscaps.caps4 = reader.ReadUInt32();
header.texturestage = reader.ReadUInt32();
return(true);
}
