public static unsafe extern bool vlImageGetImageFormatInfoEx(ImageFormat imageFormat, out ImageFormatInfo imageFormatInfo);
public VTFFile(string filename, bool onlyHeaders = false)
{
using var reader = new BinaryReader(File.Open(filename, FileMode.Open));
var header = Encoding.ASCII.GetString(reader.ReadBytes(3));
if (header != VTFHeaderID)
{
throw new Exception("Invalid VTF header. Expected '" + VTFHeaderID + "', got '" + header + "'.");
}
if (reader.ReadByte() != 0)
{
throw new Exception();
}
var v1 = reader.ReadUInt32();
var v2 = reader.ReadUInt32();
var version = v1 + v2 / 10m; // e.g. 7.3
Header.Version = version;
var headerSize = reader.ReadUInt32();
Width = reader.ReadUInt16();
Height = reader.ReadUInt16();
Header.Flags = (ImageFlags)reader.ReadUInt32();
var numFrames = reader.ReadUInt16();
var firstFrame = reader.ReadUInt16();
reader.ReadBytes(4); // padding
Header.Reflectivity = new Vector(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
reader.ReadBytes(4); // padding
Header.BumpmapScale = reader.ReadSingle();
var highResImageFormat = (ImageFormat)reader.ReadUInt32();
var mipmapCount = reader.ReadByte();
var lowResImageFormat = (ImageFormat)reader.ReadUInt32();
var lowResWidth = reader.ReadByte();
var lowResHeight = reader.ReadByte();
ushort depth = 1;
uint numResources = 0;
if (version >= 7.2m)
{
depth = reader.ReadUInt16();
}
if (version >= 7.3m)
{
reader.ReadBytes(3);
numResources = reader.ReadUInt32();
reader.ReadBytes(8);
}
var faces = 1;
if (Header.Flags.HasFlag(ImageFlags.Envmap))
{
faces = version < 7.5m && firstFrame != 0xFFFF ? 7 : 6;
}
var highResFormatInfo = ImageFormatInfo.FromFormat(highResImageFormat);
Debug.Assert(highResFormatInfo != null);
var lowResFormatInfo = ImageFormatInfo.FromFormat(lowResImageFormat);
var thumbnailSize = lowResImageFormat == ImageFormat.None
? 0
: lowResFormatInfo !.GetDataSize(lowResWidth, lowResHeight);
var thumbnailPos = headerSize;
var dataPos = headerSize + thumbnailSize;
for (var i = 0; i < numResources; i++)
{
var type = (ResourceType)reader.ReadUInt32();
var data = reader.ReadUInt32();
switch (type)
{
case ResourceType.LowResImage:
// Low res image
thumbnailPos = data;
break;
case ResourceType.Image:
// Regular image
dataPos = data;
break;
case ResourceType.Sheet:
case ResourceType.Crc:
case ResourceType.TextureLodSettings:
case ResourceType.TextureSettingsEx:
case ResourceType.KeyValueData:
// todo
Resources.Add(new Resource
{
Type = type,
Data = data,
});
break;
default:
throw new ArgumentOutOfRangeException(nameof(type), (uint)type, "Unknown resource type");
}
}
if (lowResImageFormat != ImageFormat.None)
{
reader.BaseStream.Position = thumbnailPos;
var thumbSize = lowResFormatInfo !.GetDataSize(lowResWidth, lowResHeight);
LowResImage = new Image
{
Format = lowResImageFormat,
Width = lowResWidth,
Height = lowResHeight,
Data = reader.ReadBytes(thumbSize),
};
}
reader.BaseStream.Position = dataPos;
for (var mip = mipmapCount - 1; mip >= 0; mip--)
{
for (var frame = 0; frame < numFrames; frame++)
{
for (var face = 0; face < faces; face++)
{
for (var slice = 0; slice < depth; slice++)
{
var wid = GetMipSize(Width, mip);
var hei = GetMipSize(Height, mip);
var size = highResFormatInfo.GetDataSize(wid, hei);
Images.Add(new Image
{
Format = highResImageFormat,
Width = wid,
Height = hei,
Mipmap = mip,
Frame = frame,
Face = face,
Slice = slice,
Data = onlyHeaders ? null : reader.ReadBytes(size),
});
}
}
}
}
}
//
// Conversion routines.
//
public unsafe static bool vlImageGetImageFormatInfoEx(ImageFormat ImageFormat, out ImageFormatInfo ImageFormatInfo)
{
return IsWow64() ? x64.vlImageGetImageFormatInfoEx(ImageFormat, out ImageFormatInfo) : x86.vlImageGetImageFormatInfoEx(ImageFormat, out ImageFormatInfo);
}