public VtfResource(VtfResourceType type, uint data)
{
Type = type;
Data = data;
}
public VtfFile(Stream stream)
{
Header = new VtfHeader();
Resources = new List <VtfResource>();
Images = new List <VtfImage>();
using (BinaryReader br = new BinaryReader(stream))
{
string header = br.ReadFixedLengthString(Encoding.ASCII, 4);
if (header != VtfHeader)
{
throw new Exception("Invalid VTF header. Expected '" + VtfHeader + "', got '" + header + "'.");
}
uint v1 = br.ReadUInt32();
uint v2 = br.ReadUInt32();
decimal version = v1 + (v2 / 10m); // e.g. 7.3
Header.Version = version;
uint headerSize = br.ReadUInt32();
ushort width = br.ReadUInt16();
ushort height = br.ReadUInt16();
Header.Flags = (VtfImageFlag)br.ReadUInt32();
ushort numFrames = br.ReadUInt16();
ushort firstFrame = br.ReadUInt16();
br.ReadBytes(4); // padding
Header.Reflectivity = br.ReadVector3();
br.ReadBytes(4); // padding
Header.BumpmapScale = br.ReadSingle();
VtfImageFormat highResImageFormat = (VtfImageFormat)br.ReadUInt32();
byte mipmapCount = br.ReadByte();
VtfImageFormat lowResImageFormat = (VtfImageFormat)br.ReadUInt32();
byte lowResWidth = br.ReadByte();
byte lowResHeight = br.ReadByte();
ushort depth = 1;
uint numResources = 0;
if (version >= 7.2m)
{
depth = br.ReadUInt16();
}
if (version >= 7.3m)
{
br.ReadBytes(3);
numResources = br.ReadUInt32();
br.ReadBytes(8);
}
int faces = 1;
if (Header.Flags.HasFlag(VtfImageFlag.Envmap))
{
faces = version < 7.5m && firstFrame != 0xFFFF ? 7 : 6;
}
VtfImageFormatInfo highResFormatInfo = VtfImageFormatInfo.FromFormat(highResImageFormat);
VtfImageFormatInfo lowResFormatInfo = VtfImageFormatInfo.FromFormat(lowResImageFormat);
int thumbnailSize = lowResImageFormat == VtfImageFormat.None
? 0
: lowResFormatInfo.GetSize(lowResWidth, lowResHeight);
uint thumbnailPos = headerSize;
long dataPos = headerSize + thumbnailSize;
for (int i = 0; i < numResources; i++)
{
VtfResourceType type = (VtfResourceType)br.ReadUInt32();
uint data = br.ReadUInt32();
switch (type)
{
case VtfResourceType.LowResImage:
// Low res image
thumbnailPos = data;
break;
case VtfResourceType.Image:
// Regular image
dataPos = data;
break;
case VtfResourceType.Sheet:
case VtfResourceType.Crc:
case VtfResourceType.TextureLodSettings:
case VtfResourceType.TextureSettingsEx:
case VtfResourceType.KeyValueData:
// todo
Resources.Add(new VtfResource
{
Type = type,
Data = data
});
break;
default:
throw new ArgumentOutOfRangeException(nameof(type), (uint)type, "Unknown resource type");
}
}
if (lowResImageFormat != VtfImageFormat.None)
{
br.BaseStream.Position = thumbnailPos;
int thumbSize = lowResFormatInfo.GetSize(lowResWidth, lowResHeight);
LowResImage = new VtfImage
{
Format = lowResImageFormat,
Width = lowResWidth,
Height = lowResHeight,
Data = br.ReadBytes(thumbSize)
};
}
br.BaseStream.Position = dataPos;
for (int mip = mipmapCount - 1; mip >= 0; mip--)
{
for (int frame = 0; frame < numFrames; frame++)
{
for (int face = 0; face < faces; face++)
{
for (int slice = 0; slice < depth; slice++)
{
int wid = GetMipSize(width, mip);
int hei = GetMipSize(height, mip);
int size = highResFormatInfo.GetSize(wid, hei);
Images.Add(new VtfImage
{
Format = highResImageFormat,
Width = wid,
Height = hei,
Mipmap = mip,
Frame = frame,
Face = face,
Slice = slice,
Data = br.ReadBytes(size)
});
}
}
}
}
}
}
