//http://wiki.xentax.com/index.php/Source_VTF
/// <summary>
/// Parser VTF format
/// <br>Supported versions: 7.1 - 7.5 (maybe 7.0)</br>
/// </summary>
/// <param name="stream">Stream of input file</param>
/// <param name="FileName">Name of input file (optional)</param>
public VTFFile(Stream stream, String FileName = "")
{
using (uReader FileStream = new uReader(stream))
{
String TempHeader = FileStream.ReadFixedLengthString(Encoding.ASCII, 4);
if (TempHeader != VTFHeader)
{
throw new Exception("Invalid VTF header. Expected '" + VTFHeader + "', got '" + TempHeader + "'.");
}
Header = new VTFHeader();
UInt32 VersionMajor = FileStream.ReadUInt32();
UInt32 VersionMinor = FileStream.ReadUInt32();
Decimal Version = VersionMajor + (VersionMinor / 10m); // e.g. 7.3
Header.Version = Version;
UInt32 headerSize = FileStream.ReadUInt32();
Width = FileStream.ReadUInt16();
Height = FileStream.ReadUInt16();
Header.Flags = (VTFImageFlag)FileStream.ReadUInt32();
UInt16 NumFrames = FileStream.ReadUInt16();
UInt16 FirstFrame = FileStream.ReadUInt16();
FileStream.ReadBytes(4); // padding
Header.Reflectivity = FileStream.ReadVector3D(false);
FileStream.ReadBytes(4); // padding
Header.BumpmapScale = FileStream.ReadSingle();
VTFImageFormat HighResImageFormat = (VTFImageFormat)FileStream.ReadUInt32();
Byte MipmapCount = FileStream.ReadByte();
VTFImageFormat LowResImageFormat = (VTFImageFormat)FileStream.ReadUInt32();
Byte LowResWidth = FileStream.ReadByte();
Byte LowResHeight = FileStream.ReadByte();
UInt16 Depth = 1;
UInt32 NumResources = 0;
if (Version >= 7.2m)
{
Depth = FileStream.ReadUInt16();
}
if (Version >= 7.3m)
{
FileStream.ReadBytes(3);
NumResources = FileStream.ReadUInt32();
FileStream.ReadBytes(8);
}
Int32 NumFaces = 1;
if (Header.Flags.HasFlag(VTFImageFlag.TEXTUREFLAGS_ENVMAP))
{
NumFaces = Version < 7.5m && FirstFrame != 0xFFFF ? 7 : 6;
}
VTFImageFormatInfo HighResFormatInfo = VTFImageFormatInfo.FromFormat(HighResImageFormat);
VTFImageFormatInfo LowResFormatInfo = VTFImageFormatInfo.FromFormat(LowResImageFormat);
Int32 ThumbnailSize = LowResImageFormat == VTFImageFormat.IMAGE_FORMAT_NONE ? 0 : LowResFormatInfo.GetSize(LowResWidth, LowResHeight);
UInt32 ThumbnailOffset = headerSize;
Int64 DataOffset = headerSize + ThumbnailSize;
Resources = new VTFResource[NumResources];
for (Int32 i = 0; i < NumResources; i++)
{
VTFResourceType type = (VTFResourceType)FileStream.ReadUInt32();
UInt32 DataSize = FileStream.ReadUInt32();
switch (type)
{
case VTFResourceType.LowResImage:
// Low res image
ThumbnailOffset = DataSize;
break;
case VTFResourceType.Image:
// Regular image
DataOffset = DataSize;
break;
case VTFResourceType.Sheet:
case VTFResourceType.CRC:
case VTFResourceType.TextureLodSettings:
case VTFResourceType.TextureSettingsEx:
case VTFResourceType.KeyValueData:
// todo
Resources[i] = new VTFResource
{
Type = type,
Data = DataSize
};
break;
default:
throw new ArgumentOutOfRangeException(nameof(type), (uint)type, "Unknown resource type");
}
}
if (LowResImageFormat != VTFImageFormat.IMAGE_FORMAT_NONE)
{
FileStream.BaseStream.Position = ThumbnailOffset;
Int32 thumbSize = LowResFormatInfo.GetSize(LowResWidth, LowResHeight);
LowResImage = new VTFImage
{
Format = LowResImageFormat,
Width = LowResWidth,
Height = LowResHeight,
Data = FileStream.ReadBytes(thumbSize)
};
}
Boolean ConvertToBGRA32 = true;
Boolean hasAlpha = true;
switch (HighResImageFormat)
{
//Unity support this formats natively
case VTFImageFormat.IMAGE_FORMAT_A8:
case VTFImageFormat.IMAGE_FORMAT_ABGR8888:
case VTFImageFormat.IMAGE_FORMAT_ARGB8888:
case VTFImageFormat.IMAGE_FORMAT_BGRA4444:
case VTFImageFormat.IMAGE_FORMAT_DXT1_ONEBITALPHA:
case VTFImageFormat.IMAGE_FORMAT_DXT3:
case VTFImageFormat.IMAGE_FORMAT_DXT5:
case VTFImageFormat.IMAGE_FORMAT_RGBA8888:
case VTFImageFormat.IMAGE_FORMAT_BGRA8888:
case VTFImageFormat.IMAGE_FORMAT_BGRX8888:
case VTFImageFormat.IMAGE_FORMAT_RGBA16161616F:
case VTFImageFormat.IMAGE_FORMAT_RGBA16161616:
ConvertToBGRA32 = false;
break;
case VTFImageFormat.IMAGE_FORMAT_BGR565:
case VTFImageFormat.IMAGE_FORMAT_RGB565:
case VTFImageFormat.IMAGE_FORMAT_DXT1:
case VTFImageFormat.IMAGE_FORMAT_RGB888:
hasAlpha = false;
ConvertToBGRA32 = false;
break;
}
FileStream.BaseStream.Position = DataOffset;
Frames = new Texture2D[NumFrames, NumFaces];
List <Byte>[] FramesData = new List <Byte> [NumFrames];
for (Int32 MipLevel = MipmapCount - 1; MipLevel >= 0; MipLevel--)
{
for (Int32 FrameID = 0; FrameID < NumFrames; FrameID++)
{
if (FramesData[FrameID] == null)
{
FramesData[FrameID] = new List <Byte>();
}
for (Int32 FaceID = 0; FaceID < NumFaces; FaceID++)
{
for (Int32 SliceID = 0; SliceID < Depth; SliceID++)
{
Int32 Wid = GetMipSize(Width, MipLevel);
Int32 Hei = GetMipSize(Height, MipLevel);
Int32 DataSize = HighResFormatInfo.GetSize(Wid, Hei);
if (ConvertToBGRA32)
{
FramesData[FrameID].InsertRange(0, VTFImageFormatInfo.FromFormat(HighResImageFormat).ConvertToBgra32(FileStream.ReadBytes(DataSize), Wid, Hei));
}
else
{
FramesData[FrameID].InsertRange(0, FileStream.ReadBytes(DataSize));
}
}
}
}
}
TextureFormat InternalFormat = TextureFormat.BGRA32;
Boolean needCompress = false;
switch (HighResImageFormat)
{
case VTFImageFormat.IMAGE_FORMAT_A8:
InternalFormat = TextureFormat.Alpha8;
break;
case VTFImageFormat.IMAGE_FORMAT_ABGR8888:
case VTFImageFormat.IMAGE_FORMAT_ARGB8888:
InternalFormat = TextureFormat.ARGB32;
break;
case VTFImageFormat.IMAGE_FORMAT_BGR565:
case VTFImageFormat.IMAGE_FORMAT_RGB565:
InternalFormat = TextureFormat.RGB565;
break;
case VTFImageFormat.IMAGE_FORMAT_BGRA4444:
InternalFormat = TextureFormat.RGBA4444;
break;
case VTFImageFormat.IMAGE_FORMAT_DXT1:
case VTFImageFormat.IMAGE_FORMAT_DXT1_ONEBITALPHA:
InternalFormat = TextureFormat.DXT1;
break;
case VTFImageFormat.IMAGE_FORMAT_DXT3:
case VTFImageFormat.IMAGE_FORMAT_DXT5:
InternalFormat = TextureFormat.DXT5;
break;
case VTFImageFormat.IMAGE_FORMAT_RGB888:
InternalFormat = TextureFormat.RGB24;
break;
case VTFImageFormat.IMAGE_FORMAT_RGBA8888:
InternalFormat = TextureFormat.RGBA32;
break;
case VTFImageFormat.IMAGE_FORMAT_RGBA16161616F:
case VTFImageFormat.IMAGE_FORMAT_RGBA16161616:
InternalFormat = TextureFormat.RGBAHalf;
break;
default:
//needCompress = true;
break;
}
Boolean mipmaps = MipmapCount > 1;
for (Int32 FrameID = 0; FrameID < NumFrames; FrameID++)
{
for (Int32 FaceID = 0; FaceID < NumFaces; FaceID++)
{
Frames[FrameID, FaceID] = new Texture2D(Width, Height, InternalFormat, mipmaps);
Frames[FrameID, FaceID].name = FileName;
Frames[FrameID, FaceID].alphaIsTransparency = hasAlpha;
Frames[FrameID, FaceID].LoadRawTextureData(FramesData[FrameID].ToArray());
Frames[FrameID, FaceID].Apply();
if (needCompress)
{
Frames[FrameID, FaceID].Compress(false);
Debug.LogWarning(FileName + " compressed!");
}
}
}
}
}
/// <summary>
/// Convert the native format data to a standard 32-bit bgra8888 format.
/// </summary>
/// <returns>The data in bgra8888 format.</returns>
public Byte[] GetBgra32Data()
{
return(VTFImageFormatInfo.FromFormat(Format).ConvertToBgra32(Data, Width, Height));
}