public static KtxFile Load(Stream s, bool readKeyValuePairs)
{
using (BinaryReader br = new BinaryReader(s)) {
KtxHeader header = ReadStruct <KtxHeader>(br);
KtxKeyValuePair[] kvps = null;
if (readKeyValuePairs)
{
int keyValuePairBytesRead = 0;
List <KtxKeyValuePair> keyValuePairs = new List <KtxKeyValuePair>();
while (keyValuePairBytesRead < header.BytesOfKeyValueData)
{
int bytesRemaining = (int)(header.BytesOfKeyValueData - keyValuePairBytesRead);
KtxKeyValuePair kvp = ReadNextKeyValuePair(br, out int read);
keyValuePairBytesRead += read;
keyValuePairs.Add(kvp);
}
kvps = keyValuePairs.ToArray();
}
else
{
br.BaseStream.Seek(header.BytesOfKeyValueData, SeekOrigin.Current); // Skip over header data.
}
uint numberOfFaces = Math.Max(1, header.NumberOfFaces);
List <KtxFace> faces = new List <KtxFace>((int)numberOfFaces);
for (int i = 0; i < numberOfFaces; i++)
{
faces.Add(new KtxFace(header.NumberOfMipmapLevels));
}
for (uint mipLevel = 0; mipLevel < header.NumberOfMipmapLevels; mipLevel++)
{
uint imageSize = br.ReadUInt32();
// For cubemap textures, imageSize is actually the size of an individual face.
bool isCubemap = header.NumberOfFaces == 6 && header.NumberOfArrayElements == 0;
for (uint face = 0; face < numberOfFaces; face++)
{
byte[] faceData = br.ReadBytes((int)imageSize);
faces[(int)face].Mipmaps[mipLevel] = new KtxMipmap(imageSize, faceData, header.PixelWidth / (uint)(Math.Pow(2, mipLevel)), header.PixelHeight / (uint)(Math.Pow(2, mipLevel)));
uint cubePadding = 0u;
if (isCubemap)
{
cubePadding = 3 - ((imageSize + 3) % 4);
}
br.BaseStream.Seek(cubePadding, SeekOrigin.Current);
}
uint mipPaddingBytes = 3 - ((imageSize + 3) % 4);
br.BaseStream.Seek(mipPaddingBytes, SeekOrigin.Current);
}
return(new KtxFile(header, kvps, faces.ToArray()));
}
}
public KtxFile(KtxHeader header, KtxKeyValuePair[] keyValuePairs, KtxFace[] faces)
{
Header = header;
KeyValuePairs = keyValuePairs;
Faces = faces;
}
