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 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 numberOfMipmapLevels = Math.Max(1, header.NumberOfMipmapLevels);
uint numberOfArrayElements = Math.Max(1, header.NumberOfArrayElements);
uint numberOfFaces = Math.Max(1, header.NumberOfFaces);
uint baseWidth = Math.Max(1, header.PixelWidth);
uint baseHeight = Math.Max(1, header.PixelHeight);
uint baseDepth = Math.Max(1, header.PixelDepth);
KtxMipmapLevel[] images = new KtxMipmapLevel[numberOfMipmapLevels];
for (int mip = 0; mip < numberOfMipmapLevels; mip++)
{
uint mipWidth = Math.Max(1, baseWidth / (uint)(Math.Pow(2, mip)));
uint mipHeight = Math.Max(1, baseHeight / (uint)(Math.Pow(2, mip)));
uint mipDepth = Math.Max(1, baseDepth / (uint)(Math.Pow(2, mip)));
uint imageSize = br.ReadUInt32();
uint arrayElementSize = imageSize / numberOfArrayElements;
KtxArrayElement[] arrayElements = new KtxArrayElement[numberOfArrayElements];
for (int arr = 0; arr < numberOfArrayElements; arr++)
{
uint faceSize = arrayElementSize / numberOfFaces;
KtxFace[] faces = new KtxFace[numberOfFaces];
for (int face = 0; face < numberOfFaces; face++)
{
faces[face] = new KtxFace(br.ReadBytes((int)faceSize));
}
arrayElements[arr] = new KtxArrayElement(faces);
}
images[mip] = new KtxMipmapLevel(
mipWidth,
mipHeight,
mipDepth,
imageSize,
arrayElementSize,
arrayElements);
uint mipPaddingBytes = 3 - ((imageSize + 3) % 4);
br.BaseStream.Seek(mipPaddingBytes, SeekOrigin.Current);
}
return(new KtxFile(header, kvps, images));
}
}
