/// <summary>
/// Construct PVRContainerV3 from byte array
/// </summary>
/// <param name="inputBytes">Byte array</param>
public PVRContainerV3(byte[] inputBytes)
{
if (inputBytes == null)
{
throw new NullReferenceException("inputBytes is null");
}
if (inputBytes.Length < PVRHeaderV3.headerSizeInBytes)
{
throw new ArgumentException($"Not enough data, at least {PVRHeaderV3.headerSizeInBytes} is needed, but only have {inputBytes.Length}");
}
this.headerV3 = new PVRHeaderV3(inputBytes);
this.metadataV3 = new PVRMetadataV3(inputBytes, 52, (int)this.headerV3.GetMetadataSizeInBytes());
this.textureData = new List <byte[]>();
int currentPos = 52 + (int)this.headerV3.GetMetadataSizeInBytes();
for (int i = 0; i < this.headerV3.GetMipMapCount(); i++)
{
int divisor = (int)Math.Pow(2, i);
int currentWidth = (int)this.headerV3.GetWidth() / divisor;
int currentHeight = (int)this.headerV3.GetHeight() / divisor;
int bytesForThisLevel = PVRHeaderV3.CalculateBytesOfData(this.headerV3.GetPixelFormat(), currentWidth, currentHeight);
byte[] byteArray = new byte[bytesForThisLevel];
Buffer.BlockCopy(inputBytes, currentPos, byteArray, 0, bytesForThisLevel);
this.textureData.Add(byteArray);
currentPos += bytesForThisLevel;
}
}
/// <summary>
/// Construct PVRContainerV3 from input stream
/// </summary>
/// <param name="inputStream">Input stream</param>
public PVRContainerV3(Stream inputStream)
{
if (inputStream == null)
{
throw new NullReferenceException("inputStream is null");
}
if (!inputStream.CanRead)
{
throw new ArgumentException("inputStream must be readable");
}
this.headerV3 = new PVRHeaderV3(inputStream);
this.metadataV3 = new PVRMetadataV3(inputStream, (int)this.headerV3.GetMetadataSizeInBytes());
this.textureData = new List <byte[]>();
for (int i = 0; i < this.headerV3.GetMipMapCount(); i++)
{
int divisor = (int)Math.Pow(2, i);
int currentWidth = (int)this.headerV3.GetWidth() / divisor;
int currentHeight = (int)this.headerV3.GetHeight() / divisor;
int bytesForThisLevel = PVRHeaderV3.CalculateBytesOfData(this.headerV3.GetPixelFormat(), currentWidth, currentHeight);
byte[] byteArray = new byte[bytesForThisLevel];
inputStream.Read(byteArray, 0, bytesForThisLevel);
this.textureData.Add(byteArray);
}
}
