/// <summary>
/// Returns the uncompressed image as a bytarray in the 32pppRGBA-Format
/// </summary>
private byte[] GetImageBytes(int w, int h, byte[] data)
{
byte[] pic;
switch (encoding)
{
case 1:
pic = GetPictureUncompressedByteArray(w, h, data);
break;
case 2:
var flag = (alphaDepth > 1)
? ((alphaEncoding == 7)
? (int)DXTDecompression.DXTFlags.DXT5
: (int)DXTDecompression.DXTFlags.DXT3)
: (int)DXTDecompression.DXTFlags.DXT1;
pic = DXTDecompression.DecompressImage(w, h, data, flag);
break;
case 3:
pic = data;
break;
default:
pic = new byte[0];
break;
}
return(pic);
}
/// <summary>
/// Returns the uncompressed image as a bytarray in the 32pppRGBA-Format
/// </summary>
private byte[] GetImageBytes(int w, int h, byte[] data)
{
switch (colorEncoding)
{
case 1:
return(GetPictureUncompressedByteArray(w, h, data));
case 2:
DXTDecompression.DXTFlags flag = (alphaDepth > 1) ? ((alphaEncoding == 7) ? DXTDecompression.DXTFlags.DXT5 : DXTDecompression.DXTFlags.DXT3) : DXTDecompression.DXTFlags.DXT1;
return(DXTDecompression.DecompressImage(w, h, data, flag));
case 3:
return(data);
default:
return(new byte[0]);
}
}
/// <summary>
/// Returns the uncompressed image as a byte array in the 32pppRGBA-Format
/// </summary>
private byte[] GetImageBytes(int w, int h, byte[] data)
{
switch (colorEncoding)
{
case BlpColorEncoding.Jpeg:
{
using (var img = SixLabors.ImageSharp.Image.Load <Rgba32>(data))
{
if (img.TryGetSinglePixelSpan(out var pixels))
{
return(MemoryMarshal.AsBytes(pixels).ToArray());
}
throw new Exception("img.TryGetSinglePixelSpan failed");
}
//using (var img = SixLabors.ImageSharp.Image.Load<Rgba32>(data))
//{
// var map = img.GetPixelSpan();
// byte[] rgba = new byte[width * height * 4];
// for (int i = 0; i < rgba.Length; i += 4)
// {
// rgba[i + 0] = map[i / 4].R;
// rgba[i + 1] = map[i / 4].G;
// rgba[i + 2] = map[i / 4].B;
// rgba[i + 3] = map[i / 4].A;
// }
// return rgba;
//}
}
case BlpColorEncoding.Palette:
return(GetPictureUncompressedByteArray(w, h, data));
case BlpColorEncoding.Dxt:
DXTDecompression.DXTFlags flag = (alphaSize > 1) ? ((preferredFormat == BlpPixelFormat.Dxt5) ? DXTDecompression.DXTFlags.DXT5 : DXTDecompression.DXTFlags.DXT3) : DXTDecompression.DXTFlags.DXT1;
return(DXTDecompression.DecompressImage(w, h, data, flag));
case BlpColorEncoding.Argb8888:
return(data);
default:
return(new byte[0]);
}
}
/// <summary>
/// Returns the uncompressed image as a bytarray in the 32pppRGBA-Format
/// </summary>
/// <param name="MipmapLevel">The desired Mipmap-Level. If the given level is invalid, the smallest available level is choosen</param>
/// <returns></returns>
public byte[] getImageBytes(int MipmapLevel)
{
byte[] pic;
if (this.encoding == 2)
{
// Determine the correct DXT-Format
int flag = (this.alphaDepth > 1) ? ((this.alphaEncoding == 7) ? (int)DXTDecompression.DXTFlags.DXT5 : (int)DXTDecompression.DXTFlags.DXT3) : (int)DXTDecompression.DXTFlags.DXT1;
// Decompress the picture
DXTDecompression.decompressImage(out pic, (this.width / (int)(Math.Pow(2, MipmapLevel))), (this.height / (int)(Math.Pow(2, MipmapLevel))), this.getPictureData(MipmapLevel), flag);
}
else
{
// Using the palette to determine the color
pic = this.getPictureUncompressedByteArray(MipmapLevel);
}
return(pic);
}
