/// <summary>
/// Internal function that loads an HPF image from a given data stream.
/// </summary>
/// <param name="stream">Data stream to read from.</param>
/// <returns>HPF image.</returns>
private static HPFImage LoadHPF(Stream stream)
{
// Create Reader from Stream
stream.Seek(0, SeekOrigin.Begin);
BinaryReader reader = new BinaryReader(stream);
#region Check HPF Signature
uint signature = reader.ReadUInt32();
reader.BaseStream.Seek(-4, SeekOrigin.Current);
if (signature != 0xFF02AA55)
{
throw new ArgumentException("Invalid file format, does not contain HPF signature bytes.");
}
#endregion
// Create HPF Image
HPFImage hpf = new HPFImage();
// Decompress HPF
byte[] hpfData = HPFCompression.Decompress(
reader.ReadBytes((int)reader.BaseStream.Length));
// Closer Reader
reader.Close();
#region Open Memory Stream and Reader
MemoryStream memStream = new MemoryStream(hpfData);
reader = new BinaryReader(memStream);
#endregion
// Get Header and Body Data
hpf.headerData = reader.ReadBytes(8);
hpf.rawData = reader.ReadBytes(hpfData.Length - 8);
reader.Close();
#region Get Dimensions
hpf.width = 28;
if (hpf.rawData.Length % hpf.width != 0)
{
throw new ArgumentException("HPF file does not use the standard 28 pixel width.");
}
hpf.height = hpf.rawData.Length / hpf.width;
#endregion
return(hpf);
}
public unsafe static Bitmap RenderImage(HPFImage hpf, Palette256 palette)
{
return(SimpleRender(hpf.Width, hpf.Height, hpf.RawData, palette, ImageType.HPF));
}