public void Load(Stream stream)
{
// Read the first 4 bytes from the stream to determine
// what kind of image we are loading.
byte[] magic = new byte [4];
stream.Read(magic, 0, 4);
if (magic[0] == (byte) 'B' && magic[1] == (byte) 'M')
{
// Windows bitmap image.
BmpReader.Load(stream, this);
}
else if (magic[0] == 0 && magic[1] == 0 &&
magic[2] == 1 && magic[3] == 0)
{
// Windows icon image.
IconReader.Load(stream, this, false);
}
else if (magic[0] == 0 && magic[1] == 0 &&
magic[2] == 2 && magic[3] == 0)
{
// Windows cursor image (same as icon, with hotspots).
IconReader.Load(stream, this, true);
}
else if (magic[0] == 137 && magic[1] == 80 &&
magic[2] == 78 && magic[3] == 71)
{
// PNG image.
PngReader.Load(stream, this);
}
else if (magic[0] == (byte) 'G' && magic[1] == (byte) 'I' &&
magic[2] == (byte) 'F' && magic[3] == (byte) '8')
{
// GIF image.
GifReader.Load(stream, this);
}
else if (magic[0] == (byte) 0xFF && magic[1] == (byte) 0xD8)
{
// JPEG or EXIF image.
//JpegReader.Load(stream, this, magic, 4);
// TODO: implement JPEG reading
stream.Seek(0, SeekOrigin.Begin);
JpegReaderHelper.Load(stream, this);
}
else
{
// Don't know how to load this kind of file.
throw new FormatException();
}
}
