/**
* Construct a new data window with the data supplied.
*
* @param
* mixed the data that this window will contain. This can
* either be given as a string (interpreted litteraly as a sequence
* of bytes) or a PHP image resource handle. The data will be copied
* into the new data window.
*
* @param
* boolean the initial byte order of the window. This must
* be either {@link PelConvert::LITTLE_ENDIAN} or {@link
* PelConvert::BIG_ENDIAN}. This will be used when integers are
* read from the data, and it can be changed later with {@link
* setByteOrder()}.
*/
public function __construct($data = '', $endianess = PelConvert::LITTLE_ENDIAN)
{
if (is_string($data)) {
$this->data = $data;
} elseif (is_resource($data) && get_resource_type($data) == 'gd') {
/*
* The ImageJpeg() function insists on printing the bytes
* instead of returning them in a more civil way as a string, so
* we have to buffer the output...
*/
ob_start();
ImageJpeg($data, null, Pel::getJPEGQuality());
$this->data = ob_get_clean();
} else {
throw new PelInvalidArgumentException('Bad type for $data: %s', gettype($data));
}
$this->order = $endianess;
$this->size = strlen($this->data);
}
