/**
* Load and parse Exif data.
*
* This will populate the object with Exif data, contained as a
* {@link PelTiff} object. This TIFF object can be accessed with
* the {@link getTiff()} method.
*
* @param PelDataWindow $d
*/
public function load(PelDataWindow $d)
{
Pel::debug('Parsing %d bytes of Exif data...', $d->getSize());
/* There must be at least 6 bytes for the Exif header. */
if ($d->getSize() < 6) {
throw new PelInvalidDataException('Expected at least 6 bytes of Exif ' . 'data, found just %d bytes.', $d->getSize());
}
/* Verify the Exif header */
if ($d->strcmp(0, self::EXIF_HEADER)) {
$d->setWindowStart(strlen(self::EXIF_HEADER));
} else {
throw new PelInvalidDataException('Exif header not found.');
}
/* The rest of the data is TIFF data. */
$this->tiff = new PelTiff();
$this->tiff->load($d);
}
print "Mandatory arguments:\n";
print " filename a JPEG or TIFF image.\n";
exit(1);
}
if (!is_readable($file)) {
printf("Unable to read %s!\n", $file);
exit(1);
}
/* We typically need lots of RAM to parse TIFF images since they tend
* to be big and uncompressed. */
ini_set('memory_limit', '32M');
$data = new PelDataWindow(file_get_contents($file));
if (PelJpeg::isValid($data)) {
$img = new PelJpeg();
} elseif (PelTiff::isValid($data)) {
$img = new PelTiff();
} else {
print "Unrecognized image format! The first 16 bytes follow:\n";
PelConvert::bytesToDump($data->getBytes(0, 16));
exit(1);
}
/* Try loading the data. */
$img->load($data);
print $img;
/* Deal with any exceptions: */
if (count(Pel::getExceptions()) > 0) {
print "\nThe following errors were encountered while loading the image:\n";
foreach (Pel::getExceptions() as $e) {
print "\n" . $e->__toString();
}
}
