/**
* Add GPS information to an image basic metadata. Any old Exif data
* is discarded.
*
* @param string the input filename.
*
* @param string the output filename. An updated copy of the input
* image is saved here.
*
* @param string image description.
*
* @param string user comment.
*
* @param string camera model.
*
* @param float longitude expressed as a fractional number of degrees,
* e.g. 12.345°. Negative values denotes degrees west of Greenwich.
*
* @param float latitude expressed as for longitude. Negative values
* denote degrees south of equator.
*
* @param float the altitude, negative values express an altitude
* below sea level.
*
* @param string the date and time.
*/
function addGpsInfo($input, $output, $description, $comment, $model, $longitude, $latitude, $altitude, $date_time)
{
/* Load the given image into a PelJpeg object */
$jpeg = new PelJpeg($input);
/* Create and add empty Exif data to the image (this throws away any
* old Exif data in the image). */
$exif = new PelExif();
$jpeg->setExif($exif);
/* Create and add TIFF data to the Exif data (Exif data is actually
* stored in a TIFF format). */
$tiff = new PelTiff();
$exif->setTiff($tiff);
/* Create first Image File Directory and associate it with the TIFF
* data. */
$ifd0 = new PelIfd(PelIfd::IFD0);
$tiff->setIfd($ifd0);
/* Create a sub-IFD for holding GPS information. GPS data must be
* below the first IFD. */
$gps_ifd = new PelIfd(PelIfd::GPS);
$ifd0->addSubIfd($gps_ifd);
/* The USER_COMMENT tag must be put in a Exif sub-IFD under the
* first IFD. */
$exif_ifd = new PelIfd(PelIfd::EXIF);
$exif_ifd->addEntry(new PelEntryUserComment($comment));
$ifd0->addSubIfd($exif_ifd);
$inter_ifd = new PelIfd(PelIfd::INTEROPERABILITY);
$ifd0->addSubIfd($inter_ifd);
$ifd0->addEntry(new PelEntryAscii(PelTag::MODEL, $model));
$ifd0->addEntry(new PelEntryAscii(PelTag::DATE_TIME, $date_time));
$ifd0->addEntry(new PelEntryAscii(PelTag::IMAGE_DESCRIPTION, $description));
$gps_ifd->addEntry(new PelEntryByte(PelTag::GPS_VERSION_ID, 2, 2, 0, 0));
/* Use the convertDecimalToDMS function to convert the latitude from
* something like 12.34° to 12° 20' 42" */
list($hours, $minutes, $seconds) = convertDecimalToDMS($latitude);
/* We interpret a negative latitude as being south. */
$latitude_ref = $latitude < 0 ? 'S' : 'N';
$gps_ifd->addEntry(new PelEntryAscii(PelTag::GPS_LATITUDE_REF, $latitude_ref));
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_LATITUDE, $hours, $minutes, $seconds));
/* The longitude works like the latitude. */
list($hours, $minutes, $seconds) = convertDecimalToDMS($longitude);
$longitude_ref = $longitude < 0 ? 'W' : 'E';
$gps_ifd->addEntry(new PelEntryAscii(PelTag::GPS_LONGITUDE_REF, $longitude_ref));
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_LONGITUDE, $hours, $minutes, $seconds));
/* Add the altitude. The absolute value is stored here, the sign is
* stored in the GPS_ALTITUDE_REF tag below. */
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_ALTITUDE, array(abs($altitude), 1)));
/* The reference is set to 1 (true) if the altitude is below sea
* level, or 0 (false) otherwise. */
$gps_ifd->addEntry(new PelEntryByte(PelTag::GPS_ALTITUDE_REF, (int) ($altitude < 0)));
/* Finally we store the data in the output file. */
file_put_contents($output, $jpeg->getBytes());
}
function testIteratorAggretate()
{
$ifd = new PelIfd(PelIfd::IFD0);
$this->assertEqual(sizeof($ifd->getIterator()), 0);
$desc = new PelEntryAscii(PelTag::IMAGE_DESCRIPTION, 'Hello?');
$date = new PelEntryTime(PelTag::DATE_TIME, 12345678);
$ifd->addEntry($desc);
$ifd->addEntry($date);
$this->assertEqual(sizeof($ifd->getIterator()), 2);
$entries = array();
foreach ($ifd as $tag => $entry) {
$entries[$tag] = $entry;
}
$this->assertIdentical($entries[PelTag::IMAGE_DESCRIPTION], $desc);
$this->assertIdentical($entries[PelTag::DATE_TIME], $date);
}
function addGPSdata($infile, $outfile, $GPS_lat, $GPS_lon, $GPS_alt)
{
try {
$image = new PelJpeg($infile);
} catch (Exception $exc) {
return -1;
}
if ($image instanceof PelJpeg) {
if ($image->isValid(new PelDataWindow($image->getBytes()))) {
$exif = $image->getExif();
if ($exif == null) {
$exif = new PelExif();
$image->setExif($exif);
$exif->setTiff(new PelTiff());
}
$tiff = $exif->getTiff();
$ifd0 = $tiff->getIfd();
if ($ifd0 == null) {
$ifd0 = new PelIFD(PelIfd::IFD0);
$tiff->setIfd($ifd0);
}
/* Tags erzeugen */
$subifd = new PelIfd(PelIfd::GPS);
$GPS_latref = $GPS_lat < 0 ? "S" : "N";
$GPS_lonref = $GPS_lon < 0 ? "W" : "E";
$GPS_altref = $GPS_alt < 0 ? 1 : 0;
list($degrees, $minutes, $milliseconds) = dec2dms(abs($GPS_lat));
$gpslat = new PelEntryRational(PelTag::GPS_LATITUDE, array($degrees, 1), array($minutes, 1), array($milliseconds, 1000));
list($degrees, $minutes, $milliseconds) = dec2dms(abs($GPS_lon));
$gpslon = new PelEntryRational(PelTag::GPS_LONGITUDE, array($degrees, 1), array($minutes, 1), array($milliseconds, 1000));
echo $GPS_alt * 1000;
$gpsalt = new PelEntryRational(PelTag::GPS_ALTITUDE, array(abs($GPS_alt * 1000), 1000));
$gpslatref = new PelEntryAscii(PelTag::GPS_LATITUDE_REF, $GPS_latref);
$gpslonref = new PelEntryAscii(PelTag::GPS_LONGITUDE_REF, $GPS_lonref);
$gpsaltref = new PelEntryByte(PelTag::GPS_ALTITUDE_REF, $GPS_altref);
$gpsversion = new PelEntryByte(PelTag::GPS_VERSION_ID, 2, 2, 0, 0);
/* Daten eintragen.*/
$subifd->addEntry($gpsversion);
$subifd->addEntry($gpslat);
$subifd->addEntry($gpslon);
$subifd->addEntry($gpsalt);
$subifd->addEntry($gpslatref);
$subifd->addEntry($gpslonref);
$subifd->addEntry($gpsaltref);
$ifd0->addSubIfd($subifd);
file_put_contents($outfile, $image->getBytes());
return 0;
}
}
return -1;
}
function testWriteRead()
{
Pel::setStrictParsing(true);
$ifd = new PelIfd(PelIfd::IFD0);
$this->assertTrue($ifd->isLastIfd());
foreach ($this->entries as $entry) {
$ifd->addEntry($entry);
}
$tiff = new PelTiff();
$this->assertNull($tiff->getIfd());
$tiff->setIfd($ifd);
$this->assertNotNull($tiff->getIfd());
$exif = new PelExif();
$this->assertNull($exif->getTiff());
$exif->setTiff($tiff);
$this->assertNotNull($exif->getTiff());
$jpeg = new PelJpeg(dirname(__FILE__) . '/no-exif.jpg');
$this->assertNull($jpeg->getExif());
$jpeg->setExif($exif);
$this->assertNotNull($jpeg->getExif());
$jpeg->saveFile('test-output.jpg');
$this->assertTrue(file_exists('test-output.jpg'));
$this->assertTrue(filesize('test-output.jpg') > 0);
/* Now read the file and see if the entries are still there. */
$jpeg = new PelJpeg('test-output.jpg');
$exif = $jpeg->getExif();
$this->assertIsA($exif, 'PelExif');
$tiff = $exif->getTiff();
$this->assertIsA($tiff, 'PelTiff');
$ifd = $tiff->getIfd();
$this->assertIsA($ifd, 'PelIfd');
$this->assertEqual($ifd->getType(), PelIfd::IFD0);
$this->assertTrue($ifd->isLastIfd());
foreach ($this->entries as $entry) {
$this->assertEqual($ifd->getEntry($entry->getTag())->getValue(), $entry->getValue());
}
unlink('test-output.jpg');
}
/**
* Add GPS information to an image basic metadata. Any old Exif data
* is discarded.
*
* @param string the input filename.
*
* @param string the output filename. An updated copy of the input
* image is saved here.
*
* @param string image description.
*
* @param string user comment.
*
* @param string camera model.
*
* @param float longitude expressed as a fractional number of degrees,
* e.g. 12.345°. Negative values denotes degrees west of Greenwich.
*
* @param float latitude expressed as for longitude. Negative values
* denote degrees south of equator.
*
* @param float the altitude, negative values express an altitude
* below sea level.
*
* @param string the date and time.
*/
function addGpsInfo($input, $description, $comment, $artist, $make, $model, $longitude, $latitude)
{
/* Load the given image into a PelJpeg object */
$jpeg = new PelJpeg($input);
/* Create and add empty Exif data to the image (this throws away any
* old Exif data in the image). */
$exif = new PelExif();
$jpeg->setExif($exif);
/* Create and add TIFF data to the Exif data (Exif data is actually
* stored in a TIFF format). */
$tiff = new PelTiff();
$exif->setTiff($tiff);
/* Create first Image File Directory and associate it with the TIFF
* data. */
$ifd0 = new PelIfd(PelIfd::IFD0);
$tiff->setIfd($ifd0);
/* Create a sub-IFD for holding GPS information. GPS data must be
* below the first IFD. */
$gps_ifd = new PelIfd(PelIfd::GPS);
$ifd0->addSubIfd($gps_ifd);
/* The USER_COMMENT tag must be put in a Exif sub-IFD under the
* first IFD. */
$exif_ifd = new PelIfd(PelIfd::EXIF);
$exif_ifd->addEntry(new PelEntryUserComment($comment));
$ifd0->addSubIfd($exif_ifd);
$inter_ifd = new PelIfd(PelIfd::INTEROPERABILITY);
$ifd0->addSubIfd($inter_ifd);
$ifd0->addEntry(new PelEntryAscii(PelTag::ARTIST, $artist));
$ifd0->addEntry(new PelEntryAscii(PelTag::MAKE, $make));
$ifd0->addEntry(new PelEntryAscii(PelTag::MODEL, $model));
$ifd0->addEntry(new PelEntryAscii(PelTag::IMAGE_DESCRIPTION, $description));
$gps_ifd->addEntry(new PelEntryByte(PelTag::GPS_VERSION_ID, 2, 2, 0, 0));
// Negative numbers indicate different reference then the usual N/E
if ($longitude < 0) {
$longitude_ref = 'W';
} else {
$longitude_ref = 'E';
}
if ($latitude < 0) {
$latitude_ref = 'S';
} else {
$latitude_ref = 'N';
}
list($h, $m, $s) = convertDecimalToDMS($latitude);
$gps_ifd->addEntry(new PelEntryAscii(PelTag::GPS_LATITUDE_REF, $latitude_ref));
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_LATITUDE, $h, $m, $s));
list($h, $m, $s) = convertDecimalToDMS($longitude);
$gps_ifd->addEntry(new PelEntryAscii(PelTag::GPS_LONGITUDE_REF, $longitude_ref));
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_LONGITUDE, $h, $m, $s));
$gps_ifd->addEntry(new PelEntryRational(PelTag::GPS_ALTITUDE, array(0, 0)));
$gps_ifd->addEntry(new PelEntryByte(PelTag::GPS_ALTITUDE_REF, 0));
//print($gps_ifd);
file_put_contents($input, $jpeg->getBytes());
}
