Файл: concrete5.7.5.6/concrete/vendor/imagine/imagine/lib/Imagine/Image/Metadata/ExifMetadataReader.php
Строк: 77
<?php
/*
* This file is part of the Imagine package.
*
* (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ImagineImageMetadata;
use ImagineExceptionInvalidArgumentException;
use ImagineExceptionNotSupportedException;
/**
* Metadata driven by Exif information
*/
class ExifMetadataReader extends AbstractMetadataReader
{
public function __construct()
{
if (!function_exists('exif_read_data')) {
throw new NotSupportedException('PHP exif extension is required to use the ExifMetadataReader');
}
}
/**
* {@inheritdoc}
*/
protected function extractFromFile($file)
{
if (false === $data = @file_get_contents($file)) {
throw new InvalidArgumentException(sprintf('File %s is not readable.', $file));
}
return $this->doReadData($data);
}
/**
* {@inheritdoc}
*/
protected function extractFromData($data)
{
return $this->doReadData($data);
}
/**
* {@inheritdoc}
*/
protected function extractFromStream($resource)
{
return $this->doReadData(stream_get_contents($resource));
}
/**
* Extracts metadata from raw data, merges with existing metadata
*
* @param string $data
*
* @return MetadataBag
*/
private function doReadData($data)
{
if (substr($data, 0, 2) === 'II') {
$mime = 'image/tiff';
} else {
$mime = 'image/jpeg';
}
return $this->extract('data://' . $mime . ';base64,' . base64_encode($data));
}
/**
* Performs the exif data extraction given a path or data-URI representation.
*
* @param string $path The path to the file or the data-URI representation.
*
* @return MetadataBag
*/
private function extract($path)
{
if (false === $exifData = @exif_read_data($path, null, true, false)) {
return array();
}
$metadata = array();
$sources = array('EXIF' => 'exif', 'IFD0' => 'ifd0');
foreach ($sources as $name => $prefix) {
if (!isset($exifData[$name])) {
continue;
}
foreach ($exifData[$name] as $prop => $value) {
$metadata[$prefix.'.'.$prop] = $value;
}
}
return $metadata;
}
}