ACF image field to display attachment_metadata for EXIF

gistfile1.txt

/*
	*  format_value()
	*
	*  This filter is appied to the $value after it is loaded from the db and before it is returned to the template
	*
	*  @type	filter
	*  @since	3.6
	*  @date	23/01/13
	*
	*  @param	$value (mixed) the value which was loaded from the database
	*  @param	$post_id (mixed) the $post_id from which the value was loaded
	*  @param	$field (array) the field array holding all the field options
	*
	*  @return	$value (mixed) the modified value
	*/
	
	function format_value( $value, $post_id, $field ) {
		
		// bail early if no value
		if( empty($value) ) {
		
			return $value;
			
		}
		
		
		// convert to int
		$value = intval($value);
		
		
		// format
		if( $field['return_format'] == 'url' ) {
		
			$value = wp_get_attachment_url( $value );
			
		} elseif( $field['return_format'] == 'array' ) {
			
			$attachment = get_post( $value );
			
			
			// validate
			if( !$attachment ) {
			
				return false;
					
			}
			
			// create array to hold value data
			$src = wp_get_attachment_image_src( $attachment->ID, 'full' );
			
			$value = array(
				'ID'			=> $attachment->ID,
				'id'			=> $attachment->ID,
				'alt'			=> get_post_meta($attachment->ID, '_wp_attachment_image_alt', true),
				'title'			=> $attachment->post_title,
				'caption'		=> $attachment->post_excerpt,
				'description'	=> $attachment->post_content,
				'url'			=> $src[0],
				'width'			=> $src[1],
				'height'		=> $src[2],
			);
			
			// find all image meta
			$image_meta = wp_get_attachment_metadata($attachment->ID);
			if( $image_meta ) {
				$value['image_meta'] = array();
				$value['image_meta']['aperture' ] = $image_meta[image_meta][aperture];
				$value['image_meta']['credit' ] = $image_meta[image_meta][credit];
				$value['image_meta']['camera' ] = $image_meta[image_meta][camera];
				$value['image_meta']['caption' ] = $image_meta[image_meta][caption];
				$value['image_meta']['created_timestamp' ] = $image_meta[image_meta][created_timestamp];
				$value['image_meta']['copyright' ] = $image_meta[image_meta][copyright];
				$value['image_meta']['focal_length' ] = $image_meta[image_meta][focal_length];
				$value['image_meta']['iso' ] = $image_meta[image_meta][iso];
				$value['image_meta']['shutter_speed' ] = $image_meta[image_meta][shutter_speed];
				$value['image_meta']['title' ] = $image_meta[image_meta][title];
				$value['image_meta']['orientation' ] = $image_meta[image_meta][orientation];
			}

			// find all image sizes
			$image_sizes = get_intermediate_image_sizes();
			
			if( $image_sizes ) {
				
				$value['sizes'] = array();
				
				foreach( $image_sizes as $image_size ) {
					
					// find src
					$src = wp_get_attachment_image_src( $attachment->ID, $image_size );
					
					// add src
					$value['sizes'][ $image_size ] = $src[0];
					$value['sizes'][ $image_size . '-width' ] = $src[1];
					$value['sizes'][ $image_size . '-height' ] = $src[2];
					
				}
				// foreach( $image_sizes as $image_size )
				
			}
			// if( $image_sizes )
			
		}
		
		return $value;
		
	}