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<?php |
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/** |
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* PEL: PHP Exif Library. |
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* A library with support for reading and |
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* writing all Exif headers in JPEG and TIFF images using PHP. |
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* |
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 Martin Geisler. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program in the file COPYING; if not, write to the |
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
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* Boston, MA 02110-1301 USA |
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*/ |
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namespace lsolesen\pel; |
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/** |
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* Classes for dealing with Exif IFDs. |
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* |
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* @author Martin Geisler <[email protected]> |
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* @license http://www.gnu.org/licenses/gpl.html GNU General Public |
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* License (GPL) |
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* @package PEL |
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*/ |
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/** |
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* Class representing an Image File Directory (IFD). |
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* |
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* {@link PelTiff TIFF data} is structured as a number of Image File |
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* Directories, IFDs for short. Each IFD contains a number of {@link |
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* PelEntry entries}, some data and finally a link to the next IFD. |
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* |
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* @author Martin Geisler <[email protected]> |
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* @package PEL |
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*/ |
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class PelIfd implements \IteratorAggregate, \ArrayAccess |
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{ |
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/** |
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* Main image IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the IFD of the main image. |
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*/ |
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const IFD0 = 0; |
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/** |
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* Thumbnail image IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the IFD of the thumbnail image. |
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*/ |
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const IFD1 = 1; |
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/** |
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* Exif IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the Exif sub-IFD. |
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*/ |
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const EXIF = 2; |
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/** |
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* GPS IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the GPS sub-IFD. |
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*/ |
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const GPS = 3; |
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/** |
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* Interoperability IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the interoperability sub-IFD. |
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*/ |
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const INTEROPERABILITY = 4; |
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/** |
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* Canon Maker Notes IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_MAKER_NOTES = 5; |
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/** |
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* Canon Camera Settings IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_CAMERA_SETTINGS = 6; |
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/** |
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* Canon Shot Info IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_SHOT_INFO = 7; |
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/** |
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* Canon Shot Info IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_PANORAMA = 8; |
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/** |
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* Canon Shot Info IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_PICTURE_INFO = 9; |
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/** |
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* Canon Shot Info IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_FILE_INFO = 10; |
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/** |
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* Canon Shot Info IFD. |
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* |
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* Pass this to the constructor when creating an IFD which will be |
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* the canon maker notes sub-IFD. |
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*/ |
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const CANON_CUSTOM_FUNCTIONS = 11; |
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private const TYPE_NAMES = [ |
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self::IFD0 => '0', |
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self::IFD1 => '1', |
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self::EXIF => 'Exif', |
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self::GPS => 'GPS', |
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self::INTEROPERABILITY => 'Interoperability', |
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self::CANON_MAKER_NOTES => 'Canon Maker Notes', |
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self::CANON_CAMERA_SETTINGS => 'Canon Camera Settings', |
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self::CANON_SHOT_INFO => 'Canon Shot Information', |
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self::CANON_PANORAMA => 'Canon Panorama Information', |
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self::CANON_PICTURE_INFO => 'Canon Picture Information', |
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self::CANON_FILE_INFO => 'Canon File Information', |
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self::CANON_CUSTOM_FUNCTIONS => 'Canon Custom Functions' |
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]; |
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private const VALID_TAGS = [ |
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self::IFD0 => [ |
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PelTag::IMAGE_WIDTH, |
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PelTag::IMAGE_LENGTH, |
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PelTag::BITS_PER_SAMPLE, |
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PelTag::COMPRESSION, |
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PelTag::PHOTOMETRIC_INTERPRETATION, |
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PelTag::DOCUMENT_NAME, |
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PelTag::IMAGE_DESCRIPTION, |
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PelTag::MAKE, |
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PelTag::MODEL, |
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PelTag::STRIP_OFFSETS, |
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PelTag::ORIENTATION, |
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PelTag::SAMPLES_PER_PIXEL, |
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PelTag::ROWS_PER_STRIP, |
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PelTag::STRIP_BYTE_COUNTS, |
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PelTag::X_RESOLUTION, |
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PelTag::Y_RESOLUTION, |
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PelTag::PLANAR_CONFIGURATION, |
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PelTag::RESOLUTION_UNIT, |
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PelTag::TRANSFER_FUNCTION, |
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PelTag::SOFTWARE, |
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PelTag::DATE_TIME, |
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PelTag::ARTIST, |
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PelTag::PREDICTOR, |
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PelTag::WHITE_POINT, |
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PelTag::PRIMARY_CHROMATICITIES, |
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PelTag::EXTRA_SAMPLES, |
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PelTag::SAMPLE_FORMAT, |
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PelTag::JPEG_INTERCHANGE_FORMAT, |
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PelTag::JPEG_INTERCHANGE_FORMAT_LENGTH, |
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PelTag::YCBCR_COEFFICIENTS, |
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PelTag::YCBCR_SUB_SAMPLING, |
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PelTag::YCBCR_POSITIONING, |
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PelTag::REFERENCE_BLACK_WHITE, |
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PelTag::COPYRIGHT, |
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PelTag::EXIF_IFD_POINTER, |
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PelTag::GPS_INFO_IFD_POINTER, |
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PelTag::PRINT_IM, |
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PelTag::XP_TITLE, |
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PelTag::XP_COMMENT, |
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PelTag::XP_AUTHOR, |
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PelTag::XP_KEYWORDS, |
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PelTag::XP_SUBJECT, |
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PelTag::RATING, |
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PelTag::RATING_PERCENT, |
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PelTag::APPLICATION_NOTES |
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], |
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self::EXIF => [ |
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PelTag::EXPOSURE_TIME, |
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PelTag::FNUMBER, |
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PelTag::EXPOSURE_PROGRAM, |
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PelTag::SPECTRAL_SENSITIVITY, |
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PelTag::ISO_SPEED_RATINGS, |
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PelTag::OECF, |
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PelTag::EXIF_VERSION, |
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PelTag::DATE_TIME_ORIGINAL, |
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PelTag::DATE_TIME_DIGITIZED, |
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PelTag::OFFSET_TIME, |
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PelTag::OFFSET_TIME_ORIGINAL, |
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PelTag::OFFSET_TIME_DIGITIZED, |
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PelTag::COMPONENTS_CONFIGURATION, |
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PelTag::COMPRESSED_BITS_PER_PIXEL, |
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PelTag::SHUTTER_SPEED_VALUE, |
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PelTag::APERTURE_VALUE, |
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PelTag::BRIGHTNESS_VALUE, |
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PelTag::EXPOSURE_BIAS_VALUE, |
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PelTag::MAX_APERTURE_VALUE, |
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PelTag::SUBJECT_DISTANCE, |
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PelTag::METERING_MODE, |
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PelTag::LIGHT_SOURCE, |
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PelTag::FLASH, |
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PelTag::FOCAL_LENGTH, |
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PelTag::MAKER_NOTE, |
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PelTag::USER_COMMENT, |
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PelTag::SUB_SEC_TIME, |
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PelTag::SUB_SEC_TIME_ORIGINAL, |
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PelTag::SUB_SEC_TIME_DIGITIZED, |
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PelTag::FLASH_PIX_VERSION, |
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PelTag::COLOR_SPACE, |
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PelTag::PIXEL_X_DIMENSION, |
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PelTag::PIXEL_Y_DIMENSION, |
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PelTag::RELATED_SOUND_FILE, |
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PelTag::FLASH_ENERGY, |
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PelTag::SPATIAL_FREQUENCY_RESPONSE, |
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PelTag::FOCAL_PLANE_X_RESOLUTION, |
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PelTag::FOCAL_PLANE_Y_RESOLUTION, |
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PelTag::FOCAL_PLANE_RESOLUTION_UNIT, |
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PelTag::SUBJECT_LOCATION, |
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PelTag::EXPOSURE_INDEX, |
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PelTag::SENSING_METHOD, |
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PelTag::FILE_SOURCE, |
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PelTag::SCENE_TYPE, |
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PelTag::CFA_PATTERN, |
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PelTag::CUSTOM_RENDERED, |
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PelTag::EXPOSURE_MODE, |
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PelTag::WHITE_BALANCE, |
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PelTag::DIGITAL_ZOOM_RATIO, |
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PelTag::FOCAL_LENGTH_IN_35MM_FILM, |
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PelTag::SCENE_CAPTURE_TYPE, |
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PelTag::GAIN_CONTROL, |
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PelTag::CONTRAST, |
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PelTag::SATURATION, |
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PelTag::SHARPNESS, |
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PelTag::DEVICE_SETTING_DESCRIPTION, |
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PelTag::SUBJECT_DISTANCE_RANGE, |
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PelTag::IMAGE_UNIQUE_ID, |
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PelTag::INTEROPERABILITY_IFD_POINTER, |
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PelTag::GAMMA |
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], |
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self::GPS => [ |
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PelTag::GPS_VERSION_ID, |
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PelTag::GPS_LATITUDE_REF, |
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273
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PelTag::GPS_LATITUDE, |
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PelTag::GPS_LONGITUDE_REF, |
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PelTag::GPS_LONGITUDE, |
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PelTag::GPS_ALTITUDE_REF, |
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PelTag::GPS_ALTITUDE, |
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PelTag::GPS_TIME_STAMP, |
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PelTag::GPS_SATELLITES, |
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280
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PelTag::GPS_STATUS, |
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PelTag::GPS_MEASURE_MODE, |
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PelTag::GPS_DOP, |
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PelTag::GPS_SPEED_REF, |
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PelTag::GPS_SPEED, |
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PelTag::GPS_TRACK_REF, |
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PelTag::GPS_TRACK, |
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PelTag::GPS_IMG_DIRECTION_REF, |
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288
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PelTag::GPS_IMG_DIRECTION, |
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PelTag::GPS_MAP_DATUM, |
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PelTag::GPS_DEST_LATITUDE_REF, |
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PelTag::GPS_DEST_LATITUDE, |
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PelTag::GPS_DEST_LONGITUDE_REF, |
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PelTag::GPS_DEST_LONGITUDE, |
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PelTag::GPS_DEST_BEARING_REF, |
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PelTag::GPS_DEST_BEARING, |
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PelTag::GPS_DEST_DISTANCE_REF, |
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PelTag::GPS_DEST_DISTANCE, |
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PelTag::GPS_PROCESSING_METHOD, |
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PelTag::GPS_AREA_INFORMATION, |
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300
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PelTag::GPS_DATE_STAMP, |
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301
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PelTag::GPS_DIFFERENTIAL |
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302
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], |
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self::INTEROPERABILITY => [ |
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304
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PelTag::INTEROPERABILITY_INDEX, |
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305
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PelTag::INTEROPERABILITY_VERSION, |
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306
|
|
|
PelTag::RELATED_IMAGE_FILE_FORMAT, |
|
307
|
|
|
PelTag::RELATED_IMAGE_WIDTH, |
|
308
|
|
|
PelTag::RELATED_IMAGE_LENGTH |
|
309
|
|
|
], |
|
310
|
|
|
self::CANON_MAKER_NOTES => [ |
|
311
|
|
|
PelTag::CANON_CAMERA_SETTINGS, |
|
312
|
|
|
PelTag::CANON_FOCAL_LENGTH, |
|
313
|
|
|
PelTag::CANON_SHOT_INFO, |
|
314
|
|
|
PelTag::CANON_PANORAMA, |
|
315
|
|
|
PelTag::CANON_IMAGE_TYPE, |
|
316
|
|
|
PelTag::CANON_FIRMWARE_VERSION, |
|
317
|
|
|
PelTag::CANON_FILE_NUMBER, |
|
318
|
|
|
PelTag::CANON_OWNER_NAME, |
|
319
|
|
|
PelTag::CANON_SERIAL_NUMBER, |
|
320
|
|
|
PelTag::CANON_CAMERA_INFO, |
|
321
|
|
|
PelTag::CANON_CUSTOM_FUNCTIONS, |
|
322
|
|
|
PelTag::CANON_MODEL_ID, |
|
323
|
|
|
PelTag::CANON_PICTURE_INFO, |
|
324
|
|
|
PelTag::CANON_THUMBNAIL_IMAGE_VALID_AREA, |
|
325
|
|
|
PelTag::CANON_SERIAL_NUMBER_FORMAT, |
|
326
|
|
|
PelTag::CANON_SUPER_MACRO, |
|
327
|
|
|
PelTag::CANON_FIRMWARE_REVISION, |
|
328
|
|
|
PelTag::CANON_AF_INFO, |
|
329
|
|
|
PelTag::CANON_ORIGINAL_DECISION_DATA_OFFSET, |
|
330
|
|
|
PelTag::CANON_WHITE_BALANCE_TABLE, |
|
331
|
|
|
PelTag::CANON_LENS_MODEL, |
|
332
|
|
|
PelTag::CANON_INTERNAL_SERIAL_NUMBER, |
|
333
|
|
|
PelTag::CANON_DUST_REMOVAL_DATA, |
|
334
|
|
|
PelTag::CANON_CUSTOM_FUNCTIONS_2, |
|
335
|
|
|
PelTag::CANON_PROCESSING_INFO, |
|
336
|
|
|
PelTag::CANON_MEASURED_COLOR, |
|
337
|
|
|
PelTag::CANON_COLOR_SPACE, |
|
338
|
|
|
PelTag::CANON_VRD_OFFSET, |
|
339
|
|
|
PelTag::CANON_SENSOR_INFO, |
|
340
|
|
|
PelTag::CANON_COLOR_DATA |
|
341
|
|
|
], |
|
342
|
|
|
self::CANON_CAMERA_SETTINGS => [ |
|
343
|
|
|
PelTag::CANON_CS_MACRO, |
|
344
|
|
|
PelTag::CANON_CS_SELF_TIMER, |
|
345
|
|
|
PelTag::CANON_CS_QUALITY, |
|
346
|
|
|
PelTag::CANON_CS_FLASH_MODE, |
|
347
|
|
|
PelTag::CANON_CS_DRIVE_MODE, |
|
348
|
|
|
PelTag::CANON_CS_FOCUS_MODE, |
|
349
|
|
|
PelTag::CANON_CS_RECORD_MODE, |
|
350
|
|
|
PelTag::CANON_CS_IMAGE_SIZE, |
|
351
|
|
|
PelTag::CANON_CS_EASY_MODE, |
|
352
|
|
|
PelTag::CANON_CS_DIGITAL_ZOOM, |
|
353
|
|
|
PelTag::CANON_CS_CONTRAST, |
|
354
|
|
|
PelTag::CANON_CS_SATURATION, |
|
355
|
|
|
PelTag::CANON_CS_SHARPNESS, |
|
356
|
|
|
PelTag::CANON_CS_ISO_SPEED, |
|
357
|
|
|
PelTag::CANON_CS_METERING_MODE, |
|
358
|
|
|
PelTag::CANON_CS_FOCUS_TYPE, |
|
359
|
|
|
PelTag::CANON_CS_AF_POINT, |
|
360
|
|
|
PelTag::CANON_CS_EXPOSURE_PROGRAM, |
|
361
|
|
|
PelTag::CANON_CS_LENS_TYPE, |
|
362
|
|
|
PelTag::CANON_CS_LENS, |
|
363
|
|
|
PelTag::CANON_CS_SHORT_FOCAL, |
|
364
|
|
|
PelTag::CANON_CS_FOCAL_UNITS, |
|
365
|
|
|
PelTag::CANON_CS_MAX_APERTURE, |
|
366
|
|
|
PelTag::CANON_CS_MIN_APERTURE, |
|
367
|
|
|
PelTag::CANON_CS_FLASH_ACTIVITY, |
|
368
|
|
|
PelTag::CANON_CS_FLASH_DETAILS, |
|
369
|
|
|
PelTag::CANON_CS_FOCUS_CONTINUOUS, |
|
370
|
|
|
PelTag::CANON_CS_AE_SETTING, |
|
371
|
|
|
PelTag::CANON_CS_IMAGE_STABILIZATION, |
|
372
|
|
|
PelTag::CANON_CS_DISPLAY_APERTURE, |
|
373
|
|
|
PelTag::CANON_CS_ZOOM_SOURCE_WIDTH, |
|
374
|
|
|
PelTag::CANON_CS_ZOOM_TARGET_WIDTH, |
|
375
|
|
|
PelTag::CANON_CS_SPOT_METERING_MODE, |
|
376
|
|
|
PelTag::CANON_CS_PHOTO_EFFECT, |
|
377
|
|
|
PelTag::CANON_CS_MANUAL_FLASH_OUTPUT, |
|
378
|
|
|
PelTag::CANON_CS_COLOR_TONE, |
|
379
|
|
|
PelTag::CANON_CS_SRAW_QUALITY |
|
380
|
|
|
], |
|
381
|
|
|
self::CANON_SHOT_INFO => [ |
|
382
|
|
|
PelTag::CANON_SI_ISO_SPEED, |
|
383
|
|
|
PelTag::CANON_SI_MEASURED_EV, |
|
384
|
|
|
PelTag::CANON_SI_TARGET_APERTURE, |
|
385
|
|
|
PelTag::CANON_SI_TARGET_SHUTTER_SPEED, |
|
386
|
|
|
PelTag::CANON_SI_WHITE_BALANCE, |
|
387
|
|
|
PelTag::CANON_SI_SLOW_SHUTTER, |
|
388
|
|
|
PelTag::CANON_SI_SEQUENCE, |
|
389
|
|
|
PelTag::CANON_SI_AF_POINT_USED, |
|
390
|
|
|
PelTag::CANON_SI_FLASH_BIAS, |
|
391
|
|
|
PelTag::CANON_SI_AUTO_EXPOSURE_BRACKETING, |
|
392
|
|
|
PelTag::CANON_SI_SUBJECT_DISTANCE, |
|
393
|
|
|
PelTag::CANON_SI_APERTURE_VALUE, |
|
394
|
|
|
PelTag::CANON_SI_SHUTTER_SPEED_VALUE, |
|
395
|
|
|
PelTag::CANON_SI_MEASURED_EV2, |
|
396
|
|
|
PelTag::CANON_SI_CAMERA_TYPE, |
|
397
|
|
|
PelTag::CANON_SI_AUTO_ROTATE, |
|
398
|
|
|
PelTag::CANON_SI_ND_FILTER |
|
399
|
|
|
], |
|
400
|
|
|
self::CANON_PANORAMA => [ |
|
401
|
|
|
PelTag::CANON_PA_PANORAMA_FRAME, |
|
402
|
|
|
PelTag::CANON_PA_PANORAMA_DIRECTION |
|
403
|
|
|
], |
|
404
|
|
|
self::CANON_PICTURE_INFO => [ |
|
405
|
|
|
PelTag::CANON_PI_IMAGE_WIDTH, |
|
406
|
|
|
PelTag::CANON_PI_IMAGE_HEIGHT, |
|
407
|
|
|
PelTag::CANON_PI_IMAGE_WIDTH_AS_SHOT, |
|
408
|
|
|
PelTag::CANON_PI_IMAGE_HEIGHT_AS_SHOT, |
|
409
|
|
|
PelTag::CANON_PI_AF_POINTS_USED, |
|
410
|
|
|
PelTag::CANON_PI_AF_POINTS_USED_20D |
|
411
|
|
|
], |
|
412
|
|
|
self::CANON_FILE_INFO => [ |
|
413
|
|
|
PelTag::CANON_FI_FILE_NUMBER, |
|
414
|
|
|
PelTag::CANON_FI_BRACKET_MODE, |
|
415
|
|
|
PelTag::CANON_FI_BRACKET_VALUE, |
|
416
|
|
|
PelTag::CANON_FI_BRACKET_SHOT_NUMBER, |
|
417
|
|
|
PelTag::CANON_FI_RAW_JPG_QUALITY, |
|
418
|
|
|
PelTag::CANON_FI_RAW_JPG_SIZE, |
|
419
|
|
|
PelTag::CANON_FI_NOISE_REDUCTION, |
|
420
|
|
|
PelTag::CANON_FI_WB_BRACKET_MODE, |
|
421
|
|
|
PelTag::CANON_FI_WB_BRACKET_VALUE_AB, |
|
422
|
|
|
PelTag::CANON_FI_WB_BRACKET_VALUE_GM, |
|
423
|
|
|
PelTag::CANON_FI_FILTER_EFFECT, |
|
424
|
|
|
PelTag::CANON_FI_TONING_EFFECT, |
|
425
|
|
|
PelTag::CANON_FI_MACRO_MAGNIFICATION, |
|
426
|
|
|
PelTag::CANON_FI_LIVE_VIEW_SHOOTING, |
|
427
|
|
|
PelTag::CANON_FI_FOCUS_DISTANCE_UPPER, |
|
428
|
|
|
PelTag::CANON_FI_FOCUS_DISTANCE_LOWER, |
|
429
|
|
|
PelTag::CANON_FI_FLASH_EXPOSURE_LOCK |
|
430
|
|
|
] |
|
431
|
|
|
/* |
|
432
|
|
|
* TODO: Where do these tags belong? |
|
433
|
|
|
* PelTag::FILL_ORDER, |
|
434
|
|
|
* PelTag::TRANSFER_RANGE, |
|
435
|
|
|
* PelTag::JPEG_PROC, |
|
436
|
|
|
* PelTag::BATTERY_LEVEL, |
|
437
|
|
|
* PelTag::IPTC_NAA, |
|
438
|
|
|
* PelTag::INTER_COLOR_PROFILE, |
|
439
|
|
|
* PelTag::CFA_REPEAT_PATTERN_DIM, |
|
440
|
|
|
*/ |
|
441
|
|
|
]; |
|
442
|
|
|
|
|
443
|
|
|
/** |
|
444
|
|
|
* The maker notes held by this directory. |
|
445
|
|
|
* |
|
446
|
|
|
* Stores information of the MakerNotes IFD. |
|
447
|
|
|
* Available and required keys are: parent, data, components and offset |
|
448
|
|
|
* |
|
449
|
|
|
* @var array |
|
450
|
|
|
*/ |
|
451
|
|
|
private $maker_notes = []; |
|
452
|
|
|
|
|
453
|
|
|
/** |
|
454
|
|
|
* The entries held by this directory. |
|
455
|
|
|
* |
|
456
|
|
|
* Each tag in the directory is represented by a {@link PelEntry} |
|
457
|
|
|
* object in this array. |
|
458
|
|
|
* |
|
459
|
|
|
* @var array |
|
460
|
|
|
*/ |
|
461
|
|
|
private $entries = []; |
|
462
|
|
|
|
|
463
|
|
|
/** |
|
464
|
|
|
* The type of this directory. |
|
465
|
|
|
* |
|
466
|
|
|
* Initialized in the constructor. Must be one of {@link IFD0}, |
|
467
|
|
|
* {@link IFD1}, {@link EXIF}, {@link GPS}, or {@link |
|
468
|
|
|
* INTEROPERABILITY}. |
|
469
|
|
|
* |
|
470
|
|
|
* @var int |
|
471
|
|
|
*/ |
|
472
|
|
|
private $type; |
|
473
|
|
|
|
|
474
|
|
|
/** |
|
475
|
|
|
* The next directory. |
|
476
|
|
|
* |
|
477
|
|
|
* This will be initialized in the constructor, or be left as null |
|
478
|
|
|
* if this is the last directory. |
|
479
|
|
|
* |
|
480
|
|
|
* @var PelIfd |
|
481
|
|
|
*/ |
|
482
|
|
|
private $next = null; |
|
483
|
|
|
|
|
484
|
|
|
/** |
|
485
|
|
|
* Sub-directories pointed to by this directory. |
|
486
|
|
|
* |
|
487
|
|
|
* This will be an array of ({@link PelTag}, {@link PelIfd}) pairs. |
|
488
|
|
|
* |
|
489
|
|
|
* @var array |
|
490
|
|
|
*/ |
|
491
|
|
|
private $sub = []; |
|
492
|
|
|
|
|
493
|
|
|
/** |
|
494
|
|
|
* The thumbnail data. |
|
495
|
|
|
* |
|
496
|
|
|
* This will be initialized in the constructor, or be left as null |
|
497
|
|
|
* if there are no thumbnail as part of this directory. |
|
498
|
|
|
* |
|
499
|
|
|
* @var PelDataWindow |
|
500
|
|
|
*/ |
|
501
|
|
|
private $thumb_data = null; |
|
502
|
|
|
|
|
503
|
|
|
// TODO: use this format to choose between the |
|
504
|
|
|
// JPEG_INTERCHANGE_FORMAT and STRIP_OFFSETS tags. |
|
505
|
|
|
// private $thumb_format; |
|
506
|
|
|
|
|
507
|
|
|
/** |
|
508
|
|
|
* Construct a new Image File Directory (IFD). |
|
509
|
|
|
* |
|
510
|
|
|
* The IFD will be empty, use the {@link addEntry()} method to add |
|
511
|
|
|
* an {@link PelEntry}. Use the {@link setNext()} method to link |
|
512
|
|
|
* this IFD to another. |
|
513
|
|
|
* |
|
514
|
|
|
* @param integer $type |
|
515
|
|
|
* the type of this IFD. Must be one of {@link |
|
516
|
|
|
* IFD0}, {@link IFD1}, {@link EXIF}, {@link GPS}, or {@link |
|
517
|
|
|
* INTEROPERABILITY}. An {@link PelIfdException} will be thrown |
|
518
|
|
|
* otherwise. |
|
519
|
|
|
* @throws PelIfdException |
|
520
|
|
|
*/ |
|
521
|
32 |
|
public function __construct($type) |
|
522
|
|
|
{ |
|
523
|
32 |
|
if (! array_key_exists($type, self::TYPE_NAMES)) { |
|
524
|
|
|
throw new PelIfdException('Unknown IFD type: %d', $type); |
|
525
|
|
|
} |
|
526
|
32 |
|
$this->type = $type; |
|
527
|
32 |
|
} |
|
528
|
|
|
|
|
529
|
|
|
/** |
|
530
|
|
|
* Stores Maker Notes data for an IFD (Probably PelIfd::EXIF only). |
|
531
|
|
|
* |
|
532
|
|
|
* @param PelIfd $parent |
|
533
|
|
|
* the parent PelIfd of the current PelIfd |
|
534
|
|
|
* @param PelDataWindow $data |
|
535
|
|
|
* the data window that will provide the data. |
|
536
|
|
|
* @param PelIfd $parent |
|
537
|
|
|
* the components in the entry. |
|
538
|
|
|
* @param integer $offset |
|
539
|
|
|
* the offset within the window where the directory will |
|
540
|
|
|
* be found. |
|
541
|
|
|
*/ |
|
542
|
14 |
|
public function setMakerNotes($parent, $data, $components, $offset) |
|
543
|
|
|
{ |
|
544
|
14 |
|
$this->maker_notes = [ |
|
545
|
14 |
|
'parent' => $parent, |
|
546
|
14 |
|
'data' => $data, |
|
547
|
14 |
|
'components' => $components, |
|
548
|
14 |
|
'offset' => $offset |
|
549
|
|
|
]; |
|
550
|
14 |
|
} |
|
551
|
|
|
|
|
552
|
|
|
/** |
|
553
|
|
|
* Returns the Maker Notes data for an IFD (Probably PelIfd::EXIF only). |
|
554
|
|
|
* |
|
555
|
|
|
* @return array The maker_notes of IDF |
|
556
|
|
|
*/ |
|
557
|
17 |
|
public function getMakerNotes() |
|
558
|
|
|
{ |
|
559
|
17 |
|
return $this->maker_notes; |
|
560
|
|
|
} |
|
561
|
|
|
|
|
562
|
|
|
/** |
|
563
|
|
|
* Load data into a Image File Directory (IFD). |
|
564
|
|
|
* |
|
565
|
|
|
* @param PelDataWindow $d |
|
566
|
|
|
* the data window that will provide the data. |
|
567
|
|
|
* @param integer $offset |
|
568
|
|
|
* the offset within the window where the directory will |
|
569
|
|
|
* be found. |
|
570
|
|
|
* @throws PelException |
|
571
|
|
|
* @throws PelUnexpectedFormatException |
|
572
|
|
|
* @throws PelWrongComponentCountException |
|
573
|
|
|
*/ |
|
574
|
30 |
|
public function load(PelDataWindow $d, $offset) |
|
575
|
|
|
{ |
|
576
|
30 |
|
$starting_offset = $offset; |
|
577
|
30 |
|
$thumb_offset = 0; |
|
578
|
30 |
|
$thumb_length = 0; |
|
579
|
|
|
|
|
580
|
30 |
|
Pel::debug('Constructing IFD at offset %d from %d bytes...', $offset, $d->getSize()); |
|
581
|
|
|
|
|
582
|
|
|
/* Read the number of entries */ |
|
583
|
30 |
|
$n = $d->getShort($offset); |
|
584
|
30 |
|
Pel::debug('Loading %d entries...', $n); |
|
585
|
|
|
|
|
586
|
30 |
|
$offset += 2; |
|
587
|
|
|
|
|
588
|
|
|
/* Check if we have enough data. */ |
|
589
|
30 |
|
if ($offset + 12 * $n > $d->getSize()) { |
|
590
|
1 |
|
$n = floor(($offset - $d->getSize()) / 12); |
|
591
|
1 |
|
Pel::maybeThrow(new PelIfdException('Adjusted to: %d.', $n)); |
|
592
|
|
|
} |
|
593
|
|
|
|
|
594
|
30 |
|
for ($i = 0; $i < $n; $i ++) { |
|
595
|
|
|
// TODO: increment window start instead of using offsets. |
|
596
|
30 |
|
$tag = $d->getShort($offset + 12 * $i); |
|
597
|
30 |
|
Pel::debug('Loading entry with tag 0x%04X: %s (%d of %d)...', $tag, PelTag::getName($this->type, $tag), $i + 1, $n); |
|
598
|
|
|
|
|
599
|
30 |
|
switch ($tag) { |
|
600
|
|
|
case PelTag::EXIF_IFD_POINTER: |
|
601
|
|
|
case PelTag::GPS_INFO_IFD_POINTER: |
|
602
|
|
|
case PelTag::INTEROPERABILITY_IFD_POINTER: |
|
603
|
|
|
case PelTag::MAKER_NOTE: |
|
604
|
19 |
|
$o = $d->getLong($offset + 12 * $i + 8); |
|
605
|
19 |
|
Pel::debug('Found sub IFD at offset %d', $o); |
|
606
|
19 |
|
$components = $d->getLong($offset + 12 * $i + 4); |
|
607
|
|
|
|
|
608
|
19 |
|
$ifdType = $this->mapTagToIfdType($d, $offset, $tag, $components, $i, $o); |
|
609
|
|
|
|
|
610
|
19 |
|
if ($ifdType === null) { |
|
611
|
14 |
|
break; |
|
612
|
19 |
|
} elseif ($starting_offset == $o) { |
|
613
|
1 |
|
Pel::maybeThrow(new PelIfdException('Bogus offset to next IFD: %d, same as offset being loaded from.', $o)); |
|
614
|
|
|
} else { |
|
615
|
19 |
|
$ifd = new PelIfd($ifdType); |
|
616
|
|
|
try { |
|
617
|
19 |
|
$ifd->load($d, $o); |
|
618
|
18 |
|
$this->sub[$ifdType] = $ifd; |
|
619
|
2 |
|
} catch (PelDataWindowOffsetException $e) { |
|
620
|
1 |
|
Pel::maybeThrow(new PelIfdException($e->getMessage())); |
|
621
|
|
|
} |
|
622
|
|
|
} |
|
623
|
19 |
|
break; |
|
624
|
|
|
case PelTag::JPEG_INTERCHANGE_FORMAT: |
|
625
|
15 |
|
$thumb_offset = $d->getLong($offset + 12 * $i + 8); |
|
626
|
15 |
|
$this->safeSetThumbnail($d, $thumb_offset, $thumb_length); |
|
627
|
15 |
|
break; |
|
628
|
|
|
case PelTag::JPEG_INTERCHANGE_FORMAT_LENGTH: |
|
629
|
15 |
|
$thumb_length = $d->getLong($offset + 12 * $i + 8); |
|
630
|
15 |
|
$this->safeSetThumbnail($d, $thumb_offset, $thumb_length); |
|
631
|
15 |
|
break; |
|
632
|
|
|
default: |
|
633
|
30 |
|
$this->loadSingleValue($d, $offset, $i, $tag); |
|
634
|
30 |
|
break; |
|
635
|
|
|
} |
|
636
|
|
|
} |
|
637
|
|
|
|
|
638
|
30 |
|
$this->getOffsetToNextIfd($d, $offset, $n); |
|
639
|
30 |
|
$this->checkIfLoadingFinished(); |
|
640
|
30 |
|
} |
|
641
|
|
|
|
|
642
|
|
|
/** |
|
643
|
|
|
* Map tag to IFD type |
|
644
|
|
|
* |
|
645
|
|
|
* @param PelDataWindow $d |
|
646
|
|
|
* @param integer $offset |
|
647
|
|
|
* @param integer $tag |
|
648
|
|
|
* @param integer $components |
|
649
|
|
|
* @param integer $i |
|
650
|
|
|
* @param integer $o |
|
651
|
|
|
* @return NULL|mixed|number[][] |
|
652
|
|
|
*/ |
|
653
|
19 |
|
private function mapTagToIfdType(PelDataWindow $d, $offset, $tag, $components, $i, $o) |
|
654
|
|
|
{ |
|
655
|
19 |
|
$ifdType = null; |
|
656
|
|
|
|
|
657
|
|
|
/* Map tag to IFD type. */ |
|
658
|
19 |
|
if ($tag == PelTag::EXIF_IFD_POINTER) { |
|
659
|
19 |
|
$ifdType = PelIfd::EXIF; |
|
660
|
16 |
|
} elseif ($tag == PelTag::GPS_INFO_IFD_POINTER) { |
|
661
|
4 |
|
$ifdType = PelIfd::GPS; |
|
662
|
15 |
|
} elseif ($tag == PelTag::INTEROPERABILITY_IFD_POINTER) { |
|
663
|
13 |
|
$ifdType = PelIfd::INTEROPERABILITY; |
|
664
|
14 |
|
} elseif ($tag == PelTag::MAKER_NOTE) { |
|
665
|
|
|
// Store maker notes infos, because we need PelTag::MAKE of PelIfd::IFD0 for MakerNotes |
|
666
|
|
|
// Thus MakerNotes will be loaded at the end of loading PelIfd::IFD0 |
|
667
|
14 |
|
$this->setMakerNotes($this, $d, $components, $o); |
|
668
|
14 |
|
$this->loadSingleValue($d, $offset, $i, $tag); |
|
669
|
|
|
} |
|
670
|
19 |
|
return $ifdType; |
|
671
|
|
|
} |
|
672
|
|
|
|
|
673
|
|
|
/** |
|
674
|
|
|
* Offset to next IFD |
|
675
|
|
|
* |
|
676
|
|
|
* @param PelDataWindow $d |
|
677
|
|
|
* @param integer $offset |
|
678
|
|
|
* @param float $n |
|
679
|
|
|
*/ |
|
680
|
30 |
|
private function getOffsetToNextIfd(PelDataWindow $d, $offset, $n) |
|
681
|
|
|
{ |
|
682
|
30 |
|
$o = $d->getLong((int) ($offset + 12 * $n)); |
|
683
|
30 |
|
Pel::debug('Current offset is %d, link at %d points to %d.', $offset, $offset + 12 * $n, $o); |
|
684
|
|
|
|
|
685
|
30 |
|
if ($o > 0) { |
|
686
|
|
|
/* Sanity check: we need 6 bytes */ |
|
687
|
17 |
|
if ($o > $d->getSize() - 6) { |
|
688
|
2 |
|
Pel::maybeThrow(new PelIfdException('Bogus offset to next IFD: ' . '%d > %d!', $o, $d->getSize() - 6)); |
|
689
|
|
|
} else { |
|
690
|
16 |
|
if ($this->type == PelIfd::IFD1) { |
|
691
|
|
|
// IFD1 shouldn't link further... |
|
692
|
|
|
Pel::maybeThrow(new PelIfdException('IFD1 links to another IFD!')); |
|
693
|
|
|
} |
|
694
|
16 |
|
$this->next = new PelIfd(PelIfd::IFD1); |
|
695
|
17 |
|
$this->next->load($d, $o); |
|
696
|
|
|
} |
|
697
|
|
|
} else { |
|
698
|
29 |
|
Pel::debug('Last IFD.'); |
|
699
|
|
|
} |
|
700
|
30 |
|
} |
|
701
|
|
|
|
|
702
|
|
|
/** |
|
703
|
|
|
* Check if we finished loading IFD0 and EXIF IFD is set (EXIF IFD holds the MakerNotes) |
|
704
|
|
|
*/ |
|
705
|
30 |
|
private function checkIfLoadingFinished() |
|
706
|
|
|
{ |
|
707
|
30 |
|
if ($this->type == PelIfd::IFD0 && isset($this->sub[PelIfd::EXIF])) { |
|
708
|
|
|
// Get MakerNotes from EXIF IFD and check if they are set |
|
709
|
17 |
|
$mk = $this->sub[PelIfd::EXIF]->getMakerNotes(); |
|
710
|
17 |
|
if (! empty($mk)) { |
|
711
|
|
|
// get Make tag and load maker notes if tag is valid |
|
712
|
13 |
|
$manufacturer = $this->getEntry(PelTag::MAKE); |
|
713
|
13 |
|
if ($manufacturer !== null) { |
|
714
|
13 |
|
$manufacturer = $manufacturer->getValue(); |
|
715
|
13 |
|
$mkNotes = PelMakerNotes::createMakerNotesFromManufacturer($manufacturer, $mk['parent'], $mk['data'], $mk['components'], $mk['offset']); |
|
716
|
13 |
|
if ($mkNotes !== null) { |
|
717
|
|
|
// remove pre-loaded undefined MakerNotes |
|
718
|
3 |
|
$mk['parent']->offsetUnset(PelTag::MAKER_NOTE); |
|
719
|
3 |
|
$mkNotes->load(); |
|
720
|
|
|
} |
|
721
|
|
|
} |
|
722
|
|
|
} |
|
723
|
|
|
} |
|
724
|
30 |
|
} |
|
725
|
|
|
|
|
726
|
|
|
/** |
|
727
|
|
|
* Load a single value which didn't match any special {@link PelTag}. |
|
728
|
|
|
* |
|
729
|
|
|
* This method will add a single value given by the {@link PelDataWindow} and it's offset ($offset) and element counter ($i). |
|
730
|
|
|
* |
|
731
|
|
|
* Please note that the data you pass to this method should come |
|
732
|
|
|
* from an image, that is, it should be raw bytes. If instead you |
|
733
|
|
|
* want to create an entry for holding, say, an short integer, then |
|
734
|
|
|
* create a {@link PelEntryShort} object directly and load the data |
|
735
|
|
|
* into it. |
|
736
|
|
|
* |
|
737
|
|
|
* @param PelDataWindow $d |
|
738
|
|
|
* the data window that will provide the data. |
|
739
|
|
|
* @param integer $offset |
|
740
|
|
|
* the offset within the window where the directory will |
|
741
|
|
|
* be found. |
|
742
|
|
|
* @param integer $i |
|
743
|
|
|
* the element's position in the {@link PelDataWindow} $d. |
|
744
|
|
|
* @param integer $tag |
|
745
|
|
|
* the tag of the entry as defined in {@link PelTag}. |
|
746
|
|
|
* @throws PelException |
|
747
|
|
|
* @throws PelUnexpectedFormatException |
|
748
|
|
|
* @throws PelWrongComponentCountException |
|
749
|
|
|
*/ |
|
750
|
30 |
|
public function loadSingleValue($d, $offset, $i, $tag) |
|
751
|
|
|
{ |
|
752
|
30 |
|
$format = $d->getShort($offset + 12 * $i + 2); |
|
753
|
30 |
|
$components = $d->getLong($offset + 12 * $i + 4); |
|
754
|
30 |
|
$size = PelFormat::getSize($format); |
|
755
|
30 |
|
if (is_string($size)) { |
|
756
|
|
|
Pel::maybeThrow(new PelException('Invalid format %s', $format)); |
|
757
|
|
|
return; |
|
758
|
|
|
} |
|
759
|
|
|
|
|
760
|
|
|
try { |
|
761
|
|
|
/* |
|
762
|
|
|
* The data size. If bigger than 4 bytes, the actual data is |
|
763
|
|
|
* not in the entry but somewhere else, with the offset stored |
|
764
|
|
|
* in the entry. |
|
765
|
|
|
*/ |
|
766
|
30 |
|
$s = $size * $components; |
|
767
|
30 |
|
if ($s > 0) { |
|
768
|
30 |
|
$doff = $offset + 12 * $i + 8; |
|
769
|
30 |
|
if ($s > 4) { |
|
770
|
30 |
|
$doff = $d->getLong($doff); |
|
771
|
|
|
} |
|
772
|
30 |
|
$data = $d->getClone($doff, $s); |
|
773
|
|
|
} else { |
|
774
|
6 |
|
$data = new PelDataWindow(); |
|
775
|
|
|
} |
|
776
|
|
|
|
|
777
|
30 |
|
$entry = $this->newEntryFromData($tag, $format, $components, $data); |
|
778
|
30 |
|
$this->addEntry($entry); |
|
779
|
5 |
|
} catch (PelException $e) { |
|
780
|
|
|
/* |
|
781
|
|
|
* Throw the exception when running in strict mode, store |
|
782
|
|
|
* otherwise. |
|
783
|
|
|
*/ |
|
784
|
5 |
|
Pel::maybeThrow($e); |
|
785
|
|
|
} |
|
786
|
|
|
|
|
787
|
|
|
/* The format of the thumbnail is stored in this tag. */ |
|
788
|
|
|
// TODO: handle TIFF thumbnail. |
|
789
|
|
|
// if ($tag == PelTag::COMPRESSION) { |
|
790
|
|
|
// $this->thumb_format = $data->getShort(); |
|
791
|
|
|
// } |
|
792
|
30 |
|
} |
|
793
|
|
|
|
|
794
|
|
|
/** |
|
795
|
|
|
* Load a single value which didn't match any special {@link PelTag}. |
|
796
|
|
|
* |
|
797
|
|
|
* This method will add a single value given by the {@link PelDataWindow} and it's offset ($offset) and element counter ($i). |
|
798
|
|
|
* |
|
799
|
|
|
* Please note that the data you pass to this method should come |
|
800
|
|
|
* from an image, that is, it should be raw bytes. If instead you |
|
801
|
|
|
* want to create an entry for holding, say, an short integer, then |
|
802
|
|
|
* create a {@link PelEntryShort} object directly and load the data |
|
803
|
|
|
* into it. |
|
804
|
|
|
* |
|
805
|
|
|
* @param integer $type |
|
806
|
|
|
* the type of the ifd |
|
807
|
|
|
* @param PelDataWindow $data |
|
808
|
|
|
* the data window that will provide the data. |
|
809
|
|
|
* @param integer $offset |
|
810
|
|
|
* the offset within the window where the directory will |
|
811
|
|
|
* be found. |
|
812
|
|
|
* @param integer $size |
|
813
|
|
|
* the size in bytes of the maker notes section |
|
814
|
|
|
* @param integer $i |
|
815
|
|
|
* the element's position in the {@link PelDataWindow} $data. |
|
816
|
|
|
* @param integer $format |
|
817
|
|
|
* the format {@link PelFormat} of the entry. |
|
818
|
|
|
* @throws PelException |
|
819
|
|
|
* @throws PelDataWindowWindowException |
|
820
|
|
|
* @throws PelInvalidArgumentException |
|
821
|
|
|
*/ |
|
822
|
3 |
|
public function loadSingleMakerNotesValue($type, PelDataWindow $data, $offset, $size, $i, $format) |
|
|
|
|
|
|
823
|
|
|
{ |
|
824
|
3 |
|
$elemSize = PelFormat::getSize($format); |
|
825
|
3 |
|
if ($size > 0) { |
|
826
|
3 |
|
$subdata = $data->getClone($offset + $i * $elemSize, $elemSize); |
|
|
|
|
|
|
827
|
|
|
} else { |
|
828
|
|
|
$subdata = new PelDataWindow(); |
|
829
|
|
|
} |
|
830
|
|
|
|
|
831
|
|
|
try { |
|
832
|
3 |
|
$entry = $this->newEntryFromData($i + 1, $format, 1, $subdata); |
|
833
|
3 |
|
$this->addEntry($entry); |
|
834
|
|
|
} catch (PelException $e) { |
|
835
|
|
|
// Throw the exception when running in strict mode, store otherwise. |
|
836
|
|
|
Pel::maybeThrow($e); |
|
837
|
|
|
} |
|
838
|
|
|
|
|
839
|
|
|
/* The format of the thumbnail is stored in this tag. */ |
|
840
|
|
|
// TODO: handle TIFF thumbnail. |
|
841
|
|
|
// if ($tag == PelTag::COMPRESSION) { |
|
842
|
|
|
// $this->thumb_format = $data->getShort(); |
|
843
|
|
|
// } |
|
844
|
3 |
|
} |
|
845
|
|
|
|
|
846
|
|
|
/** |
|
847
|
|
|
* Make a new entry from a bunch of bytes. |
|
848
|
|
|
* |
|
849
|
|
|
* This method will create the proper subclass of {@link PelEntry} |
|
850
|
|
|
* corresponding to the {@link PelTag} and {@link PelFormat} given. |
|
851
|
|
|
* The entry will be initialized with the data given. |
|
852
|
|
|
* |
|
853
|
|
|
* Please note that the data you pass to this method should come |
|
854
|
|
|
* from an image, that is, it should be raw bytes. If instead you |
|
855
|
|
|
* want to create an entry for holding, say, an short integer, then |
|
856
|
|
|
* create a {@link PelEntryShort} object directly and load the data |
|
857
|
|
|
* into it. |
|
858
|
|
|
* |
|
859
|
|
|
* A {@link PelUnexpectedFormatException} is thrown if a mismatch is |
|
860
|
|
|
* discovered between the tag and format, and likewise a {@link |
|
861
|
|
|
* PelWrongComponentCountException} is thrown if the number of |
|
862
|
|
|
* components does not match the requirements of the tag. The |
|
863
|
|
|
* requirements for a given tag (if any) can be found in the |
|
864
|
|
|
* documentation for {@link PelTag}. |
|
865
|
|
|
* |
|
866
|
|
|
* @param integer $tag |
|
867
|
|
|
* the tag of the entry as defined in {@link PelTag}. |
|
868
|
|
|
* @param integer $format |
|
869
|
|
|
* the format of the entry as defined in {@link PelFormat}. |
|
870
|
|
|
* @param integer $components |
|
871
|
|
|
* the components in the entry. |
|
872
|
|
|
* @param PelDataWindow $data |
|
873
|
|
|
* the data which will be used to construct the |
|
874
|
|
|
* entry. |
|
875
|
|
|
* @return PelEntry a newly created entry, holding the data given. |
|
876
|
|
|
* @throws PelException |
|
877
|
|
|
* @throws PelUnexpectedFormatException |
|
878
|
|
|
* @throws PelWrongComponentCountException |
|
879
|
|
|
*/ |
|
880
|
30 |
|
public function newEntryFromData($tag, $format, $components, PelDataWindow $data) |
|
881
|
|
|
{ |
|
882
|
|
|
|
|
883
|
|
|
/* |
|
884
|
|
|
* First handle tags for which we have a specific PelEntryXXX |
|
885
|
|
|
* class. |
|
886
|
|
|
*/ |
|
887
|
30 |
|
switch ($this->type) { |
|
888
|
30 |
|
case self::IFD0: |
|
889
|
19 |
|
case self::IFD1: |
|
890
|
19 |
|
case self::EXIF: |
|
891
|
12 |
|
case self::INTEROPERABILITY: |
|
892
|
30 |
|
switch ($tag) { |
|
893
|
|
|
case PelTag::DATE_TIME: |
|
894
|
|
|
case PelTag::DATE_TIME_ORIGINAL: |
|
895
|
|
|
case PelTag::DATE_TIME_DIGITIZED: |
|
896
|
19 |
|
if ($format != PelFormat::ASCII) { |
|
897
|
|
|
throw new PelUnexpectedFormatException($this->type, $tag, $format, PelFormat::ASCII); |
|
898
|
|
|
} |
|
899
|
19 |
|
if ($components != 20) { |
|
900
|
3 |
|
throw new PelWrongComponentCountException($this->type, $tag, $components, 20); |
|
901
|
|
|
} |
|
902
|
|
|
// TODO: handle timezones. |
|
903
|
16 |
|
return new PelEntryTime($tag, $data->getBytes(0, - 1), PelEntryTime::EXIF_STRING); |
|
904
|
|
|
|
|
905
|
|
|
case PelTag::COPYRIGHT: |
|
906
|
3 |
|
if ($format != PelFormat::ASCII) { |
|
907
|
|
|
throw new PelUnexpectedFormatException($this->type, $tag, $format, PelFormat::ASCII); |
|
908
|
|
|
} |
|
909
|
3 |
|
$v = explode("\0", trim($data->getBytes(), ' ')); |
|
910
|
3 |
|
if (! isset($v[1])) { |
|
911
|
1 |
|
Pel::maybeThrow(new PelException('Invalid copyright: %s', $data->getBytes())); |
|
912
|
|
|
// when not in strict mode, set empty copyright and continue |
|
913
|
1 |
|
$v[1] = ''; |
|
914
|
|
|
} |
|
915
|
3 |
|
return new PelEntryCopyright($v[0], $v[1]); |
|
916
|
|
|
|
|
917
|
|
|
case PelTag::EXIF_VERSION: |
|
918
|
|
|
case PelTag::FLASH_PIX_VERSION: |
|
919
|
|
|
case PelTag::INTEROPERABILITY_VERSION: |
|
920
|
19 |
|
if ($format != PelFormat::UNDEFINED) { |
|
921
|
1 |
|
throw new PelUnexpectedFormatException($this->type, $tag, $format, PelFormat::UNDEFINED); |
|
922
|
|
|
} |
|
923
|
18 |
|
return new PelEntryVersion($tag, (float) $data->getBytes() / 100); |
|
924
|
|
|
|
|
925
|
|
|
case PelTag::USER_COMMENT: |
|
926
|
10 |
|
if ($format != PelFormat::UNDEFINED) { |
|
927
|
|
|
throw new PelUnexpectedFormatException($this->type, $tag, $format, PelFormat::UNDEFINED); |
|
928
|
|
|
} |
|
929
|
10 |
|
if ($data->getSize() < 8) { |
|
930
|
|
|
return new PelEntryUserComment(); |
|
931
|
|
|
} else { |
|
932
|
10 |
|
return new PelEntryUserComment($data->getBytes(8), rtrim($data->getBytes(0, 8))); |
|
933
|
|
|
} |
|
934
|
|
|
// this point can not be reached |
|
935
|
|
|
case PelTag::XP_TITLE: |
|
936
|
|
|
case PelTag::XP_COMMENT: |
|
937
|
|
|
case PelTag::XP_AUTHOR: |
|
938
|
|
|
case PelTag::XP_KEYWORDS: |
|
939
|
|
|
case PelTag::XP_SUBJECT: |
|
940
|
3 |
|
if ($format != PelFormat::BYTE) { |
|
941
|
|
|
throw new PelUnexpectedFormatException($this->type, $tag, $format, PelFormat::BYTE); |
|
942
|
|
|
} |
|
943
|
3 |
|
return new PelEntryWindowsString($tag, $data->getBytes(), true); |
|
944
|
|
|
} |
|
945
|
|
|
// This point can be reached! Continue with default. |
|
946
|
4 |
|
case self::GPS: |
|
947
|
|
|
default: |
|
948
|
|
|
/* Then handle the basic formats. */ |
|
949
|
28 |
|
switch ($format) { |
|
950
|
|
|
case PelFormat::BYTE: |
|
951
|
4 |
|
$v = new PelEntryByte($tag); |
|
952
|
4 |
|
for ($i = 0; $i < $components; $i ++) { |
|
953
|
4 |
|
$v->addNumber($data->getByte($i)); |
|
954
|
|
|
} |
|
955
|
4 |
|
return $v; |
|
956
|
|
|
|
|
957
|
|
|
case PelFormat::SBYTE: |
|
958
|
1 |
|
$v = new PelEntrySByte($tag); |
|
959
|
1 |
|
for ($i = 0; $i < $components; $i ++) { |
|
960
|
1 |
|
$v->addNumber($data->getSByte($i)); |
|
961
|
|
|
} |
|
962
|
1 |
|
return $v; |
|
963
|
|
|
|
|
964
|
|
|
case PelFormat::ASCII: |
|
965
|
|
|
// cut off string after the first nul byte |
|
966
|
21 |
|
$canonicalString = strstr($data->getBytes(0), "\0", true); |
|
967
|
21 |
|
if ($canonicalString !== false) { |
|
968
|
20 |
|
return new PelEntryAscii($tag, $canonicalString); |
|
969
|
|
|
} |
|
970
|
|
|
// TODO throw exception if string isn't nul-terminated |
|
971
|
1 |
|
return new PelEntryAscii($tag, $data->getBytes(0)); |
|
972
|
|
|
|
|
973
|
|
|
case PelFormat::SHORT: |
|
974
|
20 |
|
$v = new PelEntryShort($tag); |
|
975
|
20 |
|
for ($i = 0; $i < $components; $i ++) { |
|
976
|
20 |
|
$v->addNumber($data->getShort($i * 2)); |
|
977
|
|
|
} |
|
978
|
20 |
|
return $v; |
|
979
|
|
|
|
|
980
|
|
|
case PelFormat::SSHORT: |
|
981
|
4 |
|
$v = new PelEntrySShort($tag); |
|
982
|
4 |
|
for ($i = 0; $i < $components; $i ++) { |
|
983
|
4 |
|
$v->addNumber($data->getSShort($i * 2)); |
|
984
|
|
|
} |
|
985
|
4 |
|
return $v; |
|
986
|
|
|
|
|
987
|
|
|
case PelFormat::LONG: |
|
988
|
16 |
|
$v = new PelEntryLong($tag); |
|
989
|
16 |
|
for ($i = 0; $i < $components; $i ++) { |
|
990
|
16 |
|
$v->addNumber($data->getLong($i * 4)); |
|
991
|
|
|
} |
|
992
|
16 |
|
return $v; |
|
993
|
|
|
|
|
994
|
|
|
case PelFormat::SLONG: |
|
995
|
1 |
|
$v = new PelEntrySLong($tag); |
|
996
|
1 |
|
for ($i = 0; $i < $components; $i ++) { |
|
997
|
1 |
|
$v->addNumber($data->getSLong($i * 4)); |
|
998
|
|
|
} |
|
999
|
1 |
|
return $v; |
|
1000
|
|
|
|
|
1001
|
|
|
case PelFormat::RATIONAL: |
|
1002
|
17 |
|
$v = new PelEntryRational($tag); |
|
1003
|
17 |
|
for ($i = 0; $i < $components; $i ++) { |
|
1004
|
17 |
|
$v->addNumber($data->getRational($i * 8)); |
|
1005
|
|
|
} |
|
1006
|
17 |
|
return $v; |
|
1007
|
|
|
|
|
1008
|
|
|
case PelFormat::SRATIONAL: |
|
1009
|
16 |
|
$v = new PelEntrySRational($tag); |
|
1010
|
16 |
|
for ($i = 0; $i < $components; $i ++) { |
|
1011
|
16 |
|
$v->addNumber($data->getSRational($i * 8)); |
|
1012
|
|
|
} |
|
1013
|
16 |
|
return $v; |
|
1014
|
|
|
|
|
1015
|
|
|
case PelFormat::UNDEFINED: |
|
1016
|
16 |
|
return new PelEntryUndefined($tag, $data->getBytes()); |
|
1017
|
|
|
|
|
1018
|
|
|
default: |
|
1019
|
|
|
throw new PelException('Unsupported format: %s', PelFormat::getName($format)); |
|
1020
|
|
|
} |
|
1021
|
|
|
} |
|
1022
|
|
|
} |
|
1023
|
|
|
|
|
1024
|
|
|
/** |
|
1025
|
|
|
* Extract thumbnail data safely. |
|
1026
|
|
|
* |
|
1027
|
|
|
* It is safe to call this method repeatedly with either the offset |
|
1028
|
|
|
* or the length set to zero, since it requires both of these |
|
1029
|
|
|
* arguments to be positive before the thumbnail is extracted. |
|
1030
|
|
|
* |
|
1031
|
|
|
* When both parameters are set it will check the length against the |
|
1032
|
|
|
* available data and adjust as necessary. Only then is the |
|
1033
|
|
|
* thumbnail data loaded. |
|
1034
|
|
|
* |
|
1035
|
|
|
* @param PelDataWindow $d |
|
1036
|
|
|
* the data from which the thumbnail will be |
|
1037
|
|
|
* extracted. |
|
1038
|
|
|
* @param integer $offset |
|
1039
|
|
|
* the offset into the data. |
|
1040
|
|
|
* @param integer $length |
|
1041
|
|
|
* the length of the thumbnail. |
|
1042
|
|
|
* @throws PelIfdException |
|
1043
|
|
|
* @throws PelDataWindowWindowException |
|
1044
|
|
|
*/ |
|
1045
|
15 |
|
private function safeSetThumbnail(PelDataWindow $d, $offset, $length) |
|
1046
|
|
|
{ |
|
1047
|
|
|
/* |
|
1048
|
|
|
* Load the thumbnail if both the offset and the length is |
|
1049
|
|
|
* available. |
|
1050
|
|
|
*/ |
|
1051
|
15 |
|
if ($offset > 0 && $length > 0) { |
|
1052
|
|
|
/* |
|
1053
|
|
|
* Some images have a broken length, so we try to carefully |
|
1054
|
|
|
* check the length before we store the thumbnail. |
|
1055
|
|
|
*/ |
|
1056
|
15 |
|
if ($offset + $length > $d->getSize()) { |
|
1057
|
1 |
|
Pel::maybeThrow(new PelIfdException('Thumbnail length %d bytes ' . 'adjusted to %d bytes.', $length, $d->getSize() - $offset)); |
|
1058
|
1 |
|
$length = $d->getSize() - $offset; |
|
1059
|
|
|
} |
|
1060
|
|
|
|
|
1061
|
|
|
/* Now set the thumbnail normally. */ |
|
1062
|
|
|
try { |
|
1063
|
15 |
|
$this->setThumbnail($d->getClone($offset, $length)); |
|
1064
|
1 |
|
} catch (PelDataWindowWindowException $e) { |
|
1065
|
1 |
|
Pel::maybeThrow(new PelIfdException($e->getMessage())); |
|
1066
|
|
|
} |
|
1067
|
|
|
} |
|
1068
|
15 |
|
} |
|
1069
|
|
|
|
|
1070
|
|
|
/** |
|
1071
|
|
|
* Set thumbnail data. |
|
1072
|
|
|
* |
|
1073
|
|
|
* Use this to embed an arbitrary JPEG image within this IFD. The |
|
1074
|
|
|
* data will be checked to ensure that it has a proper {@link |
|
1075
|
|
|
* PelJpegMarker::EOI} at the end. If not, then the length is |
|
1076
|
|
|
* adjusted until one if found. An {@link PelIfdException} might be |
|
1077
|
|
|
* thrown (depending on {@link Pel::$strict}) this case. |
|
1078
|
|
|
* |
|
1079
|
|
|
* @param PelDataWindow $d |
|
1080
|
|
|
* the thumbnail data. |
|
1081
|
|
|
* @throws PelIfdException |
|
1082
|
|
|
*/ |
|
1083
|
14 |
|
public function setThumbnail(PelDataWindow $d) |
|
1084
|
|
|
{ |
|
1085
|
14 |
|
$size = $d->getSize(); |
|
1086
|
|
|
/* Now move backwards until we find the EOI JPEG marker. */ |
|
1087
|
14 |
|
while ($d->getByte($size - 2) != 0xFF || $d->getByte($size - 1) != PelJpegMarker::EOI) { |
|
1088
|
1 |
|
$size --; |
|
1089
|
|
|
} |
|
1090
|
|
|
|
|
1091
|
14 |
|
if ($size != $d->getSize()) { |
|
1092
|
1 |
|
Pel::maybeThrow(new PelIfdException('Decrementing thumbnail size ' . 'to %d bytes', $size)); |
|
1093
|
|
|
} |
|
1094
|
14 |
|
$this->thumb_data = $d->getClone(0, $size); |
|
1095
|
14 |
|
} |
|
1096
|
|
|
|
|
1097
|
|
|
/** |
|
1098
|
|
|
* Get the type of this directory. |
|
1099
|
|
|
* |
|
1100
|
|
|
* @return int of {@link PelIfd::IFD0}, {@link PelIfd::IFD1}, {@link |
|
1101
|
|
|
* PelIfd::EXIF}, {@link PelIfd::GPS}, or {@link |
|
1102
|
|
|
* PelIfd::INTEROPERABILITY}. |
|
1103
|
|
|
*/ |
|
1104
|
8 |
|
public function getType() |
|
1105
|
|
|
{ |
|
1106
|
8 |
|
return $this->type; |
|
1107
|
|
|
} |
|
1108
|
|
|
|
|
1109
|
|
|
/** |
|
1110
|
|
|
* Is a given tag valid for this IFD? |
|
1111
|
|
|
* |
|
1112
|
|
|
* Different types of IFDs can contain different kinds of tags --- |
|
1113
|
|
|
* the {@link IFD0} type, for example, cannot contain a {@link |
|
1114
|
|
|
* PelTag::GPS_LONGITUDE} tag. |
|
1115
|
|
|
* |
|
1116
|
|
|
* A special exception is tags with values above 0xF000. They are |
|
1117
|
|
|
* treated as private tags and will be allowed everywhere (use this |
|
1118
|
|
|
* for testing or for implementing your own types of tags). |
|
1119
|
|
|
* |
|
1120
|
|
|
* @param integer $tag |
|
1121
|
|
|
* the tag. |
|
1122
|
|
|
* @return boolean true if the tag is considered valid in this IFD, |
|
1123
|
|
|
* false otherwise. |
|
1124
|
|
|
* @see getValidTags() |
|
1125
|
|
|
*/ |
|
1126
|
31 |
|
public function isValidTag($tag) |
|
1127
|
|
|
{ |
|
1128
|
31 |
|
return $tag > 0xF000 || in_array($tag, $this->getValidTags()); |
|
1129
|
|
|
} |
|
1130
|
|
|
|
|
1131
|
|
|
/** |
|
1132
|
|
|
* Returns a list of valid tags for this IFD. |
|
1133
|
|
|
* |
|
1134
|
|
|
* @return array an array of {@link PelTag}s which are valid for |
|
1135
|
|
|
* this IFD. |
|
1136
|
|
|
*/ |
|
1137
|
24 |
|
public function getValidTags() |
|
1138
|
|
|
{ |
|
1139
|
24 |
|
$tp = $this->type; |
|
1140
|
24 |
|
if ($tp === self::IFD1) { |
|
1141
|
|
|
// return the same for IFD0 and IFD1 |
|
1142
|
13 |
|
$tp = self::IFD0; |
|
1143
|
|
|
} |
|
1144
|
24 |
|
if (array_key_exists($tp, self::VALID_TAGS)) { |
|
1145
|
24 |
|
return self::VALID_TAGS[$tp]; |
|
1146
|
|
|
} |
|
1147
|
|
|
return []; |
|
1148
|
|
|
} |
|
1149
|
|
|
|
|
1150
|
|
|
/** |
|
1151
|
|
|
* Get the name of an IFD type. |
|
1152
|
|
|
* |
|
1153
|
|
|
* @param integer $type |
|
1154
|
|
|
* one of {@link PelIfd::IFD0}, {@link PelIfd::IFD1}, |
|
1155
|
|
|
* {@link PelIfd::EXIF}, {@link PelIfd::GPS}, or {@link |
|
1156
|
|
|
* PelIfd::INTEROPERABILITY}. |
|
1157
|
|
|
* @return string the name of type. |
|
1158
|
|
|
*/ |
|
1159
|
2 |
|
public static function getTypeName($type) |
|
1160
|
|
|
{ |
|
1161
|
2 |
|
if (array_key_exists($type, self::TYPE_NAMES)) { |
|
1162
|
2 |
|
return self::TYPE_NAMES[$type]; |
|
1163
|
|
|
} |
|
1164
|
|
|
throw new PelIfdException('Unknown IFD type: %d', $type); |
|
1165
|
|
|
} |
|
1166
|
|
|
|
|
1167
|
|
|
/** |
|
1168
|
|
|
* Get the name of this directory. |
|
1169
|
|
|
* |
|
1170
|
|
|
* @return string the name of this directory. |
|
1171
|
|
|
*/ |
|
1172
|
2 |
|
public function getName() |
|
1173
|
|
|
{ |
|
1174
|
2 |
|
return $this->getTypeName($this->type); |
|
1175
|
|
|
} |
|
1176
|
|
|
|
|
1177
|
|
|
/** |
|
1178
|
|
|
* Adds an entry to the directory. |
|
1179
|
|
|
* |
|
1180
|
|
|
* @param PelEntry $e |
|
1181
|
|
|
* the entry that will be added. If the entry is not |
|
1182
|
|
|
* valid in this IFD (as per {@link isValidTag()}) an |
|
1183
|
|
|
* {@link PelInvalidDataException} is thrown. |
|
1184
|
|
|
* @todo The entry will be identified with its tag, so each |
|
1185
|
|
|
* directory can only contain one entry with each tag. Is this a |
|
1186
|
|
|
* bug? |
|
1187
|
|
|
*/ |
|
1188
|
31 |
|
public function addEntry(PelEntry $e) |
|
1189
|
|
|
{ |
|
1190
|
31 |
|
if ($this->isValidTag($e->getTag())) { |
|
1191
|
31 |
|
$e->setIfdType($this->type); |
|
1192
|
31 |
|
$this->entries[$e->getTag()] = $e; |
|
1193
|
|
|
} else { |
|
1194
|
2 |
|
throw new PelInvalidDataException("IFD %s cannot hold\n%s", $this->getName(), $e->__toString()); |
|
1195
|
|
|
} |
|
1196
|
31 |
|
} |
|
1197
|
|
|
|
|
1198
|
|
|
/** |
|
1199
|
|
|
* Does a given tag exist in this IFD? |
|
1200
|
|
|
* |
|
1201
|
|
|
* This methods is part of the ArrayAccess SPL interface for |
|
1202
|
|
|
* overriding array access of objects, it allows you to check for |
|
1203
|
|
|
* existance of an entry in the IFD: |
|
1204
|
|
|
* |
|
1205
|
|
|
* <code> |
|
1206
|
|
|
* if (isset($ifd[PelTag::FNUMBER])) |
|
1207
|
|
|
* // ... do something with the F-number. |
|
1208
|
|
|
* </code> |
|
1209
|
|
|
* |
|
1210
|
|
|
* @param integer $tag |
|
1211
|
|
|
* the offset to check. |
|
1212
|
|
|
* @return boolean whether the tag exists. |
|
1213
|
|
|
*/ |
|
1214
|
1 |
|
public function offsetExists($tag): bool |
|
1215
|
|
|
{ |
|
1216
|
1 |
|
return isset($this->entries[$tag]); |
|
1217
|
|
|
} |
|
1218
|
|
|
|
|
1219
|
|
|
/** |
|
1220
|
|
|
* Retrieve a given tag from this IFD. |
|
1221
|
|
|
* |
|
1222
|
|
|
* This methods is part of the ArrayAccess SPL interface for |
|
1223
|
|
|
* overriding array access of objects, it allows you to read entries |
|
1224
|
|
|
* from the IFD the same was as for an array: |
|
1225
|
|
|
* |
|
1226
|
|
|
* <code> |
|
1227
|
|
|
* $entry = $ifd[PelTag::FNUMBER]; |
|
1228
|
|
|
* </code> |
|
1229
|
|
|
* |
|
1230
|
|
|
* @param integer $tag |
|
1231
|
|
|
* the tag to return. It is an error to ask for a tag |
|
1232
|
|
|
* which is not in the IFD, just like asking for a non-existant |
|
1233
|
|
|
* array entry. |
|
1234
|
|
|
* @return PelEntry the entry. |
|
1235
|
|
|
*/ |
|
1236
|
1 |
|
public function offsetGet($tag): PelEntry |
|
1237
|
|
|
{ |
|
1238
|
1 |
|
return $this->entries[$tag]; |
|
1239
|
|
|
} |
|
1240
|
|
|
|
|
1241
|
|
|
/** |
|
1242
|
|
|
* Set or update a given tag in this IFD. |
|
1243
|
|
|
* |
|
1244
|
|
|
* This methods is part of the ArrayAccess SPL interface for |
|
1245
|
|
|
* overriding array access of objects, it allows you to add new |
|
1246
|
|
|
* entries or replace esisting entries by doing: |
|
1247
|
|
|
* |
|
1248
|
|
|
* <code> |
|
1249
|
|
|
* $ifd[PelTag::EXPOSURE_BIAS_VALUE] = $entry; |
|
1250
|
|
|
* </code> |
|
1251
|
|
|
* |
|
1252
|
|
|
* Note that the actual array index passed is ignored! Instead the |
|
1253
|
|
|
* {@link PelTag} from the entry is used. |
|
1254
|
|
|
* |
|
1255
|
|
|
* @param integer $tag |
|
1256
|
|
|
* unused. |
|
1257
|
|
|
* @param PelEntry $e |
|
1258
|
|
|
* the new value. |
|
1259
|
|
|
* @throws PelInvalidArgumentException |
|
1260
|
|
|
*/ |
|
1261
|
1 |
|
public function offsetSet($tag, $e): void |
|
1262
|
|
|
{ |
|
1263
|
1 |
|
if ($e instanceof PelEntry) { |
|
|
|
|
|
|
1264
|
1 |
|
$tag = $e->getTag(); |
|
1265
|
1 |
|
$this->entries[$tag] = $e; |
|
1266
|
|
|
} else { |
|
1267
|
|
|
throw new PelInvalidArgumentException('Argument "%s" must be a PelEntry.', $e); |
|
1268
|
|
|
} |
|
1269
|
1 |
|
} |
|
1270
|
|
|
|
|
1271
|
|
|
/** |
|
1272
|
|
|
* Unset a given tag in this IFD. |
|
1273
|
|
|
* |
|
1274
|
|
|
* This methods is part of the ArrayAccess SPL interface for |
|
1275
|
|
|
* overriding array access of objects, it allows you to delete |
|
1276
|
|
|
* entries in the IFD by doing: |
|
1277
|
|
|
* |
|
1278
|
|
|
* <code> |
|
1279
|
|
|
* unset($ifd[PelTag::EXPOSURE_BIAS_VALUE]) |
|
1280
|
|
|
* </code> |
|
1281
|
|
|
* |
|
1282
|
|
|
* @param integer $offset |
|
1283
|
|
|
* the offset to delete. |
|
1284
|
|
|
*/ |
|
1285
|
|
|
# [\ReturnTypeWillChange] |
|
1286
|
4 |
|
public function offsetUnset($offset): void |
|
1287
|
|
|
{ |
|
1288
|
4 |
|
unset($this->entries[$offset]); |
|
1289
|
4 |
|
} |
|
1290
|
|
|
|
|
1291
|
|
|
/** |
|
1292
|
|
|
* Retrieve an entry. |
|
1293
|
|
|
* |
|
1294
|
|
|
* @param integer $tag |
|
1295
|
|
|
* the tag identifying the entry. |
|
1296
|
|
|
* @return PelEntry the entry associated with the tag, or null if no |
|
1297
|
|
|
* such entry exists. |
|
1298
|
|
|
*/ |
|
1299
|
25 |
|
public function getEntry($tag) |
|
1300
|
|
|
{ |
|
1301
|
25 |
|
if (isset($this->entries[$tag])) { |
|
1302
|
24 |
|
return $this->entries[$tag]; |
|
1303
|
|
|
} else { |
|
1304
|
4 |
|
return null; |
|
1305
|
|
|
} |
|
1306
|
|
|
} |
|
1307
|
|
|
|
|
1308
|
|
|
/** |
|
1309
|
|
|
* Returns all entries contained in this IFD. |
|
1310
|
|
|
* |
|
1311
|
|
|
* @return array an array of {@link PelEntry} objects, or rather |
|
1312
|
|
|
* descendant classes. The array has {@link PelTag}s as keys |
|
1313
|
|
|
* and the entries as values. |
|
1314
|
|
|
* @see PelIfd::getEntry |
|
1315
|
|
|
* @see PelIfd::getIterator |
|
1316
|
|
|
*/ |
|
1317
|
12 |
|
public function getEntries() |
|
1318
|
|
|
{ |
|
1319
|
12 |
|
return $this->entries; |
|
1320
|
|
|
} |
|
1321
|
|
|
|
|
1322
|
|
|
/** |
|
1323
|
|
|
* Return an iterator for all entries contained in this IFD. |
|
1324
|
|
|
* |
|
1325
|
|
|
* Used with foreach as in |
|
1326
|
|
|
* |
|
1327
|
|
|
* <code> |
|
1328
|
|
|
* foreach ($ifd as $tag => $entry) { |
|
1329
|
|
|
* // $tag is now a PelTag and $entry is a PelEntry object. |
|
1330
|
|
|
* } |
|
1331
|
|
|
* </code> |
|
1332
|
|
|
* |
|
1333
|
|
|
* @return \ArrayIterator an iterator using the {@link PelTag tags} as |
|
1334
|
|
|
* keys and the entries as values. |
|
1335
|
|
|
*/ |
|
1336
|
2 |
|
public function getIterator(): \ArrayIterator |
|
1337
|
|
|
{ |
|
1338
|
2 |
|
return new \ArrayIterator($this->entries); |
|
1339
|
|
|
} |
|
1340
|
|
|
|
|
1341
|
|
|
/** |
|
1342
|
|
|
* Returns available thumbnail data. |
|
1343
|
|
|
* |
|
1344
|
|
|
* @return string the bytes in the thumbnail, if any. If the IFD |
|
1345
|
|
|
* does not contain any thumbnail data, the empty string is |
|
1346
|
|
|
* returned. |
|
1347
|
|
|
* @throws PelDataWindowOffsetException |
|
1348
|
|
|
* @todo Throw an exception instead when no data is available? |
|
1349
|
|
|
* @todo Return the $this->thumb_data object instead of the bytes? |
|
1350
|
|
|
*/ |
|
1351
|
12 |
|
public function getThumbnailData() |
|
1352
|
|
|
{ |
|
1353
|
12 |
|
if ($this->thumb_data !== null) { |
|
1354
|
11 |
|
return $this->thumb_data->getBytes(); |
|
1355
|
|
|
} else { |
|
1356
|
12 |
|
return ''; |
|
1357
|
|
|
} |
|
1358
|
|
|
} |
|
1359
|
|
|
|
|
1360
|
|
|
/** |
|
1361
|
|
|
* Make this directory point to a new directory. |
|
1362
|
|
|
* |
|
1363
|
|
|
* @param PelIfd $i |
|
1364
|
|
|
* the IFD that this directory will point to. |
|
1365
|
|
|
*/ |
|
1366
|
|
|
public function setNextIfd(PelIfd $i) |
|
1367
|
|
|
{ |
|
1368
|
|
|
$this->next = $i; |
|
1369
|
|
|
} |
|
1370
|
|
|
|
|
1371
|
|
|
/** |
|
1372
|
|
|
* Return the IFD pointed to by this directory. |
|
1373
|
|
|
* |
|
1374
|
|
|
* @return PelIfd the next IFD, following this IFD. If this is the |
|
1375
|
|
|
* last IFD, null is returned. |
|
1376
|
|
|
*/ |
|
1377
|
12 |
|
public function getNextIfd() |
|
1378
|
|
|
{ |
|
1379
|
12 |
|
return $this->next; |
|
1380
|
|
|
} |
|
1381
|
|
|
|
|
1382
|
|
|
/** |
|
1383
|
|
|
* Check if this is the last IFD. |
|
1384
|
|
|
* |
|
1385
|
|
|
* @return boolean true if there are no following IFD, false |
|
1386
|
|
|
* otherwise. |
|
1387
|
|
|
*/ |
|
1388
|
11 |
|
public function isLastIfd() |
|
1389
|
|
|
{ |
|
1390
|
11 |
|
return $this->next === null; |
|
1391
|
|
|
} |
|
1392
|
|
|
|
|
1393
|
|
|
/** |
|
1394
|
|
|
* Add a sub-IFD. |
|
1395
|
|
|
* |
|
1396
|
|
|
* Any previous sub-IFD of the same type will be overwritten. |
|
1397
|
|
|
* |
|
1398
|
|
|
* @param PelIfd $sub |
|
1399
|
|
|
* the sub IFD. The type of must be one of {@link |
|
1400
|
|
|
* PelIfd::EXIF}, {@link PelIfd::GPS}, or {@link |
|
1401
|
|
|
* PelIfd::INTEROPERABILITY}. |
|
1402
|
|
|
*/ |
|
1403
|
3 |
|
public function addSubIfd(PelIfd $sub) |
|
1404
|
|
|
{ |
|
1405
|
3 |
|
$this->sub[$sub->type] = $sub; |
|
1406
|
3 |
|
} |
|
1407
|
|
|
|
|
1408
|
|
|
/** |
|
1409
|
|
|
* Return a sub IFD. |
|
1410
|
|
|
* |
|
1411
|
|
|
* @param integer $type |
|
1412
|
|
|
* the type of the sub IFD. This must be one of {@link |
|
1413
|
|
|
* PelIfd::EXIF}, {@link PelIfd::GPS}, or {@link |
|
1414
|
|
|
* PelIfd::INTEROPERABILITY}. |
|
1415
|
|
|
* @return PelIfd the IFD associated with the type, or null if that |
|
1416
|
|
|
* sub IFD does not exist. |
|
1417
|
|
|
*/ |
|
1418
|
13 |
|
public function getSubIfd($type) |
|
1419
|
|
|
{ |
|
1420
|
13 |
|
if (isset($this->sub[$type])) { |
|
1421
|
13 |
|
return $this->sub[$type]; |
|
1422
|
|
|
} else { |
|
1423
|
|
|
return null; |
|
1424
|
|
|
} |
|
1425
|
|
|
} |
|
1426
|
|
|
|
|
1427
|
|
|
/** |
|
1428
|
|
|
* Get all sub IFDs. |
|
1429
|
|
|
* |
|
1430
|
|
|
* @return array an associative array with (IFD-type, {@link |
|
1431
|
|
|
* PelIfd}) pairs. |
|
1432
|
|
|
*/ |
|
1433
|
12 |
|
public function getSubIfds() |
|
1434
|
|
|
{ |
|
1435
|
12 |
|
return $this->sub; |
|
1436
|
|
|
} |
|
1437
|
|
|
|
|
1438
|
|
|
/** |
|
1439
|
|
|
* Turn this directory into bytes. |
|
1440
|
|
|
* |
|
1441
|
|
|
* This directory will be turned into a byte string, with the |
|
1442
|
|
|
* specified byte order. The offsets will be calculated from the |
|
1443
|
|
|
* offset given. |
|
1444
|
|
|
* |
|
1445
|
|
|
* @param integer $offset |
|
1446
|
|
|
* the offset of the first byte of this directory. |
|
1447
|
|
|
* @param boolean $order |
|
1448
|
|
|
* the byte order that should be used when |
|
1449
|
|
|
* turning integers into bytes. This should be one of {@link |
|
1450
|
|
|
* PelConvert::LITTLE_ENDIAN} and {@link PelConvert::BIG_ENDIAN}. |
|
1451
|
|
|
*/ |
|
1452
|
11 |
|
public function getBytes($offset, $order) |
|
1453
|
|
|
{ |
|
1454
|
11 |
|
$bytes = ''; |
|
1455
|
11 |
|
$extra_bytes = ''; |
|
1456
|
|
|
|
|
1457
|
11 |
|
Pel::debug('Bytes from IDF will start at offset %d within Exif data', $offset); |
|
1458
|
|
|
|
|
1459
|
11 |
|
$n = count($this->entries) + count($this->sub); |
|
1460
|
11 |
|
if ($this->thumb_data !== null) { |
|
1461
|
|
|
/* |
|
1462
|
|
|
* We need two extra entries for the thumbnail offset and |
|
1463
|
|
|
* length. |
|
1464
|
|
|
*/ |
|
1465
|
|
|
$n += 2; |
|
1466
|
|
|
} |
|
1467
|
|
|
|
|
1468
|
11 |
|
$bytes .= PelConvert::shortToBytes($n, $order); |
|
1469
|
|
|
|
|
1470
|
|
|
/* |
|
1471
|
|
|
* Initialize offset of extra data. This included the bytes |
|
1472
|
|
|
* preceding this IFD, the bytes needed for the count of entries, |
|
1473
|
|
|
* the entries themselves (and sub entries), the extra data in the |
|
1474
|
|
|
* entries, and the IFD link. |
|
1475
|
|
|
*/ |
|
1476
|
11 |
|
$end = $offset + 2 + 12 * $n + 4; |
|
1477
|
|
|
|
|
1478
|
11 |
|
foreach ($this->entries as $tag => $entry) { |
|
1479
|
|
|
/* Each entry is 12 bytes long. */ |
|
1480
|
11 |
|
$bytes .= PelConvert::shortToBytes($entry->getTag(), $order); |
|
1481
|
11 |
|
$bytes .= PelConvert::shortToBytes($entry->getFormat(), $order); |
|
1482
|
11 |
|
$bytes .= PelConvert::longToBytes($entry->getComponents(), $order); |
|
1483
|
|
|
|
|
1484
|
|
|
/* |
|
1485
|
|
|
* Size? If bigger than 4 bytes, the actual data is not in |
|
1486
|
|
|
* the entry but somewhere else. |
|
1487
|
|
|
*/ |
|
1488
|
11 |
|
$data = $entry->getBytes($order); |
|
1489
|
11 |
|
$s = strlen($data); |
|
1490
|
11 |
|
if ($s > 4) { |
|
1491
|
11 |
|
Pel::debug('Data size %d too big, storing at offset %d instead.', $s, $end); |
|
1492
|
11 |
|
$bytes .= PelConvert::longToBytes($end, $order); |
|
1493
|
11 |
|
$extra_bytes .= $data; |
|
1494
|
11 |
|
$end += $s; |
|
1495
|
|
|
} else { |
|
1496
|
8 |
|
Pel::debug('Data size %d fits.', $s); |
|
1497
|
|
|
/* |
|
1498
|
|
|
* Copy data directly, pad with NULL bytes as necessary to |
|
1499
|
|
|
* fill out the four bytes available. |
|
1500
|
|
|
*/ |
|
1501
|
11 |
|
$bytes .= $data . str_repeat(chr(0), 4 - $s); |
|
1502
|
|
|
} |
|
1503
|
|
|
} |
|
1504
|
|
|
|
|
1505
|
11 |
|
if ($this->thumb_data !== null) { |
|
1506
|
|
|
Pel::debug('Appending %d bytes of thumbnail data at %d', $this->thumb_data->getSize(), $end); |
|
1507
|
|
|
// TODO: make PelEntry a class that can be constructed with |
|
1508
|
|
|
// arguments corresponding to the newt four lines. |
|
1509
|
|
|
$bytes .= PelConvert::shortToBytes(PelTag::JPEG_INTERCHANGE_FORMAT_LENGTH, $order); |
|
1510
|
|
|
$bytes .= PelConvert::shortToBytes(PelFormat::LONG, $order); |
|
1511
|
|
|
$bytes .= PelConvert::longToBytes(1, $order); |
|
1512
|
|
|
$bytes .= PelConvert::longToBytes($this->thumb_data->getSize(), $order); |
|
1513
|
|
|
|
|
1514
|
|
|
$bytes .= PelConvert::shortToBytes(PelTag::JPEG_INTERCHANGE_FORMAT, $order); |
|
1515
|
|
|
$bytes .= PelConvert::shortToBytes(PelFormat::LONG, $order); |
|
1516
|
|
|
$bytes .= PelConvert::longToBytes(1, $order); |
|
1517
|
|
|
$bytes .= PelConvert::longToBytes($end, $order); |
|
1518
|
|
|
|
|
1519
|
|
|
$extra_bytes .= $this->thumb_data->getBytes(); |
|
1520
|
|
|
$end += $this->thumb_data->getSize(); |
|
1521
|
|
|
} |
|
1522
|
|
|
|
|
1523
|
|
|
/* Find bytes from sub IFDs. */ |
|
1524
|
11 |
|
$sub_bytes = ''; |
|
1525
|
11 |
|
foreach ($this->sub as $type => $sub) { |
|
1526
|
|
|
if ($type == PelIfd::EXIF) { |
|
1527
|
|
|
$tag = PelTag::EXIF_IFD_POINTER; |
|
1528
|
|
|
} elseif ($type == PelIfd::GPS) { |
|
1529
|
|
|
$tag = PelTag::GPS_INFO_IFD_POINTER; |
|
1530
|
|
|
} elseif ($type == PelIfd::INTEROPERABILITY) { |
|
1531
|
|
|
$tag = PelTag::INTEROPERABILITY_IFD_POINTER; |
|
1532
|
|
|
} else { |
|
1533
|
|
|
// PelConvert::BIG_ENDIAN is the default used by PelConvert |
|
1534
|
|
|
$tag = PelConvert::BIG_ENDIAN; |
|
1535
|
|
|
} |
|
1536
|
|
|
/* Make an aditional entry with the pointer. */ |
|
1537
|
|
|
$bytes .= PelConvert::shortToBytes($tag, $order); |
|
|
|
|
|
|
1538
|
|
|
/* Next the format, which is always unsigned long. */ |
|
1539
|
|
|
$bytes .= PelConvert::shortToBytes(PelFormat::LONG, $order); |
|
1540
|
|
|
/* There is only one component. */ |
|
1541
|
|
|
$bytes .= PelConvert::longToBytes(1, $order); |
|
1542
|
|
|
|
|
1543
|
|
|
$data = $sub->getBytes($end, $order); |
|
1544
|
|
|
$s = strlen($data); |
|
1545
|
|
|
$sub_bytes .= $data; |
|
1546
|
|
|
|
|
1547
|
|
|
$bytes .= PelConvert::longToBytes($end, $order); |
|
1548
|
|
|
$end += $s; |
|
1549
|
|
|
} |
|
1550
|
|
|
|
|
1551
|
|
|
/* Make link to next IFD, if any */ |
|
1552
|
11 |
|
if ($this->isLastIFD()) { |
|
1553
|
11 |
|
$link = 0; |
|
1554
|
|
|
} else { |
|
1555
|
|
|
$link = $end; |
|
1556
|
|
|
} |
|
1557
|
|
|
|
|
1558
|
11 |
|
Pel::debug('Link to next IFD: %d', $link); |
|
1559
|
|
|
|
|
1560
|
11 |
|
$bytes .= PelConvert::longtoBytes($link, $order); |
|
1561
|
|
|
|
|
1562
|
11 |
|
$bytes .= $extra_bytes . $sub_bytes; |
|
1563
|
|
|
|
|
1564
|
11 |
|
if (! $this->isLastIfd()) { |
|
1565
|
|
|
$bytes .= $this->next->getBytes($end, $order); |
|
1566
|
|
|
} |
|
1567
|
11 |
|
return $bytes; |
|
1568
|
|
|
} |
|
1569
|
|
|
|
|
1570
|
|
|
/** |
|
1571
|
|
|
* Turn this directory into text. |
|
1572
|
|
|
* |
|
1573
|
|
|
* @return string information about the directory, mainly for |
|
1574
|
|
|
* debugging. |
|
1575
|
|
|
*/ |
|
1576
|
|
|
public function __toString() |
|
1577
|
|
|
{ |
|
1578
|
|
|
$str = Pel::fmt("Dumping IFD %s with %d entries...\n", $this->getName(), count($this->entries)); |
|
1579
|
|
|
|
|
1580
|
|
|
foreach ($this->entries as $entry) { |
|
1581
|
|
|
$str .= $entry->__toString(); |
|
1582
|
|
|
} |
|
1583
|
|
|
$str .= Pel::fmt("Dumping %d sub IFDs...\n", count($this->sub)); |
|
1584
|
|
|
|
|
1585
|
|
|
foreach ($this->sub as $ifd) { |
|
1586
|
|
|
$str .= $ifd->__toString(); |
|
1587
|
|
|
} |
|
1588
|
|
|
if ($this->next !== null) { |
|
1589
|
|
|
$str .= $this->next->__toString(); |
|
1590
|
|
|
} |
|
1591
|
|
|
return $str; |
|
1592
|
|
|
} |
|
1593
|
|
|
} |
|
1594
|
|
|
|
pel /
pel
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.